Stack td and th elements in reStructuredText list table on small screen.

Remove prefix of Pelican PATH_METADATA using Python named regular expression group.

adb push error caused by illegal character in file name on Android.

Update modification time of photo/video according to EXIF data using command line.

Find images with specific dimension using Linux command line.

Copy files to Android smart phone without losing timestamps.

Build and run GopherJS in Go modules mode.

Use GitHub Actions for Pelican Site CI/CD instead of Travis CI.

Add build timestamp to Pelican site automatically during generating the site.

How to parse a UTF-16 XML file in Go.

Programmatically fire enter key event in Go/GopherJS.

CSS only responsive Bulma 0.9.0 navbar without JavaScript. Toggle mobile menu with CSS only. No JavaScript required.

Remove last character of UTF-8 string via utf8.DecodeLastRuneInString in Go.

Given a directory, remove all empty sub-directories in Go.

Check if an environment variable exists using os.LookupEnv in Go.

Build an offline copy of a website made by Pelican static site generator.

Use regular expresion groups to replace texts in Vim.

Create short pieces of templates using fmt.Sprintf in Go.

Go solution to Distinct powers - Problem 29 - Project Euler.

Read twice or multiple times from the same io.Reader in Go

Given an URL, auto-detect and convert the encoding of the HTML document to UTF-8 if it is not UTF-8 encoded in Go.

Given an URL, determine the encoding of the HTML document in Go using golang.org/x/net/html and golang.org/x/text packages.

Reverse a string using for or range keyword in Go.

Go solution to Number spiral diagonals - Problem 28 - Project Euler.

Go solution to Names scores - Problem 22 - Project Euler.

Go solution to Counting Sundays - Problem 19 - Project Euler.

Go solution to Pandigital products - Problem 32 - Project Euler.

Create new or custom error using fmt.Errorf or errors.New in Go.

Go WebAssembly XMLHttpRequest (XHR) - Issue HTTP requests to exchange data between browsers (client) and servers.

CSS only toggle Foundation accordion (collapsible content). No JavaScript required.

Pelican static site generator - Create URL of page or article based on the full path relative to the content source directory.

Go WebAssembly Event Binding - addEventListener example.

Implementation of reusable Vue.js component for tab panel.

Reusable Vue.js component for Semantic UI basic tabs example.

Given a string with Chinese characters, convert the Chinese characters in the string to Pinyin (romanization system for Chinese) in Go.

Reusable Vue.js component to extend Bootstrap navigational tabs to create tabbable panes of local content.

Given a rune value, check if the rune is a Chinese character.

Download and save files (image, pdf, etc.) from given URL in Go.

Use Go regexp package to repace spaces and newline in the string.

Read non-utf8 webpage with goquery if the charset of the page is known.

Reusable Vue.js component for Bulma tabs, and extend the original Bulma tabs by adding a pane to for each tab.

Go solution to Coin sums - Problem 31 - Project Euler.

Show how to load and run Go WebAssembly code.

Go WebAssembly querySelectorAll example.

Go WebAssembly querySelector example.

CSS only toggle Semantic UI dropdown. No JavaScript required.

CSS only toggle Bulma collapse. No JavaScript required.

CSS only toggle Bootstrap tab panel. No JavaScript required.

CSS only Semantic UI basic tab. No JavaScript required.

CSS only toggle Bootstrap accordion (collapsible content). No JavaScript required.

CSS only toggle Bootstrap collapse. No JavaScript required.

Toggle Bulma modal via Vue.js.

Toggle Bootstrap modal via Vue.js.

CSS only toggle Bootstrap modal. No JavaScript required.

Naive method for primality test in Go: Given a natural number n, if n is divisible by any number from 2 to square root of n, then n is composite. Otherwise n is prime.

Extract plain text from PDF via github.com/ledongthuc/pdf package.

First try of Go WebAssembly - Say Hello World via alert method.

Convert int or int64 to string in Go via fmt.Sprintf.

Increase or decrease font size with buttons via Vue.js.

Use anonymous function in Go defer statement.

Use Go defer statement to elegantly wait for all goroutines to finish.

Pass command-line arguments to make and then pass then arguments to Go program in Makefile.

Calculate politeness of a number online, i.e., the number of ways it can be expressed as the sum of consecutive integers.

Unmarshal JSON data in which the field name is determined at runtime in Go.

Calculate politeness of a number in Go, i.e., the number of ways it can be expressed as the sum of consecutive integers

Upgrade from Ubuntu Linux 17.10 to 18.04 and disk space runs out quickly. And how I fix this issue.

Delete all files with zero size in a directory in Go. Sub-directories included.

Get all links of story highlights of a specific Instagram user in Go. Use only Go standard library and no third-party packages needed.

Online tool for prime factorization and calculating sum of proper divisors. The algorithm is implemented in JavaScript and UI in Vue.js.

Run data change watchers with option via Go/GopherJS/gopherjs-vue.

Go solution to Digit fifth powers - Problem 30 - Project Euler.

Online tool that helps you do prime factorization. The algorithm is implemented in JavaScript and UI in Vue.js.

Watch and react to data changes via Go/GopherJS/gopherjs-vue.

Embed read-only files in Go code.

Sieve of Eratosthenes is a simple and ancient method to find prime numbers up to a given limit. Given a limit, this online demo returns all prime number below the limit.

Online demo of sieve of eratosthenes via Go/GopherJS/gopherjs-vue.

Euler's Totient Function φ(n) counts the positive integers that are relatively prime to n. This online demo use naive method to calculate φ(n) and positive integers coprime to n.

Goldbach's conjecture - Every even integer greater than 2 can be written as the sum of two primes. Given a positive even integer, this online demo returns the two primes.

JavaScript implementation of Sieve of Eratosthenes.

Go solution to Project Euler.

Go solution to Quadratic primes - Problem 27 - Project Euler.

Check if a large number is divisible by 3 or not in Go. This exercise is good example for type casting between int and string in Go.

Check if the value of HTML input text field is integer in Go. Compiled to JavaScript using GopherJS.

2n + 1 = p + 2q always has a solution in primes p and q (not necessarily distinct) for n > 2. This online demo finds p and q for given odd number greater than 5. The demo is written in Go and compiled to JavaScript using GopherJS.

check HTML text input field to see if the value is integer.

2n + 1 = p + 2q always has a solution in primes p and q (not necessarily distinct) for n > 2. This online demo finds p and q for given odd number greater than 5.

2n + 1 = p + 2q always has a solution in primes p and q (not necessarily distinct) for n > 2. Write a Go program to find p and q for given odd number greater than 5.

Test if a number (at least 2-digit) is Lychrel number or not under limited iterations in Go.

Programatically send mails using Gmail.

Get last modified file, name of which starts with specific prefix, in Go.

Given a biased coin with the probability of p to be head on each toss, where 0 < p < 1 and p ≠ 0.5, generate fair results from the biased coin.

Given N numbers, generate any one of the given numbers according to given probabilities.

Chrome extension to get cookies to access Instagram API.

Remove duplicates from slice or array in Go.

Chrome extension to help you get user information on user profile page. Also show id and invisible link to profile picture on the profile page.

Given user name, get Instagram user information, such as id, username, biography, etc., in Go.

Find oldest modified file in the directory, excluding sub-directories, in Go.

Sort a list of words alphabetically in Go.

Write a list of strings to file in Go programming language.

Compare if the size of two files is the same in Go.

Find files after a given timestamp in Go.

Get last modified file before a specific time in Go.

Get last Ubuntu Linux system boot/restart time in Go.

Terminal UI - List items in directory via Go termui package.

Split a folder with many files into multiple sub-folders in Go.

Make slice empty in Go programming language.

The uploaded name of photos/video of gphotosuploader includes full file path. Remove the directory path and leave only file name.

List folder size in ascending orfer, excluding sub-folders, in Go.

Use local web server to achieve communication between Chrome extension and local program.

Chrome extension to get auth.json (cookies of Google Photos and Google account id) of gphotosuploader.

Chrome extension to get Google account id from Google Photos.

Chrome extension to get cookies of gphotosuploader.

Move file to another folder via Go os.Rename method.

Find files modified more than one day via Go standard time package.

Calcualte total size of files in folder, excluding sub-folders in Go.

List .go source files excluding _test.go files via find and grep command in bash.

List folder size in descending and ascending order via du and sort command in bash.

Find set differecne of two arrays, i.e., the elements in one array but not in the other, in Python.

Find the set of all elements (union) in two arrays in Python.

This Chrome extension helps you download Instagram profile picture in full size.

Given the url of Instagram profile picture, return the url of profile picture in full size.

Find common elements (matches, intersection) of two arrays in Python.

Check if a program (or command), such as wget or ffmpeg, is available in Go.

Find set differecne of two arrays, i.e., the elements in one array but not in the other, in JavaScript.

Find set differecne of two arrays, i.e., the elements in one array but not in the other, in Go.

Find the set of all elements (union) in two arrays in JavaScript.

Find common elements (matches, intersection) of two arrays in JavaScript.

Make my static website become like a mobile app via Progressive Web App (PWA).

Find the set of all elements in two arrays in Go programming language.

Find common elements (matches, intersection) of two arrays in Go programming language.

Virtual kayboard/keypad via Go/GopherJS/gopherjs-vue.

Use ffmpeg to merge Instagram video and audio of live replay shared to stories.

Print HTTP response header via Go standard net/http package.

Get urls of video and audio of Instagram user post live videos shared to stories via Go standard regexp package.

Use Go standard os/exec package to run wget via shell command.

Send HTTP request with cookies via Go standard net/http package.

Go solution to Lexicographic permutations - Problem 24 - Project Euler.

Disable caching in Go test.

Use "incognito" manifest key "split" in Chrome Extension to leave logged in status.

HTTP request with custom User-Agent header via Go standard net/http package.

A Chrome extension to help you show Instagram mutual followers on user profile page.

Get file name without extension in Go programming language.

Embed file in QR code via Go programming language.

When web pages are rendered with JavaScript, how to wait until the DOM nodes of original contents are available for appending our nodes?

A Chrome extension to help you show Instagram id on the user page.

A Chrome extension to help you try to get Facebook user id by URL change and print the id next to name if found.

A Chrome extension to help you try to get Facebook user id by URL change.

A naive Chrome extension to help you get URL of images of Facebook Stories.

Trick to get Instagram post live video items.

Access Instagram API to discover Top lives in Go programming language. Use only Go standard library and no third-party packages needed.

Instagram web top search client in Go programming language. Use only Go standard library and no third-party packages needed.

Sort files by size in Go. Use sort.Slice on the slice of os.FileInfo returned by ioutil.ReadDir.

Get URL of photos and videos in Instagram post via Go programming language. Use only Go standard library and no third-party packages needed.

Get URL of all posts of a specific Instagram user via Go programming language. Use only Go standard library and no third-party packages needed.

Get Instagram following and followers of a specific user via Go programming language. Use only Go standard library and no third-party packages needed.

JavaScript code for Bulma modal component. The code is extracted from Bulma official website.

Go toggle code for Bulma modal component.

Get links of Instagram highlight stories of a specific user via Go programming language. Use only Go standard library and no third-party packages needed.

Get links of Instagram stories of a specific user via Go programming language. Use only Go standard library and no third-party packages needed.

CSS only Semantic UI standard accordion. No JavaScript required.

Caveat: Passing reference/pointer to goroutine function while range slice in Go.

Get the list of following Instagram stories via Go programming language. Use only Go standard library and no third-party packages needed.

Given user name, get Instagram user id via Go programming language. Use only Go standard library and no third-party packages needed.

Go strings.Index is equivalent to JavaScript String.prototype.indexOf()

Get the URL of the current tab from Chrome extension, written in Go.

Go toggle code for Bulma dropdown component.

Get domain name from URL via Go standard net/url package.

CSS only toggle Semantic UI modal. No JavaScript required.

CSS only Bulma tab panel implementation.

CSS only Bulma accordion (collapsible content) implementation.

Bulma accordion (collapsible content) implementation via Vue.js.

CSS only toggle Bulma modal. No JavaScript required.

Add more features to Bulma tabs via Vue.js.

Make Bulma components (message, card, etc.) to be of equal height in columns.

Calculate the length of string (UTF-8) in Go. Iterate over the UTF-8 string by for or range keyword.

Show keyCode of pressed key of focused HTML input element via Go/GopherJS/gopherjs-vue.

Go solution to Non-abundant sums - Problem 23 - Project Euler.

Toggle (Show/Hide) HTML DOM element via Go/GopherJS/gopherjs-vue.

Fetch a public post on Blogger and extract data via goquery.

JavaScript code for Bulma dropdown menu. The code is extracted from Bulma official website.

Go toggle code for Bulma responsive navbar, dropdown menu included.

Hard to believe that I don't remember seeing Descartes' rules of signs before -- you'd think this is impossible given the time I spent on ...

JavaScript code for Bulma responsive navbar, dropdown menu included. The code is extracted from Bulma official website.

Remove HTML inline style, i.e., remove style attribute from HTML node via Go net/html package.

Show tooltip when the cursor hovers over the text, and close the tooltip with delay if the cursor is not in the tooltip via Dart programming language.

Convert specific texts to clickable links (<a> tag) in HTML document via Go/GopherJS.

Go solution to Number letter counts - Problem 17 - Project Euler.

Convert specific texts to clickable links (<a> tag) in HTML document via JavaScript.

Append text at the beginning of each line via JavaScript.

Spell numbers from 1 to 1000 in English via Go programming language.

Show tooltip when the cursor hovers over the text, and close the tooltip with delay if the cursor is not in the tooltip via Go/GopherJS.

Show tooltip when the cursor hovers over the text, and close the tooltip with delay if the cursor is not in the tooltip via JavaScript.

Simple tooltip implementation via Go/GopherJS.

Simple tooltip implementation via JavaScript.

This is the last of a small series of similar and basic results in convex geometry.

Get HTML DOM element position (including scroll position of the document) in Go/GopherJS.

Show annotatoin (note) on mouse hovering over text. Used to help users read ancient Buddhist texts.

Go solution to 1000-digit Fibonacci number - Problem 25 - Project Euler.

Go solution to Factorial digit sum - Problem 20 - Project Euler.

Show CSS loading spinner while resources of the website are loading in Go/GopherJS.

Multiplication of big natural numbers in Go. This is for very large positive integers which overflows the built-in numerical type in Go.

Check for undefined in Go/GopherJS.

Go solution to Power digit sum - Problem 16 - Project Euler.

Test if a JavaScript variable is null in Go/GopherJS.

CSS only toggle the color of HTML DOM element. No JavaScript required.

Know which language(s) users prefer on browsers in Go/GopherJS.

Go solution to Lattice paths - Problem 15 - Project Euler.

Go solution to Large sum - Problem 13 - Project Euler.

Addition of big natural numbers in Go. This is for very large positive integers which overflows the built-in numerical type in Go.

Previous I used Caratheodory's theorem to prove Radon's theorem, now I'm going to prove the former.

Go solution to Largest product in a grid - Problem 11 - Project Euler.

I came across Radon's theorem the other day, and found this proof. It must have been discovered before.

Execute a function after waiting a specific length of time in Go/GopherJS.

Manipulate the class attribute of a HTML element via classList property in Go/GopherJS.

Given a string of 20x20 grid, convert the string to two dimensional slice in Go.

Set/Get inline style of a HTML element via style property in Go/GopherJS.

Go solution to Even Fibonacci numbers - Problem 2 - Project Euler.

Go solution to Multiples of 3 and 5 - Problem 1 - Project Euler.

Access HTML data-* attributes of elements in Go/GopherJS.

Send data to servers or retrieve data from servers on browsers - Use XMLHttpRequest method in Go/GopherJS.

Create and append DOM element or text node in Go/GopherJS. Show how to use createElement, createTextNode, and appendChild methods.

Detect user keypress on browsers in Go/GopherJS.

Event binding in Go/GopherJS - Register an event handler to the specified DOM element via addEventListener method.

Change the content of DOM element - Set and get innerHTML and textContent in Go/GopherJS.

Show how to use querySelector, querySelectorAll, getElementById in Go/GopherJS.

Show how to use JavaScript new keyword in Go/GopherJS.

Synonyms - Go/GopherJS idioms and snippets translated to JavaScript

Detect arrow keys pressed by users via Vue.js.

The first frontend program in Go - Show Hello World in your browser.

Discuss why I choose Go to be my frontend programming language. Wirte Go code and run your application on web browsers.

I have tons of files in Python and other languages written as indented by 2 spaces, so I have the following settings in my ~/.vimrc: Howev...

This is not hard but still interesting. A spread of an array of numbers is the difference between its maximum and minimum. Given an array...

I heard this is classic, but turns out not too hard.

This is also an interesting result, although it's quite simple.

For (iin{1,2,3}), there are (2n+i) integers consisting of (n+i) unique ones.

A simple yet surprisingly interesting result.

There are 2n+1 coins each associated with a weight. When we remove any coin, we can split the rest into two piles each with n coins...

Given a sequence of (n) integers (a_1,ldots,a_n), we map it to ...

On the 2D plane there are (n) blue and (n) red points, no three of them are co-linear. Then we can always pair a blue point with a red ...

Given a natural number (integer), calculate the number of divisors of it in Go programming language.

Go solution to highly divisible triangular number - Problem 12 - Project Euler.

Check if Makefile runs on Travis CI or not.

Go solution to largest product in a series - Problem 8 - Project Euler.

Go solution to sum square difference - Problem 6 - Project Euler.

Go solution to longest Collatz sequence - Problem 14 - Project Euler.

Go solution to summation of primes - Problem 10 - Project Euler.

Go solution to 10001st prime - Problem 7 - Project Euler.

Check if an item is in slice or array in Go programming language.

Goldbach's conjecture - Every even integer greater than 2 can be written as the sum of two primes. Given a positive even integer, write a Go program to find the two primes.

Check if a string exists in file via Go regexp package.

Euler's totient function implementation in Go programming language.

Find least common multiple (LCM) by greatest common divisor (GCD) via Go programming language.

Go solution to smallest multiple - Problem 9 - Project Euler.

Go solution to special Pythagorean triplet - Problem 9 - Project Euler.

DOM manipulation - traverse all sibling elements or nodes via Dart.

DOM manipulation - traverse all sibling elements or nodes via JavaScript.

Tab panel implementation via Dart and CSS.

Tab panel implementation via JavaScript and CSS.

Accordion (collapsible content) implementation via Dart.

Modal (Popup) implementation via Dart and CSS. Modal is dialog box/popup window that is displayed on top of the current page.

Go solution to amicable numbers - Problem 21 - Project Euler.

Accordion (collapsible content) implementation via JavaScript.

CSS only accordion (collapsible content) implementation.

Accordion (collapsible content) implementation via Vue.js.

It is said to be well-known, but perhaps I've never seen it before:

CSS only tab panel implementation.

Let (A(n)) denote the number of sequences (a_1ge a_2gecdots{}ge a_k) of positive integers for which (a_1+cdots+a_k = n) and each ...

We call a (5)-tuple of integers arrangeable if its elements can be labeled (a, b, c, d, e) in some order so that (a-b+c-d+e=29). Deter...

Integer exponentiation in Go programming language.

Calculate the sum of all proper divisors (factors) of an integer number in Go programming language.

Simple example of a WebSocket client via GopherJS. Connect and send a message to the WebSocket server that echos everything from clients.

Go solution to largest prime factor of 600851475143 - Problem 3 - Project Euler.

Tab panel implementation via Vue.js and CSS.

Dropdown menu implementation via Vue.js and CSS.

Compute the greatest common divisor (GCD) via Euclidean algorithm in Go programming language.

Modal (Popup) implementation via JavaScript and CSS. Modal is dialog box/popup window that is displayed on top of the current page.

CSS only modal (popup). No JavaScript required. Modal is dialog box/popup window that is displayed on top of the current page.

Modal (Popup) implementation via Vue.js and CSS. Modal is dialog box/popup window that is displayed on top of the current page.

Example of Makefile rules for Go linters.

Prime Factorization - Find all prime factors of a given integer number in Go programming language.

Check whether two strings are anagram of each other by characters count in Go programming language.

Sort a string by character, i.e., convert the string to []rune and then sort the slice of runes in Go programming language.

Check whether two strings are anagram of each other by sorting in Go programming language.

My answer to How can I get Chinese first letter(Pinyin) by using Go language? - Stack Overflow

Compute the length of longest common subsequence via recursion in Go.

Web scraping JavaScript rendered webpages by Chrome Debugging Protocol . Write Go code to programmatically login Facebook and then take screenshot.

Traverse DOM tree to grab visible texts on webpage via JavaScript.

Traverse DOM tree to find out all text nodes via JavaScript.

Build Chrome Extension with Go, compiled to JavaScript via GopherJS. This post show you how to build Chrome extension that convert the web page of Simplified Chinese website to Traditional Chinese.

My implementation of atoi function, which converts a string representing decimal number to its corresponding int type, in Go programmming language.

Pass command line arguments (flags) in Go test.

Use Vue.js to manipulate HTML select element. First show how to use v-model directive to create data bindings for select element. Then use the selected option to make some animation via animate.css.

Embed any type of file in string literal in Go code.

I found a different solution to the second part of this problem. We define a chessboard polygon to be a polygon whose edges are situate...

Test how filename globbing works in Go standard library.

Go solution to largest palindrome made from the product of two 3-digit numbers. - Problem 4 - Project Euler.

CSS rule for HTML img element to be both responsive and centered.

Test Text-to-Speech feature in Web Speech API. Not working in Chromium 57, but OK in Firefox 53.

Let (m_1, m_2, ldots, m_n) be a collection of (n) positive integers, not necessarily distinct. For any sequence of integers (A = (a_1...

The problem is rephrased. Q: A diamond of size n consists of 2n rows of nodes with lengths from top to bottom being 1, 3, 5, ..., 2n-1...

Let (P_1, P_2, dots, P_{2n}) be (2n) distinct points on the unit circle (x^2+y^2=1), other than ((1,0)). Each point is colored eit...

Responsive CSS separator line in nav bar (navigation bar). The CSS divider is vertical on tablet/desktop/wide screen and becomes horizontal on mobile/small screen.

CSS only responsive nav bar (navigation bar) via flexbox. Toggle mobile menu with CSS only. No JavaScript required. No CSS frameworks (Bootstrap, Bulma, etc.) required.

Go implementation of primality test - optimized school method.

Exercise to draw 3x3 grid of dots via Canvas.

Go implementation of Sieve of Eratosthenes.

Pure CSS solution for inverting (transposing) rows and columns of a HTML Table, and provide an option to toggle (original/inverted) the HTML table as well.

Check if an integer number is palindrome in Go programming language.

Go type conversion (type casting) between string and integer number.

Go type conversion (type casting) between string and floating number.

Get the attribute of a HTML element via named group matches in Go regexp package.

Given a text and a wildcard pattern, implement wildcard pattern matching algorithm that finds if wildcard pattern is matched with text in Go programming language.

Select and style the first row (or n-th row) of table via CSS :nth-of-type() selector

Select and style the first column (or n-th column) of table via CSS :nth-of-type() selector

Embed data/assets/resources/binary in Go code, and compiled by GopherJS to a single JavaScript file which runs on the front-end browser.

Make a responsive HTML table using div element and Bulma CSS framework.

Go implementation of BK-tree data structure used for approximate string matching in a dictionary. The distance metric here is Levenshtein distance, the minimum number of single-character edits (insertions, deletions or substitutions) required to change one string into the other.

Go implementation of Wagner-Fischer algorithm that computes the edit distance between two strings of characters. The edit distance here is Levenshtein distance, the minimum number of single-character edits (insertions, deletions or substitutions) required to change one string into the other.

Recursive implementation of Levenshtein distance algorithm in Go programming language. Levenshtein distance (LD) is a measure of the similarity between two strings, the minimum number of single-character edits (insertions, deletions or substitutions) required to change one string into the other.

Example of Go enumerated constants using iota enumerator, and print the string representation of enum name.

reStructuredText - “Back to Top” Link

Simple tooltip implementation via Dart programming language.

Create gh-pages branch and publish your static website to GitHub Pages in Makefile.

GitHub Pages set Content-Type according to the name of symlink, not the file name that the symlink references to.

CSS only toggle the width of centered HTML DOM element. No JavaScript required.

Create a directory if it does not exist. Otherwise do nothing.

Check if a file, directory, or symbolic link exists, or not exists, in Go programming language.

Demonstrate the usage of your methods by writing example code in the testing of your package in Go programming language.

My favorite way to empty an array in JavaScript and why.

Get query string of URL in request handler of HTTP server via Go standard net/http Package.

CSS only responsive Bootstrap navbar (navigation bar) without JavaScript. Toggle mobile menu with CSS only. No JavaScript required.

XMLHttpRequest (XHR) example by Vue.js.

How to seed the pseudorandom number generator (PRNG) properly in Go programming language.

Enable cross-domain XHR requests in Go server via Go standard net/http package.

Implement static file server with custom HTTP 404 Not Found handler via Go standard net/http package.

A Go server that returns HTTP request headers via JSONP.

Go equivalent of Python string startswith and endswith methods.

JSONP example - show your HTTP request headers.

Pretty print JSON string via Vue.js.

JSONP example by Vue.js.

Pass slice or array as variadic (...) parameter in Go programming language.

Variadic Function Example in Go - Implement addEventListener method via GopherJS.

Find all permutations of a given string containing all distinct characters in Go programming language.

Pure CSS typing text effect. No JavaScript required.

Sequential and parallel typing text effect by Vue.js.

Sequential typing text effect by JavaScript.

Parallel typing text effect by JavaScript.

Simple tooltip implementation via React JavaScript.

Simple tooltip implementation via Vue.js.

CSS only tooltip, extracted from the example of MDN, and the corresponding JavaScript implementation.

Quiz will appear at the end of YouTube video.

Show youtube video if users pass the quiz.

Do not use fmt.Fprintf to write to file

Web scraping - fetch HTML DOM Style Object properties via goquery in Go programming language.

CSS only toggle (show/hide) HTML DOM element without JavaScript.

Toggle (Show/Hide) HTML DOM element in JavaScript.

Extract template data from human readable YAML file and create textual output in Go.

What is the sharpest sword? What is the deadliest poison? What is the fiercest fire? What is the darkest night?

How to access (get/reference) DOM Element in Vue.js?

Toggle (play/pause) audio sound if users click on DOM Element in Vue.js.

Play audio sound if users click on DOM Element in Vue.js.

CSS only responsive Bulma nav bar (navigation bar) without JavaScript. Toggle mobile menu with CSS only. No JavaScript required.

Bug in Go 1.8 text/template and html/template package

Go front-end programming - online service for conversion of Traditional and Simplified Chinese via GopherJS/godom/gojianfan.

gojianfan - converter for Traditional and Simplified Chinese in Go programming language.

Convert the kebab-case to camelCase in Go programming language.

Fetch and parse a public post on Facebook and extract data via goquery in Go programming language.

Parse the string of Unix time (also known as POSIX time or Epoch time) in Go programmming language.

Implement querySelector in goquery

Detect arrow keystrokes via event.key of KeyboardEvent in JavaScript.

Complement to Go text/template and html/template package - Parse all files in directory (including sub-directories).

Generate a random string from [a-z0-9] in Python

Add method (function) to an existing type in external package in Go programming language.

Get string from io.Writer (io writer) in Go programming language.

In a mathematical competition some competitors are friends. Friendship is always mutual. Call a group of competitors a clique if each two of...

Generate a random string from [a-z0-9] in C programming language.

Toggle (Show/Hide) HTML DOM element in React JavaScript.

Toggle (Show/Hide) HTML DOM element in Vue.js.

draggable, movable (drag and drop) HTML element in Vue.js.

Template inheritance via Go html/template package. Show how one tempalate extends from another, and also include templates, just as how we do by Python Jinja2.

Provide input suggest feature via Vue.js. Usually used in dictionary application.

How to monitor the change event of input text element in Vue.js.

Read lines from web URL via Go programming language.

Initialize 2-dimensional array/slice in Go programming language.

Virtual kayboard/keypad in GopherJS. Used in Pāli Dictionary.

Insert a line or string to n-th line of the file via Go programming language.

Virtual kayboard/keypad in Dart programming language. Used in Pāli Dictionary.

Virtual kayboard/keypad in vanilla JavaScript. Used in Pāli Dictionary.

Provide input suggest feature via AngularJS. Usually used in dictionary application.

Use Animate.css and AngularJS to animate your webpage.

Use Animate.css and Vue.js to animate your webpage.

Use Animate.css and GopherJS to animate your webpage.

Append text line or string to the end of file via Go programming language.

Generate a random string from [a-z0-9] in Dart.

Virtual kayboard/keypad via Vue.js. Used in Pāli Dictionary.

Virtual kayboard/keypad via AngularJS. Used in Pāli Dictionary.

"LET IT COME, LET IT GO" ~ Ajahn Jayanto

Remove leading and trailing empty strings in string array/slice via Go programming language.

Replace specific pattern of strings in HTML files under directory via sed.

Test if a string consists of single character or letter in Go programming language.

Implementation of setting feature in web application via JSON, Web Storage (localStorage), and JavaScript.

Test if an element contains a class via GopherJS.

Generate a random string from [a-z0-9] in JavaScript.

Read an image from web and resize it in Go programming language.

Pelican static site generator - Localize theme with i18n_subsites plugin via custom Jinja2 filter. Implementation of gettext-like filter.

Replace specific pattern of strings in HTML files under directory via sed.

Pelican static site generator - Get partial pages or articles with specific metadata by Jinja2 built-in selectattr filter in theme.

Example of accessing browser URL via JavaScript window.location.

What you have done unto others in past lives or in this one (cause), weaves the karmic agreement of your present and future (effect). Whatever one puts out into the Universe will come back to them. As you sow, so shall you reap.

Pelican static site generator - Get a single page or article by slug metadata in theme.

Pelican static site generator - Support multilingual in Pelican theme. Translate strings according to default language of settings in the theme. (implement macro gettext)

Access (raw) href value of anchor tag (<a>) via GopherJS.

Test if a variable is null via GopherJS.

Change browser URL without reloading web pages - Example for how to use HTML history API.

Change browser URL without reloading web pages - Example for HTML history API via GopherJS.

There are n>=2 line segments in the plane such that every two segments cross and no three segments meet at a point. Geoff has to choose an ...

Access URL, path, query string, etc. of current URL via window.location and GopherJS.

Implementation of setting feature in web application via JSON, Web Storage, and GopherJS.

Detect arrow keystrokes via GopherJS.

DOM Example of createElement and createTextNode via GopherJS.

Get prefix or suffix of a string in Makefile.

Remove prefix or suffix from string via Go programming language.

Example of onmouseenter and onmouseleave event via GopherJS.

Concatenate and minify JavaScript files via Makefile, curl, and online Google Closure Compiler.

Concatenate and minify JavaScript files via Bash script, curl, and online Google Closure Compiler.

Publish your static website to GitHub project pages via ghp-import in Makefile.

Given an installed package name on Ubuntu Linux, find its version in Makefile.

Fail to build OpenCC Go binding on Ubuntu Linux 16.10, and how I fix it.

How to parse command-line arguments (string variable) via flag package in Go programming language.

Copy large number of files efficiently via Bash script on Linux.

Focus and Blur of DOM element via GopherJS.

... without judging or criticising, but just noticing ... - Self-view, Personality and Awareness - Luang Por Sumedho

Traverse DOM tree via GopherJS.

Replace DOM element in place via GopherJS.

Check node type (nodeType) of DOM element via GopherJS.

Access child nodes (childNodes) of DOM element via GopherJS.

Add tooltip to every word via GopherJS. Used in Pāli Tipiṭaka.

Treeview via GopherJS. Used in Pāli Tipiṭaka.

Resizable views via GopherJS. Used in Pāli Tipiṭaka.

Two ways to register event handler via GopherJS: Set element on-Event property or addEventListener.

Use getElementsByTagName to access head element via GopherJS.

Tooltip via GopherJS. Used in Pāli Tipiṭaka.

Insert (add, append) CSS to head element via GopherJS.

JavaScript setTimeout equivalent in Go/GopherJS - time.AfterFunc.

Show how to access/use this keyword via GopherJS.

Example - Set or Get CSS property of DOM element via GopherJS.

Add tooltip to every word via AngularJS. Used in Pāli Tipiṭaka.

Synonyms - Python try-except translated to Go programming language.

Client side gettext-like Internationalization (i18n) via AngularJS Directives.

Client side gettext-like Internationalization (i18n) via AngularJS.

Treeview via AngularJS. Used in Pāli Tipiṭaka.

Tooltip via AngularJS. Used in Pāli Tipiṭaka.

Resizable Views via AngularJS. Used in Pāli Tipiṭaka.

Find Pāli word in Velthuis scheme, and replace them with unicode via Go programming language.

Find redundant files saved by Chrome browser via Bash script.

Find redundant files saved by Chrome browser via Go.

Iterate over all DOM nodes/elements via goquery in Go programming language.

Use find command to find all files with specific name and delete them in one line of command.

Use find command to find all HTML files in a directory, but exclude the HTML files in some sub-directory.

Run wkhtmltopdf on Travis CI, which convert HTML files with chinese characters to PDF.

Convert HTML files in directory to PDF recursively via wkhtmltopdf and Bash script.

Guess metadata from HTML webpage and convert it to reStructuredText format.

Add basic HTML table to reStructuredText support for online HTML to reStructuredText service on Google App Engine Go.

Online service on Google App Engine Go, which helps you extract title, image URL from Taobao item webpage, and output in reStructuredText format.

Online HTML to reStructuredText service on Google App Engine Go.

Convert HTML to restructuredtext format via net/html package in Go programming language. (Not fully supported)

Given a webpage URL. Fetch the title of the webpage and output reStructuredText link on Google App Engine Go.

Get HTML title via net/html package in Go programming language.

Remove execute(x) permission of files in directory recursively via chmod command and Bash script.

Convert HTML unordered (bulleted) list, HTML link, and HTML image to restructuredtext format via net/html package in Go programming language.

Convert HTML unordered (bulleted) list and HTML link to restructuredtext format via net/html package in Go programming language.

Search Taobao.com.

Convert HTML unordered (bulleted) list to restructuredtext format via goquery in Go programming language.

Replace HTML links node with text node of restructuredtext format in a webpage via goquery in Go programming language.

Example of copy local files to remote machine which allows only SSH key login via rsync command.

Custom 404 page for GitHub Pages. In the 404 page, a redirect link is created based on the current URL path.

Upgrade from AWS EC2 t1.micro running Ubuntu 12.04 LTS with Apache-2.2 to t2.nano running Ubuntu 14.04 LTS with Apache-2.4.

Create or migrate user account with SSH login only (no password login) on AWS EC2 t2.nano with Ubuntu 14.04 LTS.

Move large number of files via tar command under Bash. This is much quicker than mv command if there are a lot of small files.

Wrap Pāli words in span element via regular expression and Go.

Get the number of children nodes via goquery in Go.

Convert the format (Big5 encoding to UTF-8, remove DOS newline in file, replace string big5 with UTF-8, and append UNIX newline to end of file) of HTML files in directory via Bash script.

Convert the name of files in directory to lowercase via Bash script.

Output fixed width/length string in Go programming language.

Read Yes/No (i.e., ask for user confirmation) from console in Go programming language.

Create reStructuredText metadata via Go text/template and text/width package.

Get the number of child nodes via Go net/html package.

Convert encoding of file from Big5 to UTF-8, remove DOS newline in file, replace string big5 with UTF-8, and append UNIX newline to end of file.

Get Vine video src URL via goquery in Go programming language. My answer to Stack Overflow question: Getting blank return when using GoQuery to get video src

Scape JavaScript code to get campaign number via Go strings package.

Answer to Stack Overflow question: go - How to get simple text from HTML page with goquery?.

Pelican static site generator - Link to section in another page via reStructuredText.

Equivalent of JavaScript getElementById via Go net/html package.

Convert HTML table to reStructuredText list-table via goquery in Go programming language.

Convert HTML table to reStructuredText list-table via Go net/html package. This is experimental and not robust implementation.

Convert all HTML links to restructuredtext in a webpage via goquery in Go programming language.

Extract text (i.e., footnote) in HTML via state machine and goquery in Go programming language.

Iterate over all DOM elements in HTML via Go programming language. Use net/html package to parse and iterate all elements in HTML. Search for HTML links and output them in reStructuredText format.

Copy content of textarea to clipboard via JavaScript.

Example for how to replace a string in a variable in Makefile.

A TIME TO LOVE - The Way It Is - Luang Por Sumedho

Search PTT BBS.

Readlines from string or file in Go programming language.

Go - write string to file via os Create method and io Copy method.

Extract title and URL from Hacker News comment via goquery, and then output the info to reStructuredText footnote.

Search links of major search engines - Google, DuckDuckGo, Bing, Yahoo, Baidu, Yandex, Ecosia, Qwant.

Wrap Pāli words in span element via regular expression and JavaScript.

The Ariya Sangha - Peace Beyond Delusion (II) - Luang Por Liem Ṭhitadhammo

Copy content of textarea to clipboard via GopherJS.

Extract title, image, and URL in buy123 product webpage via goquery, and then output the info to reStructuredText image.

Make reStructuredText links of the same name anonymous via regular expression by sed stream editor.

Replace footnote in reStructuredText format via regular expression by sed stream editor.

Replace footnote in reStructuredText format via regular expression in Vim editor.

Server get HTML form value from HTTP POST in Go programming language.

Remove query string from URL in Go programming language.

Get DOM element position (offset) via GopherJS.

Find photos of me on Facebook.

Get UTF-8 string width (width of English letter is 1, width of CJK character is 2) in Go programming language.

A simple example to read HTML title via goquery in Go.

Makefile's notdir = Python basename / Go path.Base.

Convert file encoding from Big5 to UTF-8 via Go programming language.

Insert a line after first pattern match via sed stream editor.

Download and save HTML file from given URL via Go. Do nothing if the HTML file already locally exists.

Convert all files in a directory recursively (i.e., including subdirectories of the directory) from Big5 encoding to UTF-8 via iconv command.

Find Pāli word in Velthuis scheme via Go programming language.

Read JPEG image date from Exif metadata in Go programming language.

Append text at the beginning of each line via sed stream editor.

insertAfter - Insert new node after reference node via GopherJS. (opposite of insertBefore)

Access head element in HTML document via GopherJS.

Convert Traditional Chinese PO file to Simplified Chinese via OpenCC and sed in Makefile.

Concatenate and Minify CSS via sed and tr command in Makefile.

Minify HTML via Go programming language.

Minify CSS via Go programming language.

Remove C/C++ style comments via Go programming language.

Concatenate and compress JavaScript files via Go programming language and online Google Closure Compiler.

Concatenate JavaScript files via Go programming language.

Automatically convert Traditional Chinese (zh_TW) PO file to Simplified Chinese (zh_CN) by OpenCC and Go programming language.

Makefile - Create symbolic link if it does not exist. Otherwise do nothing.

Find redundant files saved by Chrome browser via Python.

Example for block action in Go text/template and html/template packages.

Extract URL from reStructuredText link and insert the URL in the file as metadata via Python.

Conversion Button of Traditional/Simplified Chinese on Website via JavaScript.

Python script to convert HTML table to reStructuredText list-table via Beautiful Soup 4.

Make font size of your website larger/smaller via JavaScript.

Online concatenate and compress JavaScript files via Python script.

Concatenate JavaScript files via Python script.

Synonyms - Python Beautiful Soup 4 translated to JavaScript.

Pelican static site generator - add Buddhist calendar in your theme.

Write a bash script to convert wav to mp3 via ffmpeg on Ubuntu Linux 15.10.

mkdir -p command in Go

mkdir -p command in Python

CSS for reStructuredText (rst) footnote and citation.

Go regexp example of named group matches - extract metadata from file path.

Pelican static site generator - Generate index.html by writing reStructuredText or Markdown.

echo colorful output in Makefile.

Show how to use MakeFunc in GopherJS by XMLHttpRequest (XHR) example.

Python scripts to export PIXNET blog posts to files of reStructuredText format.

Check if an item exists (is populated) in web storage (localStorage or sessionStorage) by GopherJS.

Python Regular Expression to convert footnotes in file to reStructuredText format.

Go querySelectorAll and querySelector Example by GopherJS.

Tiny Go embedding code example of analogy to StringList implementation of reStructuredText.

Call a function (method), with multiple arguments and returns, of a struct by name during run-time in Go. (run-time reflection)

Call a function (method) of a struct by name during run-time in Go. (run-time reflection)

Synonyms - Python class translated to Go

Go toggle-able sidebar by GopherJS, inspired by Octopress.

Go implemantation of succinct trie ported from Bits.js.

Fix runtime error via goroutine in Go code compiled to JavaScript by GopherJS.

Check if something (object, variable, API, ...) is undefined or not in GopherJS.

Count leading spaces of a string in Go.

List all files in a directory in Go. Similar to Python os.walk.

Iterate over UTF-8 or non-ASCII strings in Go. Iterations by for or range keywords.

Fix the bug in succinct trie implementation of Bits.js - Wrong trie insertion if words are not inserted in alphabetical order.

Add the enter keypress event handler for the input text element by GopherJS

Go programming language - Remove all children of a DOM element by GopherJS.

Save variables of any type (struct, map, array, slice, etc.) in JSON format file via Go programming language.

Pretty print variable (struct, map, array, slice) in Go.

Makefile - Create a directory if it does not exist. Otherwise do nothing.

Synonyms - Go/GopherJS idioms and snippets translated to JavaScript

Implement gettext function on front-end (browsers) by GopherJS. The gettext function translates a text string into the user's native language.

Write a Go program to compile your SASS/SCSS (CSS extension language) files to CSS via libsass and Go wrapper for libsass.

Convert PO files to JSON format via Go. The data of JSON format can be passed to front-end by web servers to translate a text string into the user's native language. You can use the JSON data to implement gettext function in browsers.

Convert PO files to JSON format via Python. The data of JSON format can be passed to front-end by web servers to translate a text string into the user's native language. You can use the JSON data to implement gettext function in browsers.

Run Golang program in your browser by GopherJS. Access HTTP Request Header by getAllResponseHeaders() method in XMLHttpRequest (XHR) request.

Run Golang program in your browser by GopherJS. Access Accept-Language field in HTTP Request Header by JSONP to detect browser language preference (user locale).

Run Golang program in your browser by GopherJS. Access window.navigator.language of NavigatorLanguage API to detect browser language preference (user locale).

Packages of reStructuredText (to HTML) implementation in Go.

Run Golang program in your browser by GopherJS. Show how to make cross-domain requests (CORS) by JSONP (JSON with Padding) technique, which allows data to be retrieved from servers of other domains. This is an example of full-stack Go, which uses Golang to develop web applications in both front-end and backend.

Parse Accept-Language in HTTP Request Header in JavaScript Programming Language.

Run Golang program in your browser by GopherJS. Use XMLHttpRequest (XHR) to send HTTP POST requests to send JSON data to remote server. This is an example of full-stack Go, which uses Golang to develop web applications in both front-end and backend.

Run Golang program in your browser by GopherJS. Use XMLHttpRequest (XHR) to send HTTP GET requests to retrieve JSON data from remote server.

Use xgettext (one of GNU gettext utilities) to extract translatable strings from HTML templates of Go html/template.

i18n (Internationalization) Go web applications by GNU gettext tools and html/template. Use PO and MO files generated by gettext in Golang web application to render HTML of specific languages by html/template.

Run Golang program in your browser by GopherJS. Show how to write a Go program to do DOM manipulation by example. This example show how to toggle (show/hide) a HTML element by GopherJS and its DOM binding.

Run Golang program in your browser by GopherJS. Show how to write a Go program to do DOM manipulation by example. This example show how to write a draggable/movable element by GopherJS and its DOM binding.

i18n (Internationalization) Python web applications by GNU gettext tools and Jinja2. Use PO and MO files generated by gettext in Python web application to render HTML of specific languages by Jinja2 template engine.

Run Golang program in your browser by GopherJS. Show how to write a Go program to do DOM manipulation by example. This example show how to write a dropdown menu by GopherJS and its DOM binding.

Run Golang program in your browser by GopherJS. Show how to write a Go program to do DOM manipulation by example. This example show how to toggle (play/pause) sound on click event of a HTML DOM element.

Run Golang program in your browser by GopherJS. Show how to write a Go program to do DOM manipulation by example. This example show how to play sound on click event of a HTML DOM element.

Internationalization (i18n) of Python applications by GNU gettext tools. This post shows how to use PO and MO files in Python.

Run Golang program in your browser by GopherJS. Show how to write a Go program to do DOM manipulation by example. This example show how to create a new HTML element and append it to the DOM tree.

Run Golang program in your browser by GopherJS. Show how to write a Go program to do DOM manipulation by example. This example show how to hide HTML elements by setting its CSS property display:none.

Online snake game using Go programming language, compiled to JavaScript by GopherJS. (GopherJS DOM example)

Online Pali (Pāli, Pāḷi) Input Method using Go programming language, compiled to JavaScript by GopherJS. (GopherJS DOM example)

Run Golang program in your browser by GopherJS. Show how to write a Go program to do DOM manipulation by example. This example shows how to access HTML data-* attribute.

Run Golang program in your browser by GopherJS. Show how to write a Go program to do DOM manipulation by example. This example show how to access the value of HTML input element.

Run Golang program in your browser by GopherJS. Show how to write a Go program to do DOM manipulation by example. Detect user keypress by registering keyboard event handler and print out the keycode of the keyboard event.

Run Golang program in your browser by GopherJS. Show how to write a Go program to do DOM manipulation by example. Use addEventListener to attach event handler to specific DOM element.

Example of how to use serve and build command of GopherJS.

Run Golang program in your browser by GopherJS. Show how to write a Go program to do DOM manipulation by example. Use getElementById to access DOM element and set innerHTML of the element.

Use SQLite in Go program. Write a Golang program to initialize a database, create a table, write some data to the table and read data from the table.

Internationalization (i18n) of Go applications by GNU gettext tools. This post shows how to use PO and MO files in Golang.

Automatically convert Traditional Chinese (zh_TW) PO file to Simplified Chinese (zh_CN) by OpenCC and Python programming language.

Support multiple languages in your (web) applications, by GNU gettext tools, which include xgettext, msginit, msgmerge, and msgfmt.

Web scrape JavaScript rendered webpages by dryscrape, a lightweight web scraping library for Python.

Automatic deployment of websites, by Pelican, Travis CI, and Github Pages

Conversion of Traditional and Simplified Chinese by OpenCC and Python programming language.

Conversion of Traditional and Simplified Chinese by OpenCC and Go programming language.

Write a bash script to use wget to fetch webpages.

Use regular expression in Python to search and find strings marked for i18n (Internationalization)

International Mathematical Olympiad (IMO) 2014 Problem 6

Asian Pacific Mathematics Olympiad (APMO) 2015 Problem 4

International Mathematical Olympiad (IMO) 2010 Problem 6

International Mathematical Olympiad (IMO) 2015 Problem 6

In a recent algorithmic coding contest which I didn't do well, the hardest problem killed me. It distinguished me from other superior coders. But it's still an interesting one. The problem is essentially to solve a 0/1 knapsack problem on a tree where each node is associated with an …

United States of America Mathematical Olympiad (USAMO) 2015 Problem 3

Generate a random string from [a-z0-9] in Golang.

i18n and L10n of Google App Engine Python web application, with webapp2, Jinja2, Babel, and pytz.

The infamous Grasshopper problem

Save JSON-format data in the directory using Go programming language.

Use channels to wait for all goroutines to finish

Responsive top navigation bar (navbar) used in this website.

Include regular CSS file in SCSS file with pyScss.

A simple custom responsive grid layout exmaple without CSS frameworks.

Comparison of Python Jinja2 and Go html/template, side by side for easy reference - Go template custom function vs Jinja2 custom filter and function.

Run cleanup function when receiving ^C signal.

Poll RSS/ATOM feeds with Goroutines

Multiple web.py applications with the same context (web.ctx)

Comparison of Python Jinja2 and Go html/template, side by side for easy reference - Mimic Jinja2 template inheritance in Go html/template

Comparison of Python Jinja2 and Go html/template, side by side for easy reference - Loop through Python Dictionaries vs Go Maps

Comparison of Python Jinja2 and Go html/template, side by side for easy reference - Python List vs Go Arrays and Slices - Loop Index

Comparison of Python Jinja2 and Go html/template, side by side for easy reference - Python List vs Go Arrays and Slices

Web application (web.py framework) template runs on both Google App Engine Python and Apache with mod_wsgi.

Parse Atom 1.0/RSS 2.0 web feeds in Go programming language.

Convert Atom 1.0 to RSS 2.0 format in Go programming language.

Access data-* attribute of HTML elements in Dart

How to read XML/HTML files in Go programming language (for newbie) - Parse Atom 1.0 format.

How to read XML/HTML files in Go programming language (for newbie) - Parse RSS 2.0 format.

How to read XML/HTML files in Go programming language (for newbie) - Parse OPML format concisely.

How to read XML/HTML files in Go programming language (for newbie) - Parse OPML format.

Comparison of Python Jinja2 and Go html/template, side by side for easy reference - print Hello World! on screen

How to read XML/HTML files in Go programming language (for newbie) - Read multiple direct child elements.

Online Pali (Pāli, Pāḷi) Input Method using Dart programming language.

Parse Accept-Language in HTTP Request Header in Go Programming Language.

Comparison of Python Jinja2 and Go html/template, side by side for easy reference - Load and Serve Templates

How to read XML/HTML files in Go programming language (for newbie) - Read a direct child element.

Cross-domain requests by JSONP with object instance function as callback on Google App Engine for Python.

Cross-domain requests by JSONP with anonymous callback function on Google App Engine for Python.

Cross-domain requests by JSONP on Google App Engine for Python.

How to read XML/HTML files in Go programming language (for newbie) - Read element attribute.

Detect keystrokes in Dart programming language.

How to pass command-line arguments (flags) in Go programming language.

How to read XML/HTML files in Go programming language (for newbie) - Read element and its content.

Draggable, movable (drag and drop) HTML element using Dart programming language.

e.clientX => e.client.x & e.clientY => e.client.y

Demonstrate how to make an online 0-9 keypad, which is draggable via jQuery and toggleable via vanilla JavaScript.

Show how to pass JSON-format data using HTTP POST between browser (implemented with Dart) and web server (implemented with Go).

Dropdown menu using Dart programming language.

Hide div element when clicked outside it, using Dart programming language.

Load Dart script while development or the browser supports dart. Otherwise load JavaScript as usual.

Hide div element when clicked outside it, in vanilla JavaScript way. No jQuery or libraries are used.

Dropdown menu using vanilla JavaScript. No jQuery or libraries are used.

Toggle element (usually div) with pure CSS only (no JavaScript). Suitable for dropdown/menu application.

Use AngularJS powerful custom directive to implement dropdown menu without jQuery or any other library.

List all files in a directory recursively (i.e., including subdirectories of the directory), and use sed to rename the files.

“Whomsoever you encounter is the right one.”, “Whatever happened is the only thing that could have happened.”, “Each moment in which something begins is the right moment.”, “What is over, is over.”

Insane DFS

Swap and Sum

Robot

The function ares_gethostbyname()  in  c-ares  library, as of version 1.10.0, is slow on some Windows machines. ...

DOM element remove all children in Dart programming language

Hello World program in C programming language

Example of toggling DOM element using AngularJS, without any JavaScript code.

Get the offset (position) of an AngularJS DOM element without jQuery

Solution to mouseenter and mouseleave event in old version AngularJS.

Draggable, movable HTML element using AngularJS.

Safely execute an expression in angular from outside of the angular framework.

Pretty print variable in Python

Set HTML document title in AngularJS

Update parent scope from child scope by event dispatching and listening mechanism.

jQuery datepicker wrapped in AngularJS directive.

Remove trailing newline (carriage return) of a string in C programming language.

My Last Words - Ajahn Prawit

Toggle sound on click event of DOM element.

Detect user locale/language from HTTP request header on Google App Engine for Python.

Parse Accept-Language in HTTP Request Header in Python.

Load CSS file dynamically.

Remove leading and trailing whitespaces of a string in JavaScript.

Play sound on click event of DOM element.

JavaScript cross-browser HTTP POST request

JavaScript cross-browser HTTP GET request

Check DOM readiness in vanilla JavaScript.

JavaScript library New Tong Wen Tang for conversion of Traditional and Simplified Chinese.

Use onmousedown event instead of onclick event if the event handler to be fired before onblur event.

Load website icon (favicon) dynamically.

JavaScript equivalent of basename program.

JavaScript Cross-Browser Implementation of onMouseEnter and onMouseLeave Event

Change the scope (context) of anonymous function - change what this keyword refers to in anonymous function.

Discuss the scope (context) of event handler and how to change what this keyword refers to.

Detect the content change of HTML input elements in a cross-browser and consistent manner.

Use social buttons to make your website more popular.

JavaScript single callback for multiple asynchronous XHR requests.

Redirect users to another website if the website is available.

XSLT (Extensible Stylesheet Language Transformations) in Python.

JavaScript equivalent of Python string startswith, endswith, and contains.

Create DOM elements by JavaScript.

Serve DOM elements to clients dynamically on Google App Engine Python

Bug-free way of removing child nodes of a DOM element in JavaScript.

Cross-domain AJAX requests

1% width of browser window equal to how many pixels?

Width of browser window in pixel.

Config Access-Control-Allow-Origin in HTTP headers on Google App Engine.

Compare mouseenter, mouseleave, mouseover, and mouseout events.

Load JavaScript scripts dynamically with dependencies.

Send/receive data to/from Google App Engine Python servers by HTTP POST requests in AJAX way.

Draggable, movable HTML element using vanilla JavaScript.

Rich text editor with math equation dialog using Google Closure Library.

Get DOM element position (including scroll position) using JavaScript.

JavaScript Back to Top Link

Detect arrow keystrokes in JavaScript.

Event target element in JavaScript event handling.

Load JavaScript or CSS on demand.

Given a set of strings (words), and an user input string, output a set of strings with prefix the same as the user input string

Simple usage example of Google App Engine Python Datastore.

Put your menu bar on top of the website, no matter how users scroll.

Let website users upload multiple files to Google App Engine (Python) servers.

Python XML/HTML manipulation primer of xml.dom.minidom

%2c%e3%80%90%e5%bd%a2%e3%80%91%e6%97%a0%e7%a2%8d%e7%9a%84%e3%80%82 <=> ,【形】无碍的。

Evaluate Multivariate Normal Distribution with NumPy in Python.

Upload a file to the server in your Android app.

Python XML/HTML manipulation primer of xml.dom.minidom

Python XML/HTML manipulation primer of xml.dom.minidom

Python XML/HTML manipulation primer of xml.dom.minidom

Python XML/HTML manipulation primer of xml.dom.minidom

Python XML/HTML manipulation primer of xml.dom.minidom

Python XML/HTML manipulation primer of xml.dom.minidom

Type the math symbol "argmin" and "argmax" in LaTeX

Type romanized Pāli on your Ubuntu Linux.

Show source code on your website

Show math symbols on the blog or website.