add 7 new drafts

Author: rishabh1403

1301-1400/1389-create-target-array-in-the-given-order.js

@@ -0,0 +1,6 @@
+var createTargetArray = function(nums, index) {
+    
+  return index.reduce((acc,el,idx) => {
+      return [...acc.slice(0,el), nums[idx], ...acc.slice(el)]
+  },[])
+};

201-300/205-isomorphic-strings.js

@@ -0,0 +1,27 @@
+var isIsomorphic = function(s, t) {
+  if(s.length !== t.length) return false;
+  
+  const mapa = new Map();
+  const mapb = new Map();
+  
+  for(let i=0;i<s.length;i++){
+      if(mapa.has(s[i])){
+          if(mapa.get(s[i]) !== t[i]){
+              return false;
+          }
+      }else{
+          mapa.set(s[i],t[i])
+      }
+      
+      if(mapb.has(t[i])){
+          if(mapb.get(t[i]) !== s[i]){
+              return false;
+          }
+      }else{
+          mapb.set(t[i],s[i])
+      }
+  }
+  
+  return true
+  
+};

301-400/345-reverse-vowels-of-a-string.js

@@ -0,0 +1,27 @@
+var reverseVowels = function(s) {
+  const arr = s.split("");
+  
+  let left  = 0,right = arr.length;
+  
+  const vowels = ['A','E','I','O','U','a','e','i','o','u']
+  
+  while(left<right){
+      if(vowels.indexOf(arr[left]) === -1){
+          left++;
+          continue;
+      }
+      if(vowels.indexOf(arr[right]) === -1){
+          right--;
+          continue;
+      }
+      
+      const temp = arr[left];
+      arr[left] = arr[right];
+      arr[right] = temp;
+      
+      left++;
+      right--;
+  }
+  
+  return arr.join("")
+};

301-400/349-intersection-of-two-arrays.js

@@ -0,0 +1,14 @@
+var intersection = function (nums1, nums2) {
+  const set1 = new Set(nums1);
+  const set2 = new Set(nums2);
+
+  const arr = [];
+
+  for (let val of set1) {
+    if (set2.has(val)) {
+      arr.push(val)
+    }
+  }
+
+  return arr;
+};

301-400/374-guess-number-higher-or-lower.js

@@ -0,0 +1,20 @@
+var guessNumber = function(n) {
+    
+  if(guess(n) === 0) return n
+  
+  let low = 1, high = n;
+  while(n>0){
+      const pick = (parseInt(high + low) / 2);
+      const res = guess(pick);
+      
+      if(res === 0){
+          return pick
+      }
+      if(res === -1){
+          high = pick;
+      }
+      if(res === 1){
+          low = pick;
+      }
+  }
+};

301-400/383-ransom-note.js

@@ -0,0 +1,20 @@
+var canConstruct = function(ransomNote, magazine) {
+  const map = new Map();
+  
+  for(let i=0;i<magazine.length;i++){
+      if(map.has(magazine[i])){
+          map.set(magazine[i], map.get(magazine[i])+1)
+      }else{
+          map.set(magazine[i],1)
+      }
+  }
+  
+  for(let i=0;i<ransomNote.length;i++){
+      if(!map.has(ransomNote[i]) || map.get(ransomNote[i]) === 0){
+          return false;
+      }
+      map.set(ransomNote[i], map.get(ransomNote[i])-1)
+  }
+  
+  return true;
+};

301-400/387-first-unique-character-in-a-string.js

@@ -0,0 +1,18 @@
+var firstUniqChar = function(s) {
+  const map = new Map();
+  
+  for(let i=0;i<s.length;i++){
+      if(map.has(s[i])){
+          map.set(s[i],-1)
+      }else{
+      map.set(s[i],i)
+      }
+  }
+  for(let [key,value] of map){
+      if(value !== -1){
+          return value;
+      }
+  }
+  
+  return -1;
+};