去掉数组中的重复项，不使用其他空间

Author: jccweb000

algorithms/removeDuplicates/removeDuplicates.js

@@ -0,0 +1,17 @@
+/**
+ * @param {number[]} nums
+ * @return {number}
+ */
+ var removeDuplicates = function(nums) {
+    var copyNums = nums;
+    for (var i=0; i<copyNums.length; i++) {
+      for (var j=i+1; j<copyNums.length;) {
+        if (copyNums[i] === copyNums[j]) {
+          copyNums.splice(j, 1);
+          continue;
+        }
+        j++;
+      }
+    }
+    return copyNums;
+};