Create 027. Remove Element

Author: haibarawu

027. Remove Element

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+/********************
+// 027. Remove Element
+// Given an array nums and a value val, remove all instances of that value in-place and return the new length.
+// Do not allocate extra space for another array, you must do this by modifying the input array in-place with O(1) extra memory.
+// The order of elements can be changed. It doesn't matter what you leave beyond the new length.
+
+// Example 1:
+Given nums = [3,2,2,3], val = 3,
+Your function should return length = 2, with the first two elements of nums being 2.
+It doesn't matter what you leave beyond the returned length.
+
+// Example 2:
+Given nums = [0,1,2,2,3,0,4,2], val = 2,
+Your function should return length = 5, with the first five elements of nums containing 0, 1, 3, 0, and 4.
+Note that the order of those five elements can be arbitrary.
+It doesn't matter what values are set beyond the returned length.
+
+// Clarification:
+Confused why the returned value is an integer but your answer is an array?
+Note that the input array is passed in by reference, 
+which means modification to the input array will be known to the caller as well.
+
+Internally you can think of this:
+// nums is passed in by reference. (i.e., without making a copy)
+int len = removeElement(nums, val);
+
+// any modification to nums in your function would be known by the caller.
+// using the length returned by your function, it prints the first len elements.
+for (int i = 0; i < len; i++) {
+    print(nums[i]);
+}
+********************/
+
+class Solution {
+    public int removeElement(int[] nums, int val) {
+        int i = 0;
+        
+        for (int j = 0; j < nums.length; j++) {
+            if(nums[j] != val) {
+                nums[i] = nums[j];
+                i++;
+            }
+        }
+        
+        return i;
+    }
+}