Given an array and a value, 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.
我的代码:
public int removeElement(int[] nums, int val) {
int length = 0;
for (int i = 0; i < nums.length; i++) {
if (nums[i] != val) nums[length++] = nums[i];
}
return length;
}