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.
- 배열이 주어지면 val 에 해당하는 요소를 삭제하고 해당 배열 길이를 반환
- 새로운 배열에 할당하면 안된다.
- 배열 요소를 정렬하는건 가능하다. 새로운 배열 할당만 안하면 되며 길이를 반환하면 된다.
example
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.
/**
* @param {number[]} nums
* @param {number} val
* @return {number}
*/
var removeElement = function(nums, val) {
while (true) {
for (let i = 0; i < nums.length; i++) {
if (nums[i] === val) {
nums.splice(i, 1);
break;
}
if (i === nums.length - 1) {
return nums.length;
}
}
if (nums.length === 0) {
return nums.length;
}
}
};