Remove Element

最新推荐文章于 2020-04-17 10:53:50 发布

原创最新推荐文章于 2020-04-17 10:53:50 发布 · 3k 阅读

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本文介绍了一种在数组中移除特定值并返回新长度的算法实现。该算法通过遍历数组，将不等于指定值的元素向前移动，并更新新数组的长度。此方法简单高效，适用于多种编程场景。

Question:

Given an array and a value, remove all instances of that value in place and return the new length.

The order of elements can be changed. It doesn't matter what you leave beyond the new length.

Code:

public class Solution {
    public int removeElement(int[] A, int elem) {
        int startPosition = 0;
        for (int i = 0; i < A.length; i++) {
            if (A[i] != elem) {
                A[startPosition] = A[i];
                startPosition++;
            }
        }
        return startPosition;
    }
}