977.有序变量的平方(SquaresofaSortedArray)javascript

题目来自于： https://leetcode-cn.com/problems/squares-of-a-sorted-array/

给定一个按非递减顺序排序的整数数组 A，返回每个数字的平方组成的新数组，要求也按非递减顺序排序。

Given an integer array nums sorted in non-decreasing order, return an array of the squares of each number sorted in non-decreasing order.

示例 1：

输入：[-4,-1,0,3,10]
输出：[0,1,9,16,100]

Example 1:

Input: nums = [-4,-1,0,3,10]
Output: [0,1,9,16,100]
Explanation: After squaring, the array becomes [16,1,0,9,100].
After sorting, it becomes [0,1,9,16,100].

示例 2：

输入：[-7,-3,2,3,11]
输出：[4,9,9,49,121]

Example 2:

Input: nums = [-7,-3,2,3,11]
Output: [4,9,9,49,121]

提示：

1 <= A.length <= 10000
-10000 <= A[i] <= 10000
A 已按非递减顺序排序。

Constraints:

1 <= nums.length <= 104
-104 <= nums[i] <= 104
nums is sorted in non-decreasing order.

/**
 * @param {number[]} nums
 * @return {number[]}
 */
var sortedSquares = function (nums) {
    var B = [];
    //先获取nums数组每一项平方之后的数组B
    for (let i = 0; i < nums.length; i++) {
        B.push(nums[i]*nums[i]);
    }
    //再将B数组进行升序排列
    B.sort(function(a,b){
        return a-b;
    })
    return B;
};