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Commitf9a584f

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0977: Squares of a sorted array (#4)
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// let nums = [-4, -1, 0, 3, 10];
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letnums=[-7,-3,2,3,11];
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functionsortedSquaresByMapping(nums:number[]):number[]{
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returnnums.map((i)=>i*i).sort((a,b)=>a-b);
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}
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functionsortedSquaresFromTwoEnds(nums:number[]):number[]{
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constans=newArray(nums.length);
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letleft=0,
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right=nums.length-1;
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for(leti=nums.length-1;i>=0;i--){
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if(Math.abs(nums[left])>Math.abs(nums[right])){
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ans[i]=nums[left]*nums[left];
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left++;
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}else{
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ans[i]=nums[right]*nums[right];
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right--;
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}
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}
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returnans;
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}
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functionsortedSquaresByUnshifting(nums:number[]):number[]{
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constans:number[]=[];
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letleft=0,
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right=nums.length-1;
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while(left<=right){
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if(Math.abs(nums[left])>nums[right]){
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ans.unshift(nums[left]**2);
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left++;
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}else{
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ans.unshift(nums[right]**2);
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right--;
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}
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}
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returnans;
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}
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console.time("sortedSquaresByMapping");
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letresultByMapping=sortedSquaresByMapping(nums);
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console.timeEnd("sortedSquaresByMapping");
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console.time("sortedSquaresFromTwoEnds");
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letresultFromTwoEnds=sortedSquaresFromTwoEnds(nums);
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console.timeEnd("sortedSquaresFromTwoEnds");
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console.time("sortedSquaresByUnshifting");
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letresultByUnshifting=sortedSquaresByUnshifting(nums);
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console.timeEnd("sortedSquaresByUnshifting");
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console.log(resultByUnshifting);
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console.log(resultByMapping);
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console.log(resultFromTwoEnds);
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#977. Squares of a Sorted Array
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Given an integer array`nums` sorted in <b>non-decreasing</b> order, return <i>an array of <b>the squares of each number</b> sorted in non-decreasing order</i>.
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##Example 1:
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><spanstyle="color:white;">Input</span>: nums =[-4, -1, 0, 3, 10]<br>
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><spanstyle="color:white;">Output</span>:[0, 1, 9, 16, 100]<br>
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><spanstyle="color:white;">Explanation</span>: After squaring, the array becomes[16, 1, 0, 9, 100].<br>
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>After sorting, it becomes[0, 1, 9, 16, 100].
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##Example 2:
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><spanstyle="color:white;">Input</span>: nums =[-7, -3, 2, 3, 11]<br>
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><spanstyle="color:white;">Output</span>:[4, 9, 9, 49, 121]
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##Constraints:
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- 1 <= nums.length <= 10<sup>4</sup>
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- -10<sup>4</sup> <= nums[i] <= 10<sup>4</sup>
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-`nums` is sorted in <b>non-decreasing</b> order.

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