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57 lines
1.2 KiB
57 lines
1.2 KiB
/**
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*
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*/
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var ShellSort = function() {
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this.instructions = [];
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};
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ShellSort.prototype = Object.create(Sorter.prototype);
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/**
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*
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*/
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ShellSort.prototype.sort = function(arr) {
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var len = arr.length;
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var gap = Math.floor(len / 3);
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var i, j;
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for (i = 0; i < gap; i++) {
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this.gapSort(arr, i, gap);
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}
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var IS = new InsertionSort();
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IS.sort(arr);
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return arr;
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};
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/**
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*
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*/
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ShellSort.prototype.gapSort = function(arr, start, gap) {
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var i, j;
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var len = arr.length;
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// console.log(`start ${start}, gap ${gap}`)
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for (i = start; i < len; i += gap) {
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// console.log(`i: ${i}`)
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for (j = i; j > start; j -= gap) {
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// console.log(`j: ${j}`)
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// console.log(`checking if ${arr[j - gap].value} > ${arr[j].value}`)
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if (arr[j - gap].value > arr[j].value) {
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// console.log(`swapping ${arr[j - gap].value} and ${arr[j].value}`)
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tmp = arr[j - gap];
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arr[j - gap] = arr[j];
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arr[j] = tmp;
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// console.log(dump(arr));
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}
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else {
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break;
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}
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}
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}
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// console.log(dump(arr));
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};
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