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26 lines
688 B
26 lines
688 B
8 months ago
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var swap = require('./swap');
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var isSorted = require('./isSorted');
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exports = function(arr) {
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var cmp =
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arguments.length > 1 && arguments[1] !== undefined
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? arguments[1]
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: isSorted.defComparator;
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var len = arr.length;
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var gap = Math.floor(len / 2);
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while (gap > 0) {
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for (var i = gap; i <= len - gap; i++) {
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for (var j = i; j > 0; j -= gap) {
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if (cmp(arr[j], arr[j - gap]) < 0) {
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swap(arr, j, j - gap);
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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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gap = Math.floor(gap / 2);
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}
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return arr;
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};
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module.exports = exports;
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