61 lines
1.5 KiB
JavaScript
61 lines
1.5 KiB
JavaScript
var startWith = require('./startWith');
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var root = require('./root');
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var toStr = require('./toStr');
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exports = function(arr) {
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return arr.sort(naturalOrderComparator);
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};
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function naturalOrderComparator(a, b) {
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a = toStr(a);
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b = toStr(b);
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if (startWith(a, '_') && !startWith(b, '_')) {
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return 1;
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}
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if (startWith(b, '_') && !startWith(a, '_')) {
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return -1;
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}
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var chunk = /^\d+|^\D+/;
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var chunka, chunkb, anum, bnum;
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while (true) {
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if (a) {
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if (!b) {
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return 1;
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}
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} else {
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if (b) {
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return -1;
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}
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return 0;
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}
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chunka = a.match(chunk)[0];
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chunkb = b.match(chunk)[0];
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anum = !root.isNaN(chunka);
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bnum = !root.isNaN(chunkb);
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if (anum && !bnum) {
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return -1;
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}
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if (bnum && !anum) {
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return 1;
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}
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if (anum && bnum) {
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var diff = chunka - chunkb;
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if (diff) {
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return diff;
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}
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if (chunka.length !== chunkb.length) {
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if (!+chunka && !+chunkb) {
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return chunka.length - chunkb.length;
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}
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return chunkb.length - chunka.length;
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}
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} else if (chunka !== chunkb) {
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return chunka < chunkb ? -1 : 1;
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}
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a = a.substring(chunka.length);
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b = b.substring(chunkb.length);
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}
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}
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module.exports = exports;
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