40 lines
832 B
JavaScript
40 lines
832 B
JavaScript
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'use strict';
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var nestedValue = require('../helpers/nestedValue');
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var _require = require('../helpers/is'),
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isFunction = _require.isFunction;
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module.exports = function sortBy(valueOrFunction) {
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var collection = [].concat(this.items);
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var getValue = function getValue(item) {
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if (isFunction(valueOrFunction)) {
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return valueOrFunction(item);
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}
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return nestedValue(item, valueOrFunction);
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};
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collection.sort(function (a, b) {
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var valueA = getValue(a);
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var valueB = getValue(b);
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if (valueA === null || valueA === undefined) {
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return 1;
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}
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if (valueB === null || valueB === undefined) {
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return -1;
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}
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if (valueA < valueB) {
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return -1;
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}
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if (valueA > valueB) {
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return 1;
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}
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return 0;
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});
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return new this.constructor(collection);
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};
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