41 lines
1.0 KiB
JavaScript
41 lines
1.0 KiB
JavaScript
'use strict';
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.sortBy = sortBy;
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/*
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* 快速排序，按某个属性，或按“获取排序依据的函数”，来排序.
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* @method soryBy
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* @static
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* @param {array} arr 待处理数组
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* @param {string|function} prop 排序依据属性，获取
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* @param {boolean} desc 降序
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* @return {array} 返回排序后的新数组
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*/
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function sortBy(arr, prop, desc) {
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var props = [],
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ret = [],
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i = 0,
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len = arr.length;
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if (typeof prop == 'string') {
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for (; i < len; i++) {
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var oI = arr[i];
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(props[i] = new String(oI && oI[prop] || ''))._obj = oI;
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}
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} else if (typeof prop == 'function') {
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for (; i < len; i++) {
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var _oI = arr[i];
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(props[i] = new String(_oI && prop(_oI) || ''))._obj = _oI;
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}
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} else {
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throw '参数类型错误';
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}
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props.sort();
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for (i = 0; i < len; i++) {
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ret[i] = props[i]._obj;
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}
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if (desc) ret.reverse();
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return ret;
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}; |