50 lines
1.1 KiB
JavaScript
50 lines
1.1 KiB
JavaScript
/*
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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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export function sortBy(arr, prop, desc) {
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let 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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let oI = arr[i];
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(props[i] = new String(oI && oI[prop] || ''))._obj = oI;
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}
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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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let oI = arr[i];
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(props[i] = new String(oI && prop(oI) || ''))._obj = oI;
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}
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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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};
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/**
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* 数组对象排序
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* console.log(arr.sort(compare('age')))
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* @param {} property
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*/
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export function compare(property){
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return function(a,b){
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var value1 = a[property];
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var value2 = b[property];
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return value1 - value2;
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}
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} |