php usort数据排序 与javascript的数组排序

2016-06-28 13:59:00
hainuo
原创 1727
今天在写一个api发现这样的情况PHP中处理的脚本比较复杂,虽然增加一个排序耗时很短,但是考虑到以后大量并发的情况所以想将它放到手机端使用js进行排序php中如下操作```phpusort($data,function($a,$b){if($a['uptime']==$b['uptime'])return 0;return ($a['uptime']>$b['uptime'])?-1:1;});```js中经过试验发现如下也可以用```javascriptdata.sort(function (a, b) { if (a.uptime == b.uptime) return 0; return (a.uptime > b.uptime) ? -1 : 1; })```有一个伙计发现一个超级有趣的事情。大神将 php的许多方法移植到js中http://locutus.io/php/ 大家可以到这里来查看对于usort方法大神将js中的用法与PHP中的用法处理成相同方式于是在js中引入脚本```javascriptmodule.exports = function usort (inputArr, sorter) { // discuss at: http://locutus.io/php/usort/ // original by: Brett Zamir (http://brett-zamir.me) // improved by: Brett Zamir (http://brett-zamir.me) // note 1: This function deviates from PHP in returning a copy of the array instead // note 1: of acting by reference and returning true; this was necessary because // note 1: IE does not allow deleting and re-adding of properties without caching // note 1: of property position; you can set the ini of "locutus.sortByReference" to true to // note 1: get the PHP behavior, but use this only if you are in an environment // note 1: such as Firefox extensions where for-in iteration order is fixed and true // note 1: property deletion is supported. Note that we intend to implement the PHP // note 1: behavior by default if IE ever does allow it; only gives shallow copy since // note 1: is by reference in PHP anyways // example 1: var $stuff = {d: '3', a: '1', b: '11', c: '4'} // example 1: usort($stuff, function (a, b) { return (a - b) }) // example 1: var $result = $stuff // returns 1: {0: '1', 1: '3', 2: '4', 3: '11'} var valArr = [] var k = '' var i = 0 var sortByReference = false var populateArr = {} if (typeof sorter === 'string') { sorter = this[sorter] } else if (Object.prototype.toString.call(sorter) === '[object Array]') { sorter = this[sorter[0]][sorter[1]] } var iniVal = (typeof require !== 'undefined' ? require('../info/ini_get')('locutus.sortByReference') : undefined) || 'on' sortByReference = iniVal === 'on' populateArr = sortByReference ? inputArr : populateArr for (k in inputArr) { // Get key and value arrays if (inputArr.hasOwnProperty(k)) { valArr.push(inputArr[k]) if (sortByReference) { delete inputArr[k] } } } try { valArr.sort(sorter) } catch (e) { return false } for (i = 0; i < valArr.length; i++) { // Repopulate the old array populateArr[i] = valArr[i] } return sortByReference || populateArr}```我们就可以使用 ```javascriptusort($data,function (a, b) { if(a.uptime==b.uptime)return 0;return (a.uptime> b.uptime)?-1:1;});```so good subject!!!
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