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uasort.js
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uasort.js
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module.exports = function uasort(inputArr, sorter) {
// discuss at: https://locutus.io/php/uasort/
// original by: Brett Zamir (https://brett-zamir.me)
// improved by: Brett Zamir (https://brett-zamir.me)
// improved by: Theriault (https://github.com/Theriault)
// 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 $sorter = function (a, b) { if (a > b) {return 1;}if (a < b) {return -1;} return 0;}
// example 1: var $fruits = {d: 'lemon', a: 'orange', b: 'banana', c: 'apple'}
// example 1: uasort($fruits, $sorter)
// example 1: var $result = $fruits
// returns 1: {c: 'apple', b: 'banana', d: 'lemon', a: 'orange'}
const valArr = []
let k = ''
let i = 0
let sortByReference = false
let populateArr = {}
if (typeof sorter === 'string') {
sorter = this[sorter]
} else if (Object.prototype.toString.call(sorter) === '[object Array]') {
sorter = this[sorter[0]][sorter[1]]
}
const 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([k, inputArr[k]])
if (sortByReference) {
delete inputArr[k]
}
}
}
valArr.sort(function (a, b) {
return sorter(a[1], b[1])
})
for (i = 0; i < valArr.length; i++) {
// Repopulate the old array
populateArr[valArr[i][0]] = valArr[i][1]
}
return sortByReference || populateArr
}