/
current.js
44 lines (42 loc) · 1.21 KB
/
current.js
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module.exports = function current(arr) {
// discuss at: https://locutus.io/php/current/
// original by: Brett Zamir (https://brett-zamir.me)
// note 1: Uses global: locutus to store the array pointer
// example 1: var $transport = ['foot', 'bike', 'car', 'plane']
// example 1: current($transport)
// returns 1: 'foot'
const $global = typeof window !== 'undefined' ? window : global
$global.$locutus = $global.$locutus || {}
const $locutus = $global.$locutus
$locutus.php = $locutus.php || {}
$locutus.php.pointers = $locutus.php.pointers || []
const pointers = $locutus.php.pointers
const indexOf = function (value) {
for (let i = 0, length = this.length; i < length; i++) {
if (this[i] === value) {
return i
}
}
return -1
}
if (!pointers.indexOf) {
pointers.indexOf = indexOf
}
if (pointers.indexOf(arr) === -1) {
pointers.push(arr, 0)
}
const arrpos = pointers.indexOf(arr)
const cursor = pointers[arrpos + 1]
if (Object.prototype.toString.call(arr) === '[object Array]') {
return arr[cursor] || false
}
let ct = 0
for (const k in arr) {
if (ct === cursor) {
return arr[k]
}
ct++
}
// Empty
return false
}