JavaScript array_flip
Return array with key <-> value flipped
1 2 3 4 56 7 8 9 1011 12 13 14 1516 17 18 | function array_flip (trans) { // Return array with key <-> value flipped // // version: 1109.2015 // discuss at: http://phpjs.org/functions/array_flip // + original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net) // + improved by: Pier Paolo Ramon (http://www.mastersoup.com/) // * example 1: array_flip( {a: 1, b: 1, c: 2} ); // * returns 1: {1: 'b', 2: 'c'} var key, tmp_ar = {}; for (key in trans) { if (!trans.hasOwnProperty(key)) {continue;} tmp_ar[trans[key]] = key; } return tmp_ar; } |
Examples
Running
1 | array_flip( {a: 1, b: 1, c: 2} ); |
Should return
1 | {1: 'b', 2: 'c'} |
Dependencies
No dependencies, you can use this function standalone.
Open syntax issues
php.js uses JsLint to help us keep our code consistent and prevent some common bugs.
Eventually we want all code to pass or at least take into consideration most fixes suggested by JsLint, following this JsLint configuration we’ve decided on.
Authors
Thanks to the following developers, you get to have array_flip goodness in JavaScript.
Pier Paolo Ramon
15 Jul '11 
You should check if it's a property of the object, with hasOwnProperty.
[CODE]
for (key in trans) {
if (!trans.hasOwnProperty(key)) continue;
tmp_ar[trans[key]] = key;
}
[CODE]
Brett Zamir
20 Jul '11