There is, in ‘newer’ versions of Javascript: Destructuring assignment – Javascript 1.7. It’s probably only supported in Mozilla-based browsers, and maybe in Rhino. var a = 1; var b = 3; [a, b] = [b, a]; EDIT: actually it wouldn’t surprise me if the V8 Javascript library (and thus Chrome) supports this. But don’t count … Read more
Take a look at nl2br on php.js which seems exactly what you’re looking for. Basically, it’s: function nl2br (str, is_xhtml) { if (typeof str === ‘undefined’ || str === null) { return ”; } var breakTag = (is_xhtml || typeof is_xhtml === ‘undefined’) ? ‘<br />’ : ‘<br>’; return (str + ”).replace(/([^>\r\n]?)(\r\n|\n\r|\r|\n)/g, ‘$1’ + breakTag … Read more
No, it doesn’t have one. For this reason most popular libraries come with one in their utility packages. Check out jQuery’s inArray and Prototype’s Array.indexOf for examples. jQuery’s implementation of it is as simple as you might expect: function inArray(needle, haystack) { var length = haystack.length; for(var i = 0; i < length; i++) { … Read more