December 2013
Intermediate to advanced
384 pages
9h 54m
English
Content preview from jQuery and JavaScript Phrasebook
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Iterating Through Object Properties
var obj = {first:"Bilbo", last:"Baggins", title:"Hobbit"}; for (var key in obj){ document.write(key + "=" + obj[key] + "&"); }
JavaScript provides an additional type of option in the for() loop. Using the in keyword, you can iterate through the values in an array or the properties in an object. The syntax is for( var name in object){LOOP_BLOCK}. The name is assigned the property name inside the LOOP_BLOCK.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.