Edit Question - KnowledgeHub

Title Body

Consider this example Javascript code: a = new Array(); a['a1']='foo'; a['a2']='bar'; b = new Array(2); b['b1']='foo'; b['b2']='bar'; c=['c1','c2','c3']; console.log(a); console.log(b); console.log(c); Results in the Firebug console are as follows: For a (the '[]' had to be expanded by clicking on the '+' button): [] a1 "foo" a2 "bar" For b: [undefined, undefined] For c: ["c1", "c2", "c3"] My questions are: Am I using the array['key']='value' syntax correctly? Why isn't array b working as expected? Why are arrays a and c displayed differently in the console? It also seems that jQuery is unable to iterate through the array a with it's .each() method. Could you reccomend any good tutorials on Javascript array behaviour? NOTE: Google Chrome's Firebug displays only [] for array 'a', without the option to expand it. EDIT: Alright, it seems that arrays in Javascript have only numerical keys, so adding a string as a key name makes an object out of an array. But why doesn't jQuery's .each work with it? $.each(a, function () { alert ('derp'); }) This code, appended to the script, produces no alerts.

Tags (comma-separated) Cancel