how to create a complex javascript structure

Question

i want to create a structure like that:

[{title:'Imágenes', extensions:'jpg,gif,png'}, {title:'Todos', extensions:'*'}]

but i need to create it from a string, in this way (in "js+jquery+php rare mode"):

items = 'Imágenes jpg,gif,png|Todos *'.split('|').each(function() {
 list(title, ext) = explode(' ', $this);
 filters[] = array('title' => title, 'ext' => ext);
});

i found structures like:

var theStatus = new Object();
function testIt() {
 theStatus.Home = 'mouseover';
 theStatus['Place'] = 'click';
 for (var i in theStatus)
 {
 alert('theStatus[\''+i+'\'] is ' + theStatus[i])
 }
}

and like:

$.alerts = {
 verticalOffset: -75,
 horizontalOffset: 0,
 repositionOnResize: true,
 overlayOpacity: .01,
 overlayColor: '#FFF'
}

but i cant do nothing functional.

Thanks in advance.

Answer 1

This is how I would do it:

items = 'Imágenes jpg,gif,png|Todos *'.split("|").map(function (itemString) {
 var parts = itemString.split(" ");
 return { title: parts[0], extensions: parts[1] };
});

Or you can do this if you use jQuery and need to support older browsers:

items = $.map('Imágenes jpg,gif,png|Todos *'.split("|"), function () {
 var parts = this.split(" ");
 return { title: parts[0], extensions: parts[1] };
});

• GregL: You forgot the .split('|') on the first line, and the native Javascript Array.map() function is only compatible with newer browsers.
• KaptajnKold: Fixed. And it is super easy to add map, reduce etc. to the Array prototype in browsers that don't support them natively. Those methods are so useful, that I would recommend anyone to always do that. There's a project on GitHub called ES5 Shim that does just that.
• DavidB: this way works too, and seems to be a bit more cool :) i'll try the "map" way in various browsers so i can see if they support this, anyway, the GregL's way will be a generic solution for me :) thanks from spain!!
• KaptajnKold: map doesn't work in IE8 and below. If you need to support that, you can either use the jQuery solution or you can include github.com/kriskowal/es5-shim or you can use GregL's solution.
• DavidB: ok, i only need ff, chrome y safari (for the designers), the jquery variant is the best for me, es5-shim is more than i need. In the other hand, i save this question and es5-shim link for the future. i had a problem, now i have a solution. thanks very much again!

Answer 2

Your pseudocode is close.

Try the following vanilla javascript:

var str = 'Imágenes jpg,gif,png|Todos *';
var objs = str.split('|');
var objects = [];
for (var i = 0; i < objs.length; i++) {
 var parts = objs[i].split(' ');
 objects.push({ title: parts[0], extensions: parts[1] });
}
// objects is now an array of custom objects in the format you specified.