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up vote 2 down vote favorite

I have a JsonArray something like this.

var json_array = [{ "text": "id", "size": 4}, { "text": "manifesto", "size": 4}, { "text": "also", "size": 4}, { "text": "leasing", "size": 4}, { "text": "23", "size": 4}];

Is there anyway to get me all the "text" property of this json_array in another array using Javascript/jQuery?

like:

var t_array = ["id","manifesto","also"....]
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4 Answers 4

up vote 8 down vote accepted

You can use $.map() to project the relevant information from your existing array into a new one:

var t_array = $.map(json_array, function(item) {
    return item.text;
});
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Just curious (I don't use jQuery) - is that $.map function asynchronous? –  JKing Apr 11 '12 at 10:24
    
@JKing, nope, it isn't. It builds and returns the array synchronously. The function it takes as an argument is not a callback, it's used to project the items of the new array. –  Frédéric Hamidi Apr 11 '12 at 10:27
    
ah. I've been spending too much time in node.js... every anonymous function passed as an arg to another function makes me think "Weeee! Asynchronous event driven programming!" Thanks for nothing, jQuery! –  JKing Apr 11 '12 at 10:41
    
I love this solution. I learned something. –  Dutchie432 Apr 11 '12 at 13:01
up vote 2 down vote 
var t_array = [];

for (var i=0; i< json_array.length; i++)
    t_array.push(json_array[i].text);
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up vote 1 down vote

I think you'll need to build t_array by looping through json_array

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up vote 1 down vote

something like:

var t_array = [];
$.each(json_array,function(i,o) {
  t_array.push(o.text);
})

http://jsfiddle.net/bouillard/2c66t/

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