CODEWITHSUNDEEP
javascriptjquerybackbone.js
user1721049
user1721049

Reputation:

Set variable value as key in backbone.js

I couldn't add the variable value as my key name in backbone.js is there any way to do this ?? look at the code below 

(function ($) {

    Today = Backbone.Model.extend({ 
    }); 
    var data= ['a','b','c'];
    for(var i=0;i<data.length;i++){
          today.set({i:data[i]});
    } 


} (jQuery));

how i am able to do that ?

Upvotes: 1

Views: 1620

Answers (2)

Jonathan Lonowski
Jonathan Lonowski

Reputation: 123443

You should be able to simply pass data to today.set().

var data = ['a','b','c'];

var today = new Today();
today.set(data);

console.log(today.attributes);
// {0: "a", 1: "b", 2: "c"}

Though, to explain the problem: Identifiers on the left-hand of : in Object literals always become the key's name themselves. To use a variable's value as a key, you have to use bracket member operators.

var tmp = {};
tmp[i] = data[i];
today.set(tmp);

Upvotes: 4

Peter Lyons
Peter Lyons

Reputation: 146014

So in javascript an object literal with unquoted key uses the string version of that key:

var i=1;
var obj = {i: "this sets obj.i to this string, not obj['1']"};

If you want a computed key, follow this pattern:

var keyname = i + 'whatever' + 42;
var obj = {};
obj[keyname] = value;

Upvotes: 0

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