Backbone - iterating over objects in an array attribute

Question

I have a model with two arrays, bright and normal. Each array includes objects which are representing colors. I want to implement in model a method allowing to set some properties (for example hue) of this colors. So I wrote this:

setHue: function(hue) {
    _.each([this.get('brigth'), this.get('normal')], function(colors) {
        _.each(colors, function(color) {
            color.setHue(hue + this.getHue());
        });
    });
},

I think it's clear - I try to iterate over every color in both bright and normal arrays. And it doesn't update colors inside these arrays. This color inside _.each seems to have a new value, but it looks it's only a copy of color, not a reference. Do anyone know how to do what I want? I mean with _.each loop, I don't wanna mess up with for, length and indexes.

YES! Thank you! "The darkest place is under the candlestick". normal was loging me proper values inside a loop, and I was checking bright after all. — ciembor
– ciembor, Commented Aug 17, 2012 at 2:58

James Woodruff · Accepted Answer · 2012-08-18 01:59:34Z

1

Bright is misspelled. You entered brigth.

answered Aug 18, 2012 at 1:59

James Woodruff

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Comments

schacki · Accepted Answer · 2012-08-20 22:54:56Z

0

Hm, I think you have a general problem here. Let's try with an example:

this.get('brigth')

will return an array, not a model, correct?

If so,

_.each([this.get('brigth'), this.get('normal')], function(colors) { ...

will loop over an array of arrays, i.e. colors will get an array, not a model nor a collection. Consequently, color will be a item of an array (I assume a string). Thus color with not have a method setHue.

Additionally, Paul is right as well this.getHue() this does not refer to a model, since you are switching context twice (once for each each-Loop). I hope I did not get it totally wrong here.

edited Aug 20, 2012 at 22:54

answered Aug 17, 2012 at 8:11

schacki

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