each with index and modulo in ember and handlebar
each, ember.js, handlebars.js, loops
Solution
I have been finding that `index` or `@index` do not work from within the template, but you can access it from within a helper.
I've made an example here that demonstrates this:
http://jsbin.com/egoyay/1/edit
Edit: Adding code to answer, demonstrating `{{else}}` block
Handlebars helper (for non-Ember use):
Handlebars.registerHelper('ifIsNthItem', function(options) {
var index = options.data.index + 1,
nth = options.hash.nth;
if (index % nth === 0)
return options.fn(this);
else
return options.inverse(this);
});
Usage:
<ol>
{{#each model}}
<li>
{{#ifIsNthItem nth=3}}
Index is a multiple of 3
{{else}}
Index is NOT a multiple of 3
{{/ifIsNthItem}}
</li>
{{/each}}
</ol>
Problem
I'm creating a slide - so there's 3 images every one div like so ``` <div> <img /> <img /> <img /> </div> </div> <img /> <img /> <img /> </div> ``` None of the code around the internet works flawlessly - https://github.com/johanpoirier/resthub-backbone-stack/commit/8a318477d56c370d2a0af4da6eae9999c7bb29da http://jaketrent.com/post/every-nth-item-in-handlebars-loop/ http://rockycode.com/blog/handlebars-loop-index/ http://www.arlocarreon.com/blog/javascript/handlebars-js-everyother-helper/ and yes including the answers here in stack overflow. Can anyone provide some code that works perfectly at this current period (version of Ember/Handlebar)? I have an array of models so i'd like to do something like ``` {{#each model}} {{if index % 3 == 0}} {{/if}} {{/each}} ```