Odd and even number comparison helper for Handlebars

Question

I am trying to find a way to parse out differently depending array index as odd or even number

I was looking at this http://assemble.io/helpers/helpers-comparison.html and hope to find something like this:

{{#each array}}
{{#if_odd {{@index}}}}
    {{this}} is odd 
{{else}}
    {{this}} is even
{{/if_odd}}
{{/each}}

I don't really care about the syntax but hope my idea comes across. Any help? Thanks.

Solution

I created this helper and it worked

Handlebars.registerHelper('if_even', function(conditional, options) {
  if((conditional % 2) == 0) {
    return options.fn(this);
  } else {
    return options.inverse(this);
  }
});

Just followed conditional helper here http://handlebarsjs.com/block_helpers.html

I tried to do this based on mu is too short suggestion:

{{#if_even @index}}