Handlebars “forEach” helper. See http://stackoverflow.com/questions/11479094/conditional-on-last-item-in-array-using-handlebars-js-template for more information.

forEach.coffee

Handlebars.registerHelper 'forEach', (array, options) ->
  return options.inverse @ if (options.inverse && !array.length)

  array.map((item, index) ->
    item.$index = index
    item.$first = index is 0
    item.$last  = index is array.length - 1

    options.fn item
  ).join ''