Batman.js data-foreach with index.

example.html

<!-- Show the <hr /> if the `account.viewIndex` is greater than `0` -->
<!-- Note: The `gt` function is a custom filter I made, see the `helpers.js.coffee` file -->

<div data-foreach-account="currentUser.accounts | withIndex">
  <hr data-showif="account.viewIndex | gt 0" />
  <span data-bind="account.email"></span>
</div>

helpers.js.coffee

Batman.mixin Batman.Filters,

  withIndex: (input) ->
    return input unless input
    index = -1
    input.forEach (data) -> data.set("viewIndex", index += 1)
    input

  gt: (input, value) -> input > value