Each binding

For iteration over objects, you can use .each

{{ _items.each do |item| }}
  <p>{{ item }}</p>
{{ end }}

Above, if _items is an array, the block will be rendered for each item in the array, setting item to the value of the array element.

You can also call .each_with_index to place the index in a local variable within the block

{{ _items.each_with_index do |item, index| }}
  <p>{{ index }}. {{ item }}</p>
{{ end }}

For the array: ['one', 'two', 'three'] this would print:

0. one
1. two
2. three

You can do {{ index + 1 }} to correct the zero offset.

When items are removed or added to the array, the each binding automatically and intelligently adds or removes the items from/to the DOM.

With Index

Each bindings support .each_with_index

{{ _items.each_with_index do |item, index| }}
    <p>{{ index }}. {{ item.name }}</p>
{{ end }}

Current Limitations

Currently .each in bindings is rather limited (we're working on it). It can only handle arrays, not hashes. To use hashes, convert them to arrays first. Also, it can only take one argument (except when using .each_with_index).