I want to create a select tag using rails collection_select or options_for_select with the items of an array which are not model based. The value of the option should be the array index of each item.

Example: desired output for ['first', 'second', 'third']:

<select id="obj_test" name="obj[test]">
    <option value="0">first</option> 
    <option value="1">second</option> 
    <option value="2">third</option> 
</select>
ruby-on-rails html-select
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