each_with_index_do starting at 1 for index

Question

I am using a ruby iterator on a view in a rails app like so:

<% ([email protected]).each_with_index do |element, index| %>   ... <% end %> 

I thought the addition of the 1.. instead of just saying: @document.data

would get the trick of having the index above start at 1. But alas, the above code index is still 0 to data.length (-1 effectively). So what am I doing wrong, i need the index to equal 1-data.length...no clue how to set up the iterator to do this.

Answer 1

Unless you're using an older Ruby like 1.8 (I think this was added in 1.9 but I'm not sure), you can use each.with_index(1) to get a 1-based enumerator:

In your case it would be like this:

<% @document.data.length.each.with_index(1) do |element, index| %>   ... <% end %> 

Hope that helps!