Rails get index of "each" loop

Question

So I have this loop:

<% @images.each do |page| %>

<% end %>

How would I get the index of "page" inside of the loop?

For the info of others looking at this, all the answers supplied are applicable to Ruby in general, not specific to Rails functionality. — Phrogz, Jan 27 '11 at 02:29

score 403 · Accepted Answer · answered Jan 27 '11 at 00:12

403

<% @images.each_with_index do |page, index| %>

<% end %>

answered Jan 27 '11 at 00:12

PreciousBodilyFluids

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Didn't work for me. Had to use the each_with_index method as the other answers suggest. – Erick A. Montañez Mar 04 '19 at 21:58

score 51 · Answer 2 · edited Sep 27 '17 at 00:13

51

The two answers are good. And I also suggest you a similar method:

<% @images.each.with_index do |page, index| %>
<% end %>

You might not see the difference between this and the accepted answer. Let me direct your eyes to these method calls: .each.with_index see how it's .each and then .with_index.

edited Sep 27 '17 at 00:13

Sgnl

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answered Jan 27 '11 at 00:16

Tatsuro Baba

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This method newer and allows you to offset the index (say you wanted to start the loop on item 1 instead of 0 or something like that) – neanderslob Jun 09 '15 at 23:16
2

It took me a while to realise this code wasn't identical to the accepted answer! – mwfearnley Nov 28 '16 at 12:50

score 16 · Answer 3 · answered Jan 27 '11 at 00:13

16

Try each_with_index.

answered Jan 27 '11 at 00:13

Brett Bender

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Rails get index of "each" loop

3 Answers3

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