ruby on rails descending loop increments

Question

How do I descent from 5 to 1 instead of going from 1 to 5? I have this...

<div class="field-container rating">
  <% (5..1).each do |i| %>
  <%= f.radio_button :rating, i, :id => "star#{i}" %>
  <% end %>
</div>

(1..5) goes from 1, 2, 3, 4, 5. What is the correct way of going 5, 4, 3, 2, 1?

Benoît · Accepted Answer · 2013-06-18 03:26:46Z

10

You can do downto

<div class="field-container rating">
  <% 5.downto(1) do |i| %>
  <%= f.radio_button :rating, i, :id => "star#{i}" %>
  <% end %>
</div>

answered Jun 18, 2013 at 3:26

Benoît

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2 Comments

Ah Ruby...this is way better than the Pythonesque suggestion I was about to make (setting a variable, decrementing it in a while loop).

very simple and easy! Thank you!

Jayram · Accepted Answer · 2013-06-18 03:28:36Z

0

You can use to_a.reverse

for i in (1..5).to_a.reverse
   puts i
end

answered Jun 18, 2013 at 3:28

Jayram

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