I am new to Rails and I am using Ruby version 1.9.3 and Rails version 3.0.0.
I want to print an array in Rails. How do I do that?
For example, we have to use print_r to print an array in PHP:
<?php $a = array ('a' => 'apple', 'b' => 'banana', 'c' => array ('x', 'y', 'z')); print_r ($a); ?> Output:
<pre> Array ( [a] => apple [b] => banana [c] => Array ( [0] => x [1] => y [2] => z ) ) </pre> How do I print an array in Rails?
You can use inspect like:
@a = ['a', 'b'] p @a #['a', 'b'] Or:
p @a.inspect #"[\"a\", \"b\"]" 
You need to use awesome_print gem.
require 'awesome_print' hash = {:a=>1,:b=>2,:c => [1,2,3]} ap hash output:
{ :a => 1, :b => 2, :c => [ [0] 1, [1] 2, [2] 3 ] } It depends on what you want to use the array for.
To blindly output an array in a view, which has to be in a view, you should use debug and inspect like this:
<%= @array.inspect() %> <%= debug @array %> However, if you want to iterate through an array, or do things like explode(), you'll be better suited using the Ruby array functions.
You've got a couple of options here. I'm assuming you're doing this in an ERB template.
This will convert the array to YAML and print it out surrounded in <pre> tags
<%= debug [1,2,3,4] %> And this will print it out formatted in a readable Ruby syntax:
<pre><%= [1,2,3,4].inspect %></pre> Check out "Debugging Rails Applications" for more info.
<%= debug array %>or<%= array.inspect %>