Nested ERB block : Embedded Ruby « Development « Ruby

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3. Embedded Ruby

Nested ERB block

require 'erb'
template = %q{
<% if problems.empty? %>
  it is true
<% else %>
  Here is else
  <% problems.each do |problem, line| %>
    * <%= problem %> on line <%= line %>
  <% end %>
<% end %>}.gsub(/^\s+/, '')

template = ERB.new(template, nil, '<>')

problems = [["Use of is_a? ", 23],
            ["eval() is dangerous", 44]]
template.run(binding)

 

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