[Ruby] On Given a hash of variables, render an ERB template

2008-04-12T17:34:10-07:00

require "erb"

class Hash
  def to_binding(object = Object.new)
    object.instance_eval("def binding_for(#{keys.join(",")}) binding end")
    object.binding_for(*values)
  end
end

class Document
  def initialize(template)
    @template = ERB.new(template)
  end
  
  def interpolate(replacements = {})
    @template.result(replacements.to_binding)
  end
end

puts Document.new("Name: <%= first %> <%= last %>").interpolate(:first => "Mislav", "last" => "Marohnic")
# Name: Mislav Marohnic

Sam Stephenson

[Ruby] On Given a hash of variables, render an ERB template