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Interloper adds before and after callback hooks to methods on POROs (plain old Ruby objects).


Add this line to your application’s Gemfile:

ruby gem 'interloper'

And then execute:

$ bundle

Or install it yourself as:

$ gem install interloper


To add before and after callbacks to a method: ```ruby require ‘interloper’

class Foo include Interloper

before(:do_something) { puts “do something before” } before(:do_something) { puts “do something else before” } after(:do_something) { puts “do something after” } after(:do_something) { puts “do something else after” }

def do_something puts “doing it” end end **Output:** do something before do something else before doing it do something after do something else after => nil ```

Callbacks will receive the same arguments as the method being called. ```ruby require ‘interloper’ class Foo include Interloper

before(:do_something) do |x| puts “do something before, with #x” end

def do_something(something) puts “doing it with #something” end end“grace and style”) Output: do something before, with grace and style doing it with grace and style => nil ```


After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to


Bug reports and pull requests are welcome on GitHub at Myers/interloper.