Init commit, seems to work well :D

.gitignore

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+/.bundle/
+/.yardoc
+/Gemfile.lock
+/_yardoc/
+/coverage/
+/doc/
+/pkg/
+/spec/reports/
+/tmp/
+*.bundle
+*.so
+*.o
+*.a
+mkmf.log

.rspec

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+--color
+--format progress

Gemfile

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+source 'https://rubygems.org'
+
+# Specify your gem's dependencies in feeling_lucky.gemspec
+gemspec

LICENSE.txt

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+Copyright (c) 2014 Shervin Aflatooni
+
+MIT License
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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+# FeelingLucky
+
+TODO: Write a gem description
+
+## Installation
+
+Add this line to your application's Gemfile:
+
+```ruby
+gem 'feeling_lucky'
+```
+
+And then execute:
+
+    $ bundle
+
+Or install it yourself as:
+
+    $ gem install feeling_lucky
+
+## Usage
+
+TODO: Write usage instructions here
+
+## Contributing
+
+1. Fork it ( https://github.com/[my-github-username]/feeling_lucky/fork )
+2. Create your feature branch (`git checkout -b my-new-feature`)
+3. Commit your changes (`git commit -am 'Add some feature'`)
+4. Push to the branch (`git push origin my-new-feature`)
+5. Create a new Pull Request

Rakefile

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+require "bundler/gem_tasks"
+
+require "rspec/core/rake_task"
+RSpec::Core::RakeTask.new('spec') do |t|
+  t.verbose = true
+end
+
+
+task :default => [:spec]

feeling_lucky.gemspec

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+# coding: utf-8
+lib = File.expand_path('../lib', __FILE__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+require 'feeling_lucky/version'
+
+Gem::Specification.new do |spec|
+  spec.name          = "feeling_lucky"
+  spec.version       = FeelingLucky::VERSION
+  spec.authors       = ["Shervin Aflatooni"]
+  spec.email         = ["[email protected]"]
+  spec.summary       = %q{Hate NoMethodErrors? Are you feeling lucky?.}
+  spec.description   = %q{Do you hate spelling mistakes? Did you forget what you called that method or attribute? Feeling lucky will fix that for you!}
+  spec.homepage      = ""
+  spec.license       = "MIT"
+
+  spec.files         = `git ls-files -z`.split("\x0")
+  spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
+  spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
+  spec.require_paths = ["lib"]
+
+  spec.add_dependency "interception"
+
+  spec.add_development_dependency "bundler", "~> 1.7"
+  spec.add_development_dependency "rake", "~> 10.0"
+  spec.add_development_dependency "rspec"
+end

lib/feeling_lucky.rb

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+require 'feeling_lucky/version'
+
+module Levenshtein
+  # This code is based directly on the Text gem implementation
+  # Returns a value representing the "cost" of transforming str1 into str2
+  # taken from https://github.com/threedaymonk/text/blob/master/lib/text/levenshtein.rb
+  def distance(str1, str2)
+    n = str1.length
+    m = str2.length
+    return m if n.zero?
+    return n if m.zero?
+
+    d = (0..m).to_a
+    x = nil
+
+    str1.each_char.with_index(1) do |char1, i|
+      str2.each_char.with_index do |char2, j|
+        cost = (char1 == char2) ? 0 : 1
+        x = min3(
+          d[j+1] + 1, # insertion
+          i + 1,      # deletion
+          d[j] + cost # substitution
+        )
+        d[j] = i
+        i = x
+      end
+      d[m] = x
+    end
+
+    x
+  end
+  module_function :distance
+
+  private
+
+  def min3(a, b, c) # :nodoc:
+    if a < b && a < c
+      a
+    elsif b < c
+      b
+    else
+      c
+    end
+  end
+  module_function :min3
+end
+
+def threshold(word)
+  (word.size * 0.3).ceil
+end
+
+class Object
+  def method_missing(meth, *args, &block)
+    all_methods = self.methods + self.singleton_methods
+    meth_str    = meth.to_s
+    threshold   = threshold(meth_str)
+    good_methods = all_methods.select {|word| Levenshtein.distance(meth_str, word.to_s) <= threshold }
+    if good_methods.length > 0
+      puts "#{self.class}:: for #{meth} picked #{good_methods.first}"
+      begin
+        self.send(good_methods.first, *args, &block)
+      rescue Exception => e
+        super
+      end
+    else
+      super
+    end
+  end
+end
+
+module FeelingLucky
+end
+
+

lib/feeling_lucky/version.rb

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+module FeelingLucky
+  VERSION = "0.0.1"
+end

spec/feeling_lucky/feeling_lucky_spec.rb

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+require 'spec_helper'
+
+describe 'Feeling Lucky' do
+  it 'doesnt effect working methods' do
+    expect("hello".upcase).to eq("HELLO")
+  end
+
+  it 'corrects spelling mistakes' do
+    expect("hello".uppcase).to eq("HELLO")
+  end
+end

spec/spec_helper.rb

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+require 'feeling_lucky'
+
+RSpec.configure do |config|
+  config.order = 'random'
+end