Wes Bailey wbailey
wbailey
/ tourist_irb_session_1.rb
Created
January 26, 2011 22:58
An example irb session to learn how a piece of code that is using meta-programming works
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| wesbailey@feynman:~/playground> irb -r neverwritecodelikethis | |
| ruby-1.9.2-p0 > space = Hash.new(0) | |
| => {} | |
| ruby-1.9.2-p0 > ObjectSpace.each_object(self.class) {|o| space[o.class] += 1} | |
| => 10349 | |
| ruby-1.9.2-p0 > space.keys | |
| => [String, RubyToken::TkIDENTIFIER,..., NeverWriteCodeLikeThis, ... , RubyToken::TkNL, RubyToken::TkRBRACE, ArgumentError] | |
| ruby-1.9.2-p0 > |
wbailey
/ 00_create_schema_migrations.down.sql
Created
February 8, 2011 10:47
For when you want migrations that are just straight sql files. This is useful when creating databases for working with partner data and matching your data to it another database that is for a rails app.
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| drop table if exists schema_migrations; |
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| require 'yaml' | |
| require 'logger' | |
| require 'active_record' | |
| namespace :db do | |
| def create_database config | |
| options = {:charset => 'utf8', :collation => 'utf8_unicode_ci'} | |
| create_db = lambda do |config| | |
| ActiveRecord::Base.establish_connection config.merge('database' => nil) |
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| # usage: array_merge.rb --data_file=filename --limits=10,20,30 | |
| require 'rubygems' | |
| require 'vr_script' | |
| require 'benchmark' | |
| include Benchmark | |
| class Array | |
| def to_hash_using_inject_push( use_array ) | |
| Hash[*(0 .. self.size).inject( [] ) { |r,i| r.push( self[i], use_array[i] ) }] |
wbailey
/ backreference.rb
Created
March 10, 2011 21:08
Using a back reference in the regular expression definition
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| ruby-1.9.2-p136 > 'asdf asdf--asdf asdf-asdf'.gsub(/( |-)( |-)?/, '_') | |
| => "asdf_asdf_asdf_asdf_asdf" | |
| ruby-1.9.2-p136 > 'asdf asdf--asdf asdf-asdf'.gsub(/( |-)\1?/, '_') | |
| => "asdf_asdf_asdf_asdf_asdf" |
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| wesbailey@feynman:~/tmp/code_katas> bundle install | |
| Using ZenTest (4.4.2) | |
| ... | |
| Using bundler (1.0.10) | |
| Your bundle is complete! Use `bundle show [gemname]` to see where a bundled gem is installed. |
wbailey
/ gist:890033
Created
March 28, 2011 05:11
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| kata "Awesome Exercise" do | |
| [...] | |
| end |
wbailey
/ gist:890034
Created
March 28, 2011 05:15
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| wesbailey@feynman:~/code_katas> kata take sample.rb | |
| Awesome Exercise Kata |
wbailey
/ gist:890042
Created
March 28, 2011 05:32
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| module Kata | |
| module Base | |
| describe "DSL" do | |
| before :each do | |
| @summary = 'sample summary' | |
| [...] | |
| end | |
| describe "#kata" do | |
| [...] |
wbailey
/ stdout_helper.rb
Created
March 28, 2011 05:55
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| require 'stringio' | |
| def capture_stdout | |
| $stdout = StringIO.new | |
| $stdin = StringIO.new("y\n") | |
| yield | |
| $stdout.string.strip | |
| ensure | |
| $stdout = STDOUT | |
| $stdin = STDIN |