pmarreck

cars = 20000.0
avg_salary_per_hr = 40.0
accident_visible_hrs_without_chinook = 1.5
accident_visible_hrs_with_chinook = 0.3
idle_gas_gallons_per_hr = 0.25
gas_cost_per_gal = 4.0

total_cost_of_accident_without_chinook = (cars * avg_salary_per_hr * accident_visible_hrs_without_chinook) +
            (idle_gas_gallons_per_hr * gas_cost_per_gal * accident_visible_hrs_without_chinook)

pmarreck

# Voilà. A way to detect monkeypatches in Ruby.
class Module
  @@_class_instance_method_map = {}
  @@_class_singleton_method_map = {}

  def self.object_space_snapshot
    @@_class_instance_method_map = {}
    @@_class_singleton_method_map = {}
    ObjectSpace.each_object(Module) do |o|
      @@_class_instance_method_map[o] = o.instance_methods(false).map{|m| [m, o.instance_method(m).hash] }

pmarreck

-      facebook_post = FacebookPost.new({:site_id               => feed.site_id,
-                                        :facebook_feed_id      => feed.id,
-                                        :facebook_user_id      => facebook_user.id,
-                                        :facebook_id           => post.post_id,
-                                        :sender_user_id        => nil,
-                                        :from_id               => facebook_user.uid,
-                                        :from_name             => fb_actor.name,
-                                        :message               => (message ? CGI.unescapeHTML(message) : ""),
-                                        :sent_at               => Time.at(post.created_time),
-                                        :data                  => (post.attachment ? post.attachment.to_json : nil),

pmarreck

  def with_caching(on = true)
    existing, Rails.application.config.action_controller.perform_caching = Rails.application.config.action_controller.perform_caching, on
    yield
  ensure
    Rails.application.config.action_controller.perform_caching = existing
  end

pmarreck

# automated git bisecting. because I hate remembering how to use this.
# ex. usage: git_wtf_happened <ruby testfile> <how many commits back, default 10>
function git_wtf_happened {
  git bisect start HEAD HEAD~${2:-10};
  git bisect run ruby $1;
  git bisect view;
  git bisect reset;
}

pmarreck

# Make to_i on a string return nil if there are no actual valid numbers
# or if it doesn't at least start with a number.

String.class_eval do
  unless instance_methods.include?(:to_i_without_nil)
    alias to_i_without_nil to_i
    def to_i_with_nil(base=10)
      if (r=self.to_i_without_nil(base))==0
        if /^[0-9]+/ =~ self
          r

pmarreck

#!/usr/bin/env ruby
#
#  File: git_solution_generator.rb
#  Created by Peter Marreck on 2012-08-03.

class GitSolutionGenerator

  def solutions(n=1, sep=" ")
   (1..n).inject(""){|total,x| total+"#{solution}#{sep}"}
  end

pmarreck

# Some code that lets you quickly erect objects and their attributes with a params hash

class InvalidAutoInitializeParamError < StandardError; end

class Object
  class << self
    alias new_without_auto_initialize new
    def new_with_auto_initialize(*args,&block)
      a1 = args.first

pmarreck

# So you want to find out what is messing with your object somewhere deep in your stack...
# Behold, your on-the-fly tracer...

module NotifyWhen
  def notify_when(*meths, &callback)
    class << self; self; end.instance_eval do
      meths.each do |meth|
        alias_method "unnotified_#{meth}".to_sym, meth
        define_method(meth) do |*args, &block|
          callback.yield(*([meth, args, self][0..callback.arity]))

pmarreck

cat /Users/pmarreck/.rvm/log/ruby-1.9.3-p327/make.log
[2012-11-26 15:21:42] make
	CC = /usr/local/bin/gcc-4.2
	LD = ld
	LDSHARED = /usr/local/bin/gcc-4.2 -dynamiclib
	CFLAGS = -O3 -fno-common -pipe 
	XCFLAGS = -include ruby/config.h -include ruby/missing.h -fvisibility=hidden -DRUBY_EXPORT
	CPPFLAGS = -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE   -I/Users/pmarreck/.rvm/usr/include -I. -I.ext/include/x86_64-darwin11.4.2 -I./include -I.
	DLDFLAGS = -Wl,-undefined,dynamic_lookup -Wl,-multiply_defined,suppress -Wl,-flat_namespace -install_name /Users/pmarreck/.rvm/rubies/ruby-1.9.3-p327/lib/libruby.1.9.1.dylib -current_version 1.9.1 -compatibility_version 1.9.1  -Wl,-u,_objc_msgSend   
	SOLIBS =