Akdarrah

I wrote a quick script to generate passwords given a master password. This way you only have to remember a single password, and with that password you can generate all of your other passwords. Instructions on how to use this script can be found here: https://github.com/akdarrah/scripts

Here is the script:

require 'rubygems'
require 'digest'
require 'highline/import'
require "backports"

# if char is a letter, capitalize it. if it is a number, replace with a symbol
def alter_char(char)
  symbol_set =  %w(@ # % ^ & * +  ?)
  char.to_i.zero? ? char.to_s.upcase : symbol_set[rand(char.to_s.ord) % symbol_set.size]
end

# replaces about half of the characters with a capital letter or symbol
def format(raw)
  return formatted = "".tap do |formatted|
    raw.each_char do |char|
      formatted_char = (rand(raw.size) % 2).zero? ? alter_char(char) : char.to_s
      formatted.concat formatted_char
    end
  end
end

identifier = ARGV.join("")
secret_key = ask("Password: "){|q| q.echo = false}
srand(secret_key.each_char.map{|c| c.to_s.ord}.sum.to_i)
password = format Digest::MD5.hexdigest(identifier + secret_key)
%x[printf '%s' '#{password}' | pbcopy]
say "Generated password copied to clipboard."

adamdarrah@onebert~/note $ rails console
Notice: for 10x faster LSI support, please install http://rb-gsl.rubyforge.org/
Loading development environment (Rails 3.0.1)
ree-1.8.7-2011.03 :001 > rand
 => 0.279273463333317 
ree-1.8.7-2011.03 :002 > rand
 => 0.216048229607135 
ree-1.8.7-2011.03 :003 > rand
 => 0.300257519246147 
ree-1.8.7-2011.03 :004 > exit
adamdarrah@onebert~/note $ rails console
Notice: for 10x faster LSI support, please install http://rb-gsl.rubyforge.org/
Loading development environment (Rails 3.0.1)
ree-1.8.7-2011.03 :001 > rand
 => 0.426064545572545 
ree-1.8.7-2011.03 :002 > rand
 => 0.756376225221752 
ree-1.8.7-2011.03 :003 > rand
 => 0.259909140308626

adamdarrah@onebert~/note $ rails console
Notice: for 10x faster LSI support, please install http://rb-gsl.rubyforge.org/
Loading development environment (Rails 3.0.1)
ree-1.8.7-2011.03 :001 > srand(999)
 => 28212304341349319917058999759470316901167389175548446547334060628152746438732 
ree-1.8.7-2011.03 :002 > rand
 => 0.803428040079688 
ree-1.8.7-2011.03 :003 > rand
 => 0.527522295682645 
ree-1.8.7-2011.03 :004 > rand
 => 0.119111465028212 
ree-1.8.7-2011.03 :005 > exit
adamdarrah@onebert~/note $ rails console
Notice: for 10x faster LSI support, please install http://rb-gsl.rubyforge.org/
Loading development environment (Rails 3.0.1)
ree-1.8.7-2011.03 :001 > srand(999)
 => 5153426315139723512360796695679417744676510232904009578147330885438135587813 
ree-1.8.7-2011.03 :002 > rand
 => 0.803428040079688 
ree-1.8.7-2011.03 :003 > rand
 => 0.527522295682645 
ree-1.8.7-2011.03 :004 > rand
 => 0.119111465028212 

# Model code

before_save :before_save_callback_method

def before_save_callback_method
  self.name = "derp"
end

# Model Spec code

describe '#before_save_callback_method' do
  
  # test that the callback is called...
  it "should call before_save_callback_method before a save" do
    @model = stub_model(Model)
    @model.stub!(:valid?).and_return(true)
    @model.should_receive(:before_save_callback_method).and_return(false)
    @model.save
  end
  
  # test your method works...
  it "should set name of model to 'derp'" do
    @model = stub_model(Model, :name => "")
    @model.before_save_callback_method
    @model.name.should == "derp"
  end
  
end

@model.should_receive(:before_save_callback_method).and_return(false)

After the model receives the before_save_callback_method method, it returns false and doesn’t go through with the save.

EDIT: It turns out you can access the list of callbacks a rails model has defined. So instead of testing the behavior of rails, which is already tested, we can just make sure that our callback is in the list of defined callbacks (Thanks to @andyfleener for pointing this out).

# test that the callback is called...
it "should call before_save_callback_method before a save" do
  @model = stub_model(Model)
  @model.stub!(:valid?).and_return(true)
  @model.should_receive(:before_save_callback_method).and_return(false)
  @model.save
end

# test that the callback is called...
it "should have before_save_callback_method defined as a before_save callback" do
  Model._save_callbacks.select { |cb| cb.kind.eql?(:before) }.map(&:raw_filter).include?(:before_save_callback_method).should == true
end

Here’s a quick script I wrote to hide comment threads on reddit.com in which the original author of the submission has not participated in. It will work for any subreddit, but I think this script will be most useful in the IAMA subreddit since I personally only read comments if I see that there is a response by the IAMA submitter. To use the script, simply paste the following javascript code into the url box of your browser and hit enter.

javascript:$(".thing.comment").each(function(){if($(this).parents(".child").length == 0){if($(this).find(".submitter").length == 0){$(this).hide();}}}); void(0);