knugie

# switching identities in order to use multiple github accounts on one computer, you have to:

# add to ~/.ssh/config according to current github user:
  
  Host github.com
    IdentityFile ~/.ssh/<rsa_id_for_current_user>


# set git user globally or locally according to current github user:
  git config --local user.name "My Name"

knugie

ary = [['a', :hello], ['b', :foo], ['b', :bar], ['b', :baz], ['a', :world]]

# QUIZ:
#   How do you sort "ary" so equal objects stay in the same relative order to each other?
#   "ary" should be sorted by the first element of each entry.
#   Try now: http://tryruby.org/

expected = [['a', :hello], ['a', :world], ['b', :foo], ['b', :bar], ['b', :baz]]

# HINT:

knugie

/*jslint browser: true, indent: 2 */
(function () {
  'use strict';
  var rgb, style, idx = 0, store = {}, tiles = document.getElementById('box').childNodes;
  for (idx; idx < tiles.length; idx += 1) {
    rgb = tiles[idx].style.backgroundColor.split("(")[1].split(")")[0].split(",");
    store[Math.sqrt(Math.pow(rgb[0], 2), Math.pow(rgb[2], 2), Math.pow(rgb[2], 2))] = tiles[idx];
  }
  style = Object.keys(store).map(function (key) { return [key, store[key]]; }).
    sort(function (a, b) { return parseInt(a[0], 10) < parseInt(b[0], 10) ? 1 : -1; })[0][1].style;

knugie

/* Render Showoff presentation to png or pdf.
   For PNG output:
   * Install
       - phantomjs
   * Run
       $> showoff serve &
       $> phantomjs ./path/to/showoff2png.js
   This will create one png image file per slide.

 * For PDF output:

knugie

#!/usr/bin/env ruby

# git_reports.rb
# print git statistics of users' commits and added/deleted lines of code
# simply run "ruby git_reports.rb" in a git repository

puts "git log --numstat --no-merges"

# retrieve data
log = %x"git log --numstat --no-merges"

knugie

require 'benchmark'

class Bunch
  def self.mark(&block)
    
    first = Bunch.realtime(&block)

    vs = {:first => first}
    class << vs
      def vs(&block)

knugie

module One
  def a(*)
    puts 'One...'
    super
  end
end

module Two
  def a(*)
    puts 'Two...'

knugie

#Lookup Tables, http://en.wikipedia.org/wiki/Lookup_table
#Memoization, http://en.wikipedia.org/wiki/Memoization

require 'benchmark'
###########################################################
# Fibonacci number, http://en.wikipedia.org/wiki/Fibonacci_number
def fib(n)
  n < 2 ? 1 : fib(n-2) + fib(n-1)
end

knugie

#!/usr/bin/env sh

# Rename all file in the current directory according to their file creation date
# For jpegs the file date will be set according to its EXIF data
# e.g. 
#     "20130628_014218.txt" not renamed
#     "test.TXT" => "20130628_002938.txt"
# file extensions will be lower case

jhead -ft -dt -autorot -exonly -n%Y%m%d_%H%M%S *.[Jj][Pp][Gg]

knugie

require 'openssl'
require 'digest/sha2'

# Config
alg = "AES-256-CBC"

# Key
key = OpenSSL::Cipher::Cipher.new(alg).random_key

# Init Digest