jqr

require "thread"

# This is an example of how to use popen in a nonblocking fashion while
# consuming the output and manipulating it slightly. Additionally it ensures
# that the output maintains some consistency even with interleaving writes.

# Make a mutex so that we only let one thing write to stdout at a time
@stdout_mutex = Mutex.new

# A version of puts which shows some debug information, handy for showing off

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def dump_redis(redis, keys)
  values = {}
  keys.each do |key|
    case type = redis.type(key)
    when "hash"
      values[key] = redis.hgetall(key)
    when "set"
      values[key] = Set.new(redis.smembers(key))
    when "list"
      values[key] = redis.lrange(key, 0, -1)

jqr

# When inserting Javascript in HTML there is a a problem with the
# </script> end tag.
# 
# Standard Javascript escaping works fine for most strings, but the 
# browser interprets </script> before Javascript is being parsed, so 
# it needs to be HTML escaped while the browser is parsing, and then
# unescaped as Javascript parses it.

# Regular to_json
{ 'key' => '</script>' }.to_json

jqr

# How I might test this helper

module SomeHelper
  def title(page_title)
    content_for(:title) { page_title }
  end
end

describe SomeHelper
  include SomeHelper

jqr

require 'pathname'
class File
  def self.relative_symlink(old_file, new_file)
    symlink(relative_path(File.dirname(new_file), old_file), new_file)
  end
  
  def self.relative_path(base_path, file)
    Pathname.new(File.expand_path(file)).relative_path_from(Pathname.new(File.expand_path(base_path))).to_s
  end
end

jqr

# http://facets.rubyforge.org/doc/api/core/classes/Array.html#M000145

require 'rubygems'
require 'facets'

class Array
  def permutations(min = 0, max = size + 1)
    variations = []
    (min..max).each do |permutation_size|
      permutation(permutation_size) do |permutation|

jqr

# Re: http://twitter.com/danielmorrison/status/1149336565

require 'rubygems'
require 'httparty'
require 'hpricot'

url = 'http://rubyonrails.org'
document = Hpricot.parse(HTTParty.get(url))

scrape = {

jqr

import os, re

class CachedFileSearch(object):
  """Cached File Search"""
  
  def __init__(self, dir):
    self.dir = dir
    self.all_files = os.popen('find ' + dir).read()
    self.clear_cache()
    

jqr

-- Demonstration of MySQL bug and a work-around.
-- See http://bugs.mysql.com/bug.php?id=36772
-- It is fixed in MySQL 5.0.74

DROP TABLE `test`;
CREATE TABLE `test` (
  `id` INT
);

INSERT INTO `test` VALUES

jqr

module Enumerable
  def group_by_individual
    grouped = {}
    each do |item|
      yield(item).each do |key|
        grouped[key] ||= []
        grouped[key] << item
      end
    end
    grouped