tokland

#!/usr/bin/python
#
# See http://stackoverflow.com/questions/1016997/generate-from-generators
#
# Equivalent implementation in Python of this Haskell code:
#    
# grandKids generation kidsFunc val =
#     iterate (concatMap kidsFunc) [val] !! generation

from itertools import chain, islice, imap

tokland

require 'rubygems'
require 'eventmachine'

$stdout.sync = true
$stderr.sync = true

EM.run {
  
  EM.add_periodic_timer(0.1) {
    $stdout.write "stdout\n"

tokland

#!/usr/bin/ruby
# http://code.google.com/codejam/contest/dashboard?c=635101#s=p0
#
# Author: tokland@gmail.com

class Problem
  # Create a directory (as array of slugs) in an existing filesystem and 
  # return the final filesytem and the total creation cost.   
  def self.create_directory(filesystem, slugs)
    if (head = slugs.first)

tokland

#https://gist.github.com/tokland/871431

module Adt
  # Build a ADT parent class with its children constructors.
  #
  #   class_names_with_constructors -- Hash of key=class_name, value=constructor_arguments
  #   class_body -- Body to add to the parent class
  # 
  # Example:
  # 

tokland

# http://www.elpais.com/videos/sociedad/cubo/suma/cero/elpepusoc/20110505elpepusoc_2/Ves/

faces_vertices = [[0,1,2,3], [0,1,4,5], [4,5,6,7], [2,3,6,7], [0,3,4,7], [1,2,5,6]]

vertices_solution = ([+1, -1].repeated_permutation(8)).select do |vertices_values|
  faces_values = faces_vertices.map do |vertices|
    vertices_values.values_at(*vertices).inject(:*)
  end
  (vertices_values + faces_values).inject(:+) == 0
end

tokland

#!/usr/bin/ruby-1.9
require 'set'

class Problem11
  def self.solve(boxes, nails_per_box, weights)
    (1..nails_per_box).to_a.repeated_combination(boxes).select do |combination|
      weights.repeated_permutation(boxes).map do |weights|
        weights.zip(combination).map do |weight, value|
          weight * value
        end.inject(:+)

tokland

# Usage:

# $loopc 3 echo 'hello world'
# hello world
# hello world
# hello world
#
function loopc {
  LIMIT=$1
  shift 1

tokland

_.mixin({
  /* Like extend but get key/values object->key_names */ 
  extend_from: function(object, source_object, key_names) {   
    return _(object).extend(_(source_object).slice(key_names));
  },
  
  /* Return a new object with the merged properties of all objects in arguments */
  merge: function() {
    var objects = arguments;
    return _.reduce(_.rest(objects), function(obj, o) {

tokland

class ActionDispatch::Routing::Mapper
  def localize_and_scope_for(locales, options = {}, &block)
    scoped_locales = locales - Array(options[:skip_scope])

    localized(locales) do
      locale_regexp = Regexp.new(scoped_locales.join('|'))
      scope("/:i18n_locale", :constraints => {:i18n_locale => locale_regexp}) do
        yield
      end
      yield if options[:skip_scope]

tokland

require 'active_record'
require 'arel'

# Ruby-like syntax in AR conditions using the underlying Arel layer (Rails >= 3.0).
#
# What you would usually write like this: 
#
#   User.where(["users.created_at > ? AND users.name LIKE ?", Date.yesterday, "Mary"])
#
# can now be written like this (note those parentheses required by the operators precedences):