taq

<?php
   class A {
      public static $name = null;
   }
   A::$name = "a";

   class B extends A {
   }
   B::$name = "b";

taq

class Pessoa
   include Comparable
   attr_accessor :nome

   def initialize(nome)
      self.nome = nome
   end

   def <=>(outra)
      return -1 if outra.size<self.nome.size

taq

class Pessoa
   attr_accessor :nome

   def initialize(nome)
      self.nome = nome
   end

   def ==(outra)
      outra == self.nome
   end   

taq

#!/bin/bash
 
if ! which md5sum > /dev/null; then
	echo Install md5sum
	exit 1
fi
 
if ! which curl > /dev/null; then
	echo Install curl
	exit 1

taq

require "benchmark"
include Benchmark

values = (0..1000).to_a

bm(10) do |bench|
   bench.report("regular") do
      values.map { |x| x * 10 }.select { |x| x > 30 } 
   end
   bench.report("lazy") do

taq

require "benchmark"
include Benchmark

values = (0..100).to_a

bm(10) do |bench|
   bench.report("regular") do
      values.map { |x| x * 10 }.select { |x| x > 30 } 
   end
   bench.report("lazy") do

taq

natural_numbers = Enumerator.new do |yielder|
  number = 1
  loop do
    yielder.yield number
    number += 1
  end
end

p natural_numbers.lazy.select { |n| n.odd? }.take(5).to_a # => [1, 3, 5, 7, 9]
p natural_numbers.lazy.map    { |n| n*2    }.take(5).to_a # => [2, 4, 6, 8, 10]

taq

natural_numbers = Enumerator.new do |yielder|
  number = 1
  loop do
    yielder.yield number
    number += 1
  end
end

p natural_numbers.select { |n| n.odd? }.take(5).to_a 

taq

regexp = /^([A-Z])?[a-z]+(?(1)[A-Z]|[a-z])$/

p regexp =~ "foo"   #=> 0
p regexp =~ "foO"   #=> nil
p regexp =~ "FoO"   #=> 0

taq

module TimeExtensions
  refine Fixnum do
    def minutes; self * 60; end
  end
end

class MyApp
  using TimeExtensions
  def initialize
    p 2.minutes