This page contains automated test results for code from O'Reilly's Ruby Cookbook. If this code looks interesting or useful, you might want to buy the whole book.

Generating Random Numbers
CodeExpectedActual
rand
 0.517297883846589 0.517297883846589 
rand
 0.946962603814814 0.946962603814814 
rand(5)
 0 0 
rand(5)
 4 4 
rand(5)
 3 3 
rand(1000)
 39 39 
a = ['item1', 'item2', 'item3']
a[rand(a.size)]
 "item3" "item3" 
m = { :key1 => 'value1',
      :key2 => 'value2',
      :key3 => 'value3' }
values = m.values
values[rand(values.size)]
 "value1" "value1" 
def random_word
 letters = { ?v => 'aeiou',
             ?c => 'bcdfghjklmnprstvwyz' }
  word = ''
  'cvcvcvc'.each_byte do |x|
    source = letters[x]
    word << source[rand(source.length)].chr
  end
  return word
end
random_word
 "josuyip" "josuyip" 
random_word
 "haramic" "haramic" 
#Some random numbers based on process number and current time
rand(1000)
 187 187 
rand(1000)
 551 551 
rand(1000)
 911 911 
#Start the seed with the number 1
srand 1
rand(1000)
 37 37 
rand(1000)
 235 235 
rand(1000)
 908 908 
#Reset the seed to its previous state
srand 1
rand(1000)
 37 37 
rand(1000)
 235 235 
rand(1000)
 908 908