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grep -o  regexp filename

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SIXTYTWO = ('0'..'9').to_a + ('a'..'z').to_a + ('A'..'Z').to_a

def to_s_62(i)
...

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class String
  unless ''.respond_to?(:to_proc)
    def to_proc(&block)
...

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require 'rubygems'
require 'active_support'

...

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$c = []
def fork_reality(*l)
  callcc {|c| $c << c }
...

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# in helper 

  TIME_REMAINING_TODAY =  {
...

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primes = Array.new(nil, ceiling + 1)

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(1..500).map {rand(10 ** 16).to_s.rjust(16,'0')}

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# Converts:
# {:hash => [{:foo => 1}, {:foo => 2}]}
# 
...

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def self.find_left_sibling( parent_id, cat_name )
    parent = Category.find( :first, 
                            :conditions => [ "id = ?", parent_id] )
...

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x < lower ? lower : x > upper ? upper : x

# Or should I just go this way:
...

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def show_value_or_default(object, default = "-")
  return default if object.nil?
  tmp = yield(object)  
...

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class Integer
  PR = [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47]
  def is_prime?
...

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require 'benchmark'
include Math

...

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class Array
  def pick
    at rand(size)
...