masassiez

require './strange_case.rb'

strange_case( "1" )       # => true
strange_case( :"1" )      # => true
strange_case( 1 )         # => true
strange_case( [1, 2, 3] ) # => false
strange_case( {"1"=>1} )  # => true
strange_case( (1..3) )    # => false
strange_case( /.*/ )      # => false
strange_case( Fixnum )    # => false

masassiez

file = "Gemfile"

# ?e：ファイルが存在する
test( ?e, file )  # => true

# ?z：ファイルサイズが 0 である
test( ?z, file )  # => false

# ?s：ファイルサイズが 0 でない (ファイルサイズを返す、0 ならば nil) -> Integer|nil
test( ?s, file )  # => 63

masassiez

require "bundler/setup"
require "sicuro"

TIMELIMIT = 1
MEMLIMIT  = 1

Sicuro.setup(TIMELIMIT, MEMLIMIT)

common = <<CODE
def assert_equal(x, y, message = nil)

masassiez

def prime_factorization(num)

  prime =  Enumerator.new do |y|
    mem = []
    is_prime = lambda { |e| mem.find { |_| e.gcd(_) != 1 } }
    2.upto(num) do |n|
      unless is_prime[n]
        mem << n
        y << n
      end

masassiez

class Object
  def tap
    block_given? ? super : self
  end
end

class Array
  def dupli 
    self.group_by(&:tap).reject{ |k, v| v.one? }.keys
  end

masassiez

puts 1.upto(100).with_object(nil)
                .map { |n, o| ( o ||= [] ) << :Fizz if n % 3 == 0; [n, o] }
                .map { |n, o| ( o ||= [] ) << :Buzz if n % 5 == 0; [n, o] }
                .map { |n, o| ( o || [n] ) * "" }

masassiez

class Pythagorean
  
  def initialize(n)
    @sticks  = [ *1 .. ( { 0 => 15 }[n] || n ) ]
    @triples = @sticks.map(&:to_f).combination(3)
  end

  def triples
    @triples.select( &theorem ).map { |e| e.map(&:to_i) }
  end

masassiez

# ruby 1.8.7 only
# 前日のTimeオブジェクトを取得する

## パターン１：Timeクラスに Time#prev_day を追加
class Time

  def next_day( n = 1, reset = true )
    time = self + 60 * 60 * 24 * n
    _hour, _min, _sec = reset ? [ 0, 0, 0 ] : [ hour, min, sec ]
    Time.local( time.year, time.month, time.day, _hour, _min, _sec )

masassiez

cache = { 0 => 0, 1 => 1 }
fib = lambda {_fib_ = lambda {|n| cache[n] ||= _fib_[n-2] + _fib_[n-1] } }.call
(1..100000).each { |e| fib[e] }

__END__
ruby 1.8.7 (2011-12-28 patchlevel 357) [i386-mingw32]

Rehearsal ------------------------------------------------------------
** benchmarking 'fib.rb'   2.156000   0.469000   2.625000 (  2.734410)
--------------------------------------------------- total: 2.625000sec

masassiez

def fizzbuzz(limit)
  e ||= 0
  ( e += 1 ) > limit ? return : raise
rescue lambda { |_| e%15==0 }
  puts "FizzBuzz"; retry
rescue lambda { |_| e%5==0 }
  puts "Buzz"; retry
rescue lambda { |_| e%3==0 }
  puts "Fizz"; retry
rescue lambda { |_| e }