block-container-iterator.rb

#
# require_relative 'words_from_string'
# require 'test/unit'
#
# class TestWordsFromString < Test::unit::Testcase
#   def test_empty_string
#     assert_equal(
#     [], words_from_string("")
#     )
#     assert_equal(
#     [], words_from_string("    ")
#     )
#   end
#   def test_single_word
#     assert_equal(
#     ["cat"], words_from_string("cat")
#     )
#     assert_equal(
#     ["cat"], words_from_string("  cat  ")
#     )
#   end
#   def test_many_woords
#     assert_equal(
#     ["the", "cat", "sat", "on", "the", "mat"],
#     words_from_string("the cat sat on the mat")
#     )
#   end
#   def test_ignores_punctutation
#     assert_equal(
#     ["the", "cat's", "mat"],
#     words_from_string("<the!> cat's, -mat-")
#     )
#   end
# end
#
def to_max(max)
  i1, i2 = 1, 1
  while i1 <= max
      yield i1
      i1, i2 = i2, i1+i2
  end
end

# to_max(21){
#   |f| print f, " "
# }
# puts

class Array
  def find
    each do |value|
      return value if yield(value)
    end
    nil
  end
end
# tes = Array.new
# puts tes.find