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Contents
#--
# As suggested by Ara T. Howard
#++
module Kernel
# Returns true is an object is class TrueClass,
# otherwise false.
#
# true.true? #=> true
# false.true? #=> false
# nil.true? #=> false
#
def true?
(true == self)
end
# Returns true is an object is class FalseClass,
# otherwise false.
#
# true.false? #=> false
# false.false? #=> true
# nil.false? #=> false
#
def false?
(false == self)
end
# Returns true is an object is class TrueClass
# or FalseClass, otherwise false.
#
# true.bool? #=> true
# false.bool? #=> true
# nil.bool? #=> false
#
def bool?
(true == self or false == self)
end
end
# _____ _
# |_ _|__ ___| |_
# | |/ _ \/ __| __|
# | | __/\__ \ |_
# |_|\___||___/\__|
#
=begin test
require 'test/unit'
class TCKernel < Test::Unit::TestCase
def test_false?
assert( false.false? )
assert( (1 == 2).false? )
assert( ! (1 == 1).false? )
end
def test_true?
assert( true.true? )
assert( (1 == 1).true? )
assert( ! (1 == 2).true? )
end
def test_bool?
assert_equal( true, true.bool? )
assert_equal( true, false.bool? )
assert_equal( false, nil.bool? )
assert_equal( false, 0.bool? )
end
end
=end
Version data entries
16 entries across 16 versions & 1 rubygems