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Versions: 26
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Contents
class Integer
# Is an integer odd?
#
# 2.odd? #=> false
# 3.odd? #=> true
#
def odd?
self % 2 == 1
end
# Is an integer even?
#
# 2.even? #=> true
# 3.even? #=> false
#
def even?
self % 2 == 0
end
# Is is a multiple of a given number?
#
# 7.multiple?(2) #=> false
# 8.multiple?(2) #=> true
#
def multiple?(number)
self % number == 0
end
end
# _____ _
# |_ _|__ ___| |_
# | |/ _ \/ __| __|
# | | __/\__ \ |_
# |_|\___||___/\__|
#
=begin test
require 'test/unit'
class TCInteger < Test::Unit::TestCase
def test_odd?
assert( ! 0.odd? )
assert( 1.odd? )
assert( ! 2.odd? )
assert( 3.odd? )
end
def test_even?
assert( 0.even? )
assert( ! 1.even? )
assert( 2.even? )
assert( ! 3.even? )
end
def test_multiple?
assert( ! 1.multiple?(2) )
assert( 2.multiple?(2) )
assert( ! 5.multiple?(3) )
assert( 6.multiple?(3) )
end
end
=end
Version data entries
26 entries across 26 versions & 1 rubygems