Sha256: 417096780bb27f0346a9a862972fb242d033994dc24896b3a2fb44bb42860436
Contents?: true
Size: 1.25 KB
Versions: 7
Compression:
Stored size: 1.25 KB
Contents
module Kernel
# Tests to see if something has value. An object
# is considered to have value if it is not nil?
# and if it responds to #empty?, is not empty.
#
def val?
return false if nil?
return false if empty? if respond_to?(:empty?)
true
end
# The opposite of #nil?.
#
# "hello".not_nil? # -> true
# nil.not_nil? # -> false
#
# CREDIT Gavin Sinclair
def not_nil?
not nil?
end
# TODO Do not need two of these.
#alias_method :non_nil?, :not_nil?
# Is self included in other?
#
# 5.in?(0..10) #=> true
# 5.in?([0,1,2,3]) #=> false
#
def in?(other)
other.include?(self)
end
end
# _____ _
# |_ _|__ ___| |_
# | |/ _ \/ __| __|
# | | __/\__ \ |_
# |_|\___||___/\__|
#
=begin test
require 'test/unit'
class TestKernelVal < Test::Unit::TestCase
def test_val_1
f = nil
t = 1
assert( ! f.val? )
assert( t.val? )
end
def test_val_2
f = []
t = [1]
assert( ! f.val? )
assert( t.val? )
end
def test_val_3
f = ''
t = '1'
assert( ! f.val? )
assert( t.val? )
end
def test_in?
assert( 5.in?(0..10) )
assert( 5.in?([1,2,3,4,5]) )
end
end
=end
Version data entries
7 entries across 7 versions & 1 rubygems