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Contents
#--
# Credit goes to Florian Gross.
#++
module Comparable
# Returns self if above the given lower bound, or
# within the given lower and upper bounds,
# otherwise returns the the bound of which the
# value falls outside.
#
# 4.clip(3) #=> 4
# 4.clip(5) #=> 5
# 4.clip(2,7) #=> 4
# 9.clip(2,7) #=> 7
# 1.clip(2,7) #=> 2
#
def clip(lower, upper=nil)
return lower if self < lower
return self unless upper
return upper if self > upper
return self
end
# Returns the greater of self or x.
#
# 4.cap(5) #=> 4
# 6.cap(5) #=> 5
#
def cap(upper)
(self <= upper) ? self : upper
end
end
# _____ _
# |_ _|__ ___| |_
# | |/ _ \/ __| __|
# | | __/\__ \ |_
# |_|\___||___/\__|
#
=begin test
require 'test/unit'
class TCComparable < Test::Unit::TestCase
def test_clip
assert_equal( 4, 3.clip(4) )
assert_equal( 4, 4.clip(4) )
assert_equal( 5, 5.clip(4) )
assert_equal( 4, 4.clip(3,5) )
assert_equal( 3, 3.clip(3,5) )
assert_equal( 5, 5.clip(3,5) )
assert_equal( 3, 2.clip(3,5) )
assert_equal( 5, 6.clip(3,5) )
assert_equal( 'd', 'd'.clip('c','e') )
assert_equal( 'c', 'c'.clip('c','e') )
assert_equal( 'e', 'e'.clip('c','e') )
assert_equal( 'c', 'b'.clip('c','e') )
assert_equal( 'e', 'f'.clip('c','e') )
end
def test_cap
assert_equal( 3, 3.cap(4) )
assert_equal( 4, 4.cap(4) )
assert_equal( 4, 5.cap(4) )
end
end
=end
Version data entries
26 entries across 26 versions & 1 rubygems