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Contents
class Range
# Returns a two element array of the relationship
# between two Ranges.
#
# Diagram:
#
# Relationship Returns
#
# self |-----------|
# r |-----------| [0,0]
#
# self |-----------|
# r |---------| [-1,-1]
#
# self |---------|
# r |-----------| [1,1]
#
# self |-----------|
# r |----------| [-1,0]
#
# self |-----------|
# r |-----------| [-1,1]
#
# etc.
#
# Example:
#
# (0..3).umbrella(1..2) #=> [-1,-1]
#
def umbrella(r)
s = self.first <=> r.first
e = r.last <=> self.last
return s,e
end
end
# _____ _
# |_ _|__ ___| |_
# | |/ _ \/ __| __|
# | | __/\__ \ |_
# |_|\___||___/\__|
#
=begin test
require 'test/unit'
class TCRange < Test::Unit::TestCase
def test_umbrella
assert_equal( [1,1], (3..6).umbrella(2..7) )
assert_equal( [0,1], (3..6).umbrella(3..7) )
assert_equal( [-1,1], (3..6).umbrella(4..7) )
assert_equal( [1,0], (3..6).umbrella(2..6) )
assert_equal( [0,0], (3..6).umbrella(3..6) )
assert_equal( [-1,0], (3..6).umbrella(4..6) )
assert_equal( [1,-1], (3..6).umbrella(2..5) )
assert_equal( [0,-1], (3..6).umbrella(3..5) )
assert_equal( [-1,-1], (3..6).umbrella(4..5) )
end
end
=end
Version data entries
26 entries across 26 versions & 1 rubygems