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Contents
class Array
# Returns the middle element of an array, or the element offset
# from middle if the parameter is given. Even-sized arrays,
# not having an exact middle, return the middle-right element.
#
# [1,2,3,4,5].mid #=> 3
# [1,2,3,4,5,6].mid #=> 4
# [1,2,3,4,5,6].mid(-1) #=> 3
# [1,2,3,4,5,6].mid(-2) #=> 2
# [1,2,3,4,5,6].mid(1) #=> 5
#
# In other words, If there are an even number of elements the
# higher-indexed of the two center elements is indexed as
# orgin (0).
def mid(offset=0)
self.at( (self.length / 2) + offset )
end
end
# _____ _
# |_ _|__ ___| |_
# | |/ _ \/ __| __|
# | | __/\__ \ |_
# |_|\___||___/\__|
#
=begin test
require 'test/unit'
class TCArray < Test::Unit::TestCase
def test_mid
a = [1,2,3,4,5]
b = [1,2,3,4,5,6]
assert_equal( 3, a.mid )
assert_equal( 4, b.mid )
assert_equal( 4, a.mid(1) )
assert_equal( 5, b.mid(1) )
assert_equal( 6, b.mid(2) )
assert_equal( 3, b.mid(-1) )
end
end
=end
Version data entries
26 entries across 26 versions & 1 rubygems