Sha256: 4d8ccbaa9c9c7272b218dce9c5590f62af424379a88689d792d6644b07896970
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Versions: 22
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Contents
require 'facet/array/last'
class Array
# Change the first element.
#
# a = ["a","y","z"]
# a.first = "x"
# p a #=> ["x","y","z"]
#
def first=(x)
self[0] = x
end
# Alias for shift, which removes and returns
# the first element in an array.
#
# a = ["a","y","z"]
# a.first! #=> "a"
# p a #=> ["y","z"]
#
alias_method( :first!, :shift)
# Change the last element.
#
# a = [1,2,5]
# a.last = 3
# p a #=> [1,2,3]
#
def last=(x)
self[-1] = x
end
# Alias for pop, which removes and returns
# the last element in an array.
#
# a = [1,2]
# a.last! 3
# p a #=> [1,2,3]
#
alias_method( :last!, :pop)
end
# _____ _
# |_ _|__ ___| |_
# | |/ _ \/ __| __|
# | | __/\__ \ |_
# |_|\___||___/\__|
#
=begin test
require 'test/unit'
class TCArray < Test::Unit::TestCase
def test_first_eq
a = [1,2]
a.first = 0
assert_equal( [0,2], a )
end
def test_first!
a = [1,2,3]
assert_equal( 1, a.first! )
assert_equal( [2,3], a )
end
def test_last_eq
a = [1,2]
a.last = 3
assert_equal( [1,3], a )
end
def test_last!
a = [1,2,3]
assert_equal( 3, a.last! )
assert_equal( [1,2], a )
end
end
=end
Version data entries
22 entries across 22 versions & 1 rubygems