/usr/lib/ruby/1.8/ramaze/snippets/ramaze/struct.rb is in libramaze-ruby1.8 2010.06.18-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | # Copyright (c) 2008 Michael Fellinger m.fellinger@gmail.com
# All files in this distribution are subject to the terms of the Ruby license.
module Ramaze
class Struct < ::Struct
# Makes it possible to access the keys directly by their name, not only
# their index. The original Struct#values_at tries to call #to_int on the
# arguments.
# in Ruby < 1.9 this would lead to a quite unintuitive IndexError, while
# in 1.9 it will say outright that it cannot convert Symbol into Integer.
# I think this is neither useful nor expected, so we extend
# Struct#values_at to recognize valid members of the Struct passed into
# the method and return their values in the same order, just like
# Hash#values_at.
#
# Example:
# Point = Struct.new(:x, :y)
# point = Point.new(15, 10)
#
# # Old behaviour:
# point.values_at(0, 1)
# # => [15, 10]
# point.values_at(0..1)
# # => [15, 10]
# point.values_at(:y, :x)
# # => IndexError: offset 20697 too large for struct(size:2)
#
# # Added new behaviour:
# point.values_at(:y, :x)
# # => [10, 15]
def values_at(*keys)
keys.map do |key|
case key
when String, Symbol
self[key]
else
return super
end
end
end
end
end
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