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Contents
# 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
Version data entries
44 entries across 44 versions & 5 rubygems