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Contents
# Copyright, 2015, by Samuel G. D. Williams. <http://www.codeotaku.com>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
require 'forwardable'
module Teapot
# Very similar to a set but uses a specific callback (defaults to &:name) for object identity.
class IdentitySet
include Enumerable
def initialize(contents = [])
@table = {}
contents.each do |object|
add(object)
end
end
def freeze
@table.freeze
super
end
def initialize_dup(other)
@table = other.table.dup
end
def identity(object)
object.name
end
attr :table
def add(object)
@table[identity(object)] = object
end
alias << add
def delete(object)
@table.delete(identity(object))
end
def include?(object)
@table.include?(identity(object))
end
def each(&block)
@table.each_value(&block)
end
extend Forwardable
def_delegators :@table, :size, :empty?, :clear, :count, :[], :to_s, :inspect
end
end
Version data entries
21 entries across 21 versions & 1 rubygems