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Contents
# Copyright, 2014, 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_relative '../session' module Utopia module Session # A simple hash table which fetches it's values only when required. class LazyHash def initialize(&block) @changed = false @values = nil @loader = block end attr :values def [] key load![key] end def []= key, value values = load! if values[key] != value values[key] = value @changed = true end return value end def include?(key) load!.include?(key) end def delete(key) load! @changed = true if @values.include? key @values.delete(key) end def changed? @changed end def load! @values ||= @loader.call end end end end
Version data entries
41 entries across 41 versions & 1 rubygems