Class: OrderedSet

Inherits:
BlankSlate show all
Defined in:
lib/ramaze/snippets/ordered_set.rb

Overview

Basically an Set, but with Order, ain’t that obivous?

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ OrderedSet

Create new instances, optionally pass the first set



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# File 'lib/ramaze/snippets/ordered_set.rb', line 9

def initialize(*args)
  if args.size == 1
    @set = args.shift
  else
    @set = *args
  end

  @set ||= []
  @set = [@set] unless ::Array === @set
  @set.uniq!
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(meth, *args, &block) ⇒ Object

Delegate everything, but controlled, keep elements unique. Warning, this is not really atomic.



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# File 'lib/ramaze/snippets/ordered_set.rb', line 23

def method_missing(meth, *args, &block)
  case meth.to_s
  when /push|unshift|\<\</
    @set.delete(*args)
  when '[]='
    @set.map! do |e|
      if ::Array === args.last
        args.last.include?(e) ? nil : e
      else
        args.last == e ? nil : e
      end
    end
  end
  @set.__send__(meth, *args, &block)
ensure
  @set.compact! if meth == :[]=
end