Class: Impromptu::OrderedSet

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/impromptu/ordered_set.rb

Direct Known Subclasses

ComponentSet

Instance Method Summary collapse

Constructor Details

#initialize ⇒ OrderedSet

Returns a new instance of OrderedSet.



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# File 'lib/impromptu/ordered_set.rb', line 5

def initialize
  @items_hash = {}
  @items_list = []
end

Instance Method Details

#<<(item) ⇒ Object Also known as: push 



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# File 'lib/impromptu/ordered_set.rb', line 10

def <<(item)
  unless self.include?(item)
    @items_hash[item] = item
    @items_list << item
  end
  @items_hash[item]
end

#delete(item) ⇒ Object 



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# File 'lib/impromptu/ordered_set.rb', line 23

def delete(item)
  self.include?(item) or return nil
  @items_hash.delete(item)
  @items_list.delete(item)
end

#each(&block) ⇒ Object 



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# File 'lib/impromptu/ordered_set.rb', line 37

def each(&block)
  @items_list.each {|item| yield item}
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/impromptu/ordered_set.rb', line 45

def empty?
  @items_list.empty?
end

#include?(item) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/impromptu/ordered_set.rb', line 29

def include?(item)
  @items_hash.has_key?(item)
end

#merge(items) ⇒ Object 



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# File 'lib/impromptu/ordered_set.rb', line 19

def merge(items)
  items.each {|item| self.<< item}
end

#size ⇒ Object 



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# File 'lib/impromptu/ordered_set.rb', line 41

def size
  @items_list.size
end

#to_a ⇒ Object 



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# File 'lib/impromptu/ordered_set.rb', line 33

def to_a
  @items_list.dup
end