Class Rinda::Template
In: rinda/rinda.rb
Parent: Tuple

Templates are used to match tuples in Rinda.

Methods

===   match  

Public Instance methods

Alias for match.

[Source]

# File rinda/rinda.rb, line 169
    def ===(tuple)
      match(tuple)
    end

Matches this template against tuple. The tuple must be the same size as the template. An element with a nil value in a template acts as a wildcard, matching any value in the corresponding position in the tuple. Elements of the template match the tuple if the are #== or #===.

  Template.new([:foo, 5]).match   Tuple.new([:foo, 5]) # => true
  Template.new([:foo, nil]).match Tuple.new([:foo, 5]) # => true
  Template.new([String]).match    Tuple.new(['hello']) # => true

  Template.new([:foo]).match      Tuple.new([:foo, 5]) # => false
  Template.new([:foo, 6]).match   Tuple.new([:foo, 5]) # => false
  Template.new([:foo, nil]).match Tuple.new([:foo])    # => false
  Template.new([:foo, 6]).match   Tuple.new([:foo])    # => false

[Source]

# File rinda/rinda.rb, line 148
    def match(tuple)
      return false unless tuple.respond_to?(:size)
      return false unless tuple.respond_to?(:fetch)
      return false unless self.size == tuple.size
      each do |k, v|
        begin
          it = tuple.fetch(k)
        rescue
          return false
        end
        next if v.nil?
        next if v == it
        next if v === it
        return false
      end
      return true
    end

[Validate]