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Class: Rinda::Tuple

Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Subclasses:
Template
Inherits: Object
Defined in: lib/rinda/rinda.rb

Overview

A tuple is the elementary object in ::Rinda programming. Tuples may be matched against templates if the tuple and the template are the same size.

Class Method Summary

Instance Method Summary

Constructor Details

.new(ary_or_hash) ⇒ Tuple

Creates a new Tuple from ary_or_hash which must be an Array or Hash.

[ GitHub ] 

  


# File 'lib/rinda/rinda.rb', line 51



def initialize(ary_or_hash)
  if hash?(ary_or_hash)
    init_with_hash(ary_or_hash)
  else
    init_with_ary(ary_or_hash)
  end
end


  







Instance Method Details



  

    #[](k)  
  



  

    

Accessor method for elements of the tuple.


  



  [ GitHub ]


  

  


# File 'lib/rinda/rinda.rb', line 69



def [](k)
  @tuple[k]
end


  








  

    #each  
  



  

    

Iterate through the tuple, yielding the index or key, and the value, thus ensuring arrays are iterated similarly to hashes.


  



  [ GitHub ]


  

  


# File 'lib/rinda/rinda.rb', line 84



def each # FIXME
  if Hash === @tuple
    @tuple.each { |k, v| yield(k, v) }
  else
    @tuple.each_with_index { |v, k| yield(k, v) }
  end
end


  








  

    #fetch(k)  
  



  

    

Fetches item k from the tuple.


  



  [ GitHub ]


  

  


# File 'lib/rinda/rinda.rb', line 76



def fetch(k)
  @tuple.fetch(k)
end


  








  

    #hash?(ary_or_hash)  ⇒ Boolean  (private)
  



  

    
  





  


  [ GitHub ]


  

  


# File 'lib/rinda/rinda.rb', line 100



def hash?(ary_or_hash)
  ary_or_hash.respond_to?(:keys)
end


  








  

    #init_with_ary(ary)   (private)
  



  

    

Munges ary into a valid Tuple.


  



  [ GitHub ]


  

  


# File 'lib/rinda/rinda.rb', line 107



def init_with_ary(ary)
  @tuple = Array.new(ary.size)
  @tuple.size.times do |i|
    @tuple[i] = ary[i]
  end
end


  








  

    #init_with_hash(hash)   (private)
  



  

    

Ensures hash is a valid Tuple.


  



  [ GitHub ]


  

  


# File 'lib/rinda/rinda.rb', line 117



def init_with_hash(hash)
  @tuple = Hash.new
  hash.each do |k, v|
    raise InvalidHashTupleKey unless String === k
    @tuple[k] = v
  end
end


  








  

    #size  
  



  

    

The number of elements in the tuple.


  



  [ GitHub ]


  

  


# File 'lib/rinda/rinda.rb', line 62



def size
  @tuple.size
end


  








  

    #value  
  



  

    

Return the tuple itself


  



  [ GitHub ]


  

  


# File 'lib/rinda/rinda.rb', line 94



def value
  @tuple
end