class Rinda::Tuple

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.

Public Class Methods

new (ary_or_hash)

Source

# File bundled-src/rinda-0.2.0/lib/rinda/rinda.rb, line 53
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

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

Public Instance Methods

[] (k)

Source

# File bundled-src/rinda-0.2.0/lib/rinda/rinda.rb, line 71
def [](k)
  @tuple[k]
end

Accessor method for elements of the tuple.

each () { |k, v| ... }

Source

# File bundled-src/rinda-0.2.0/lib/rinda/rinda.rb, line 86
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

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

fetch (k)

Source

# File bundled-src/rinda-0.2.0/lib/rinda/rinda.rb, line 78
def fetch(k)
  @tuple.fetch(k)
end

Fetches item k from the tuple.

size ()

Source

# File bundled-src/rinda-0.2.0/lib/rinda/rinda.rb, line 64
def size
  @tuple.size
end

The number of elements in the tuple.

value ()

Source

# File bundled-src/rinda-0.2.0/lib/rinda/rinda.rb, line 96
def value
  @tuple
end

Return the tuple itself

Private Instance Methods

hash? (ary_or_hash)

Source

# File bundled-src/rinda-0.2.0/lib/rinda/rinda.rb, line 102
def hash?(ary_or_hash)
  ary_or_hash.respond_to?(:keys)
end

init_with_ary (ary)

Source

# File bundled-src/rinda-0.2.0/lib/rinda/rinda.rb, line 109
def init_with_ary(ary)
  @tuple = Array.new(ary.size)
  @tuple.size.times do |i|
    @tuple[i] = ary[i]
  end
end

Munges ary into a valid Tuple.

init_with_hash (hash)

Source

# File bundled-src/rinda-0.2.0/lib/rinda/rinda.rb, line 119
def init_with_hash(hash)
  @tuple = Hash.new
  hash.each do |k, v|
    raise InvalidHashTupleKey unless String === k
    @tuple[k] = v
  end
end

Ensures hash is a valid Tuple.