Class: Rinda::Template
Relationships & Source Files | |
Super Chains via Extension / Inclusion / Inheritance | |
Class Chain:
self,
Tuple
|
|
Instance Chain:
self,
Tuple
|
|
Inherits: |
Rinda::Tuple
|
Defined in: | lib/rinda/rinda.rb |
Overview
Templates are used to match tuples in ::Rinda.
Class Method Summary
Instance Method Summary
-
#===(tuple)
Alias for #match.
-
#match(tuple)
Matches this template against
tuple
.
Tuple - Inherited
#[] | Accessor method for elements of the tuple. |
#each | Iterate through the tuple, yielding the index or key, and the value, thus ensuring arrays are iterated similarly to hashes. |
#fetch | Fetches item |
#size | The number of elements in the tuple. |
#value | Return the tuple itself. |
#hash?, | |
#init_with_ary | Munges |
#init_with_hash | Ensures |
Constructor Details
This class inherits a constructor from Rinda::Tuple
Instance Method Details
#===(tuple)
Alias for #match.
# File 'lib/rinda/rinda.rb', line 170
def ===(tuple) match(tuple) end
#match(tuple)
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
# File 'lib/rinda/rinda.rb', line 149
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