Module: Axiom::Function::Predicate::Enumerable

Included in:
Exclusion, Inclusion
Defined in:
lib/axiom/function/predicate/enumerable.rb

Overview

A mixin for predicates matching an enumerable

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.compare_method(enumerable) ⇒ Symbol

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Return the method to test the enumerable with

Parameters:

  • enumerable (#cover?, #include?)

Returns:

  • (Symbol) 


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# File 'lib/axiom/function/predicate/enumerable.rb', line 17

def self.compare_method(enumerable)
  enumerable.respond_to?(:cover?) ? :cover? : :include?
end

Instance Method Details

#call(tuple) ⇒ Boolean

Evaluate the enumerable function using the tuple

Examples:

enumerable.call(tuple)  # => true or false

Parameters:

  • tuple (Tuple) —

    the tuple to pass to #call in the left and right operands

Returns:

  • (Boolean) 


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# File 'lib/axiom/function/predicate/enumerable.rb', line 46

def call(tuple)
  util = self.class
  util.call(
    util.extract_value(left, tuple),
    right.map { |entry| util.extract_value(entry, tuple) }
  )
end

#initialize(left, right) ⇒ undefined

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Initialize an Enumerable predicate

Parameters:

  • left (Object) —

    the attribute or object to test for in the Enumerable

  • right (Enumerable) —

    the enumerable to test

Returns:

  • (undefined) 


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# File 'lib/axiom/function/predicate/enumerable.rb', line 31

def initialize(left, right)
  super(left, freeze_object(right))
end