Class: J8::Predicate

Inherits:
Object show all
Includes:
Common
Defined in:
lib/j8/predicate.rb

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Common

callable_from_proc, from_callable, from_callable_class, initialize, lambda?, make_lambda, raise_unless_lambda

Class Method Details

.equal?(target) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/j8/predicate.rb', line 7

def self.equal?(target)
  J8::Predicate.new(->(o) { o == target })
end

Instance Method Details

#and(other = nil, &block) ⇒ Object 



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# File 'lib/j8/predicate.rb', line 19

def and(other = nil, &block)
  callable = from_callable(other, block)

  J8::Predicate.new(->(o) { test(o) && callable.test(o) })
end

#negate ⇒ Object 



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# File 'lib/j8/predicate.rb', line 15

def negate
  J8::Predicate.new(->(o) { !test(o) })
end

#or(other = nil, &block) ⇒ Object 



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# File 'lib/j8/predicate.rb', line 25

def or(other = nil, &block)
  callable = from_callable(other, block)

  J8::Predicate.new(->(o) { test(o) || callable.test(o) })
end

#test(o) ⇒ Object 



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# File 'lib/j8/predicate.rb', line 11

def test(o)
  @callable.call(o)
end