Class: Deterministic::Option

Inherits:
Object
  • Object
show all
Defined in:
lib/deterministic/option.rb

Class Method Summary collapse

Class Method Details

.any?(expr) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/deterministic/option.rb', line 13

def any?(expr)
  to_option(expr) { expr.nil? || not(expr.respond_to?(:empty?)) || expr.empty? }
end

.some?(expr) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/deterministic/option.rb', line 9

def some?(expr)
  to_option(expr) { expr.nil? }
end

.to_option(expr, &predicate) ⇒ Object 



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# File 'lib/deterministic/option.rb', line 17

def to_option(expr, &predicate)
  predicate.call(expr) ? None.new : Some.new(expr)
end

.try! ⇒ Object 



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# File 'lib/deterministic/option.rb', line 21

def try!
  yield rescue None.new
end