Class: AjLisp::PrimitiveSubtract

Inherits:
Primitive show all
Defined in:
lib/ajlisp/primitive_subtract.rb

Constant Summary collapse

@@instance = 
nil

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Primitive

#evaluate

Class Method Details

.instance ⇒ Object 



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# File 'lib/ajlisp/primitive_subtract.rb', line 9

def self.instance
    @@instance = new unless @@instance
    return @@instance
end

Instance Method Details

#apply(context, args) ⇒ Object 



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# File 'lib/ajlisp/primitive_subtract.rb', line 14

def apply(context, args)
	result = args.shift
	
	args.each do |arg|
		result -= arg
	end
	
	return result
end