Proc

Proc objects are blocks of code that have been bound to a set of local variables. Once bound, the code may be called in different contexts and still access those variables.

def gen_times(factor)
 return Proc .new  {|n| n*factor }
end
times3 = gen_times(3)
times5 = gen_times(5)
times3.call (12) #=> 36
times5.call (5) #=> 25
times3.call (times5.call (4)) #=> 60

Related methods