Ruby » Ruby master

Feature #7939

Updated by nobu (Nobuyoshi Nakada) about 11 years ago

=begin 
 I really like the new "(({assuming}))" "assuming" method used for currying in Perl 6. 

 For example if I loose my mind and implement ((%fizzbuzz%)) fizzbuzz via currying I can do it like this: 

   

 fb = ->(modulo_number, message, x) { message if x % modulo_number == 0 } 
   
 fizzbuzz = fb.curry[15,"FizzBuzz"] 
   
 fizz = fb.curry[3, "Fizz"] 
   
 buzz = fb.curry[5, "Buzz"] 
   
 (1..100).each { |i| puts fizzbuzz[i] || fizz[i] || buzz[i] || i } 

 Here the first hurdle is that curry is somewhat mathematical, and the secons is that you need to use (({[]})) [] for function invoking... 
 If we had something similar to this: 

   

 class Proc 
     
   def assuming(*args) 
       
     curry.call *args 
     end 
   end 
 end 

 It could be written more naturally IMO: 

   

 fb = ->(modulo_number, message, x) { message if x % modulo_number == 0 } 
   
 fizzbuzz = fb.assuming(15,"FizzBuzz") 
   
 buzz = fb.assuming(5, "Buzz") 
   
 fizz = fb.assuming(3,"Fizz") 

   

 (1..100).each { |i| puts fizzbuzz[i] || fizz[i] || buzz[i] || i } 
 =end 
 

Back