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Ruby Currying

http://www.khelll.com/blog/ruby/ruby-currying/

by batasrki • 17 years ago

10 4 17 years ago

KH

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4

raganwald• 17 years ago

As mentioned elsewhere, is this currying? Or partial application?

Currying:

lambda { |x,y| x + y }.curry => lambda { |x| lambda { |y| x + y } }

Partial Application

lambda { |x, y| x + y }.apply(2) => lambda { |y| 2 + y }

And given #curry, #apply is trivial:

class Proc; def apply(param); self.curry.call(param); end end

...or at least, that's my understanding...

grandalf2• 17 years ago

i think you're right.

grandalf2• 17 years ago

After learning about these concepts in Haskell, the Ruby code seems downright ugly (I never thought I'd say that)... but still probably quite useful in some cases.

khelll• 17 years ago

raganwald, u r totally right, i have updated the post to show the diff.

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khelll.com

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