From: Robert Klemme <shortcutter@...>
Date: 2009-12-07T18:13:46+09:00
Subject: Re: closures

2009/11/28 Florian Gilcher <flo@andersground.net>:
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> On a sidenote, Ruby 1.9 also has this cool function:
>
>  f = ->(a,b){ a + b }
>  c = f.curry
>  b = c[1]
>
> where b is a partially applied function, with a bound to 1.
>
>  b[6] #=> a + b = 7
>
> then evaluates the whole function.

The cool thing is that the result of f.curry can be used to curry the
function as well as to evaluate it - depending on the number of
arguments:

irb(main):001:0> f = ->(a,b){ a + b }
=> #<Proc:0x101731c0@(irb):1 (lambda)>
irb(main):002:0> f[1,2]
=> 3
irb(main):003:0> c = f.curry
=> #<Proc:0x10169d28>
irb(main):004:0> c[1,2]
=> 3
irb(main):005:0> b = c[1]
=> #<Proc:0x10159cc0>
irb(main):006:0> b[2]
=> 3
irb(main):007:0>

> P.S.: I still think it should be called #schönfinkeln.

LOL

Kind regards

robert

-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/