Beefy Boxes and Bandwidth Generously Provided by pair Networks
Welcome to the Monastery
 
PerlMonks  

Re: (FoxUni) Re: the next step

by educated_foo (Vicar)
on May 09, 2002 at 16:55 UTC ( #165428=note: print w/ replies, xml ) Need Help??


in reply to Re: the next step
in thread the next step

You can get pretty much the same techniques out of Haskell, but you'll miss currying.

Huh? Haskell's curried...

foo a b c = a ++ c ++ b with_parens a b = foo a b y = with_parens "<" ">"
then print (y "banana") prints "<banana>". BTW, if you haven't, you should definitely check out Haskell, as it can be a truly mind-bending experience. It's easy to get up and running with the HUGS interpreter, now with delicious readline support.

/s

Update: you won't miss the currying anymore...

use strict; use Carp; use Attribute::Handlers; sub _curry { my ($n, $func, @args) = @_; return sub { my $narg = @args + @_; if ($narg > $n) { carp "$narg args to curried function (expects $n)."; } elsif ($narg < $n) { return _curry($n, $func, @args, @_); } else { return &$func(@args, @_); } }; } sub curry : ATTR(CODE) { my ($package, $symbol, $code, $name, $n) = @_; confess "Usage: sub mysub : curry(N), where N > 0" unless $n; local($^W) = 0; no strict 'refs'; my $newsub = _curry($n, $code); *{$package . '::' . *{$symbol}{NAME}} = $newsub; } sub foo :curry(3) { print "foo: @_\n"; } my $x = foo(1,2); &$x(3); &$x(2);


Comment on Re: (FoxUni) Re: the next step
Select or Download Code

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://165428]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others drinking their drinks and smoking their pipes about the Monastery: (6)
As of 2015-07-04 07:46 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









    Results (58 votes), past polls