Lambdaizing Python Code
Fernando Pérez
fperez528 at yahoo.com
Sat Sep 28 21:54:44 EDT 2002
Gerson Kurz wrote:
> A really usefull study ... NOT.
>
> http://p-nand-q.com/e/quicksort_lambda.html
>
> also known as "making Guido regret he put lambda in THE BEST
> PROGRAMMING LANGUAGE IN THE WORLD(TM)".
Now, as an excersise in sillyness it's funny. However, a more reasonable
rewriting as a lambda can be found at:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/66473
And is a simple one-liner:
q=lambda x:(lambda o=lambda s:[i for i in x if cmp(i,x[0])==s]:len(x)>1 \
and q(o(-1))+o(0)+q(o(1)) or x)()
Granted, for a quicksort I'd _much_ rather use a normal functional form. But
this doesn't mean that a lambda form has to be the monstrosity depicted in
that page :) I do take my hat off to whoever wrote it: just the fact that it
works at all is an accomplishment in and of itself.
Cheers,
f.
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