[Haskell-cafe] Re: Problems interpreting
mailing_list at istitutocolli.org
Mon Sep 18 08:23:21 EDT 2006
On Mon, Sep 18, 2006 at 12:42:59PM +0100, Jón Fairbairn wrote:
> And if you do that, you can write it like this:
> subst e l'
> = concat . map subst_elem
> where subst_elem x
> | x == e = l'
> | otherwise = [x]
Pretty. Just to many keystrokes.
This should take two keystrokes less, probably:
subst e l  = 
subst e l (x:xs) = if x == e then l ++ xs else x : subst e l xs
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