[Haskell-cafe] Need some help with an infinite list

[Thomas Davie]

letterCombos = map (:[]) ['a'..'z'] ++ concatMap (\c -> map ((c++) . (: 
[])) ['a'..'z']) letterCombos

Not hugely efficient, if you generate the strings in reverse then you  
can use (c:) rather than ((c++) . (:[])), but that may not be useful  
to you.

Bob

On 17 Jun 2009, at 02:28, GüŸnther Schmidt wrote:

> Hi guys,
>
> I'd like to generate an infinite list, like
>
> ["a", "b", "c" .. "z", "aa", "ab", "ac" .. "az", "ba", "bb", "bc" ..  
> "bz", "ca" ...]
>
> When I had set out to do this I thought, oh yeah no prob, in a  
> heartbeat.
>
> Uhm.
>
> Help, pls!
>
> Günther
>
> PS: I know this should be a no-brainer, sry
>
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