Here's a way using list comprehensions:
Prelude Data.List> take 1000 $ concat.concat $ [ [ replicate n c | c
<- ['a'..'z'] ] | n <- [1..] ]
"abcdefghijklmnopqrstuvwxyzaabbccddeeffgghhiijjkkllmmnnooppqqrrssttuuvvw
wxxyyzzaaabbbcccdddeeefffggghhhiiijjjkkklllmmmnnnooopppqqqrrrssstttuuuvvvwwwxxxyyyzzzaaaabbbbccccddddeeeeffffgggghhhhiiiijjjjkkkkllllmmmmnnnnooooppppqqqqrrrrssssttttuuuuvvvvwwwwxxxxyyyyzzzzaaaaabbbbbcccccdddddeeeeefffffggggghhhhhiiiiijjjjjkkkkklllllmmmmmnnnnnooooopppppqqqqqrrrrrssssstttttuuuuuvvvvvwwwwwxxxxxyyyyyzzzzzaaaaaabbbbbbccccccddddddeeeeeeffffffgggggghhhhhhiiiiiijjjjjjkkkkkkllllllmmmmmmnnnnnnooooooppppppqqqqqqrrrrrrssssssttttttuuuuuuvvvvvvwwwwwwxxxxxxyyyyyyzzzzzzaaaaaaabbbbbbbcccccccdddddddeeeeeeefffffffggggggghhhhhhhiiiiiiijjjjjjjkkkkkkklllllllmmmmmmmnnnnnnnooooooopppppppqqqqqqqrrrrrrrssssssstttttttuuuuuuuvvvvvvvwwwwwwwxxxxxxxyyyyyyyzzzzzzzaaaaaaaabbbbbbbbccccccccddddddddeeeeeeeeffffffffgggggggghhhhhhhhiiiiiiiijjjjjjjjkkkkkkkkllllllllmmmmmmmmnnnnnnnnooooooooppppppppqqqqqqqqrrrrrrrrssssssssttttttttuuuuuuuuvvvvvvvvwwwwwwwwxxxxxxxxyyyyyyyyzzzzzzzzaaaaaaaaabbbbbbbbbcccccccccdddddddddeeeeeeeeefffffffffgggggggggh"
-Ross
On Jun 16, 2009, at 8:39 PM, Daniel Peebles wrote:
One (rather ugly) option is:
tail . map (\y -> showIntAtBase 26 (\x -> chr (x + 96)) y "") $ [0..]
but I'm sure there's a prettier one out there :)
On Tue, Jun 16, 2009 at 8:28 PM, GüŸnther
Schmidt<[email protected]> 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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