[Haskell-cafe] All binary strings of a given length
Eugene Kirpichov
ekirpichov at gmail.com
Fri Oct 15 08:23:52 EDT 2010
Here's why it works:
genbin 3 = replicateM 3 "01" = (unfold replicateM) do x1 <- "01"; x2
<- "01" ; x3 <- "01"; return [x1,x2,x3] = your desired result
(enumerate all combinations of x1,x2,x3 with each being 0 or 1).
2010/10/15 Eugene Kirpichov <ekirpichov at gmail.com>:
> genbin = flip replicateM "01"
>
> 2010/10/15 rgowka1 <rgowka1 at gmail.com>:
>> Hi -
>>
>> How can I generate all binary string of a given length? The type
>> signature would something like -
>>
>> genbin :: Int -> [String]
>>
>> For example genbin 2 would give ["00","11","01","10"] and genbin 3
>> would give ["000","001","010","011","100","101","110","111"] etc..
>>
>> thanks..
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>
>
>
> --
> Eugene Kirpichov
> Senior Software Engineer,
> Grid Dynamics http://www.griddynamics.com/
>
--
Eugene Kirpichov
Senior Software Engineer,
Grid Dynamics http://www.griddynamics.com/
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