[Haskell-beginners] Show Floats

[Johannes Laire]

On Fri, Nov 6, 2009 at 9:32 AM, David Virebayre
<dav.vire+haskell at gmail.com> wrote:
> On Fri, Nov 6, 2009 at 6:59 AM, Nathan M. Holden <nathanmholden at gmail.com>
> wrote:
>>
>> Um... well, I solved my own problem.
>>
>> It turns out that my 20-30 minutes of searching for a way to \definecolor
>> in
>> terms of 0-255 instead of 0.0-1.0 were just 5 minutes short of finding out
>> a
>> way to do it.
>>
>> This is embarrassing.
>
> If you have this problem again, you can use printf :
<snip>

There's also Numeric:
http://www.haskell.org/ghc/docs/latest/html/libraries/base/Numeric.html

Prelude> Numeric.showFFloat (Just 4) 0.001 ""
"0.0010"

-- 
Johannes Laire