[Haskell-beginners] get date

[Luca Ciciriello]

Starting from the beginning, my original problem is to create the string:

"File creation date:  " ++ currentSystemDate ++ " by MyCompany"

to obtain the string

"File creation date: 2010-06-24 by MyCompany"

Probably this is really trivial, but I'm a real beginner in Haskell and this seems to me a big problem.

Luca.

On Jun 24, 2010, at 9:59 AM, Ozgur Akgun wrote:

> On 24 June 2010 10:52, Luca Ciciriello <luca_ciciriello at hotmail.com> wrote:
> Just a question.
> How can I obtain a String from
> 
> currentTime :: IO Day
> currentTime =  utctDay `fmap` getCurrentTime
> 
> Here currentTime returns to me 2010-06-24, but I want "2010-06-24".
> In another worlds I need a function
> 
> 
> I bet Day has a Show instance (that's why you get 2010-06-24 in ghci I suppose)
> Just use that.
> 
>  
> currentTimeStr :: IO Day -> String
> 
> 
> Getting out of IO? I would think again. Following might be what you really want:
> 
> currentTimeStr :: IO Day -> IO String
> 
>  
> Any Idea?
> 
> Luca.
>  
> Best,
> Ozgur 

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