H98 Text IO
Chris Kuklewicz
haskell at list.mightyreason.com
Wed Feb 27 03:54:17 EST 2008
Small correction:
I think "./prog in vs ./prog < in " and "utf8" should be "ok".
(and I thought this was switched to Glasgow-haskell-users at haskell.org)
David Leuschner wrote:
>> Let me try and summarise:
>
> Thanks for the great summary! And thanks to Emacs' table mode here're the
> results displayed as a table:
>
> +--------------------------------+-----+--------+------+-------+-------+
> | | now | locale | utf8 | mix-A | mix-B |
> +--------------------------------+-----+--------+------+-------+-------+
> | putStrLn "..." | - | ok | - | ok | ok |
> +--------------------------------+-----+--------+------+-------+-------+
> | ./prog vs ./prog | cat | ok | ok | ok | - | ok |
> +--------------------------------+-----+--------+------+-------+-------+
> | ./prog in vs ./prog < in | - | ok | - | ok | - |
> +--------------------------------+-----+--------+------+-------+-------+
> | ./prog vs ./prog | hexdump -C | ok | ok | ok | - | ok |
> +--------------------------------+-----+--------+------+-------+-------+
>
>
> The mixtures are good ideas but can give inconsistent and suriprising
> results (especially when debugging encoding issues). And if our CEO would
> have known that ... putStrLn <his-name> ... doesn't work he'd have
> probably ruled out Haskell right from the start. Even "utf8" gives
> surprising results: I'd be very surprised if my Mac-written Haskell
> program outputs junk on Windows or Linux even if the byte sequence is
> exactly the same UTF-8 text.
>
> Personally I think consistency on a single platform is more important than
> trying to achieve cross-platform consistency which involves a lot more
> than just encoding. If you've reached that point with your program you're
> probably anyway using "advanced functions" to exactly specify what will be
> output. Following "the principle of least surprise" is also a good idea.
>
> Cheers,
>
> David
>
>
>
>
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