Re: [Haskell-cafe] question about show

Show is supposed to convert its argument into a haskell expression which, when evaluated, returns the same value that was initially passed to show. So by this definition, "\252" is just as correct as "ü". There are some Show instances out in the world that do not follow this rule, but they are bad. I'm looking at you, Network.URI! On Wed, Mar 5, 2014 at 2:20 PM, wrote:

Okay, it makes somewhat more sense now after reading that thread. But technically, why does

show "ü"

not handle Unicode? Isn't the internal representation of [Char] actually still Unicode, as per

http://hackage.haskell.org/package/base-4.6.0.1/docs/Data-Char.html

Thanks!

k

On Wed, Mar 5, 2014, at 01:46 PM, Clark Gaebel wrote:

"Show" is for debug output. It's not a generic "to_string". See this thread [1] from last week for more info.

- Clark

[1] https://groups.google.com/forum/#!topic/haskell-cafe/32EeI96b1VQ

On Wed, Mar 5, 2014 at 4:43 PM, wrote:

Hello!

I'm sure this has been answered many times before, but I can't find an explanation for this behavior anywhere. The question I have is a general one regarding 'show'. Why does

main = do putStrLn "ü"

➜ ~ runhaskell test.hs ü

and:

main = do putStrLn $ show "ü"

➜ ~ runhaskell test.hs "\252"

Thank you all for an enlightening answer already!

Best,

k _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

-- Clark.

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