[Haskell-cafe] how to get started: a text application
max at ucmg.com.ua
Fri Jun 25 10:51:32 EDT 2004
Graham Klyne wrote:
> On reflection, I think there's a strong case for doing it this way (i.e.
> with a separate tokenizer) in Haskell, even if the tokenization is very
> simple, because it helps to separate some of the character-level issues
> from the remaining program logic. Any spurious detail that can be
> separated from the core logic makes the core easier to understand.
> Divide and rule! And, if I understand correctly, Haskell's lazy
> evaluation should mean that there's little or no penalty for doing this,
> even though it looks as if you're generating substantial intermediate data.
Fine. Though I'm not concerned with a perfomance, at least not until I
get a first working version. ;)
> BTW, for a project like this, be very aware of the cost of using ++ to
> append to a sequence. Look at the ShowS type in the standard Prelude
> (PreludeText). I also made some notes about this .
I skimmed through, and the whole page looks very instructive, thanks!
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