tolf and detab

[Andrej Mitrovic]

Andrei used to!string() in an early example in TDPL for some line-by-line
processing. I'm not sure of the advantages/disadvantages of to!type vs .dup.

On Sun, Aug 8, 2010 at 11:44 PM, bearophile <bearophileHUGS at lycos.com>wrote:

> Walter Bright:
> > If you want to conclude that Python is better at processing files, you
> need to
> > show it using each language doing it a way well suited to that language,
> rather
> > than burdening one so it uses the same method as the less powerful one.
>
> byLine() yields a char[], so if you want to do most kinds of strings
> processing or you want to store the line (or parts of it), you have to idup
> it. So in this case Python is not significantly less powerful than D.
>
> You can of course use the raw char[], but then you lose the advantages
> advertised when you have introduced the safer immutable D2 strings. And in
> many situations you have to dup the char[] anyway, otherwise your have all
> kinds of bugs, that Python lacks. In D1 to avoid it I used to use dup more
> often than necessary. I have explained this in the bug 4474.
>
> In this newsgroup my purpose it to show D faults, suggest improvements,
> etc. In this case my purpose was just to show that byLine()+idup is slow.
> And you have to thankful for my benchmarks. In my dlibs1 for D1 I have a xio
> module that reads files by line that is faster than iterating on a
> BufferedFile, so it's not a limit of the language, it's Phobos that has a
> performance bug that can be improved.
>
> Bye,
> bearophile
>
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