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Postings from November 2020
On 2020/11/23 16:51, Dan Book wrote:
> On Mon, Nov 23, 2020 at 7:46 PM L A Walsh <Astara@tlinx.org
> <mailto:Astara@tlinx.org>> wrote:
>
> On 2020/11/18 08:37, Dan Book wrote:
> > On Wed, Nov 18, 2020 at 3:17 AM L A Walsh <Astara@tlinx.org
> <mailto:Astara@tlinx.org>
> > <mailto:Astara@tlinx.org <mailto:Astara@tlinx.org>>> wrote:
> > The documentation added by the PR explains it. It removes leading
> and
> > trailing whitespace.
> ----
> That begs the questions:
> 0) if whitespace, that includes tabs, LF's CR's, i.e.
> any thing '\s' matches?
> 1) What if I only want to trim at beginning or end?
> 2) Why not support a regex like, say, TCL does?
>
> I.e. why should a perl command be limited to only trimming
> whitespace?
>
>
> This has been discussed in the feature request ticket, summed up
> at https://github.com/Perl/perl5/issues/17952#issuecomment-658462652.
----
I didn't see anyone pointing out the circular logic of limiting
this to '\s'? I.e.
* scottchiefbaker <https://github.com/scottchiefbaker> * commented
Jul 14, 2020
<https://github.com/Perl/perl5/issues/17952#issuecomment-658467533>
Languages that allow a second argument list of what to remove: PHP
Languages that just implement |\s|: Javascript, Ruby, Raku, Python
I know for certain that Javascript was heavily influenced by perl,
Raku was perl6, python's regex (thus '\s' ) came from perl, and I'm pretty
sure Ruby had similar influences.
Might want to add TCL to languages that support alternatives to simple
whitespace stripping. TAB is oft used as a field separator, and skipping
past LF's seems and other white space seems unnatural.
That the perl-derived langs all used '\s' just shows how they got lazy
and used '\s' instead of a subset or just literal spaces.
Certainly support for an optional regex 'range', would be of more use, i.e.
[\ \t\j\r...]. Option 4 could be special cased easily enough.
So what was the objection to this being an '.xs' module in CORE? Wouldn't
the same efficiencies be achieved?
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