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Re: delimiters with more than one character?

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  Re: delimiters with more than one character? William Michels <wjm1@caa.columbia.edu> - 2020-07-16 21:10 +0200
    Re: delimiters with more than one character? Nicolas George <george@nsup.org> - 2020-07-16 21:10 +0200
      Re: delimiters with more than one character? William Michels <wjm1@caa.columbia.edu> - 2020-07-17 04:10 +0200
    Re: delimiters with more than one character? Dan Ritter <dsr@randomstring.org> - 2020-07-16 21:30 +0200
      Re: delimiters with more than one character? David Wright <deblis@lionunicorn.co.uk> - 2020-07-17 05:00 +0200
        Re: delimiters with more than one character? Dan Ritter <dsr@randomstring.org> - 2020-07-17 14:40 +0200

#224887 — Re: delimiters with more than one character?

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<a href="mailto:debian-user@lists.debian.org?in-reply-to=<
CAFakBwhN7crFsov60mR9tF4VUS1Duv4CNQohBBDyX-AWOXW-Kw@mail.gmail.com>&amp;subject=Re:%20Re:
delimiters with more than one character? ...">debian-user@lists.debian.org
</a>

I've slowly been learning the Raku programming language (AKA Perl6), and
while I'm far from being an expert, this is the first solution I came up
with (raku one-or-two-liners, at the bash command prompt):

user@mbook:~$ raku -e ' my Str $s=" 34 + 45 \| abc \| 1 2 3 \| c\|123abc ";
$s.put';
 34 + 45 | abc | 1 2 3 | c|123abc
user@mbook:~$ raku -e ' my Str $s=" 34 + 45 \| abc \| 1 2 3 \| c\|123abc ";
$s.split("|").raku.put';
(" 34 + 45 ", " abc ", " 1 2 3 ", " c", "123abc ").Seq
user@mbook:~$ raku -e ' my Str $s=" 34 + 45 \| abc \| 1 2 3 \| c\|123abc ";
.put for $s.split("|");'
 34 + 45
 abc
 1 2 3
 c
123abc
user@mbook:~$ raku -e ' my Str $s=" 34 + 45 \| abc \| 1 2 3 \| c\|123abc ";
.raku.put for $s.split("|");'
" 34 + 45 "
" abc "
" 1 2 3 "
" c"
"123abc "
user@mbook:~$

Looking at the Str typed-variable $s I see that backslash escapes are
removed automatically (the second command only has to split on the pipe
character). So maybe this isn't a general solution, but it works for the
example given.

https://raku.org/

HTH, Bill.

(Apologies if this message gets threaded improperly).

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#224888

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William Michels (12020-07-16):
> <a href="mailto:debian-user@lists.debian.org?in-reply-to=<
> CAFakBwhN7crFsov60mR9tF4VUS1Duv4CNQohBBDyX-AWOXW-Kw@mail.gmail.com>&amp;subject=Re:%20Re:
> delimiters with more than one character? ...">debian-user@lists.debian.org
> </a>

???

> I've slowly been learning the Raku programming language (AKA Perl6), and
> while I'm far from being an expert, this is the first solution I came up
> with (raku one-or-two-liners, at the bash command prompt):
> 
> user@mbook:~$ raku -e ' my Str $s=" 34 + 45 \| abc \| 1 2 3 \| c\|123abc ";
> $s.put';
>  34 + 45 | abc | 1 2 3 | c|123abc

Observe your output carefully. You'll notice that the string you defined
does not actually contain any backslash.

Regards,

-- 
  Nicolas George

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#224890

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On Thu, Jul 16, 2020 at 12:03 PM Nicolas George wrote:
>
> Observe your output carefully. You'll notice that the string you defined
> does not actually contain any backslash.
>
> Regards,
>
>   Nicolas George

Thank you, Nicholas!

Looks like the trick for Raku one-liners on the bash command line is to use
single quotes on the outside, and one of Raku's quoting-language constructs
(Q[ ... ], known as the Raku 'literal string' construct) on the inside.
Note splitting on the two-character "\|" delimiter in the second (final)
statement:

user@mbook:~$ raku -e 'my Str $s= Q[ 34 + 45 \| abc \| 1 2 3 \| c\|123abc
]; .raku.put for $s.split( Q[\|] );'
" 34 + 45 "
" abc "
" 1 2 3 "
" c"
"123abc "
user@mbook:~$

Reference: "The Q Lang"
https://docs.raku.org/language/quoting

HTH, Bill.

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#224889

William Michels wrote: 
> <a href="mailto:debian-user@lists.debian.org?in-reply-to=<
> CAFakBwhN7crFsov60mR9tF4VUS1Duv4CNQohBBDyX-AWOXW-Kw@mail.gmail.com>&amp;subject=Re:%20Re:
> delimiters with more than one character? ...">debian-user@lists.debian.org
> </a>
> 
> I've slowly been learning the Raku programming language (AKA Perl6), and

Please don't call it that. Perl 1-5 have a clear relationship, and that
relationship continues  in Perl 7 and subsequent versions. Raku should
not be referred to as a Perl, even though it was for many years.

Raku is a new lineage.

-dsr-

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#224893

On Thu 16 Jul 2020 at 15:27:06 (-0400), Dan Ritter wrote:
> William Michels wrote: 
> > I've slowly been learning the Raku programming language (AKA Perl6), and
> 
> Please don't call it that. Perl 1-5 have a clear relationship, and that
> relationship continues  in Perl 7 and subsequent versions. Raku should
> not be referred to as a Perl, even though it was for many years.
> 
> Raku is a new lineage.

Thank you, William. I would not have known what you were talking about
without the AKA. Surely we're not obliged to write "the language
formerly known as Perl6". IIUC the name Raku isn't yet a year old.

I lost interest in Perl around the time of Perl4→5, so I had no idea
that that's what became of Perl6. I remember it being talked about
when I retired, and stopped reading the computing press. I guess
Perl7 is at about the same stage, still over the horizon.

Cheers,
David.

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#224899

David Wright wrote: 
> On Thu 16 Jul 2020 at 15:27:06 (-0400), Dan Ritter wrote:
> > William Michels wrote: 
> > > I've slowly been learning the Raku programming language (AKA Perl6), and
> > 
> > Please don't call it that. Perl 1-5 have a clear relationship, and that
> > relationship continues  in Perl 7 and subsequent versions. Raku should
> > not be referred to as a Perl, even though it was for many years.
> > 
> > Raku is a new lineage.
> 
> Thank you, William. I would not have known what you were talking about
> without the AKA. Surely we're not obliged to write "the language
> formerly known as Perl6". IIUC the name Raku isn't yet a year old.
> 
> I lost interest in Perl around the time of Perl4???5, so I had no idea
> that that's what became of Perl6. I remember it being talked about
> when I retired, and stopped reading the computing press. I guess
> Perl7 is at about the same stage, still over the horizon.

https://www.perl.com/article/announcing-perl-7

"Perl 7.0 is going to be v5.32 but with different, saner, more
modern defaults. You won't have to enable most of the things
you are already doing because they are enabled for you. The
major version jump sets the boundary between how we have been
doing things and what we can do in the future."

-dsr-

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