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Re: Perl, etc has these "?"-prefix modifiers/codes/whatever. Precisely w
From: |
Pascal J. Bourguignon |
Subject: |
Re: Perl, etc has these "?"-prefix modifiers/codes/whatever. Precisely which does emacs have (and NOT have)? |
Date: |
Thu, 18 Feb 2010 20:02:26 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/23.1 (darwin) |
John Withers <grayarea@reddagger.org> writes:
> On Thu, 2010-02-18 at 12:46 +0100, Pascal J. Bourguignon wrote:
>> dkcombs@panix.com (David Combs) writes:
>>
>> > Subj: Perl, etc has these "?"-prefix modifiers/codes/whatever.
>> > Precisely which does emacs have (and NOT have)?
>> >
>> >
>> > Please, someone, make an ascii or html table or even plain text
>> > list of all these neat "new" non-standard ops that perl and
>> > even php and ruby etc seem to have now, comparing them
>> > to what Emacs has or don't have.
>>
>> emacs lisp has a lot of data types. But in lisp, the types are not
>> associated to the variables, but to the values. Therefore names
>> (symbols are used to name things in general in lisp) don't need to be
>> marked in any special way.
>
> No, what he wants is for someone to go through and make a list of all
> the perl lookahead/behind assertions for regular expressions, even
> though the data is very easily found with a single google search and
> comes down to pretty much if it has a (?<symbol> then emacs doesn't have
> it, because the regexes in emacs haven't been touched since the
> neolithic.
>
> And finally he is looking for a code patch or pointers to where to look
> for something like this patch you can find with a simple google search:
> http://emacsbugs.donarmstrong.com/cgi/bugreport.cgi?msg=1;bug=5393
>
> And while I am more than happy to take digs at the lack of basic google
> searches and lazyweb requests, I do get the sentiment. At this point the
> entire rest of the world has moved on to perl-style regular expressions
> a good decade ago, and unlike many things about the world moving in a
> different direction than emacs, in this case they have more
> functionality. Lookahead and lookbehind assertions are useful.
Ah, I thought he meant the $x @x #x whatever...
In the case of "regular expressions", when you add certain extensions,
they're not regular expressions at all, so, I will just cite Jamie
Zawinski:
Some people, when confronted with a problem, think "I know, I'll use
regular expressions." Now they have two problems.
--
__Pascal Bourguignon__
- Perl, etc has these "?"-prefix modifiers/codes/whatever. Precisely which does emacs have (and NOT have)?, David Combs, 2010/02/18
- Re: Perl, etc has these "?"-prefix modifiers/codes/whatever. Precisely which does emacs have (and NOT have)?, Pascal J. Bourguignon, 2010/02/18
- Re: Perl, etc has these "?"-prefix modifiers/codes/whatever. Precisely which does emacs have (and NOT have)?, John Withers, 2010/02/18
- Message not available
- Re: Perl, etc has these "?"-prefix modifiers/codes/whatever. Precisely which does emacs have (and NOT have)?,
Pascal J. Bourguignon <=
- Re: Perl, etc has these "?"-prefix modifiers/codes/whatever. Precisely which does emacs have (and NOT have)?, John Bokma, 2010/02/18
- Re: Perl, etc has these "?"-prefix modifiers/codes/whatever. Precisely which does emacs have (and NOT have)?, John Withers, 2010/02/18
- Message not available
- Re: Perl, etc has these "?"-prefix modifiers/codes/whatever. Precisely which does emacs have (and NOT have)?, David Combs, 2010/02/18
- Message not available
- Re: Perl, etc has these "?"-prefix modifiers/codes/whatever. Precisely which does emacs have (and NOT have)?, Pascal J. Bourguignon, 2010/02/18
- Re: Perl, etc has these "?"-prefix modifiers/codes/whatever. Precisely which does emacs have (and NOT have)?, John Withers, 2010/02/18
- Message not available
- Re: Perl, etc has these "?"-prefix modifiers/codes/whatever. Precisely which does emacs have (and NOT have)?, Tim X, 2010/02/19
- Re: Perl, etc has these "?"-prefix modifiers/codes/whatever. Precisely which does emacs have (and NOT have)?, John Withers, 2010/02/20
- Message not available
- Re: Perl, etc has these "?"-prefix modifiers/codes/whatever. Precisely which does emacs have (and NOT have)?, Tim Landscheidt, 2010/02/23
Re: Perl, etc has these "?"-prefix modifiers/codes/whatever. Precisely which does emacs have (and NOT have)?, Tyler Smith, 2010/02/18
Message not available