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| From | Eric Bednarz <bednarz@fahr-zur-hoelle.org> |
| Newsgroups | comp.lang.javascript |
| Subject | Re: ScreenName validation |
| Organization | Eric Conspiracy Secret Labs |
| References | <al347sFepchU1@mid.individual.net> <53ccd13b-a933-4bbc-ba0a-7061cc9064cd@4g2000yqv.googlegroups.com> <m28v807ec9.fsf@nntp.bednarz.nl> <r1que89eftmfejrieqstmo7bp1ra3e92rv@4ax.com> <m2hamnqzr4.fsf@nntp.bednarz.nl> <m2obgvii6g.fsf@nntp.bednarz.nl> <kcpv2o$epv$1@news.albasani.net> |
| Reply-To | ebednarz@gmx.net |
| X-Eric-Conspiracy | There is no conspiracy |
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| Date | Fri, 11 Jan 2013 23:23:15 +0100 |
| Message-ID | <m2txqnicks.fsf@nntp.bednarz.nl> (permalink) |
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Stefan Weiss <krewecherl@gmail.com> writes:
> Could you give an example of when the literal ] character doesn't have
> to be escaped in a character class?
I'm not sure what you are asking. Examples in other languages?
$ php -r 'echo preg_match("/^[]]$/", "]"), "\n";'
1
$ irb
>> /^[]]$/ =~ "]"
(irb):1: warning: character class has `]' without escape
=> 0
$ python
[...]
>>> import re
>>> re.compile('^[]]$').match(']')
<_sre.SRE_Match object at 0x109e39168>
$ groovysh
[...]
groovy:000> "]" ==~ /^[]]$/
===> true
> The empty character class is supported in many (but not all) PCRE-like
> regex implementations.
$ perl -e 'print "]" =~ /^[]]$/, "\n";'
1
> In addition to "\", "]", and "-", some languages also require the regex
> delimiter to be escaped in regex literals.
Well, some languages require you to .NOT escape the underscore. :-)
Back to comp.lang.javascript | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
ScreenName validation "Mel Smith" <med_cutout_syntel@aol.com> - 2013-01-08 10:44 -0700
Re: ScreenName validation Scott Sauyet <scott.sauyet@gmail.com> - 2013-01-08 11:02 -0800
Re: ScreenName validation "Mel Smith" <med_cutout_syntel@aol.com> - 2013-01-08 13:05 -0700
Re: ScreenName validation Eric Bednarz <bednarz@fahr-zur-hoelle.org> - 2013-01-11 01:28 +0100
Re: ScreenName validation Jeff North <jnorthau@yahoo.com.au> - 2013-01-11 12:23 +1100
Re: ScreenName validation Stefan Weiss <krewecherl@gmail.com> - 2013-01-11 03:38 +0100
Re: ScreenName validation Eric Bednarz <bednarz@fahr-zur-hoelle.org> - 2013-01-11 20:35 +0100
Re: ScreenName validation Eric Bednarz <bednarz@fahr-zur-hoelle.org> - 2013-01-11 21:22 +0100
Re: ScreenName validation Stefan Weiss <krewecherl@gmail.com> - 2013-01-11 22:09 +0100
Re: ScreenName validation Eric Bednarz <bednarz@fahr-zur-hoelle.org> - 2013-01-11 23:23 +0100
Re: ScreenName validation Stefan Weiss <krewecherl@gmail.com> - 2013-01-12 00:26 +0100
Re: ScreenName validation Eric Bednarz <bednarz@fahr-zur-hoelle.org> - 2013-01-12 00:54 +0100
Re: ScreenName validation Eric Bednarz <bednarz@fahr-zur-hoelle.org> - 2013-01-12 00:22 +0100
Re: ScreenName validation Scott Sauyet <scott.sauyet@gmail.com> - 2013-01-11 13:29 -0800
Re: ScreenName validation Eric Bednarz <bednarz@fahr-zur-hoelle.org> - 2013-01-12 02:31 +0100
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