«

〈Your Regex Brain〉
http://xahlee.org/comp/your_regex_brain.html

Yours truely,

Xah

On Sat, 24 Mar 2012 16:30:28 -0700 (PDT), Xah Lee <> wrote:

>?Your Regex Brain?
>http://xahlee.org/comp/your_regex_brain.html
>

That's more like a brain cell.
This is more like a regex brain.

'
<img
(?=\s)
(?= (?:[^>"\']|"[^"]*"|\'[^\']*\')*? (?<=\s) width \s*=
(?: (?> \s* ([\'"]) \s* (?<WIDTH>.*?) \s* \g{-2} )
| (?> (?!\s*[\'"]) \s* (?<WIDTH>[^\s>]*) (?=\s|>) )
)
)
(?= (?:[^>"\']|"[^"]*"|\'[^\']*\')*? (?<=\s) src \s*=
(?: (?> \s* ([\'"]) \s* (?<SRC>.*?) \s* \g{-2} )
| (?> (?!\s*[\'"]) \s* (?<SRC>[^\s>]*) (?=\s|>) )
)
)
(?= (?:[^>"\']|"[^"]*"|\'[^\']*\')*? (?<=\s) height \s*=
(?: (?> \s* ([\'"]) \s* (?<HEIGHT>.*?) \s* \g{-2} )
| (?> (?!\s*[\'"]) \s* (?<HEIGHT>[^\s>]*) (?=\s|>) )
)
)
(?= (?:[^>"\']|"[^"]*"|\'[^\']*\')*? (?<=\s) alt \s*=
(?: (?> \s* ([\'"]) \s* (?<ALT>.*?) \s* \g{-2} )
| (?> (?!\s*[\'"]) \s* (?<ALT>[^\s>]*) (?=\s|>) )
)
)
(?> \s+ (?:".*?"|\'.*?\'|[^>]*?)+ > ) (?<!/>)
'

-sln

["Followup-To:" header set to comp.lang.perl.misc.]
On 2012-03-27 00:02, <> wrote:
> This is more like a regex brain.
>
> '
><img
> (?=\s)
> (?= (?:[^>"\']|"[^"]*"|\'[^\']*\')*? (?<=\s) width \s*=
> (?: (?> \s* ([\'"]) \s* (?<WIDTH>.*?) \s* \g{-2} )
> | (?> (?!\s*[\'"]) \s* (?<WIDTH>[^\s>]*) (?=\s|>) )
> )
> )
> (?= (?:[^>"\']|"[^"]*"|\'[^\']*\')*? (?<=\s) src \s*=
> (?: (?> \s* ([\'"]) \s* (?<SRC>.*?) \s* \g{-2} )
> | (?> (?!\s*[\'"]) \s* (?<SRC>[^\s>]*) (?=\s|>) )
> )
> )
> (?= (?:[^>"\']|"[^"]*"|\'[^\']*\')*? (?<=\s) height \s*=
> (?: (?> \s* ([\'"]) \s* (?<HEIGHT>.*?) \s* \g{-2} )
> | (?> (?!\s*[\'"]) \s* (?<HEIGHT>[^\s>]*) (?=\s|>) )
> )
> )
> (?= (?:[^>"\']|"[^"]*"|\'[^\']*\')*? (?<=\s) alt \s*=
> (?: (?> \s* ([\'"]) \s* (?<ALT>.*?) \s* \g{-2} )
> | (?> (?!\s*[\'"]) \s* (?<ALT>[^\s>]*) (?=\s|>) )
> )
> )
> (?> \s+ (?:".*?"|\'.*?\'|[^>]*?)+ > ) (?<!/>)
> '

"This is your brain on drugs."

SCNR,
hp


--
_ | Peter J. Holzer | Deprecating human carelessness and
|_|_) | Sysadmin WSR | ignorance has no successful track record.
| | | |
__/ | http://www.hjp.at/ | -- Bill Code on