Require a regular expression for below

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1.00/5 (1 vote)

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I have a string such as :

"For Sports watch @@video:[anything]$$ For Entertainment watch
@@video:[anything]$$";

Can anyone help me to generate a regular expression to retrieve all
@@video:[anything]$$ kind of links? i.e. I require all text starting from @@video upto $$

P.S : There can be any special characters like @,$ etc. in anything of
@@video:[anything]$$

Posted 8-Oct-14 3:29am

NiteshPanj

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Richard Deeming · Accepted Answer · 2014-10-08T03:35:00

Solution 1

You haven't mentioned which language you're using, but something like this should work:

\@\@video:\[([^\]]+?)\]\$\$

http://refiddle.com/refiddles/54353e0375622d4dfa051200[^]

Posted 8-Oct-14 3:35am

Richard Deeming

Updated 8-Oct-14 3:37am

v2

Comments

jaket-cp 8-Oct-14 10:32am

I wanted to ask, what does the +? do and could you not use the + instead.
Did some reading, and non-greedy came up :)
Also I believe the question was to include all special characters,
Here is your example modified: /\@\@video(.+?)\$\$/g

Richard Deeming 8-Oct-14 10:35am

+? means "match at least one, but as few as possible". Without it, if you were using .+, the match would be extended until the end of the last @@video[...]$$ tag in the input string.

You could use "." to match any character, but I chose to use "[^\]]" to match any character except a closing square bracket. Depending on the regex engine, this might be slightly faster.

jaket-cp 8-Oct-14 10:46am

Thanks for the explanation.

I believe you answer is 100% correct, just the ambiguity in the question:
"i.e. I require all text starting from @@video upto $$"

Also how do you highlight your text within a comment - or is that in a how to somewhere? Thanks

Richard Deeming 8-Oct-14 10:47am

The highlight is just standard HTML markup - in this case, <code>...</code> tags around the text. :)

jaket-cp 8-Oct-14 10:49am

cool didn't know you could use HTML in the comments - thanks :)

Maciej Los 8-Oct-14 11:45am

Good job, +5!