Level4 again Vai alla sfida "Training: Regex"
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Level4 again
13 Mar 2013 - 23:46:39 (13a 234gg)
13 Mar 2013 - 23:46:39 (13a 234gg)
Can you help me find why this regex is incorrect?
Are there any incorrect cases which can bypass it?
I've tested it and it captures only filename (with or without 4) and only with specified extension.
Thanks for help!
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RE: Level4 again
14 Mar 2013 - 00:05:15 (13a 234gg)
14 Mar 2013 - 00:05:15 (13a 234gg)
It doesn't capture filename, it matches filename and extension and additionally captures extension without the dot. You must to capture filename and only filename.
Edit.
Seems that you tested it wrong. ;)
Edit.
Seems that you tested it wrong. ;)
Ultima modifica: pskosinski - 14 Mar 2013 - 00:12:29
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RE: Level4 again
14 Mar 2013 - 01:00:09 (13a 234gg)
14 Mar 2013 - 01:00:09 (13a 234gg)
what do you mean capture? what is the differenct between capture and matches?
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RE: Level4 again
14 Mar 2013 - 01:29:32 (13a 234gg)
14 Mar 2013 - 01:29:32 (13a 234gg)
i see two problems whith your regex:
- you have two groups. one should be enough...
- how do you start a non-capturing group? hint: it's not ?=
capturing is done using capturing groups. that means if a string matches the pattern, then parts of that string can be captured using capturing groups...
- you have two groups. one should be enough...
- how do you start a non-capturing group? hint: it's not ?=
capturing is done using capturing groups. that means if a string matches the pattern, then parts of that string can be captured using capturing groups...
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RE: Level4 again
15 Mar 2013 - 02:36:42 (13a 233gg)
15 Mar 2013 - 02:36:42 (13a 233gg)
Finally completed this task. Thanks for help guys!
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RE: Level4 again
18 Giu 2017 - 20:55:18 (9a 136gg)
18 Giu 2017 - 20:55:18 (9a 136gg)
Citazione da sutupud14 Mar 2013 - 01:29:32
i see two problems whith your regex:
- you have two groups. one should be enough...
- how do you start a non-capturing group? hint: it's not ?=
capturing is done using capturing groups. that means if a string matches the pattern, then parts of that string can be captured using capturing groups...
Why isn't it "?="?
My regex works fine on online demos, but I can't just get it to work on this challenge
"?:" Doesn't seem to have any effect on those demos
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