Level 3 Go to the Training: Regex challenge
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Level 3
Mar 03, 2012 - 20:58:01 (14y 243d)
Mar 03, 2012 - 20:58:01 (14y 243d)
I'm sorry for posting so much, but I just can't seem to understand why my answer is being rejected in level 3.
This is the assignment:
Your pattern shall match all images with the name wechall.ext or wechall4.ext and a valid image extension.
Valid image extensions are .jpg, .gif, .tiff, .bmp and .png.
And I get this error:
Your pattern would match "wechall.jpg ", but it should not match it.
But from the explanation it seems to me that it should match it. Could someone explain this to me?
This is the assignment:
Your pattern shall match all images with the name wechall.ext or wechall4.ext and a valid image extension.
Valid image extensions are .jpg, .gif, .tiff, .bmp and .png.
And I get this error:
Your pattern would match "wechall.jpg ", but it should not match it.
But from the explanation it seems to me that it should match it. Could someone explain this to me?
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RE: Level 3
Mar 03, 2012 - 21:00:15 (14y 243d)
Mar 03, 2012 - 21:00:15 (14y 243d)
The challenge also checks against "wechall.jpg "
Note the whitespace at the end of this checked filename.
Cheers
gizmore
Note the whitespace at the end of this checked filename.
Cheers
gizmore
The geeks shall inherit the properties and methods of object earth.
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RE: Level 3
Mar 03, 2012 - 21:00:47 (14y 243d)
Mar 03, 2012 - 21:00:47 (14y 243d)
Thanks
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RE: Level 3
Jul 19, 2012 - 22:09:13 (14y 105d)
Jul 19, 2012 - 22:09:13 (14y 105d)
Hi,
i'm getting reject with "Your pattern would match "wechall3.png", but it should not match it."
But my regex only allows no numbers or a 4.. i have no idea how the check can come up with a 3 allowed?! Every RegEx tests like RegEx Coach / other online Tests said it will not recognize wechall3.png..
I don't want to to post the almost complete RegEx here and i cannot sent PMs yet. But basically what i do is check for "wechall" followed by number and the "possible" operator, followed by . extension..
Does anyone knows whats going on?
i'm getting reject with "Your pattern would match "wechall3.png", but it should not match it."
But my regex only allows no numbers or a 4.. i have no idea how the check can come up with a 3 allowed?! Every RegEx tests like RegEx Coach / other online Tests said it will not recognize wechall3.png..
I don't want to to post the almost complete RegEx here and i cannot sent PMs yet. But basically what i do is check for "wechall" followed by number and the "possible" operator, followed by . extension..
Does anyone knows whats going on?
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RE: Level 3
Jul 20, 2012 - 00:45:50 (14y 105d)
Jul 20, 2012 - 00:45:50 (14y 105d)
It shall only match wechall4 and wechall, but not wechall3 ... maybe that`s the problem?
Another thing might be that . means any char, so you maybe want to escape it like \.
Maybe it helps
gizmore
Another thing might be that . means any char, so you maybe want to escape it like \.
Maybe it helps
gizmore
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RE: Level 3
Jul 20, 2012 - 10:35:30 (14y 105d)
Jul 20, 2012 - 10:35:30 (14y 105d)
It only checks vs the explicit 4. Not any number. Also i tried . oder \. - its no difference
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RE: Level 3
Oct 25, 2012 - 20:11:42 (14y 7d)
Oct 25, 2012 - 20:11:42 (14y 7d)
Hello challengers.
code(bmp|png|jpg|tiff|gif)
will show:
How can i pass that without () grouping?
Can you give me a link or hint for?
greets grmf.
code(bmp|png|jpg|tiff|gif)
will show:
Quote from UnknownYour pattern would capture a string, but this is not wanted. Please use a non capturing group.
How can i pass that without () grouping?
Can you give me a link or hint for?
greets grmf.
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RE: Level 3
Oct 25, 2012 - 20:15:28 (14y 7d)
Oct 25, 2012 - 20:15:28 (14y 7d)
use a non capturing group (?:group|here)
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RE: Level 3
Oct 25, 2012 - 20:25:51 (14y 7d)
Oct 25, 2012 - 20:25:51 (14y 7d)
Quote from UnknownCorrect, let`s see if you can come up with a pattern for the next problem.
Thank you! i have searched since hours but not seen that hint.
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RE: Level 3
Oct 27, 2012 - 11:04:26 (14y 6d)
Oct 27, 2012 - 11:04:26 (14y 6d)
Here you have the definition (and difference between others) of non capturing group.
http://www.regular-expressions.info/refadv.html
Regards.
http://www.regular-expressions.info/refadv.html
Regards.
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