Pattern

[mtyoung]

i have a Pattern ([_a-zA-Z]+[_0-9a-zA-Z-/]*[_0-9a-zA-Z]+)
would catch general valid .... let said uri without file extension
how can modify the pattern so that i would not match pattern ... let said ... "abc/ccd"?

[faisalcmpm]

Well, ([_0-9a-zA-Z-/]*) is enough for your business.
Now if u dont want "/" in your pattern just remove it
i.e. ([_0-9a-zA-Z-]*)

[mtyoung]

faisalcmpm... why [_0-9a-zA-Z-/]* is enough? we should not accept input like "///aaa///aaa//"
if remove "/", it can only handle the last part of uri... you know...

current situation is "abc/ccd" matches [_a-zA-Z]+[_0-9a-zA-Z-/]*[_0-9a-zA-Z]+
but i want to modify the pattern so that "abc/ccd" will not match but "abcd/ccd" still match the pattern

[faisalcmpm]

Sorry..
The thing is that am not that much expert in URI syntax.
Still i didn't get your actual issue.
U wants to mach "abc/ccd" but not "abcd/ccd" ,
means u want to restrict the alphabet count to 3?

[mtyoung]

not related to uri syntax...

i want to match most of pattern, ([_a-zA-Z]+[_0-9a-zA-Z-/]*[_0-9a-zA-Z]+)
but in some of special pattern... may be a123/ccd, gae24edwegt34r/546/3246/1312 , i want them not to match

so... my question is how to modify the ([_a-zA-Z]+[_0-9a-zA-Z-/]*[_0-9a-zA-Z]+) pattern, so that so pattern(self define maybe d25/232/afasdf/dfa will not match it)

[OrangeDog]

For a specific example, just handle them outside of the pattern - i.e. if you match one then ignore it.
There's nothing you can do in the pattern unless you can characterise the pattern of strings you want to exclude.

[faisalcmpm]

I agree with OrangeDog.
U have to have a kind of similarity in those inputs which u want to exclude. Then only u can take advantage of Pattern

[mtyoung]

[^snv] will not include s, n, v
so is there any method to exculde String, not char?

[OrangeDog]

In short, no. Regular expression work on a character-by-character basis.

[mtyoung]

ok... thanks a lot