CODEWITHSUNDEEP
regexscala
Im89
Im89

Reputation: 149

develop a regex expression that matchs caracters, numbers or special caracters

I want to develop a regex expression that matchs caracters, numbers or special caracters(!#$%&'*+-/=?^_`{|\}~)

For example, valid strings are: 

aaa456
4567777ertttt
!#$%&'*+-/=?^_`{|\}~ert788888

I have written this pattern :

val regex = "?: [a-zA-Z0-9]*[!#$%&'*+-/=?^_`{|\}~]*"

but it does not work in some cases : 

!#$%&'*+-/=?^_`{|\}~ert788888

Have someone idea about that ?

Upvotes: 0

Views: 77

Answers (1)

jwvh
jwvh

Reputation: 51271

OK, I might have come up with a pattern that meets your requirements as stated in the comments (the question itself lacks sufficient information to be useful).

This pattern matches any string that starts with a character that is not a dot, and that is followed by one or more characters that are either A) not a dot, or B) a dot that is not followed by a dot.

"[^.]([^.]|.(?!\\.))+"

With this you can test/validate strings of interest.

testString matches "[^.]([^.]|.(?!\\.))+"  //returns true/false

Upvotes: 2

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