CODEWITHSUNDEEP
regexstring
donguy76
donguy76

Reputation: 640

Find starting character(s) and special characters in a String

I am new to RegEx and need to come up with a RegEx that will find matching character(s) in a String.

The possible strings that I could get are:

DFG-2344KG
4GGRTE/345
9TTRRE-547
7TTRRE-547
T89FGFGD+9

So what I want is a RegEx that will check to see if the string starts with DFG or 4 or 7 or T AND it does only have "-" for special characters other than alphanumeric characters.

So from the above list of strings, only 9TTRRE-547 will be a valid string.

I am looking for a RegEx that can do that for me. So far I came up with:

^(DFG|T|4|7)

The above RegEx correctly finds the invalid starting character(s). Now the challenge is finding a special character other than "-" that can happen anywhere in the string.

Any suggestions?

Upvotes: 1

Views: 62

Answers (1)

fedorqui
fedorqui

Reputation: 290455

I would try with:

^(DFG|4|7|T)[A-Z0-9-]+$

It is exactly what you have so far together with [A-Z0-9-]+ to indicate: "any alpha numeric character or -. By saying + we mean that it occur one or many times.

Then, $ to indicate end of line.

You can see it working in https://regex101.com/r/mX5kV8/1 with these matches:

DFG-2344KG
7TTRRE-547
7TTRRE547

Upvotes: 1

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