Regular Expressions 101

Pro

Group 1([A-Z]{4}-\w{6})

Character Class[A-Z]{4}

{4}matches exactly 4 characters from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\w{6}any word character, repeated exactly 6 times

Negative Lookahead(?!.*\1)

.*any character (except for line terminators), repeated any number of times

\1the text saved by group 1

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

25 tokens

([A-Z]{4}-\w{6})(?!.*\1)

New

this is an example of the desired regular expressions: BPOI-G8J7R9, BPOI-G8J7R9 and BPOI-E5Q8D2"

this is an example of the desired regular expressions: BPOI-G8J7R9, BPOI-G8J7R9 and BPOI-E5Q8D2"