Regular Expressions 101

Pro

1st Alternative(?:(?<=^\[| \[)[^\[\]]*)

Non-Capturing Group(?:(?<=^\[| \[)[^\[\]]*)

Positive Lookbehind(?<=^\[| \[)

1st Alternative^\[

^start of line

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

2nd Alternative \[

the literal (32₁₀ / 40₈ / 20₁₆)

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

Negated Character Class[^\[\]]*

*matches any number of characters outside the set below:

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

2nd Alternative(?:(?<=\] )[^\[\]]*$)

Non-Capturing Group(?:(?<=\] )[^\[\]]*$)

Positive Lookbehind(?<=\] )

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

Negated Character Class[^\[\]]*

*matches any number of characters outside the set below:

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

$end of line

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

Regular Expression

(?:(?<=^\[| \[)[^\[\]]*)|(?:(?<=\] )[^\[\]]*$)

New

[2021-03-10 00:13:32.901] [DefaultDispatcher-worker-2 @coroutine#3] [DEBUG] [4231c006d9083a302fce59d5f0957226] [42c5ac3c0acfc68d] [GreeterImpl] Hello John

Extraction

[2021-03-10 00:13:32.901] [DefaultDispatcher-worker-2 @coroutine#3] [DEBUG] [4231c006d9083a302fce59d5f0957226] [42c5ac3c0acfc68d] [GreeterImpl] Hello John