Regular Expressions 101

Pro

Positive Lookbehind(?<=\s)

\sa Unicode whitespace character

Positive Lookahead(?=\[)

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

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

(?<=\s)(?=\[)

New

[json][17:50 timestamp] hello [mike18][18:06 timestamp] hi

[json][17:50 timestamp] hello [mike18][18:06 timestamp] hi