Regular Expressions 101

Pro

Negative Lookbehind(?<!\*)

\*the literal * (42₁₀ / 52₈ / 2A₁₆)

Group 1(\*)

\*the literal * (42₁₀ / 52₈ / 2A₁₆)

Group 2([^ ][^*\n]*?)

Negated Character Class[^ ]

the literal (32₁₀ / 40₈ / 20₁₆)

Negated Character Class[^*\n]*?

*?matches any number of characters outside the set below:

*the literal * (42₁₀ / 52₈ / 2A₁₆)

\na line-feed (newline) character (ASCII 10)

Group 3(\*)

\*the literal * (42₁₀ / 52₈ / 2A₁₆)

Negative Lookahead(?!\*)

\*the literal * (42₁₀ / 52₈ / 2A₁₆)

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

(?<!\*)(\*)([^ ][^*\n]*?)(\*)(?!\*)

New

this is markdown with some *italic text*

(first \1)\2(second \3)

this is markdown with some *italic text*