Regular Expressions 101

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

Group 1(Str\d+)

Strthe literal text Str (case sensitive)

\d+a digit, repeated at least once

Positive Lookahead(?=[^\[\]]*\])

Negated Character Class[^\[\]]*

*matches any number of characters outside the set below:

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

Global pattern flags

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

U modifier: Ungreedy. Quantifiers are lazy by default. A trailing ? makes a quantifier greedy

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

.*(Str\d+)(?=[^\[\]]*\])

New

a b c d [a b c Str1 d e f Str2 g h i Str3 ] e f g Str4 [Str5 a b c Str6 d] h i [ h i ]