Regular Expressions 101

book_name:the literal text book_name: (case sensitive)

Group 1(.+?;)

.+?any character (except for line terminators), repeated at least once

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

author:the literal text author: (case sensitive)

Group 2(.+?)

.+?any character (except for line terminators), repeated at least once

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

Non-Capturing Group(?:author:(.+?);)?

?repeats the group contents below at most once:

author:the literal text author: (case sensitive)

Group 3(.+?)

.+?any character (except for line terminators), repeated at least once

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

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.

Search reference

Regular Expression

book_name:(.+?;)author:(.+?);(?:author:(.+?);)?

New

book_name:SoftwareEngineering;author:John;author:Smith;
book_name:DesignPatterns;author:Foo;author:Bar;
book_name:DesignPatterns;author:Foo;