Regular Expressions 101

Explanation

Pro

^start of line

Group 1([A-Za-z]+)

Character Class[A-Za-z]+

+matches at least one character from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

\s*any whitespace character, repeated any number of times

Group 2(\[?)

\[?optionally matches the literal [ (91₁₀ / 133₈ / 5B₁₆)

\s*any whitespace character, repeated any number of times

Group 3([A-Za-z]*)

Character Class[A-Za-z]*

*matches any number of characters from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

Group 4(\d*)

\d*a digit, repeated any number of times

\s*any whitespace character, repeated any number of times

Group 5(\]?)

\]?optionally matches the literal ] (93₁₀ / 135₈ / 5D₁₆)

\s*any whitespace character, repeated any number of times

$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

^([A-Za-z]+)\s*(\[?)\s*([A-Za-z]*)(\d*)\s*(\]?)\s*$

New

Abc[123]
Abc[]
Abc[xy33]
Abc
Abc [ 123 ]

Abc[123]
Abc[]
Abc[xy33]
Abc
Abc [ 123 ]