Regular Expressions 101

Pro

Positive Lookbehind(?<=\[)

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

Character Class[a-zA-Z]*

*matches any number of characters from the set below:

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

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

Character Class[A-Z]

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

Character Class[a-zA-Z]*

*matches any number of characters from the set below:

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

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

Positive Lookahead(?=\])

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

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

(?<=\[)[a-zA-Z]*[A-Z][a-zA-Z]*(?=\])

[abcDe]
[abcde]
[G]
[a]
[kgdfshgGbdjDsfgShdf]

[abcDe]
[abcde]
[G]
[a]
[kgdfshgGbdjDsfgShdf]