regex101: JavaScript Substitution Workspace

Pro

1st Alternative(?<=[a-z])(?=[A-Z])

Positive Lookbehind(?<=[a-z])

Character Class[a-z]

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

Positive Lookahead(?=[A-Z])

Character Class[A-Z]

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

2nd Alternative(?<=[a-zA-Z])(?=[0-9])

Positive Lookbehind(?<=[a-zA-Z])

Character Class[a-zA-Z]

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

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

Positive Lookahead(?=[0-9])

Character Class[0-9]

0-9one character from 0 (48₁₀) to 9 (57₁₀)

3rd Alternative(?<=[0-9])(?=[a-zA-Z])

Positive Lookbehind(?<=[0-9])

Character Class[0-9]

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Positive Lookahead(?=[a-zA-Z])

Character Class[a-zA-Z]

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

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

4th Alternative(?<=[a-zA-Z0-9])(?=[^a-zA-Z0-9])(?!(?:$s)?$)

Positive Lookbehind(?<=[a-zA-Z0-9])

Character Class[a-zA-Z0-9]

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

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

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Positive Lookahead(?=[^a-zA-Z0-9])

Negated Character Class[^a-zA-Z0-9]

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

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

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Negative Lookahead(?!(?:$s)?$)

Non-Capturing Group(?:\(s)?

?repeats the group contents below at most once:

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

sthe literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

5th Alternative(?<=[^a-zA-Z0-9])(?<!\()(?=[a-zA-Z0-9])

Positive Lookbehind(?<=[^a-zA-Z0-9])

Negated Character Class[^a-zA-Z0-9]

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

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

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Negative Lookbehind(?<!\()

Positive Lookahead(?=[a-zA-Z0-9])

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

26 tokens

Regular Expression

(?<=[a-z])(?=[A-Z])|(?<=[a-zA-Z])(?=[0-9])|(?<=[0-9])(?=[a-zA-Z])|(?<=[a-zA-Z0-9])(?=[^a-zA-Z0-9])(?!(?:\(s)?\))|(?<=[^a-zA-Z0-9])(?<!\()(?=[a-zA-Z0-9])

Unit Tests

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