Regular Expressions 101

Pro

Non-Capturing Group(?:\b|(?<=[a-z]))

1st Alternative\b

\ba Unicode word boundary

2nd Alternative(?<=[a-z])

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

Character Class[a-z]

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

Non-Capturing Group(?:ShFrm|LgFrm|Auto)

1st AlternativeShFrm

ShFrmthe literal text ShFrm (case sensitive)

2nd AlternativeLgFrm

LgFrmthe literal text LgFrm (case sensitive)

3rd AlternativeAuto

Autothe literal text Auto (case sensitive)

Positive Lookahead(?=[A-Z]|\b)

1st Alternative[A-Z]

Character Class[A-Z]

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

2nd Alternative\b

\ba Unicode word boundary

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

(?:\b|(?<=[a-z]))(?:ShFrm|LgFrm|Auto)(?=[A-Z]|\b)

New

ShFrmLgFrm should be replaced Automatically
Auto
AutoLgFrm

ShFrmLgFrm should be replaced Automatically
Auto
AutoLgFrm