Regular Expressions 101

Non-Capturing Group(?:(?<=^)|(?<=\n))

1st Alternative(?<=^)

Positive Lookbehind(?<=^)

^start of string

2nd Alternative(?<=\n)

Positive Lookbehind(?<=\n)

\na line-feed (newline) character (ASCII 10)

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

Parameterthe literal text Parameter (case sensitive)

.*any Unicode character (except for line terminators), repeated any number of times

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

(?:(?<=^)|(?<=\n))\s*Parameter.*

New

Parameter: A
%Parameter: B
  %  Parameter: C
 Parameter: D %the best parameter

Parameter: A
%Parameter: B
  %  Parameter: C
 Parameter: D %the best parameter