Regular Expressions 101

1st Alternative^((?! - ).+?(?= - ) - ){2}(*SKIP)(*F)

^start of line

Group 1((?! - ).+?(?= - ) - ){2}

{2}repeats the group contents below exactly 2 times:

Negative Lookahead(?! - )

- the literal text -

.+?any character (except for line terminators), repeated at least once

Positive Lookahead(?= - )

- the literal text -

(*SKIP)acts like (*PRUNE), but the next unanchored match attempt starts where (*SKIP) was reached instead of at the next subject character

(*F)forces the current match attempt to fail at this position

2nd Alternative -

- the literal text -

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.

Search reference

Regular Expression

^((?! - ).+?(?= - ) - ){2}(*SKIP)(*F)| -

New

Hello - world - I am a good - guy and want to - save - the - world
Hello - wor  ld - I am a good - guy and want to - save - the - world
Hello - wo43rld - I am a good - guy and want to - save - the - world
Hello - world 2.0 - I am a good - guy and want to - save - the - world
Hello - world $%& - I am a good - guy and want to - save - the - world

Substitution

|