Regular Expressions 101

^start of line

Group 1((?!some|bad|words).)*

*repeats the group contents below any number of times:

Negative Lookahead(?!some|bad|words)

1st Alternativesome

somethe literal text some (case sensitive)

2nd Alternativebad

badthe literal text bad (case sensitive)

3rd Alternativewords

wordsthe literal text words (case sensitive)

.any character (except for line terminators)

$end of line

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

Regular Expression

^((?!some|bad|words).)*$

New

This should match
This bad string should not match
hello bad
hello 
this is some

This should match
This bad string should not match
hello bad
hello 
this is some