Regular Expressions 101

Explanation

Pro

\ba Unicode word boundary

Negative Lookahead(?!Foo\b|bar\b)

1st AlternativeFoo\b

Foothe literal text Foo (case sensitive)

\ba Unicode word boundary

2nd Alternativebar\b

barthe literal text bar (case sensitive)

\ba Unicode word boundary

Character Class[A-Za-z]+

+matches at least one character from the set below:

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

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

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(?!Foo\b|bar\b)[A-Za-z]+

New

Hey, Foo, we can meet at the bar.
Hey, Foobar, we can meet at the bar.

Hey, Foo, we can meet at the bar.
Hey, Foobar, we can meet at the bar.