Regular Expressions 101

^start of line

Group 1([a-z]|\b-\b){1,30}

{1,30}repeats the group contents below between 1 and 30 times:

1st Alternative[a-z]

Character Class[a-z]

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

2nd Alternative\b-\b

\ban ASCII word boundary

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\ban ASCII word boundary

$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.

Search reference

Regular Expression

^([a-z]|\b-\b){1,30}$

New

ababab-asd
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
sssssssssssssssss-s-s-s-sss
sdsds-sd-sd-s-d-sd---sd