Regular Expressions 101

^start of line

dev_the literal text dev_ (case sensitive)

Character Class[0-9]+

+matches at least one character from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Non-Capturing Group(?:.[0-9]+)+

+repeats the group contents below at least once:

.any character (except for line terminators)

Character Class[0-9]+

+matches at least one character from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

$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

^dev_[0-9]+(?:.[0-9]+)+$

New

dev_1.0
dev_1.1
dev_1.2
dev_1.2.3
dev_1.2.3.4
dev1.2