Regular Expressions 101

Group 1([[:alnum:]])

Character Class[[:alnum:]]

[:alnum:]an alphanumeric character [a-zA-Z0-9]

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 2([[:alnum:]])

Character Class[[:alnum:]]

[:alnum:]an alphanumeric character [a-zA-Z0-9]

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

([[:alnum:]])\.([[:alnum:]])

New

Names: $annie.bettie.cindy.dannie.ellie$. Only $a$ names. $a.b.c.d.e.f$.

\1