Regular Expressions 101

Pro

Character Class[Uu]

Uthe literal U (85₁₀ / 125₈ / 55₁₆) (case sensitive)

uthe literal u (117₁₀ / 165₈ / 75₁₆) (case sensitive)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Group 1(.*[^0-9_][0-9]*)

.*any character (except for line terminators), repeated any number of times

Negated Character Class[^0-9_]

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

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Character Class[0-9]*

*matches any number of characters from the set below:

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

Group 2(_[0-9]+)?

?repeats the group contents below at most once:

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

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.

25 tokens

[Uu]_(.*[^0-9_][0-9]*)(_[0-9]+)?$

New

u_CLR_REQ_SUP_00
u_CLR_REQ_SUP_0
u_PTO_AVDD_3P3_0
u_PTO_0
u_PTO
u_BTNI

u_CLR_REQ_SUP_00
u_CLR_REQ_SUP_0
u_PTO_AVDD_3P3_0
u_PTO_0
u_PTO
u_BTNI