Regular Expressions 101

^start of line

Negated Character Class[^a-zA-Z\d\r\n]*

*matches any number of characters outside the set below:

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

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

\da Unicode decimal digit

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

Non-Capturing Group(?:[a-zA-Z\d][^a-zA-Z\d\r\n]*){1,3}

{1,3}repeats the group contents below between 1 and 3 times:

Character Class[a-zA-Z\d]

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

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

\da Unicode decimal digit

Negated Character Class[^a-zA-Z\d\r\n]*

*matches any number of characters outside the set below:

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

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

\da Unicode decimal digit

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

$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

Regular Expression

^[^a-zA-Z\d\r\n]*(?:[a-zA-Z\d][^a-zA-Z\d\r\n]*){1,3}$

New

gut
ok
aa
na
N/A
x
c
Nil
wu
No.
E
A
I
k k
H
o
K
N
Y
Top
OK了
m
| yes
N/A |
t | T
t | T
| idk
| wsq
t | T
ｂ | n

ｂ | nnn
abcd
|a|b|c
|a|b|cd
a$%@#%#%#$%#%##$%b@#$#@$
a$%@#%#%#$%#%##$%b@#$#@$c@#$@#
a$%@#%#%#$%#%##$%b@#$#@$c@#$@#d