Regular Expressions 101

^start of line

Non-Capturing Group(?:[tysjod].*|(?!0+$) *\d+ *$)

1st Alternative[tysjod].*

Character Class[tysjod]

tthe literal t (116₁₀ / 164₈ / 74₁₆) (case sensitive)

ythe literal y (121₁₀ / 171₈ / 79₁₆) (case sensitive)

sthe literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

jthe literal j (106₁₀ / 152₈ / 6A₁₆) (case sensitive)

othe literal o (111₁₀ / 157₈ / 6F₁₆) (case sensitive)

dthe literal d (100₁₀ / 144₈ / 64₁₆) (case sensitive)

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

2nd Alternative(?!0+$) *\d+ *$

Negative Lookahead(?!0+$)

0+the literal 0 (48₁₀ / 60₈ / 30₁₆) , repeated at least once

$end of line

*the literal (32₁₀ / 40₈ / 20₁₆) , repeated any number of times

\d+a digit, repeated at least once

*the literal (32₁₀ / 40₈ / 20₁₆) , repeated any number of times

$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

^(?:[tysjod].*|(?!0+$) *\d+ *$)

New

Test cases for matching:
yes
1
1010
 0 
Test cases for not matching:
no
0
00