Regular Expressions 101

^start of line

Group 1(\w+(?: \w+)*(?: $[^()]*$)?)

\w+a Unicode word character, repeated at least once

Non-Capturing Group(?: \w+)*

*repeats the group contents below any number of times:

the literal (32₁₀ / 40₈ / 20₁₆)

\w+a Unicode word character, repeated at least once

Non-Capturing Group(?: $[^()]*$)?

?repeats the group contents below at most once:

the literal (32₁₀ / 40₈ / 20₁₆)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Negated Character Class[^()]*

*matches any number of characters outside the set below:

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

Group 2(\d+|[¼½¾])

1st Alternative\d+

\d+a Unicode decimal digit, repeated at least once

2nd Alternative[¼½¾]

Character Class[¼½¾]

¼the literal ¼ (188₁₀ / 274₈ / BC₁₆)

½the literal ½ (189₁₀ / 275₈ / BD₁₆)

¾the literal ¾ (190₁₀ / 276₈ / BE₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

Group 3(\w+(?: \w+)*)

\w+a Unicode word character, repeated at least once

Non-Capturing Group(?: \w+)*

*repeats the group contents below any number of times:

the literal (32₁₀ / 40₈ / 20₁₆)

\w+a Unicode word character, repeated at least once

$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

^(\w+(?: \w+)*(?: \([^()]*\))?) (\d+|[¼½¾]) (\w+(?: \w+)*)$

New

A sample string 20 something
Some text (just as 1 example) 2 more words
Some text (just as ¼ example) ¼ more words
A sample string ½ something

Some text (just as ¼ example) ¼ more words

Extraction

A sample string 20 something
Some text (just as 1 example) 2 more words
Some text (just as ¼ example) ¼ more words
A sample string ½ something

Some text (just as ¼ example) ¼ more words