Regular Expressions 101

Pro

1st Alternative(?<=$)\d+(?:\.\d+)?(?=%$)

Positive Lookbehind(?<=\()

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

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

Non-Capturing Group(?:\.\d+)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

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

Positive Lookahead(?=%\))

%the literal % (37₁₀ / 45₈ / 25₁₆)

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

2nd Alternative\d+(?:\.\d+)?(?=\s*\[[^][]*])

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

Non-Capturing Group(?:\.\d+)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

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

Positive Lookahead(?=\s*\[[^][]*])

\s*a Unicode whitespace character, repeated any number of times

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

Negated Character Class[^][]*

*matches any number of characters outside the set below:

]the literal ] (93₁₀ / 135₈ / 5D₁₆)

[the literal [ (91₁₀ / 133₈ / 5B₁₆)

]the literal ] (93₁₀ / 135₈ / 5D₁₆)

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

(?<=\()\d+(?:\.\d+)?(?=%\))|\d+(?:\.\d+)?(?=\s*\[[^][]*])

1112 (65.45%)
4.00 [3.00 - 4.50]