Regular Expressions 101

Pro

Negative Lookahead(?!\d{4}[:\s\.,])

\d{4}a digit, repeated exactly 4 times

Character Class[:\s\.,]

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\sany whitespace character

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Group 1(\d*\b[\.,]?\d+)

\d*a digit, repeated any number of times

\ban ASCII word boundary

Character Class[\.,]?

?matches at most one character from the set below:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\d+a digit, repeated at least once

Negative Lookahead(?!\d*? (?:wordB))

\d*?a digit, repeated any number of times

the literal (32₁₀ / 40₈ / 20₁₆)

Non-Capturing Group(?:wordB)

wordBthe literal text wordB (case sensitive)

Negative Lookahead(?!\d*?(?:charA))

\d*?a digit, repeated any number of times

Non-Capturing Group(?:charA)

charAthe literal text charA (case sensitive)

Group 2((?!\b[charB])(?!\d+))

Negative Lookahead(?!\b[charB])

\ban ASCII word boundary

Character Class[charB]

cthe literal c (99₁₀ / 143₈ / 63₁₆) (case sensitive)

hthe literal h (104₁₀ / 150₈ / 68₁₆) (case sensitive)

athe literal a (97₁₀ / 141₈ / 61₁₆) (case sensitive)

rthe literal r (114₁₀ / 162₈ / 72₁₆) (case sensitive)

Bthe literal B (66₁₀ / 102₈ / 42₁₆) (case sensitive)

Negative Lookahead(?!\d+)

\d+a digit, repeated at least once

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.

26 tokens

(?!\d{4}[:\s\.,])(\d*\b[\.,]?\d+)(?!\d*? (?:wordB))(?!\d*?(?:charA))((?!\b[charB])(?!\d+))

New

4.5 $55 1,200 wordA 3 sometext 2 wordB sometext 9charA sometext charB21.6 sometext 11/10/22