Regular Expressions 101

Pro

Negative Lookbehind(?<!\S)

\Sany character that is not Unicode whitespace

Negated Character Class[^.]*

*matches any number of characters outside the set below:

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?:(?:\.\d)[^.]*)*

*repeats the group contents below any number of times:

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

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\da Unicode decimal digit

Negated Character Class[^.]*

*matches any number of characters outside the set below:

.the literal . (46₁₀ / 56₈ / 2E₁₆)

examplethe literal text example (case sensitive)

Negated Character Class[^.]*

*matches any number of characters outside the set below:

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?:(?:\.\d)[^.]*)*

*repeats the group contents below any number of times:

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

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\da Unicode decimal digit

Negated Character Class[^.]*

*matches any number of characters outside the set below:

.the literal . (46₁₀ / 56₈ / 2E₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

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

(?<!\S)[^.]*(?:(?:\.\d)[^.]*)*example[^.]*(?:(?:\.\d)[^.]*)*\.

New

Hello. This is 4.815 an example. This is an example. This is an 4.815 example.

Hello. This is 4.815 an example. This is an example. This is an 4.815 example.