Regular Expressions 101

\w{10}any word character, repeated exactly 10 times

Positive Lookahead(?=\w)

\wany word character

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

\w{10}(?=\w)

New

Pneumonoultramicroscopicsilicovolcanoconiosis is a really long word
It's a name that has been invented for a lung disease caused by breathing in very small pieces of ash or dust
Pneumono refers to the lung. Ultra means extremely, microscopic means tiny, silica is sand, volcano is self-evident, and coniosis is scarring.

Regular Expression

Substitution