Regular Expressions 101

Explanation

Pro

Group 1(.{1,40})

.{1,40}any character (except for line terminators), repeated between 1 and 40 times

\sany whitespace character

.*any character (except for line terminators), repeated any number of times

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.

27 tokens

(.{1,40})\s.*

This is some text and it splits if  it goes over the word boundary at 40 characters.

This is some text and it splits if  it goes over the word boundary at 40 characters.