Regular Expressions 101

Pro

\h*any horizontal whitespace character, repeated any number of times

\Ra newline sequence

Positive Lookahead(?=[a-z])

Character Class[a-z]

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

Negative Lookahead(?!or$)

orthe literal text or (case sensitive)

$end of line

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

Regular Expression

\h*\R(?=[a-z])(?!or$)

New

Books are an effective way to 
communicate across time, both from the past and into the future.

Chapter 3 
The Importance of Reading 
or
Literature is the most agreeable way of ignoring life

Substitution

Books are an effective way to 
communicate across time, both from the past and into the future.

Chapter 3 
The Importance of Reading 
or
Literature is the most agreeable way of ignoring life