Regular Expressions

This page provides practical regular expression (regex) examples for common text manipulation tasks. Explanations and sample input/output are included for clarity.

Examples

Remove Dots and Aliases from Email Addresses

This regex removes dots from the local part of an email address and strips out any alias (the +something part):

(\.(?=[^@]*?@)|\+[^@]*?(?=@))

Double quote each line:

"^((.*)$)" => "<<"(.*?)>>"

Double quote each line in Notepad++:

You can save this as a macro for easy use.

AliceBlue
AntiqueWhite
Aqua
Aquamarine
Azure
Beige
Bisque
Black
BlanchedAlmond

Find (in regular expression mode):

(.+)

Replace with:

"\1"

This adds the quotes:

"AliceBlue"
"AntiqueWhite"
"Aqua"
"Aquamarine"
"Azure"
"Beige"
"Bisque"
"Black"
"BlanchedAlmond"

Find (in extended mode):

\r\n

Replace with (with a space after the comma, not shown):

, 

This is a work in progress https://how-to-learn-regex.netlify.app/tutorials/how-to-add-double-quotes-to-text-line-using-regex/