Replace carriage return if it doesn't have a matching line feed

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I'm rusty on my Regex and in a time crunch. I need to remove carriage returns from a string but NOT carriage return-line feeds.

It's for a mirth engine so it's javascript...any one help me out?

What I have tried:

lots of google, but not finding my specific scenario.

message = message.replace(???, "");

Posted 13-Sep-19 6:22am

Kschuler

Updated 13-Sep-19 8:04am

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2 solutions

Solution 2

Just a few interesting links to help building and debugging RegEx.
Here is a link to RegEx documentation:
perlre - perldoc.perl.org[^]
Here is links to tools to help build RegEx and debug them:
.NET Regex Tester - Regex Storm[^]
Expresso Regular Expression Tool[^]
RegExr: Learn, Build, & Test RegEx[^]
Online regex tester and debugger: PHP, PCRE, Python, Golang and JavaScript[^]
This one show you the RegEx as a nice graph which is really helpful to understand what is doing a RegEx: Debuggex: Online visual regex tester. JavaScript, Python, and PCRE.[^]
This site also show the Regex in a nice graph but can't test what match the RegEx: Regexper[^]

Posted 13-Sep-19 8:05am

Patrice T

Comments

CPallini 16-Sep-19 3:30am

"Teach a man to fish, and you feed him for a lifetime",
5.

Patrice T 16-Sep-19 6:55am

Thank you

Kschuler 1-Oct-19 9:43am

Nice. I lost all my regex bookmarks a while back and haven't gotten around to re-bookmarking those tools. Thanks!

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CPallini · Accepted Answer · 2019-09-13T06:53:00

Solution 1

Try

JavaScript

message=message.replace(/\n(?!\r)/,"")

Posted 13-Sep-19 6:53am

CPallini

Comments

Patrice T 13-Sep-19 14:05pm

+5, directly to the point.

CPallini 16-Sep-19 3:29am

Thank you.