Replacing strings within others using regex

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Hi,

Let's say I have the following string;

$('test')...;
$('test notatest')...;
$('test notatest notatest2')...;
alert('this test should not be replaced');

What's the best way using Regex to replace 'test' with something else, only where it appears within $(...)?

What I have tried:

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Posted 14-Jan-18 0:23am

User 13204940

Updated 14-Jan-18 1:19am

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Graeme_Grant 14-Jan-18 6:33am

Have you tried reading tutorials, documentation, or googling for the answer?

Please take the time to look at these links provided before posting questions:
* Basic Debugging with Visual Studio 2010 - YouTube[^]
* Some guidelines for posting questions in the forums[^]
* Tales from the Evil Empire - Asking questions is a skill[^]

[no name] 14-Jan-18 7:14am

Hmm. I don't remember asking for the regex, just for the best way using regex.

I wouldn't be here if I hadn't tried for several hours already.

Graeme_Grant 14-Jan-18 7:21am

Always a good idea to share what you have tried...

2 solutions

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OriginalGriff · Answer 1 · 2018-01-14T00:42:00

Solution 1

Try this:

(?<=\$\(')(test)(?=.*?'\))

Use Regex.Replace, and it will replace the "test" with your string.

If you are going to work with Regexes, then get a copy of Expresso[^] - it's free, and it examines and generates Regular expressions.

Posted 14-Jan-18 0:42am

OriginalGriff

Updated 14-Jan-18 0:43am

v2

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[no name] 14-Jan-18 7:18am

Excellent, thank you!

I'll have a look at Expresso, I've been meaning to find something which is capable of generating regex; I've only been using regex testers.

Patrice T · Answer 2 · 2018-01-14T01:19:00

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[^]
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.[^]

Replacing strings within others using regex

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Replacing strings within others using regex

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