Welcome to the Lounge

3-Jul-23 7:03

What's a "CP dashboard"?

a prime use of regex

BernardIE53172-Jul-23 22:47

BernardIE5317

2-Jul-23 22:47

learned some regex via link below .
this regex identifies prime numbers (reaction) - YouTube[^]

[update 7/4/2023]
i received link below re/ means to generate primes . am writing code now to test .
The Prime Number Equations - First Time in History - YouTube[^]

modified 4-Jul-23 17:40pm.

Jeremy Falcon3-Jul-23 6:26

3-Jul-23 6:26

That's awesome. I wish more people would master regex. It really does set you apart as a dev.

Jeremy Falcon

PIEBALDconsult3-Jul-23 7:05

3-Jul-23 7:05

Jeremy Falcon wrote:
set you apart as a dev

Not everyone values that. Sigh | :sigh:

Far too many devs think that group-think is best.

Jeremy Falcon3-Jul-23 7:19

3-Jul-23 7:19

Sad but true. Sigh | :sigh:

Jeremy Falcon

obermd3-Jul-23 16:33

obermd

3-Jul-23 16:33

It can also make your code harder for the next developer to understand. Simple regex can be handled by most devs, but some of the more complex regex strings are inscrutable even to the original author.

Jeremy Falcon4-Jul-23 4:31

4-Jul-23 4:31

Like anything in development, if you abuse it then it’s a problem.

But, if you have a dev that doesn’t want to learn… Then fire dev that doesn't want to learn and hire one that can.

These days there are so many parsers to explain patterns there’s no reason.

Jeremy Falcon

GuyThiebaut3-Jul-23 21:21

GuyThiebaut

3-Jul-23 21:21

It's something I use when I have to but have it on my list to lean more about.

I could have really used that knowledge recently when I wanted to search for any stored procedure called in the code where one of the parameters supplied is a Boolean value.

“That which can be asserted without evidence, can be dismissed without evidence.”

― Christopher Hitchens

modified 4-Jul-23 3:38am.

Jeremy Falcon4-Jul-23 4:37

4-Jul-23 4:37

Regex is great for scripts, rudimentary parsers, input validation, etc. So, props for putting it on the todo list at least. Already puts you ahead.

It may look like Klingon to the untrained eye… but if you’re good at it you’ll never have a problem again with moving around data / transformation and so on. Especially when a full-fledged app isn't called for.

Jeremy Falcon

GuyThiebaut13-Jul-23 22:08

GuyThiebaut

13-Jul-23 22:08

Thanks Jeremy,

I have now started using it more in searches and it has made something of a difference.

I really should have been making use of it more, but like you say the Klingon-like appearance puts a lot of us off from using it.
I have found a cheat sheet which helps a lot and using it both as practice and in use.

The interesting part I have found so far is that different text search engines(i.e. 'find' applications) process end of line characters differently, so using the right tool makes a difference too - AgentRansack is not great with end-of-line characters in regular expressions but VS Code seems to work with \r and \n.

“That which can be asserted without evidence, can be dismissed without evidence.”

― Christopher Hitchens

Jeremy Falcon14-Jul-23 3:47

14-Jul-23 3:47

GuyThiebaut wrote:
The interesting part I have found so far is that different text search engines(i.e. 'find' applications) process end of line characters differently, so using the right tool makes a difference too - AgentRansack is not great with end-of-line characters in regular expressions but VS Code seems to work with \r and \n.

Yeah, if I had one gripe about regex it would be that. If it's PCRE compatible regex you're learning though, that'll make it easy enough to adapt to the minor differences in implementation. Just know, if you're using tools like grep or sed in Linux, you'll need to enable extended regex to get something that's more close to PCRE.

Jeremy Falcon

PIEBALDconsult3-Jul-23 7:06

3-Jul-23 7:06

Not clicking that.

I don't see why there would be a video about it rather than an article.

Jeremy Falcon3-Jul-23 7:20

3-Jul-23 7:20

It's a video explaining an article. We just went meta up in here. Laugh | :laugh:

Jeremy Falcon

PIEBALDconsult3-Jul-23 7:21