Regarding a GREAT site for understanding and Visualizing regex patterns.


 
Thread Tools Search this Thread
Top Forums Programming Regarding a GREAT site for understanding and Visualizing regex patterns.
# 1  
Old 09-15-2019
Regarding a GREAT site for understanding and Visualizing regex patterns.

Hello All,

While googling on regex I came across a site named Regulex Regulex:JavaScript Regular Expression Visualizer
I have written a simple regex ^(a|b|c)([^@]*)@(.*) and could see its visualization; one could export it too, following is the screen shot.

Image

It may help us for understanding regex expressions. I am also new to it and exploring it.

Thought to share on forums Smilie

Thanks,
R. Singh

Last edited by RavinderSingh13; 09-15-2019 at 01:30 PM..
These 8 Users Gave Thanks to RavinderSingh13 For This Post:
# 2  
Old 09-16-2019
Thanks Ravinder,

I generally use various online REGEX checkers when when I am writing REGEX expressions, mostly REGEX for PHP code.

This is the first one I have seen that has the "visualization" done like this, thanks for sharing.

The REGEX checkers I like the best have always been the ones where we can cut-and-paste our text into the checker and then see
the resulting matches so we can easily test the input versus the output when debugging.

Next time I need a REGEX I will also try this visualization tool.

Thanks for sharing.
This User Gave Thanks to Neo For This Post:
# 3  
Old 09-16-2019
The idea is neat I think, but it did not correctly interpret the first thing I threw at it.
It does not seem to like POSIX character classes:
Code:
^[0-9A-Z[:space:]]
^[[:alpha:]]

--
Never mind, this site is about Javascript regex only, which does not support POSIX character classes..

Last edited by Scrutinizer; 09-16-2019 at 02:36 AM..
These 3 Users Gave Thanks to Scrutinizer For This Post:
# 4  
Old 09-16-2019
Someone told me not that long ago that the next big thing in computing are Regular Expressions.
Not needing such things in what I do using computers I thought, "Why, surely it is AI?"
Then I joined here and seeing you guys using them gobsmacked me. I had no idea how important BREs and EREs were until coming on here.

However a tool like that makes them easy to understand.

(Whilst in Perl mode I will learn how to use Perl's REs.)

Thanks Ravinder, great find...
This User Gave Thanks to wisecracker For This Post:
Login or Register to Ask a Question

Previous Thread | Next Thread

6 More Discussions You Might Find Interesting

1. What is on Your Mind?

Virtualized Cyberspace - Visualizing Patterns & Anomalies for Cognitive Cyber Situational Awareness

Our team just published this technical report on ResearchGate: Virtualized Cyberspace - Visualizing Patterns & Anomalies for Cognitive Cyber Situational Awareness ABSTRACT ACKNOWLEDGMENTS Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International Public License This... (0 Replies)
Discussion started by: Neo
0 Replies

2. Shell Programming and Scripting

Need help understanding this Regex.

Hi everyone, This regex looks simple and yet it doesn't make sense how it's manipulating the output. ifconfig -a eth0 Link encap:Ethernet HWaddr 00:0c:49:c2:35:6v inet addr:192.16.1.1 Bcast:192.168.226.255 Mask:255.255.255.0 inet6 addr:... (2 Replies)
Discussion started by: xcod3r
2 Replies

3. Shell Programming and Scripting

Need Quick help on Understanding sed Regex

Hi Guys, Could you please kindly explain what exactly the below SED command will do ? I am quite confused and i assumed that, sed 's/*$/ /' 1. It will remove tab and extra spaces .. with single space. The issue is if it is removing tab then it should be Î right .. please assist.... (3 Replies)
Discussion started by: Nandy
3 Replies

4. Shell Programming and Scripting

Regex patterns

can someone please confirm for me if i'm right: the pattern: ORA-0*(600?|7445|4) can someone give me an idea of all the entries the pattern above will grab from a database log file? is it looking for the following strings?: ORA-0600 ORA-7445 4) (2 Replies)
Discussion started by: SkySmart
2 Replies

5. Shell Programming and Scripting

Understanding regex behaviour when using quantifiers

# echo "Teest string" | sed 's/e*/=>replaced=</' =>replaced<=Teest string So, in the above code , sed replaces at the start. does that mean sed using the pattern e* settles to zero occurence ? Why sed was not able to replace Teest string. # echo "Teest string" | sed 's/e*//g' Tst string ... (6 Replies)
Discussion started by: chidori
6 Replies

6. Shell Programming and Scripting

Understanding a regex

Hi, Please help me to understand the bold segments in the below regex. Both are of same type whose meaning I am looking for. find . \( -iregex './\{6,10\}./src' \) -type d -maxdepth 2 Output: ./20111210.0/src In continuation to above: sed -e 's|./\(*.\{1,3\}\).*|\1|g' Output: ... (4 Replies)
Discussion started by: vibhor_agarwali
4 Replies
Login or Register to Ask a Question