RegExr
RE2
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RegExr | RE2 | |
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579 | 49 | |
9,530 | 8,607 | |
- | 1.0% | |
0.0 | 8.9 | |
24 days ago | 10 days ago | |
JavaScript | C++ | |
GNU General Public License v3.0 only | BSD 3-clause "New" or "Revised" License |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
RegExr
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Hot Springs
When thinking about how I might compare an arrangement to the contiguous group of damaged springs, I used regexr.com to experiment with very specific regexs that used the numbers.
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Demystifying Regular Expressions (Regex): A Chat Sheet Guide
There are plenty of online regex tools to test and experiment with regex patterns. Some popular ones include RegExr, RegEx101, and RegexPlanet.
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Camel Cards
Using regexr.com it at least appears to work as expected.
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[2023 Day 2] [Python] Stuck on the first task
If you are going to use RE's, use something like https://regexr.com/ to double check that they're doing what you want. I was suspicious of your 'cols = re.findall(r'\d+ .....', i)' line, and indeed it does miss some columns. You should rethink your column detection, and either not use REs or learn how to use capture groups and \w. There would then be no reason to use yet another RE in your column iterator to extract the numbers which you've already detected.
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2023 Day 2 Part A [Java] regex pattern not matching
First time posting here, let me know if I need to edit post to conform to any rules. My issue is that I'm trying to match regex pattern to separate out the number of cubes drawn and its color but my Matcher object seems to not be returning any matches so it's throwing a no match found exception when I try to call digitMatcher.group(). I have tested my regex pattern on sites like regexr and it seems to pass there but it's not working for some reason here. I use the same type of regex on day one and it work there so I'm not sure where my regex pattern is failing here. I'm talking about specifically in my isGameValid() method where I create a matcher base on a pattern I made above. Through debugging I know that I separated the string color pairing correctly and that my Matcher object has the correct regex pattern, it's just not matching for some reason. Any help would be appreciated. Code below:
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Trebuchet?!
Regexr has been an invaluable tool as a beginner.
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10 Lesser-Known Tools and Websites to Spice Up Your Developer Toolbox
RegExr simplifies working with regular expressions. This online tool provides a visual interface for building and testing regex patterns in real-time, making regex less intimidating.
- What regex flavour does vscode use in language-configuration.json
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Regex not working
Ho did you arrive at the regex? I usually use a website to , such as https://regex101.com/, https://regexr.com/, https://regex-generator.olafneumann.org/ in combination of each other, as some explain better than the other.
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Capture the first instance, but don't stop?
I pulled this into regexr.com and it yielded the same results except it removed :41:
RE2
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C Is the Greenest Programming Language
Looking at the benchmark where C++ is worst compared to other languages, it's depending on the library used. I would guess if they used Google's re2 Regex library instead of Boost's, the result would be different.
https://github.com/greensoftwarelab/Energy-Languages/blob/ma...
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what does this + do in the regular expression "(^A-Za-z)+"
That page says it just includes "some of the most common special characters", and following the link to the Examples page in turn includes a link to the full list.
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On a Great Interview Question
Python uses backtracking, so this probably isn't O(n), especially with the ability to choose the dictionary.
But with there are non-backtracking matchers which would make this O(n). Here's re2 from https://github.com/google/re2 :
>>> import re2
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RE2 VS hyperscan - a user suggested alternative
2 projects | 17 Mar 2023
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hyperscan VS RE2 - a user suggested alternative
2 projects | 17 Mar 2023
RE2 is a Google regular expression library
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Projects ideas to learn C++/OOP
google's regex library: https://github.com/google/re2
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Regex: is there a difference between * and {0,}, as well as + and {1,}?
I am currently working with Regex, specifically Re2, and was wondering if there is a real difference between the above expressions for repeated sub-regex.
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First release of SPVM::File::Spec - complex regular expressions, file tests, SPVM::Cwd, inheritance
I ported Google RE2, a regular expression library, to SPVM as Resource::Re2, and created SPVM::Regex, a wrapper for it.
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SPVM::File::Basename is released. This is the first module of SPVM using regular expressions.
I searched for I found that there is a Perl compatible regular expression called Google RE2. It is written in C++, and with Google RE2, I can use Perl-compatible regular expressions as a library.
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Ruby 3.2.0 Is from Another Dimension
Yes, but there is an interesting clarification here. RE2 has used the "caching" approach documented in the Ruby bug ticket linked for quite some time (since its birth?): https://github.com/google/re2/blob/954656f47fe8fb505d4818da1...
It is mentioned only briefly in Cox's article on regex matching in the wild. Look for the word "bitstate": https://swtch.com/~rsc/regexp/regexp3.html
I didn't know Perl had implemented this trick too.
The paper[1] cited in the Ruby bug ticket was published very recently. When I first read the Ruby bug ticket, I immediately wondered how they sidestepped the memory use problem. The paper's abstract seems to suggest there is some technique for doing so, as it rebuffs the idea of doing "full" memoization. Alas, I do not have access the paper. (Which is fucking ridiculous.)
What are some alternatives?
RegEx101 - This repository is currently only used for issue tracking for www.regex101.com
compile-time-regular-expressions - Compile Time Regular Expression in C++
RegExpBuilder
semver.c - Semantic version in ANSI C
Visual Studio Code - Visual Studio Code
Boost.Signals - Boost.org signals2 module
CyberChef - The Cyber Swiss Army Knife - a web app for encryption, encoding, compression and data analysis
libevil - The Evil License Manager
self-hosted - Sentry, feature-complete and packaged up for low-volume deployments and proofs-of-concept
constexpr-8cc - Compile-time C Compiler implemented as C++14 constant expressions
Regexly - WYSIWYG Regex playground for those who JavaScript
Cppcheck - static analysis of C/C++ code