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Google Keyword Rankings for : fast regex c
1
Regular Expression Matching Can Be Simple And Fast
https://swtch.com/~rsc/regexp/regexp1.html
This article reviews the good theory: regular expressions, finite automata, and a regular expression search algorithm invented by Ken Thompson in the mid-1960s.
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https://swtch.com/~rsc/regexp/regexp1.html
This article reviews the good theory: regular expressions, finite automata, and a regular expression search algorithm invented by Ken Thompson in the mid-1960s.
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2
How to write a very fast regex in C#. Best Practice - Medium
https://medium.com/@mohsen_rajabi/how-to-write-a-regex-very-fast-in-c-best-practice-875d386c0485
In this benchmark, you will see that Case 2 is faster than the others. Microsoft says to use Regex mode as Static, which is Case 1. Because it ...
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https://medium.com/@mohsen_rajabi/how-to-write-a-regex-very-fast-in-c-best-practice-875d386c0485
In this benchmark, you will see that Case 2 is faster than the others. Microsoft says to use Regex mode as Static, which is Case 1. Because it ...
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3
Benchmark of Regex Libraries
https://lh3lh3.users.sourceforge.net/reb.shtml
This benchmark tells me that python, although faster than perl in other applications, is not the right language for me. C vs. C++. I used PCRE's ...
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https://lh3lh3.users.sourceforge.net/reb.shtml
This benchmark tells me that python, although faster than perl in other applications, is not the right language for me. C vs. C++. I used PCRE's ...
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4
kokke/tiny-regex-c: Small portable regex in C - GitHub
https://github.com/kokke/tiny-regex-c
Small and portable Regular Expression (regex) library written in C. Design is inspired by Rob Pike's regex-code for the book "Beautiful Code" available ...
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https://github.com/kokke/tiny-regex-c
Small and portable Regular Expression (regex) library written in C. Design is inspired by Rob Pike's regex-code for the book "Beautiful Code" available ...
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5
How much faster are regular expressions processed in C/Java ...
https://stackoverflow.com/questions/30114763/how-much-faster-are-regular-expressions-processed-in-c-java-than-in-python
This is likely to depend more on the individual implementation than the language. Just for example, some patterns are O(N2) with some implementations, ...
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https://stackoverflow.com/questions/30114763/how-much-faster-are-regular-expressions-processed-in-c-java-than-in-python
This is likely to depend more on the individual implementation than the language. Just for example, some patterns are O(N2) with some implementations, ...
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6
Comparison of regular expression engines - Wikipedia
https://en.wikipedia.org/wiki/Comparison_of_regular_expression_engines
This is a comparison of regular expression engines. Contents. 1 Libraries; 2 Languages ... DEELX, RegExLab, C++, Proprietary. FREJ, Fuzzy Regular Expressions ...
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https://en.wikipedia.org/wiki/Comparison_of_regular_expression_engines
This is a comparison of regular expression engines. Contents. 1 Libraries; 2 Languages ... DEELX, RegExLab, C++, Proprietary. FREJ, Fuzzy Regular Expressions ...
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7
Regular Expression Performance Comparison - 1.33.1
https://www.boost.org/doc/libs/1_33_1/libs/regex/doc/vc71-performance.html
GRETA. The Boost regex library. Henry Spencer's regular expression library - this is provided for comparison as a typical non-backtracking implementation.
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https://www.boost.org/doc/libs/1_33_1/libs/regex/doc/vc71-performance.html
GRETA. The Boost regex library. Henry Spencer's regular expression library - this is provided for comparison as a typical non-backtracking implementation.
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8
What is wrong with std::regex? : r/cpp - Reddit
https://www.reddit.com/r/cpp/comments/e16s1m/what_is_wrong_with_stdregex/
I've seen numerous instances of community members stating that std::regex has bad ... Until C++20, you can use Howard's implementation from github, which is ...
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https://www.reddit.com/r/cpp/comments/e16s1m/what_is_wrong_with_stdregex/
I've seen numerous instances of community members stating that std::regex has bad ... Until C++20, you can use Howard's implementation from github, which is ...
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9
Best Practices for Regular Expressions in .NET - Microsoft Learn
https://learn.microsoft.com/en-us/dotnet/standard/base-types/best-practices
Learn how to create efficient, effective regular expressions in .NET. ... a compiled version of the regular expression from its cache. C#
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https://learn.microsoft.com/en-us/dotnet/standard/base-types/best-practices
Learn how to create efficient, effective regular expressions in .NET. ... a compiled version of the regular expression from its cache. C#
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10
What is faster Regex or a Loop in C#? | Sololearn
https://www.sololearn.com/Discuss/2840086/what-is-faster-regex-or-a-loop-in-c
What is faster Regex or a Loop in C#?. Lets say you want to find a character or another string inside a particular string, which one will do ...
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https://www.sololearn.com/Discuss/2840086/what-is-faster-regex-or-a-loop-in-c
What is faster Regex or a Loop in C#?. Lets say you want to find a character or another string inside a particular string, which one will do ...
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11
A Fast Multi-pattern Regex Matcher for Modern CPUs - USENIX
https://www.usenix.org/sites/default/files/conference/protected-files/nsdi19_slides_wang_xiang.pdf
Networking Applications with Regex Matching ... Smaller FAs with fast DFA matching ... Graph-based Regex Decomposition. Glushkov NFA. 1 a. 2 b. 3 c.
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https://www.usenix.org/sites/default/files/conference/protected-files/nsdi19_slides_wang_xiang.pdf
Networking Applications with Regex Matching ... Smaller FAs with fast DFA matching ... Graph-based Regex Decomposition. Glushkov NFA. 1 a. 2 b. 3 c.
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12
R Interface to Google RE2 (C++) Regular Expression Library
https://cran.r-project.org/web/packages/re2/re2.pdf
Title R Interface to Google RE2 (C++) Regular Expression Library. Version 0.1.2 ... fast and safe alternative to backtracking regular-expression engines.
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https://cran.r-project.org/web/packages/re2/re2.pdf
Title R Interface to Google RE2 (C++) Regular Expression Library. Version 0.1.2 ... fast and safe alternative to backtracking regular-expression engines.
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13
One-more-re-nightmare – A fast regex compiler in Common Lisp
https://news.ycombinator.com/item?id=29397799
With the "use a program to generate C" approach, if there's some bug in the C code, the best the compiler or runtime can do is point you to the line of C ...
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https://news.ycombinator.com/item?id=29397799
With the "use a program to generate C" approach, if there's some bug in the C code, the best the compiler or runtime can do is point you to the line of C ...
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14
regex-redux (Benchmarks Game) - Debian
https://benchmarksgame-team.pages.debian.net/benchmarksgame/performance/regexredux.html
› regexr...
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https://benchmarksgame-team.pages.debian.net/benchmarksgame/performance/regexredux.html
› regexr...
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15
How to write regular expressions in C - Educative.io
https://www.educative.io/answers/how-to-write-regular-expressions-in-c
A regular expression is a sequence of characters used to match a pattern to a string. ... POSIX is a well-known library used for regular expressions in C.
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https://www.educative.io/answers/how-to-write-regular-expressions-in-c
A regular expression is a sequence of characters used to match a pattern to a string. ... POSIX is a well-known library used for regular expressions in C.
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16
What is the best regex library for C? - Quora
https://www.quora.com/What-is-the-best-regex-library-for-C
It gives you a quick introduction to regexes, and get you "up and running" fast. If you want to not just know, but master regexes (which would require a lot of ...
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https://www.quora.com/What-is-the-best-regex-library-for-C
It gives you a quick introduction to regexes, and get you "up and running" fast. If you want to not just know, but master regexes (which would require a lot of ...
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17
C++ regex Tutorial: Regular Expressions In C++ With Examples
https://www.softwaretestinghelp.com/regex-in-cpp/
Regular Expression (regex) In C++. A regular expression or regex is an expression containing a sequence of characters that define a particular ...
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https://www.softwaretestinghelp.com/regex-in-cpp/
Regular Expression (regex) In C++. A regular expression or regex is an expression containing a sequence of characters that define a particular ...
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18
A comparison of regex engines - Rust Leipzig
https://rust-leipzig.github.io/regex/2017/03/28/comparison-of-regex-engines/
A performance comparison of regular expression engines including ... Perl Compatible Regular Expressions (PCRE) is a regular expression C ...
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https://rust-leipzig.github.io/regex/2017/03/28/comparison-of-regex-engines/
A performance comparison of regular expression engines including ... Perl Compatible Regular Expressions (PCRE) is a regular expression C ...
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19
Why you should change your Regex Engine - Dev Genius
https://blog.devgenius.io/why-you-should-change-your-regex-engine-4c26a66ebf23
Probably you don't need need change your Regex Engine, ... a million times faster than Perl when running on a miniscule 29-character string.
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https://blog.devgenius.io/why-you-should-change-your-regex-engine-4c26a66ebf23
Probably you don't need need change your Regex Engine, ... a million times faster than Perl when running on a miniscule 29-character string.
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20
Regular expressions library (since C++11) - cppreference.com
https://en.cppreference.com/w/cpp/regex
These functions are used to apply the regular expression encapsulated in a regex to a target sequence of characters. regex_match. (C++11).
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https://en.cppreference.com/w/cpp/regex
These functions are used to apply the regular expression encapsulated in a regex to a target sequence of characters. regex_match. (C++11).
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21
C++ Weekly - Ep 74 - std::regex optimize - YouTube
https://www.youtube.com/watch?v=7hfSyxNxFfo
Cᐩᐩ Weekly With Jason Turner
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https://www.youtube.com/watch?v=7hfSyxNxFfo
Cᐩᐩ Weekly With Jason Turner
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22
A Regular Expression Matcher
https://www.cs.princeton.edu/courses/archive/spr09/cos333/beautiful.html
Ken's original matcher was very fast because it combined two independent ideas ... regular expressions became popular, and were included not only in C-based ...
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https://www.cs.princeton.edu/courses/archive/spr09/cos333/beautiful.html
Ken's original matcher was very fast because it combined two independent ideas ... regular expressions became popular, and were included not only in C-based ...
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23
Python Questions and Answers – Regular Expressions
https://www.sanfoundry.com/python-questions-answers-regular-expressions/
c) such a function does not exist ... sentence = 'horses are fast' regex = re.compile('(?P<animal>\w+) (?P<verb>\w+) (?P<adjective>\w+)') matched ...
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https://www.sanfoundry.com/python-questions-answers-regular-expressions/
c) such a function does not exist ... sentence = 'horses are fast' regex = re.compile('(?P<animal>\w+) (?P<verb>\w+) (?P<adjective>\w+)') matched ...
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24
Best Go Regex Library - Nightfall AI
https://nightfall.ai/best-go-regex-library
Hyperscan and re2 are 24x to 40x faster than the default Go regexp ... The regexp library is native to Go, hyperscan is written in C, ...
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https://nightfall.ai/best-go-regex-library
Hyperscan and re2 are 24x to 40x faster than the default Go regexp ... The regexp library is native to Go, hyperscan is written in C, ...
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25
std::regex C++11 Standard Library Regular Expressions
https://www.regular-expressions.info/stdregex.html
Regex support part of the standard C++ library defined in C++11 and ... which makes your regex more efficient if you only care about the overall regex match ...
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https://www.regular-expressions.info/stdregex.html
Regex support part of the standard C++ library defined in C++11 and ... which makes your regex more efficient if you only care about the overall regex match ...
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26
Improving the performance of regular expressions
https://docs.bmc.com/docs/discovery/113/improving-the-performance-of-regular-expressions-788111995.html
Despite the improvements, writing efficient regular expressions is still ... combination of the letters a, b, and c before it gives up.
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https://docs.bmc.com/docs/discovery/113/improving-the-performance-of-regular-expressions-788111995.html
Despite the improvements, writing efficient regular expressions is still ... combination of the letters a, b, and c before it gives up.
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27
Regex speed - Google Groups
https://groups.google.com/g/golang-nuts/c/8PKZf5mv2uI
On many regular expressions, Perl's regex engine is quite a bit faster. ... written two regular expression libraries: RE2 (in C) and the Go regexp package.
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https://groups.google.com/g/golang-nuts/c/8PKZf5mv2uI
On many regular expressions, Perl's regex engine is quite a bit faster. ... written two regular expression libraries: RE2 (in C) and the Go regexp package.
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28
Fast regular expressions - CodeProject
https://www.codeproject.com/Articles/798/Fast-regular-expressions
Compiles a regular expression into a fast automaton. ... a regular expression which matches any identifier of the programming language "C", ...
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https://www.codeproject.com/Articles/798/Fast-regular-expressions
Compiles a regular expression into a fast automaton. ... a regular expression which matches any identifier of the programming language "C", ...
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29
Introduction to Hyperscan - Intel
https://www.intel.com/content/www/us/en/developer/articles/technical/introduction-to-hyperscan.html
Moreover, a focus on efficient algorithms and the use of Intel® ... Hyperscan comes with a regular expression compiler written in C++.
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https://www.intel.com/content/www/us/en/developer/articles/technical/introduction-to-hyperscan.html
Moreover, a focus on efficient algorithms and the use of Intel® ... Hyperscan comes with a regular expression compiler written in C++.
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30
Implementing a Regular Expression Engine
https://deniskyashif.com/2019/02/17/implementing-a-regular-expression-engine/
In this article, we'll implement a simple and efficient regex engine. ... So for example, the regular expression abc would be converted to ...
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https://deniskyashif.com/2019/02/17/implementing-a-regular-expression-engine/
In this article, we'll implement a simple and efficient regex engine. ... So for example, the regular expression abc would be converted to ...
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31
re2 C/C++ Package - JFrog ConanCenter - Conan.io
https://conan.io/center/re2
Fast\, safe\, thread-friendly regular expression library. regex. BSD-3-Clause. License. 20220601. Version. 87,226. Downloads. Versions (16).
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https://conan.io/center/re2
Fast\, safe\, thread-friendly regular expression library. regex. BSD-3-Clause. License. 20220601. Version. 87,226. Downloads. Versions (16).
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32
Python vs C++ for Text Processing - ActiveState
https://www.activestate.com/blog/python-vs-c-text-processing/
Takeaways include: Don't assume that moving from Python to C++ is faster for regex-heavy text processing tasks.regex performance varies ...
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https://www.activestate.com/blog/python-vs-c-text-processing/
Takeaways include: Don't assume that moving from Python to C++ is faster for regex-heavy text processing tasks.regex performance varies ...
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33
SRELL ~ Regular Expression Template Library for C++
https://www.akenotsuki.com/misc/srell/en/
std regex-like Unicode regular expression template library for C++ (VC++, MinGW, etc.) ... Usually, this is somewhat faster than (...) . Assertions.
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https://www.akenotsuki.com/misc/srell/en/
std regex-like Unicode regular expression template library for C++ (VC++, MinGW, etc.) ... Usually, this is somewhat faster than (...) . Assertions.
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34
Loop Regex With Code Examples
https://www.folkstalk.com/tech/loop-regex-with-code-examples/
Regex is faster for large string than an if (perhaps in a for loops) to check if ... Example : The regular expression ab+c will give abc, abbc, abbc, ...
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https://www.folkstalk.com/tech/loop-regex-with-code-examples/
Regex is faster for large string than an if (perhaps in a for loops) to check if ... Example : The regular expression ab+c will give abc, abbc, abbc, ...
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35
Regex was taking 5 days to run. So I ... - DEV Community
https://dev.to/vi3k6i5/regex-was-taking-5-days-to-run-so-i-built-a-tool-that-did-it-in-15-minutes-c98
Any Regex library that does backtracking would be slower, time complexity wise. C/C++ might execute faster, but backtracking will be slow Algo.
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https://dev.to/vi3k6i5/regex-was-taking-5-days-to-run-so-i-built-a-tool-that-did-it-in-15-minutes-c98
Any Regex library that does backtracking would be slower, time complexity wise. C/C++ might execute faster, but backtracking will be slow Algo.
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36
std.regex - D Programming Language
https://dlang.org/phobos/std_regex.html
Create a static regex at compile-time, which contains fast native code: import std.regex ... \cC, Matches the control character corresponding to letter C.
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https://dlang.org/phobos/std_regex.html
Create a static regex at compile-time, which contains fast native code: import std.regex ... \cC, Matches the control character corresponding to letter C.
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37
Regular Expressions
https://cs.lmu.edu/~ray/notes/regex/
In formal language theory, a regular expression (a.k.a. regex, regexp, ... form that can be used for super fast validation, extraction, and replacing.
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https://cs.lmu.edu/~ray/notes/regex/
In formal language theory, a regular expression (a.k.a. regex, regexp, ... form that can be used for super fast validation, extraction, and replacing.
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38
Rob Pike's simple C regex matcher in Go - Ben Hoyt
https://benhoyt.com/writings/rob-pike-regex/
However, it's almost twice as fast. I'll leave it as an exercise for the reader why; my guess is that it's not recursive for this case, and recursive function ...
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https://benhoyt.com/writings/rob-pike-regex/
However, it's almost twice as fast. I'll leave it as an exercise for the reader why; my guess is that it's not recursive for this case, and recursive function ...
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39
How to clear console in C language? - GeeksforGeeks
https://www.geeksforgeeks.org/clear-console-c-language/
Using regex is a better way.The reason is its faster execution. By using regex we can perform clear screen operation very fastly in comparison ...
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https://www.geeksforgeeks.org/clear-console-c-language/
Using regex is a better way.The reason is its faster execution. By using regex we can perform clear screen operation very fastly in comparison ...
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40
C++ Regular Expression Performance - Software Ramblings
http://softwareramblings.com/2008/08/c-regular-expression-performance.html
Microsoft introduced C++0x regex support in Visual Studio 2008 feature ... For example, for pattern #1, the boost implementation was faster ...
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http://softwareramblings.com/2008/08/c-regular-expression-performance.html
Microsoft introduced C++0x regex support in Visual Studio 2008 feature ... For example, for pattern #1, the boost implementation was faster ...
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41
14 Strings | R for Data Science
https://r4ds.had.co.nz/strings.html
Regular expressions are useful because strings usually contain ... Multiple strings are often stored in a character vector, which you can create with c() :.
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https://r4ds.had.co.nz/strings.html
Regular expressions are useful because strings usually contain ... Multiple strings are often stored in a character vector, which you can create with c() :.
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42
A Better Pure Java RegEx Engine - Rosette Text Analytics
https://www.rosette.com/blog/a-better-pure-java-regex-engine/
At Basis Technology, we originally thought about regular expressions in C++. Years ago, we needed a reasonably capable, speedy, regular expression library ...
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https://www.rosette.com/blog/a-better-pure-java-regex-engine/
At Basis Technology, we originally thought about regular expressions in C++. Years ago, we needed a reasonably capable, speedy, regular expression library ...
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43
What's New In Python 3.11 — Python 3.11.0 documentation
https://docs.python.org/3/whatsnew/3.11.html
Python 3.11 is between 10-60% faster than Python 3.10. ... line 32, in query_user return 1 + query_count(db, response['a']['b']['c']['user'], retry=True) ...
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https://docs.python.org/3/whatsnew/3.11.html
Python 3.11 is between 10-60% faster than Python 3.10. ... line 32, in query_user return 1 + query_count(db, response['a']['b']['c']['user'], retry=True) ...
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44
Fast, Elegant Regexes in Haskell - begriffs.com
https://begriffs.com/posts/2016-06-27-fast-haskell-regexes.html
How can we provide an fast, elegant, typed Haskell regex API? ... Simple wrappers for a C library which takes raw strings; Those implemented ...
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https://begriffs.com/posts/2016-06-27-fast-haskell-regexes.html
How can we provide an fast, elegant, typed Haskell regex API? ... Simple wrappers for a C library which takes raw strings; Those implemented ...
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45
Chapter 8. Efficient file processing, regular expressions, and ...
http://book.realworldhaskell.org/read/efficient-file-processing-regular-expressions-and-file-name-matching.html
Code written with bytestring can often match or exceed the performance and memory footprint of C, while maintaining Haskell's expressivity and conciseness.
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http://book.realworldhaskell.org/read/efficient-file-processing-regular-expressions-and-file-name-matching.html
Code written with bytestring can often match or exceed the performance and memory footprint of C, while maintaining Haskell's expressivity and conciseness.
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46
about_search_regex: Regular Expressions in 'stringi' - Rdrr.io
https://rdrr.io/cran/stringi/man/about_search_regex.html
In stringi: Fast and Portable Character String Processing Facilities ... With so many regex functions in stringi, regular expressions may be a very powerful ...
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https://rdrr.io/cran/stringi/man/about_search_regex.html
In stringi: Fast and Portable Character String Processing Facilities ... With so many regex functions in stringi, regular expressions may be a very powerful ...
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47
ctre — ctre documentation
https://compile-time-regular-expressions.readthedocs.io/en/latest/
Fast compile-time regular expressions with support for matching/searching/capturing at compile-time or runtime. ctre::match<"REGEX">(subject); // C++20 ...
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https://compile-time-regular-expressions.readthedocs.io/en/latest/
Fast compile-time regular expressions with support for matching/searching/capturing at compile-time or runtime. ctre::match<"REGEX">(subject); // C++20 ...
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48
Let's Build a Regex Engine | kean.blog
https://kean.blog/post/lets-build-regex
Ever wondered how regex works under the hood? ... to NSRegularExpression which uses highly optimized ICU regex engine written in C.
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https://kean.blog/post/lets-build-regex
Ever wondered how regex works under the hood? ... to NSRegularExpression which uses highly optimized ICU regex engine written in C.
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49
Regex was taking 5 days to run. So I built a ... - freeCodeCamp
https://www.freecodecamp.org/news/regex-was-taking-5-days-flashtext-does-it-in-15-minutes-55f04411025f/
And this step, is <word> in c orpus? can be made fast using a dictionary lookup. FlashText algorithm is based on the second approach. It is ...
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https://www.freecodecamp.org/news/regex-was-taking-5-days-flashtext-does-it-in-15-minutes-55f04411025f/
And this step, is <word> in c orpus? can be made fast using a dictionary lookup. FlashText algorithm is based on the second approach. It is ...
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50
re2/re2.h - platform/external/regex-re2 - Git at Google
https://android.googlesource.com/platform/external/regex-re2/+/a85b0be/re2/re2.h
C++ interface to the re2 regular-expression library. ... On the other hand, failed matches run *very* fast (faster ... will leave 64 in a, b, c, and d.
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https://android.googlesource.com/platform/external/regex-re2/+/a85b0be/re2/re2.h
C++ interface to the re2 regular-expression library. ... On the other hand, failed matches run *very* fast (faster ... will leave 64 in a, b, c, and d.
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51
draft-gellens-imapext-regex-00 - IETF Datatracker
https://datatracker.ietf.org/doc/html/draft-gellens-imapext-regex-00
FAST": C: Z SEARCH REGEX SUBJECT "MAKE[ _\-\*]+MONEY[ _\-\*]+FAST" S: * SEARCH 2 22 98 2048 S: Z OK SEARCH Completed This example uses an invalid regular ...
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https://datatracker.ietf.org/doc/html/draft-gellens-imapext-regex-00
FAST": C: Z SEARCH REGEX SUBJECT "MAKE[ _\-\*]+MONEY[ _\-\*]+FAST" S: * SEARCH 2 22 98 2048 S: Z OK SEARCH Completed This example uses an invalid regular ...
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52
Five Invaluable Techniques to Improve Regex Performance
https://www.loggly.com/blog/five-invaluable-techniques-to-improve-regex-performance/
Liz Bennett explains what to do about slow regexes and goes over certain techniques that can make your regexes much faster.
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https://www.loggly.com/blog/five-invaluable-techniques-to-improve-regex-performance/
Liz Bennett explains what to do about slow regexes and goes over certain techniques that can make your regexes much faster.
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53
Perl Regular Expressions - Troubleshooters.Com
http://www.troubleshooters.com/codecorn/littperl/perlreg.htm
Regular Expressions in Perl. ... Without regular expressions, Perl would be a fast development environment. ... if($string =~ m/(B|b)ill (C|c)linton/)
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http://www.troubleshooters.com/codecorn/littperl/perlreg.htm
Regular Expressions in Perl. ... Without regular expressions, Perl would be a fast development environment. ... if($string =~ m/(B|b)ill (C|c)linton/)
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54
Replace regex implementation using C++11 (#17686) · Issues
https://gitlab.kitware.com/cmake/cmake/-/issues/17686
Hana's compile time regular expression implementation is almost 12 times faster! There are some caveats with that one though. It seems to be C++ ...
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https://gitlab.kitware.com/cmake/cmake/-/issues/17686
Hana's compile time regular expression implementation is almost 12 times faster! There are some caveats with that one though. It seems to be C++ ...
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55
Making string validation faster by not using a regular ...
https://blog.maartenballiauw.be/post/2017/04/24/making-string-validation-faster-no-regular-expressions.html
Trusting the work of Jimmy and trusting AutoMapper, we expected something else was probably causing this. And it was: a regular expression match ...
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https://blog.maartenballiauw.be/post/2017/04/24/making-string-validation-faster-no-regular-expressions.html
Trusting the work of Jimmy and trusting AutoMapper, we expected something else was probably causing this. And it was: a regular expression match ...
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56
Standard C Library regex performance issue - C / C++ - Bytes
https://bytes.com/topic/c/answers/603224-standard-c-library-regex-performance-issue
1. inludes regexp library (module re in Python, regex.h in c) ... So you're saying it runs very fast when you read a file line by line but
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https://bytes.com/topic/c/answers/603224-standard-c-library-regex-performance-issue
1. inludes regexp library (module re in Python, regex.h in c) ... So you're saying it runs very fast when you read a file line by line but
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57
Links - RegexPlanet
https://www.regexplanet.com/support/links.html
Rob Pike's simple C regex matcher in Go · GitHub - manoss96/pregex: PRegEx ... fast Finite State machine and REgular expression manipulation library.
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https://www.regexplanet.com/support/links.html
Rob Pike's simple C regex matcher in Go · GitHub - manoss96/pregex: PRegEx ... fast Finite State machine and REgular expression manipulation library.
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58
The Regular Expression Library - ModernesCpp.com
https://www.modernescpp.com/index.php/regular-expressions
R"(Raw String)" delimits the raw string. By the way, regular expressions and path names on windows "C:\temp\newFile.txt" are typical use-case ...
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https://www.modernescpp.com/index.php/regular-expressions
R"(Raw String)" delimits the raw string. By the way, regular expressions and path names on windows "C:\temp\newFile.txt" are typical use-case ...
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59
Python's replace faster than Julia's replace? - General Usage
https://discourse.julialang.org/t/pythons-replace-faster-than-julias-replace/63180
Hi, I am currently working on regex stuffs, and I noticed that Python's ... String is not the fastest among languages and Python's replace is in C and in ...
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https://discourse.julialang.org/t/pythons-replace-faster-than-julias-replace/63180
Hi, I am currently working on regex stuffs, and I noticed that Python's ... String is not the fastest among languages and Python's replace is in C and in ...
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60
10.3.1 POSIX Regular Expression Compilation - GNU.org
http://www.gnu.org/s/libc/manual/html_node/POSIX-Regexp-Compilation.html
POSIX Regexp Compilation (The GNU C Library) ... The compiled regular expression format is designed for efficient matching. regcomp stores it into ...
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http://www.gnu.org/s/libc/manual/html_node/POSIX-Regexp-Compilation.html
POSIX Regexp Compilation (The GNU C Library) ... The compiled regular expression format is designed for efficient matching. regcomp stores it into ...
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61
Regular Expressions for Embedded C++
https://embeddedartistry.com/blog/2019/06/14/regular-expressions-for-embedded-c/
Regular Expressions for Embedded C++; A Quick Note on Versioning ... the entire function here shows how efficient the code generation is.
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https://embeddedartistry.com/blog/2019/06/14/regular-expressions-for-embedded-c/
Regular Expressions for Embedded C++; A Quick Note on Versioning ... the entire function here shows how efficient the code generation is.
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62
RE/flex: C++ Regex Library and Fast Lexical Analyzer Generator
https://www.genivia.com/get-reflex.html
The regex-centric, fast lexical analyzer generator for C++. RE/flex is a more powerful free open source alternative to the Flex fast lexical analyzer ...
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https://www.genivia.com/get-reflex.html
The regex-centric, fast lexical analyzer generator for C++. RE/flex is a more powerful free open source alternative to the Flex fast lexical analyzer ...
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63
Regular expressions - HaskellWiki
https://wiki.haskell.org/Regular_expressions
regex-tre, Yes, POSIX, fast, No, No ? uses buggy libtre (v0.7.5) ... tagged DFA like the TRE c-library to provide efficient Posix matching.
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https://wiki.haskell.org/Regular_expressions
regex-tre, Yes, POSIX, fast, No, No ? uses buggy libtre (v0.7.5) ... tagged DFA like the TRE c-library to provide efficient Posix matching.
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64
A JIT for Regular Expression Matching - PyPy Status Blog
https://morepypy.blogspot.com/2010/06/jit-for-regular-expression-matching.html
In this post I want to describe how the JIT generator of the PyPy project can be used to turn the elegant but not particularly fast regular ...
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https://morepypy.blogspot.com/2010/06/jit-for-regular-expression-matching.html
In this post I want to describe how the JIT generator of the PyPy project can be used to turn the elegant but not particularly fast regular ...
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65
Efficiency of regular expressions
https://www.johndcook.com/blog/2011/01/20/efficiency-of-regular-expressions/
Another regular expression implementation does the same match six orders of magnitude faster. The example is contrived to show the ...
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https://www.johndcook.com/blog/2011/01/20/efficiency-of-regular-expressions/
Another regular expression implementation does the same match six orders of magnitude faster. The example is contrived to show the ...
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66
Regular Expression Optimizations - RexEgg
https://www.rexegg.com/regex-optimizations.html
Why should I use your programming language if you haven't taken the trouble to make it efficient? What's more, optimizing your regex can force you to write ...
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https://www.rexegg.com/regex-optimizations.html
Why should I use your programming language if you haven't taken the trouble to make it efficient? What's more, optimizing your regex can force you to write ...
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67
Python Regular Expression Tutorial with RE Library Examples
https://www.datacamp.com/tutorial/python-regular-expression-tutorial
Discover the power of regex in this tutorial. ... re.search(r'C\Wke', 'C@ke').group()) ## Uppercase W won't match single letter, digit print("Uppercase W ...
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https://www.datacamp.com/tutorial/python-regular-expression-tutorial
Discover the power of regex in this tutorial. ... re.search(r'C\Wke', 'C@ke').group()) ## Uppercase W won't match single letter, digit print("Uppercase W ...
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68
RegexOne - Learn Regular Expressions - Lesson 1: An ...
https://regexone.com/
RegexOne provides a set of interactive lessons and exercises to help you learn regular expressions.
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https://regexone.com/
RegexOne provides a set of interactive lessons and exercises to help you learn regular expressions.
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69
Replace matched patterns in a string. — str_replace • stringr
https://stringr.tidyverse.org/reference/str_replace.html
Control options with regex() . Match a fixed string (i.e. by comparing only bytes), using fixed() . This is fast, but approximate.
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https://stringr.tidyverse.org/reference/str_replace.html
Control options with regex() . Match a fixed string (i.e. by comparing only bytes), using fixed() . This is fast, but approximate.
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70
SPLITREGEX: FASTER REGEX SYNTHESIS FRAME
https://openreview.net/pdf?id=EJKLVMB_9T
complete and the main issue is to obtain a regex quickly within a time limit. ... For instance, if a string abbccdd is generated from a∗b∗c∗d∗, then.
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https://openreview.net/pdf?id=EJKLVMB_9T
complete and the main issue is to obtain a regex quickly within a time limit. ... For instance, if a string abbccdd is generated from a∗b∗c∗d∗, then.
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71
C# .Net: Fastest Way to check if a string occurs within a string
https://cc.davelozinski.com/c-sharp/fastest-way-to-check-if-a-string-occurs-within-a-string
T7. Regex.IsMatch(). C# · 1. 2. 3. for (int x = 0; x < ss.Length; x++). for (int y = 0; y < sf.Length; y++). c[y] += Regex.IsMatch(ss[x], Regex.
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https://cc.davelozinski.com/c-sharp/fastest-way-to-check-if-a-string-occurs-within-a-string
T7. Regex.IsMatch(). C# · 1. 2. 3. for (int x = 0; x < ss.Length; x++). for (int y = 0; y < sf.Length; y++). c[y] += Regex.IsMatch(ss[x], Regex.
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72
Python Regex | Regular Expression - Javatpoint
https://www.javatpoint.com/python-regex
Python Regex | Regular Expression with python tutorial, tkinter, button, ... regular expression solver because the execution is a simple short C loop that ...
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https://www.javatpoint.com/python-regex
Python Regex | Regular Expression with python tutorial, tkinter, button, ... regular expression solver because the execution is a simple short C loop that ...
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73
Mastering - документация - unix.org.ua
https://docstore.mik.ua/orelly/perl4/mre/mre.pdf
Regular expressions ar e the key to powerful, flexible, and efficient text ... As we've seen, the regular expression !cat" finds c ⋅a ⋅t anywher e on the.
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https://docstore.mik.ua/orelly/perl4/mre/mre.pdf
Regular expressions ar e the key to powerful, flexible, and efficient text ... As we've seen, the regular expression !cat" finds c ⋅a ⋅t anywher e on the.
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74
Techniques for Efficient Regular Expression Matching - CORE
https://core.ac.uk/download/pdf/62780846.pdf
In addition, both single characters and character sets can be repeated, using expressions such as c+, c*, [c1c2]+ and [c1c2]*. Wildcards are represented by a ...
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https://core.ac.uk/download/pdf/62780846.pdf
In addition, both single characters and character sets can be repeated, using expressions such as c+, c*, [c1c2]+ and [c1c2]*. Wildcards are represented by a ...
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75
Regular Expression in Java - Java Regex Example
https://www.digitalocean.com/community/tutorials/regular-expression-in-java-regex-example
The regular expression in java defines a pattern for a String. ... it negates the pattern, matches anything except a, b or c, (“[^ab][^12].
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https://www.digitalocean.com/community/tutorials/regular-expression-in-java-regex-example
The regular expression in java defines a pattern for a String. ... it negates the pattern, matches anything except a, b or c, (“[^ab][^12].
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76
performance: Regex patterns should not be created needlessly
https://rules.sonarsource.com/java/tag/performance/RSPEC-4248
Noncompliant Code Example. public void doingSomething(String stringToMatch) { Pattern regex = Pattern.compile("myRegex"); // Noncompliant Matcher matcher = ...
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https://rules.sonarsource.com/java/tag/performance/RSPEC-4248
Noncompliant Code Example. public void doingSomething(String stringToMatch) { Pattern regex = Pattern.compile("myRegex"); // Noncompliant Matcher matcher = ...
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77
Novice to Advanced RegEx in Nine Minutes or Less
https://towardsdatascience.com/novice-to-advanced-regex-in-nine-minutes-or-less-6af45a1df8c8
Regular expressions are the de facto standard for parsing text. If you code, you will use them, so it's important to understand them well.
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https://towardsdatascience.com/novice-to-advanced-regex-in-nine-minutes-or-less-6af45a1df8c8
Regular expressions are the de facto standard for parsing text. If you code, you will use them, so it's important to understand them well.
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78
Python Regex Superpower [Full Tutorial] - Finxter
https://blog.finxter.com/python-regex/
Python's re module comes with a number of regular expression methods that help you ... in the regex 'ca' that matches first regex 'c' and second regex 'a'.
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https://blog.finxter.com/python-regex/
Python's re module comes with a number of regular expression methods that help you ... in the regex 'ca' that matches first regex 'c' and second regex 'a'.
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79
How to use regular expressions in Swift
https://www.hackingwithswift.com/articles/108/how-to-use-regular-expressions-in-swift
It's an extremely fast and efficient way to search and replace complex ... The first regex c[a-z]*d means “c then zero or more lowercase ...
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https://www.hackingwithswift.com/articles/108/how-to-use-regular-expressions-in-swift
It's an extremely fast and efficient way to search and replace complex ... The first regex c[a-z]*d means “c then zero or more lowercase ...
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80
index - Pattern matching with LIKE, SIMILAR TO or regular ...
https://dba.stackexchange.com/questions/10694/pattern-matching-with-like-similar-to-or-regular-expressions-in-postgresql
Since Postgres 15 also a B-tree index using a "C" collation. See below. ... Why are regular expressions ( ~ ) always faster than SIMILAR TO ?
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https://dba.stackexchange.com/questions/10694/pattern-matching-with-like-similar-to-or-regular-expressions-in-postgresql
Since Postgres 15 also a B-tree index using a "C" collation. See below. ... Why are regular expressions ( ~ ) always faster than SIMILAR TO ?
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81
Regular Expressions for Perl, Ruby, PHP, Python, C, Java and ...
https://www.pdfdrive.com/regular-expression-pocket-reference-regular-expressions-for-perl-ruby-php-python-c-java-and-net-e162739851.html
Regular Expression Pocket Reference: Regular Expressions for Perl, Ruby, PHP, Python, C, Java and .NET ... Python: Learn Python Regular Expressions FAST!
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https://www.pdfdrive.com/regular-expression-pocket-reference-regular-expressions-for-perl-ruby-php-python-c-java-and-net-e162739851.html
Regular Expression Pocket Reference: Regular Expressions for Perl, Ruby, PHP, Python, C, Java and .NET ... Python: Learn Python Regular Expressions FAST!
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82
How to Validate HTML Forms Using Regular Expressions
https://www.makeuseof.com/regular-expressions-form-validation-html-javascript/
The above regular expression will match any string that includes the characters "a", "b", and "c" in that order, consecutively. The string "abc" ...
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https://www.makeuseof.com/regular-expressions-form-validation-html-javascript/
The above regular expression will match any string that includes the characters "a", "b", and "c" in that order, consecutively. The string "abc" ...
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83
The Regular Expression Denial of Service (ReDoS) cheat-sheet
https://levelup.gitconnected.com/the-regular-expression-denial-of-service-redos-cheat-sheet-a78d0ed7d865
You can sanitize the input. You can use a faster regex engine. You can use your regex engine's resource limit (only applicable in C#/.NET).
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https://levelup.gitconnected.com/the-regular-expression-denial-of-service-redos-cheat-sheet-a78d0ed7d865
You can sanitize the input. You can use a faster regex engine. You can use your regex engine's resource limit (only applicable in C#/.NET).
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84
Functions of Regular Expressions in C - eduCBA
https://www.educba.com/regular-expression-in-c/
Guide to Regular Expression in C. Here we also discuss working of regular expressions in c along with examples and its code implementation.
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https://www.educba.com/regular-expression-in-c/
Guide to Regular Expression in C. Here we also discuss working of regular expressions in c along with examples and its code implementation.
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85
Java vs. .NET RegEx performance - Coding Horror
https://blog.codinghorror.com/java-vs-net-regex-performance/
I don't get the same result. Java regex is twice faster for me. http://kingrazi.blogspot.com/2008/05/shootout-c-net-vs-java- ...
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https://blog.codinghorror.com/java-vs-net-regex-performance/
I don't get the same result. Java regex is twice faster for me. http://kingrazi.blogspot.com/2008/05/shootout-c-net-vs-java- ...
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86
NSRegularExpression | Apple Developer Documentation
https://developer.apple.com/documentation/foundation/nsregularexpression
All these examples use the regular expression \\b(a|b)(c|d)\\b as their regular expression. ... Somewhat more efficient than capturing parentheses.
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https://developer.apple.com/documentation/foundation/nsregularexpression
All these examples use the regular expression \\b(a|b)(c|d)\\b as their regular expression. ... Somewhat more efficient than capturing parentheses.
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87
Regex Engines - Devopedia
https://devopedia.org/regex-engines
Russ Cox provides a 400-line C implementation of Thompson's NFA . He shows that for pathological regex, this is a lot faster than common ...
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https://devopedia.org/regex-engines
Russ Cox provides a 400-line C implementation of Thompson's NFA . He shows that for pathological regex, this is a lot faster than common ...
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88
Regular expression in c++11/14 - IBM Community
https://community.ibm.com/community/user/ibmz-and-linuxone/blogs/fang-lu2/2020/03/24/regular-expression-in-c1114
In C++11, when constructing an regex object, we can switch syntax mode with a flag in the constructor. Regular expression library in c++. Below ...
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https://community.ibm.com/community/user/ibmz-and-linuxone/blogs/fang-lu2/2020/03/24/regular-expression-in-c1114
In C++11, when constructing an regex object, we can switch syntax mode with a flag in the constructor. Regular expression library in c++. Below ...
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89
Google's RE2 regular expression library - LWN.net
https://lwn.net/Articles/378384/
On a more practical note, these are multithreaded C++ programs with fixed-size stacks: the unbounded stack usage in typical regular expression ...
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https://lwn.net/Articles/378384/
On a more practical note, these are multithreaded C++ programs with fixed-size stacks: the unbounded stack usage in typical regular expression ...
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90
4. Pattern Matching with Regular Expressions - Java ... - O'Reilly
https://www.oreilly.com/library/view/java-cookbook-3rd/9781449338794/ch04.html
Again, the regex-based approach was orders of magnitude faster than doing it ... C:\\>. I interrupted it here to save paper. This can be written two ways: a ...
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https://www.oreilly.com/library/view/java-cookbook-3rd/9781449338794/ch04.html
Again, the regex-based approach was orders of magnitude faster than doing it ... C:\\>. I interrupted it here to save paper. This can be written two ways: a ...
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91
Is GitHub Copilot a blessing, or a curse? - Fast.ai
https://www.fast.ai/posts/2021-07-19-copilot.html
Parsing Python with a regular expression. I asked the fast.ai community for examples of times where Copilot had been helpful in writing code for ...
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https://www.fast.ai/posts/2021-07-19-copilot.html
Parsing Python with a regular expression. I asked the fast.ai community for examples of times where Copilot had been helpful in writing code for ...
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92
REGULAR EXPRESSIONS 1. Which module in Python ...
https://www.coursehero.com/tutors-problems/Python-Programming/28067124-REGULAR-EXPRESSIONS-1-Which-module-in-Python-supports-regular-express/
c) 'humans'. d) 'we are humans'. 8. What is the output of the following? sentence = 'horses are fast'. regex = re.compile('(?P<animal>w+) (?P<verb>w+) ...
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https://www.coursehero.com/tutors-problems/Python-Programming/28067124-REGULAR-EXPRESSIONS-1-Which-module-in-Python-supports-regular-express/
c) 'humans'. d) 'we are humans'. 8. What is the output of the following? sentence = 'horses are fast'. regex = re.compile('(?P<animal>w+) (?P<verb>w+) ...
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93
ripgrep is faster than {grep, ag, git grep, ucg, pt, sift}
https://blog.burntsushi.net/ripgrep/
cat wat c aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa c $ ucg '(a*)*c' wat ... Picking a fast regex engine is important, because every search tool will ...
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https://blog.burntsushi.net/ripgrep/
cat wat c aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa c $ ucg '(a*)*c' wat ... Picking a fast regex engine is important, because every search tool will ...
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94
(PDF) Efficient FPGA based regular expression pattern matching
https://www.researchgate.net/publication/228810333_Efficient_FPGA_based_regular_expression_pattern_matching
PDF | An approach to the automatic generation of efficient Field Programmable Gate Arrays ... For example, a regular expression r is [c.
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https://www.researchgate.net/publication/228810333_Efficient_FPGA_based_regular_expression_pattern_matching
PDF | An approach to the automatic generation of efficient Field Programmable Gate Arrays ... For example, a regular expression r is [c.
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95
Learn Regular Expressions in 20 Minutes - Tutorialzine
https://tutorialzine.com/2014/12/learn-regular-expressions-in-20-minutes
It matches only one of those characters - in this example only a, b or c. You can negate a set with ^ . [^abc] will match any character that is ...
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https://tutorialzine.com/2014/12/learn-regular-expressions-in-20-minutes
It matches only one of those characters - in this example only a, b or c. You can negate a set with ^ . [^abc] will match any character that is ...
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