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  2. Comparison of regular expression engines - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_regular...

    Has two implementations, with PCRE being the more efficient in speed, functions POSIX C POSIX.1 web publication: Licensed by the respective implementation Supports POSIX BRE and ERE syntax Python: python.org: Python Software Foundation License: Python has two major implementations, the built in re and the regex library. Ruby: ruby-doc.org

  3. Regular expression - Wikipedia

    en.wikipedia.org/wiki/Regular_expression

    More generally, an equation E=F between regular-expression terms with variables holds if, and only if, its instantiation with different variables replaced by different symbol constants holds. [30] [31] Every regular expression can be written solely in terms of the Kleene star and set unions over finite words. This is a surprisingly difficult ...

  4. Help:Searching/Regex - Wikipedia

    en.wikipedia.org/wiki/Help:Searching/Regex

    Instead of doing a basic indexed search on keywords, you can perform a regex search, which bypasses the index.A regex search scans the text of each page on Wikipedia in real time, character by character, to find pages that match a specific sequence or pattern of characters.

  5. Pattern matching - Wikipedia

    en.wikipedia.org/wiki/Pattern_matching

    Tree patterns are used in some programming languages as a general tool to process data based on its structure, e.g. C#, [1] F#, [2] Haskell, [3] ML, Python, [4] Ruby, [5] Rust, [6] Scala, [7] Swift [8] and the symbolic mathematics language Mathematica have special syntax for expressing tree patterns and a language construct for conditional ...

  6. grep - Wikipedia

    en.wikipedia.org/wiki/Grep

    In the Perl programming language, grep is the name of the built-in function that finds elements in a list that satisfy a certain property. [16] This higher-order function is typically named filter or where in other languages. The pcregrep command is an implementation of grep that uses Perl regular expression syntax. [17]

  7. Trump promises 'hell to pay' if Gaza hostages not promptly ...

    www.aol.com/news/trump-promises-hell-pay-gaza...

    (Reuters) -U.S. President-elect Donald Trump said on Monday there would be "hell to pay" in the Middle East if hostages held in the Gaza Strip were not released prior to his Jan. 20 inauguration.

  8. Russia tells its citizens: avoid travel to the West - AOL

    www.aol.com/news/russia-tells-citizens-avoid...

    Some Russians are in jail in the United States and dozens of U.S. citizens are in jail in Russia, convicted of a range of crimes ranging from espionage to hooliganism - even after the biggest ...

  9. Walking This Much Could Add 11 Years To Your Life - AOL

    www.aol.com/lifestyle/walking-much-could-add-11...

    A recent study found that adding 111 minutes of daily walking could help you live 11 years longer. Here's experts want you to know about walking's benefits.