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regex ↔ Syntax to express search pattern to match Character. XLang support

aka Regex, Regular-Expression, Regular-Expressions

Regular Expressions present in virtually every Programming Language albeit Syntax variations

Regex tools

References​

  1. . ↔ regex Metacharacter to match any single character (excl \n & line terminator)

  2. + ↔ ≥1 RegExp Quantifier to match 1+

  3. {n,m} ↔ RegExp Quantifier to match between n-m times

  4. \ ↔ regex Escape Metacharacter to escape reserved regex characters

  5. (?:abc) ↔ regex Non-Capturing Groupto prevent grouping reference

  6. | ↔ RegExp Assertion OR operator for alternative characters/expressions

  7. ^[abc] ↔ RegExp Character Class to match at line start char

  8. .* ↔ RegExp Quantifier to match anything & everything

  9. \B ↔ inverted RegExp Assertion to match only at not boundary of word (beginning or end of word)

  10. RegExp Syntax ↔ JS-specific regex syntax

  11. \xxx ↔ regex Metacharacter for Octal number xxx

  12. \xdd ↔ regex Metacharacter for Hexadecimal number dd

  13. \uxxxx ↔ regex Metacharacter for unicode character specified by Hexadecimal number xxxx

  14. \0 ↔ regex Metacharacter for NUL character

  15. Globbing ↔ Algo to match Wildcard Character pattern ie Glob || regex