Скачать или смотреть regex pattern including all special characters

Get Free GPT4.1 from https://codegive.com/a082a33
Okay, let's dive into the world of Regular Expressions (Regex) with a comprehensive tutorial, covering special characters, syntax, and practical examples. This will be a long one, so buckle up!

*What are Regular Expressions?*

Regular expressions (Regex or RegExp) are sequences of characters that define a search pattern. They are a powerful tool for pattern matching and manipulation of text. You can use them to:

Search for specific strings within a larger body of text.
Validate the format of data (e.g., email addresses, phone numbers).
Replace text that matches a pattern.
Extract specific information from text.
Split strings based on a delimiter.

Regex engines exist in most programming languages (Python, JavaScript, Java, C#, Ruby, etc.) and in many text editors/IDE. The core concepts remain the same, although syntax can vary slightly between engines. This tutorial will primarily focus on the common standards found in languages like Python and JavaScript, highlighting differences where they occur.

*Basic Regex Syntax and Characters*

Let's start with the fundamental building blocks of Regex:

1. *Literal Characters:*

Most characters (letters, numbers, spaces) match themselves literally.
Example: `abc` will match the sequence "abc" in the target string.





2. *Metacharacters:*

These characters have special meanings in Regex and control how the pattern is interpreted.

`.` (Dot): Matches any single character except a newline character (`\n`).





`^` (Caret): Matches the beginning of the string (or the beginning of a line in multiline mode).





`$` (Dollar): Matches the end of the string (or the end of a line in multiline mode).





`*` (Asterisk): Matches the preceding character zero or more times.





`+` (Plus): Matches the preceding character one or more times.





...

#endianness #endianness #endianness