Why are regular expressions universal?

The common reasons are reflected in flexibility, cross-language support, powerful matching capabilities, scalability, etc. Detailed introduction: 1. Flexibility: Regular expressions provide rich syntax and rules and can express various complex text patterns. It supports character matching, repeat matching, position matching, group capture and other functions, and can flexibly meet different matching needs; 2. Cross-language support: Regular expressions are widely supported in various programming languages ​​and text editors. For example, JavaScript, Python, Java, PHP and other programming languages, etc.

Operating system for this tutorial: Windows 10 system, Dell G3 computer.

Regular expression is a general text pattern matching tool that can be used to find, match and replace text that matches a specific pattern in a string.

The versatility of regular expressions is reflected in the following aspects:

Flexibility: Regular expressions provide rich syntax and rules that can express various complex text patterns. It supports character matching, repeat matching, position matching, group capture and other functions, and can flexibly meet different matching needs.

Cross-language support: Regular expressions have extensive support in various programming languages ​​and text editors. Whether it is programming languages ​​such as JavaScript, Python, Java, PHP, or text editors such as Sublime Text and Visual Studio Code, they all provide regular expression-related functions.

Powerful matching capabilities: Regular expressions can match various complex text patterns, including but not limited to letters, numbers, special characters, blank characters, email addresses, URLs, mobile phone numbers, etc. Regular expressions enable text matching and extraction quickly and efficiently.

Extensibility: Regular expressions can be combined and nested to build more complex matching rules. It supports logical operators (such as OR, AND, NOT), quantifiers (such as the number of repetitions), character classes (such as range, exclusion), back references and other functions, and can be flexibly combined and expanded according to needs.

Although regular expressions are versatile, you also need to pay attention to the syntax and performance of regular expressions. Complex regular expressions may cause performance issues, and the syntax and rules of regular expressions may be slightly different in different programming languages ​​and tools, and need to be adapted and adjusted according to specific situations.

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