Regular Expression Reference is a tool for finding and understanding regular expressions. It provides commonly used regular expression examples and explanations, making it easy for users to quickly find and understand the syntax and usage of regular expressions.

Features:

1. Enter a keyword in the search box, and the tool will automatically match related regular expression examples and explanations.

2. Users can click on the example card to view the specific syntax and usage of the regular expression.

3. Users can copy the regular expression for use in their code.

Use cases:

1. Development and testing: During the development or testing process, developers often need to use regular expressions to process and validate data. Using Regular Expression Reference, they can quickly find and understand the syntax and usage of regular expressions, improving development efficiency.

2. Data analysis: Data analysts need to use regular expressions to process and clean data. Using this tool, they can quickly find and understand the syntax and usage of regular expressions, allowing them to better handle data.

3. Code review: During code review, reviewers can use Regular Expression Reference to find and understand the syntax and usage of regular expressions, making it easier to understand the code logic.