Regex is a text processing tool, and its common functions include text verification, text extraction, text replacement, text cutting, etc. In some places, the regular matching mentioned actually includes two functions of verification and extraction.
Verification is often used to verify whether the composition of the entire text conforms to the rules, such as password rule verification. Extraction is to extract the required content from a large section of text, such as extracting all the links on the web page. When using regularization to extract content, it is necessary to ensure that the wrong content (accuracy) cannot be extracted, and the correct content (completeness) cannot be missed. This requires us to be as thoughtful as possible when writing the regularization.
Support for regular expressions in some mainstream cross-platform editors/IDEs:
Some operations in the editor to improve the efficiency of text processing: cursor movement and selection, multi-focus editing, and vertical editing. After learning this, even if we don't use regular expressions, our efficiency in processing text in the editor will be greatly improved. Then, through some examples, we learned how to use regular expressions in the editor to extract text content, replace content, etc. The use of regularization is generally combined with other methods, and ultimately helps us complete text processing efficiently.
