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Tutorials for verifying domain names using regular expressions

Tutorials for verifying domain names using regular expressions

Tutorial on using regular expressions to verify domain names: Master regular expressions, including the use of special characters and meta characters. Verify the domain name with this regular expression: ^(([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])\.)*([A-Za-z0-9]|[A-Za-z0-9][A-Za-z0-9]]*[A-Za-z0-9\-]*[A-Za-z0-9])$ Decomposition regular expression: Make sure to start with a domain name, match the domain name tag, allow any number of domain tags, match the top-level domain, and ensure to end with the domain name. 4

Apr 17, 2025 am 11:24 AM
ai
@Pattern Annotation for verifying whether a string complies with a specific regular expression

@Pattern Annotation for verifying whether a string complies with a specific regular expression

@Pattern annotation is used to verify that string fields comply with the specified regular expression pattern, ensuring that the data conforms to a specific format, thereby improving accuracy. It can only be used for fields of String type. By adding annotations on the field, specifying regular expression patterns. When the value of the field does not conform to the pattern, an exception will be thrown, improving efficiency and simplifying the verification logic.

Apr 17, 2025 am 11:12 AM
How to use regularity to remove spaces between tags and tags in html

How to use regularity to remove spaces between tags and tags in html

Use regular expressions to replace the string matching the spaces between two tags to remove the spaces in HTML. The steps include: Defining the regular expression to match the space between the HTML tag and the tag. Use regular expression replacement, replace the capture group (space between label and label) with the matching string.

Apr 17, 2025 am 11:06 AM
How to view the content of git commit

How to view the content of git commit

Go deep into the secret of Git Commit: Use git show <commit_hash> to view basic change information. Use git log --patch to display modifications in "patch" form. git diff <commit_hash1>..<commit_hash2> Compare the differences between two commits. git log -G"regular expression"filter the submission by regular expression. git log --pretty=format:&a

Apr 17, 2025 am 10:45 AM
git ai
The Main Purpose of Python: Flexibility and Ease of Use

The Main Purpose of Python: Flexibility and Ease of Use

Python's flexibility is reflected in multi-paradigm support and dynamic type systems, while ease of use comes from a simple syntax and rich standard library. 1. Flexibility: Supports object-oriented, functional and procedural programming, and dynamic type systems improve development efficiency. 2. Ease of use: The grammar is close to natural language, the standard library covers a wide range of functions, and simplifies the development process.

Apr 17, 2025 am 12:14 AM
Python 编程语言
How to compare two files with notepad

How to compare two files with notepad

Notepad can compare two files and highlight the differences: open two files; select Compare in the "Plugin" menu; the differences are displayed as: same line: keep unmodified; added line: green background; deleted line: red background; modified line: yellow background, added part green, deleted part red.

Apr 16, 2025 pm 07:51 PM
notepad
How to cancel the notepad newline character

How to cancel the notepad newline character

To cancel newlines in Notepad, you can take three methods: Use the Find and Replace feature to replace all newlines with spaces. Use regular expressions to completely remove all newline characters. Use a text editor, replace line breaks with spaces or delete them altogether.

Apr 16, 2025 pm 07:21 PM
sublime notepad
How to summarize notepad data

How to summarize notepad data

Notepad cannot directly summarize data, and requires other tools or methods, including: using spreadsheet programs (such as Excel, Google Sheets) to use code/scripts (such as Python, R) to use third-party tools (such as Notepad, TextCrawler)

Apr 16, 2025 pm 07:03 PM
python 可视化数据 notepad
How to select a column for notepad?

How to select a column for notepad?

How to select a whole column in Notepad: Select directly: Hold down the Shift key and click on the beginning of the first row and the end of the last row of the column with the mouse. Find and replace: Use a regular expression, enter the line header tag ^ and the expression that matches all characters in the column, and click Replace All. Macro: Record a macro that presses the Home and Shift End keys to select the entire column and plays it back.

Apr 16, 2025 pm 06:39 PM
notepad
How to use sublime shortcut keys

How to use sublime shortcut keys

Sublime Text provides shortcuts to improve development efficiency, including commonly used (save, copy, cut, etc.), editing (indentation, formatting, etc.), navigation (project panel, file browsing, etc.), and finding and replacing shortcuts. Proficiency in using these shortcut keys can significantly improve Sublime's efficiency.

Apr 16, 2025 am 08:57 AM
linux sublime
sublime column mode

sublime column mode

Sublime Text's column editing function can greatly improve code efficiency. 1. Select the same content through the shortcut key (Ctrl Shift L/Cmd Shift L) to modify it uniformly, such as batch replacement of variable names; 2. Use multiple column selection (Ctrl Shift M/Cmd Shift M) to modify it in the same position in different rows, such as adding parameters to multiple functions at the same time. After proficiency, column editing can significantly improve coding efficiency and reduce errors. It is suitable for various programming languages, but for complex code or conditional modifications, other tools may be required.

Apr 16, 2025 am 08:03 AM
python sublime 工具 重构代码
How to set up global search for vscode

How to set up global search for vscode

Set up a global search in Visual Studio Code: Open Settings and search for Global Search. Configuration settings including inclusion/exclusion folders, file exclusion mode, result limits, and maximum file size. Press Ctrl Shift F (Windows/Linux) or Cmd Shift F (macOS) for a global search.

Apr 16, 2025 am 07:12 AM
linux vscode macos
How to search code globally for vscode

How to search code globally for vscode

Use the following steps to search globally in VSCode: Open VSCode, press the shortcut key, and enter the search box. Enter the search content and select the search range (full workspace or specific directory). (Optional) Configure search options such as regular expressions, case distinction, etc. Click the Find button and the search results will be displayed in the Search tab, containing the file name, line number, and matching text.

Apr 16, 2025 am 07:09 AM
vscode macos
How to search for vscode

How to search for vscode

Search in VSCode: Use the shortcut key Ctrl F or menu edit > Find. Enter the search content. Configure optional search options: full word matching, case sensitivity, or regular expressions. Click the Find Next button or press Enter to start the search. Search results are displayed in the Editor panel and the Find Results view, supporting advanced search features (Find Files, Regular Expressions, Range Search, and Symbol Search).

Apr 16, 2025 am 06:30 AM
linux vscode macos

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