labuladong.online Changelog

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2024/11/24

Resolved the slow loading bug in the comments section.
Fixed a bug in Red-Black Tree where node conditions were incorrect in certain cases.
Corrected display errors in the Doubly Linked List.

2024/11/18

Significantly improved access speed for overseas readers, resolving issues where pages would freeze during loading.

2024/11/14

Streamlined the Backtracking Algorithm Core Framework, organizing the N-Queens problem and Sudoku problem into Backtracking Algorithm Practice: Sudoku and N-Queens.
Optimized the API for built-in data structures in the visualization panel. See Visualization Panel Documentation for details.

2024/11/10

Increased the number of results that can be displayed in the top-right search box.
Added API documentation for each data structure in the Visualization Panel Documentation.

2024/11/3

Added Perfect Balance and Visualization of Red-Black Trees.

2024/10/30

Major Upgrade

The visualization panel now supports a color system, allowing modification of any object's color through keyword annotations and the page palette.

See Color System of the Visualization Panel for more details.

2024/10/27

Fixed the bug where the visualization panel displayed 404 Resource Not Found.
Resolved the bug where some articles displayed Fail to fetch data.

If you still encounter the above issues, please try refreshing the page or clearing your browser cache to resolve them.

2024/10/21

Fixed a bug where the visualization panel could not display sorting algorithms.

2024/10/19

Added Core Principles of Union Find and Core Principles of Segment Trees.
Enhanced Basics of Trie Trees with a visualization panel for better understanding.

2024/10/13

Improved the content of Binary Heap by storing elements starting from index 0, and added support for the showArray method to display both the underlying array and the binary tree structure.
Updated the Heap Sort Algorithm.

2024/10/3

Major Enhancement

Introduced a new section for Series of Sorting Algorithms in the quick start guide, along with visualizations for sorting algorithms.

2024/10/1

Added visualization panels for all exercises in Backtracking Exercises I, Backtracking Exercises II, and Backtracking Exercises III.
Fixed an issue with the style of the check-in calendar.

2024/9/24

Fixed a bug where code blocks in the exercise section lacked a copy button.
Added visualization panels for all solution codes in BFS Exercises I and BFS Exercises II.
Fixed a bug where the previous and next page links in some sections would redirect to the homepage.

2024/9/22

Fixed a bug related to the migration of permissions for the 小鹅通 site subscribers.
Fixed an issue where WeChat payments failed in certain cases.
Optimized the problem of the website constantly prompting the language switch option.

2024/9/21

Fixed the issue of missing JavaScript code in some multi-language code tabs.
Verified C++ code in the basic knowledge section and corrected some errors.
Fixed the issue of missing links to LeetCode in the problem panel.
Fixed the issue where a few problems lacked multi-language solution code.
Introduced a new notification component and optimized several known issues.

2024/9/19

Thanks to everyone's feedback, fixed issues with code formatting errors and missing content in certain articles.
Added "prerequisite knowledge" to each article, and displayed the number of problems that the article can help solve under the title.

2024/9/18

Thanks to everyone's feedback, several bugs have been fixed:

Optimized the issue where GitHub login sometimes failed.
Improved network access speed for overseas readers.
Fixed the issue where some readers were unable to edit comments.

2024/9/14

Added Practice Problems on Mathematical Techniques and Practice Problems on Union-Find Techniques.

2024/9/8

Major Improvement

Added dozens of practice problems.
Added a Practice Problems Summary Page for readers to easily view all practice sections.

2024/9/1

Major Improvement

The search bar at the top right of the website now supports direct searches by problem number, problem name in both Chinese and English, and problem links.

2024/8/25

Added a reading progress marker to each article to help determine whether the article has been studied.
Introduced prerequisite knowledge points at the beginning of articles for smoother understanding and learning.

2024/8/18

Major Improvement

Calibrated multi-language code snippets in all articles on the site to ensure code accuracy.
The website search box now supports direct searches for LeetCode problem names and numbers.

2024/7/17

Major Bug Fix

Resolved the issue where nodes were not displayed when building binary/multi-ary trees in the visualization panel.

Major Improvement

Unified the primary language of the website to Java.

2024/7/1

Fixed the bug where the visualization panel in the exercises section could not load.

Major Improvement

Significantly improved the accuracy of multi-language solutions in exercises.

2024/6/15

Enhanced reading experience and updated code styles.
Updated basic knowledge of binary heaps and binary trees; see the "Quick Start" section in the main site directory for details.
Optimized the Order Page to display gifted membership orders and their validity for old users.

Bug Fixes

Fixed the bug where the like/dislike function in the website's comment section reset the count to zero.

Fixed the missing functionality buttons in the visualization panel.

2024/5/10

Standardized the website icon style and made several other minor optimizations.
Fixed the bug where successful login on mobile redirected to a 404 page.

2024/5/1

Added several basic knowledge sections and optimized some content.
Added chapters on basic knowledge.

2024/3/26

Fixed the bug where some links in member articles still pointed to the old courses.
Fixed the bug where comments could not be loaded even after logging in.
Fixed the bug where comments could not be made after logging in through GitHub.

2024/2/26

Enabled support for overseas readers to log in to the website using GitHub accounts.

2024/2/22

Supported reading history for articles. In the sidebar, completed articles will display a mark, and incomplete articles will show a mark, helping you track your learning progress.
Enabled readers to edit and delete their comments.
Fixed some links leading to 404 errors.

2024/2/21

Support for direct payment initiation within WeChat.

One-Click Login in WeChat

Logging into the website on a PC requires scanning a QR code with WeChat, but it's cumbersome to log in from a mobile device as you need to take a screenshot of the QR code and upload it to WeChat.

Now, mobile one-click login is supported. Simply open the website in your mobile WeChat, click the "Login" button, and authorize the site to read your user nickname to log in directly.

2024/2/17

Bug Fix

Fixed a bug causing 404 errors in site search due to optimization of the URL generation algorithm for website articles.

2024/2/15

Support for Overseas PayPal Payments

Many overseas readers reported difficulties using local WeChat and Alipay payment options. Now, PayPal is supported for overseas readers to purchase courses conveniently.

Domestic users should not use PayPal, as PayPal transactions between two Chinese accounts are not allowed and will result in an error stating "This transaction has been declined to comply with international regulations."

2024/2/10

Breaking Change

Optimized the URL generation algorithm for website articles to avoid URL changes due to directory structure modifications.

Previously bookmarked article links might become invalid; if you encounter a 404 error when navigating to certain pages, it might be due to old browser cache. Please clear your browser cache and try again.

Completely removed outdated links pointing to Xiaoetong from the new website and plugins.

2024/2/5

Major Bug Fix

The check-in calendar for Check-in Challenge was incorrectly displaying missing check-ins in overseas time zones. This issue has been fixed.

Course videos now support keyboard controls: use left/right arrow keys to fast forward/rewind, up/down arrow keys to adjust volume, and the spacebar to pause/play.
Various minor bug fixes and user experience improvements.

2024/2/1

Breaking Change

The new website labuladong.online is officially launched, significantly enhancing the user experience. All courses from Xiaoetong have been migrated to the new website. Previous paying users can transfer their course access to the new site. Migration guide available here. The method for unlocking course-specific solutions via plugins has been updated in the first chapter of the courses.

Major Update

An "Edit" button has been added to the algorithm visualization panel on the new website, allowing readers to modify and execute the code in the algorithm visualization panel. Example:

2024/1/20

Major Bug Fix

Fixed the bug where the user ID would change with every login.

2024/1/15

Major Bug Fix

Fixed the bug causing delays in course access after successful WeChat/Alipay payments.

Fixed the issue of incorrect display of course/member unlock status.
Fixed several editor bugs, such as login failures and code execution issues.

2023/12/31

Launched the visual online editor: https://labuladong.online/algo-visualize

2023/10/29

Improved the display and navigation of LeetCode problems on the website.
Fixed the bug where the visualization panel could not be displayed in full screen during courses.
Added some visualization panels to aid understanding.

2023/10/2

Added a detailed introduction to the 《labuladong's Algorithm Notes》 paperback book.
Optimized the user experience of the 30-Day Challenge based on student feedback.

2023/8/29

Fully optimized the visualization panel, fixed several bugs, and significantly reduced unnecessary steps.
Updated the Visualization Panel User Guide comprehensively, adding practical scenario-based teaching sections.

2023/8/24

Added a draggable divider in the middle of the visualization panel.
The visualization panel can now highlight the recursive path on the recursion tree.

2023/8/21

Fixed a bug where multi-language code and inline comments were not displayed when learning courses on the webpage.
Improved member user notifications based on feedback, added a "Report an Issue" button.

2023/8/19

Added video introductions for the problem-solving series plugin.
Enhanced the style of the algorithm visualization panel to make it more noticeable.

2023/8/10

Upgraded the algorithm visualization panel functionality, allowing code to be clicked and directed to the corresponding execution steps:

2023/7/27

Fixed the issue where language tabs could not be switched in member-unlocked content.
Moved the content directory of Problem-Solving Challenge to the website for easier reference.
Added a homepage link, accessible by clicking the logo in the top left corner.

2023/7/19

Fixed the bug where the theme of the comments section did not match the website theme.

2023/7/13

Added a User Manual for the algorithm visualization feature in Chapter 1.
Added two buttons in the top right corner of the visualization panel: one to copy the URL of the algorithm visualization panel and the other to refresh the panel (useful if the animation fails to load):

Improved the display style of "Related Articles" at the end of each article.

Added an update log for the website and various plugins to keep users informed about updates.

2023/7/1

Upgraded the visualization feature to support visualizing all recursive algorithms from a tree perspective:

2023/6/27

Fixed bugs in algorithm visualization and added visualization for 50 problems.
Enabled interaction between the Chrome plugin and the website, displaying the plugin connection status in the top right corner of the webpage.

2023/6/25

Added a reading history feature: read articles will show a icon, and unread articles will show a icon.

2023/6/20

Launched a new theme to fully optimize the user experience.