https://yosgi.github.io/en/tags/engineering/Recent content in Engineering on YosgiHugoenThu, 08 Oct 2026 01:31:25 +0000https://yosgi.github.io/en/post/ai-won-t-replace-software-engineers-it-will-replace-the-parts-of-coding-we-never-loved/Thu, 21 May 2026 23:28:56 +1200https://yosgi.github.io/en/post/ai-won-t-replace-software-engineers-it-will-replace-the-parts-of-coding-we-never-loved/AI will not replace software engineers as a whole. It will remove much of the repetitive, mechanical work and give engineers more leverage to focus on judgment, systems, users, and building better products.https://yosgi.github.io/en/post/high-frequency-synchronization-architecture-between-react-state-and-a-3d-engine/Sat, 31 Jan 2026 23:42:31 +1300https://yosgi.github.io/en/post/high-frequency-synchronization-architecture-between-react-state-and-a-3d-engine/A synchronization paradigm for massive real-time data: a middle layer isolates high-frequency data sources, and React consumes only the linear projection of the visible viewport.https://yosgi.github.io/en/post/138-copying-a-linked-list-with-random-pointers/Thu, 22 Jul 2021 00:00:00 +1200https://yosgi.github.io/en/post/138-copying-a-linked-list-with-random-pointers/Deep-copying a linked list with random pointers using a hash map from old nodes to new.https://yosgi.github.io/en/post/865-minimum-subtree-with-all-deepest-nodes/Sun, 21 Mar 2021 00:00:00 +1300https://yosgi.github.io/en/post/865-minimum-subtree-with-all-deepest-nodes/Finding the smallest subtree containing all deepest nodes with a single bottom-up recursion that returns each subtree's depth.https://yosgi.github.io/en/post/783-binary-search-tree-node-minimum-distance/Thu, 18 Mar 2021 00:00:00 +1300https://yosgi.github.io/en/post/783-binary-search-tree-node-minimum-distance/Finding the minimum distance between BST nodes using the ordered property of in-order traversal.https://yosgi.github.io/en/post/1448-count-the-number-of-good-nodes-in-a-binary-tree/Wed, 17 Mar 2021 00:00:00 +1300https://yosgi.github.io/en/post/1448-count-the-number-of-good-nodes-in-a-binary-tree/Notes on counting good nodes in a binary tree using DFS with a running max.https://yosgi.github.io/en/post/1325-delete-the-leaf-node-of-the-given-value/Wed, 17 Mar 2021 00:00:00 +1300https://yosgi.github.io/en/post/1325-delete-the-leaf-node-of-the-given-value/Post-order traversal approach to delete target-valued leaf nodes using a dummy root.https://yosgi.github.io/en/post/129-find-the-sum-of-numbers-from-the-root-node-to-the-leaf-node/Tue, 16 Mar 2021 00:00:00 +1300https://yosgi.github.io/en/post/129-find-the-sum-of-numbers-from-the-root-node-to-the-leaf-node/Summing all root-to-leaf numbers with top-down pre-order DFS, carrying the running value down each path.https://yosgi.github.io/en/post/863-all-nodes-with-distance-k-in-a-binary-tree/Sat, 13 Mar 2021 00:00:00 +1300https://yosgi.github.io/en/post/863-all-nodes-with-distance-k-in-a-binary-tree/Finding all nodes at distance K by first adding parent links with DFS, then searching outward from the target.https://yosgi.github.io/en/post/222-number-of-nodes-in-a-complete-binary-tree/Sat, 13 Mar 2021 00:00:00 +1300https://yosgi.github.io/en/post/222-number-of-nodes-in-a-complete-binary-tree/Counting nodes in a complete binary tree using left/right subtree depths instead of a full DFS.https://yosgi.github.io/en/post/450-delete-a-node-in-a-binary-search-tree/Thu, 11 Mar 2021 00:00:00 +1300https://yosgi.github.io/en/post/450-delete-a-node-in-a-binary-search-tree/Deleting a node from a binary search tree by locating it via the BST property, then handling the three deletion cases.https://yosgi.github.io/en/post/116-fill-in-the-next-right-node-pointer-of-each-node/Wed, 10 Mar 2021 00:00:00 +1300https://yosgi.github.io/en/post/116-fill-in-the-next-right-node-pointer-of-each-node/Connecting each node to its right neighbor per level, reusing the previous layer's links to reach constant space.https://yosgi.github.io/en/post/summary-of-binary-trees/Sun, 28 Feb 2021 00:00:00 +1300https://yosgi.github.io/en/post/summary-of-binary-trees/Notes on binary tree traversal — why DFS uses a stack and BFS a queue, with reusable pre/in/post-order and level-order templates.https://yosgi.github.io/en/post/understanding-react-hooks/Thu, 25 Feb 2021 00:00:00 +1300https://yosgi.github.io/en/post/understanding-react-hooks/Why React introduced Hooks — moving state out of class components and into function components, with worked examples.https://yosgi.github.io/en/post/review-of-login-and-registration-requirements/Sun, 21 Feb 2021 00:00:00 +1300https://yosgi.github.io/en/post/review-of-login-and-registration-requirements/A retrospective on a login/registration project that overran from one month to three — the requirements, the multi-channel auth, and the WeChat scan-code polling design.https://yosgi.github.io/en/post/vue-express-mongodb-build-a-backend-login-system/Fri, 29 Jan 2021 17:44:40 +1300https://yosgi.github.io/en/post/vue-express-mongodb-build-a-backend-login-system/Keywords nodejs vue express mongodbhttps://yosgi.github.io/en/post/dom-event-flow/Fri, 29 Jan 2021 17:44:40 +1300https://yosgi.github.io/en/post/dom-event-flow/DOM event flow is easy to confusehttps://yosgi.github.io/en/post/hexo-upgraded-to-5/Fri, 11 Dec 2020 12:37:55 +1300https://yosgi.github.io/en/post/hexo-upgraded-to-5/Filling Diaryhttps://yosgi.github.io/en/post/update-after-a-year/Fri, 11 Dec 2020 00:17:30 +1300https://yosgi.github.io/en/post/update-after-a-year/One month after leaving Dahuahttps://yosgi.github.io/en/post/css-pseudo-class-selector-nth-child/Thu, 07 Mar 2019 17:32:19 +1300https://yosgi.github.io/en/post/css-pseudo-class-selector-nth-child/About nth-child and HTML specificationshttps://yosgi.github.io/en/post/ajax-data-transmission-optimization/Wed, 28 Nov 2018 14:47:40 +1300https://yosgi.github.io/en/post/ajax-data-transmission-optimization/High Performance Javascript Knowledge Pointshttps://yosgi.github.io/en/post/ui-interface-response-optimization/Thu, 22 Nov 2018 16:55:21 +1300https://yosgi.github.io/en/post/ui-interface-response-optimization/High Performance Javascript Knowledge Pointshttps://yosgi.github.io/en/post/regular-expression-performance-optimization/Tue, 06 Nov 2018 15:48:14 +1300https://yosgi.github.io/en/post/regular-expression-performance-optimization/High Performance Javascript Knowledge Pointshttps://yosgi.github.io/en/post/algorithm-and-process-control-optimization/Thu, 25 Oct 2018 14:33:59 +1300https://yosgi.github.io/en/post/algorithm-and-process-control-optimization/High Performance Javascript Knowledge Pointshttps://yosgi.github.io/en/post/performance-optimization-of-dom-operations/Wed, 12 Sep 2018 15:09:33 +1200https://yosgi.github.io/en/post/performance-optimization-of-dom-operations/High Performance Javascript Knowledge Pointshttps://yosgi.github.io/en/post/summary-of-vue-s-easy-to-error-and-easy-to-confuse-knowledge-points/Mon, 10 Sep 2018 18:30:10 +1200https://yosgi.github.io/en/post/summary-of-vue-s-easy-to-error-and-easy-to-confuse-knowledge-points/Knowledge Points Summaryhttps://yosgi.github.io/en/post/javascript-loading-optimization/Tue, 04 Sep 2018 09:23:11 +1200https://yosgi.github.io/en/post/javascript-loading-optimization/Notes from 'High Performance JavaScript'https://yosgi.github.io/en/post/arrays-stacks-queues/Wed, 22 Aug 2018 15:09:45 +1200https://yosgi.github.io/en/post/arrays-stacks-queues/Javascript Data Structureshttps://yosgi.github.io/en/post/proxy-implementation-of-data-response/Fri, 27 Jul 2018 15:56:49 +1200https://yosgi.github.io/en/post/proxy-implementation-of-data-response/Rebuilding Vue-style reactive data binding with ES6 Proxy, and why it handles arrays and nested objects more cleanly than Object.defineProperty.https://yosgi.github.io/en/post/http-protocol-summary/Mon, 23 Jul 2018 23:29:19 +1200https://yosgi.github.io/en/post/http-protocol-summary/HTTP simple organizationhttps://yosgi.github.io/en/post/es5-inheritance/Tue, 17 Jul 2018 09:57:34 +1200https://yosgi.github.io/en/post/es5-inheritance/ES5 knowledge reviewhttps://yosgi.github.io/en/post/es5-creating-objects/Fri, 13 Jul 2018 16:51:52 +1200https://yosgi.github.io/en/post/es5-creating-objects/ES5 knowledge reviewhttps://yosgi.github.io/en/post/async/Wed, 11 Jul 2018 14:47:05 +1200https://yosgi.github.io/en/post/async/"ES6 Standard Introduction" Knowledge Points Summaryhttps://yosgi.github.io/en/post/generator-functions-and-applications/Fri, 06 Jul 2018 18:37:55 +1200https://yosgi.github.io/en/post/generator-functions-and-applications/"ES6 Standard Introduction" Knowledge Points Summaryhttps://yosgi.github.io/en/post/a-brief-introduction-to-web-security/Thu, 05 Jul 2018 10:05:36 +1200https://yosgi.github.io/en/post/a-brief-introduction-to-web-security/Web security related contenthttps://yosgi.github.io/en/post/promise/Wed, 27 Jun 2018 13:18:47 +1200https://yosgi.github.io/en/post/promise/"ES6 Standard Introduction" Knowledge Points Summaryhttps://yosgi.github.io/en/post/javascript-deep-copy-implementation/Tue, 26 Jun 2018 17:01:50 +1200https://yosgi.github.io/en/post/javascript-deep-copy-implementation/Javascript Basicshttps://yosgi.github.io/en/post/javascript-sorting-algorithm/Mon, 25 Jun 2018 18:48:42 +1200https://yosgi.github.io/en/post/javascript-sorting-algorithm/Javascript algorithm sorting algorithmhttps://yosgi.github.io/en/post/proxy/Fri, 18 May 2018 09:59:26 +1200https://yosgi.github.io/en/post/proxy/"ES6 Standard Introduction" Knowledge Points Summaryhttps://yosgi.github.io/en/post/observer-mode-and-vue-monitoring-object-changes/Sat, 05 May 2018 22:38:54 +1200https://yosgi.github.io/en/post/observer-mode-and-vue-monitoring-object-changes/Javascript Design Patterns Knowledge Pointshttps://yosgi.github.io/en/post/set-and-map-data-structures/Wed, 02 May 2018 00:00:00 +1200https://yosgi.github.io/en/post/set-and-map-data-structures/"ES6 Standard Introduction" Knowledge Points Summaryhttps://yosgi.github.io/en/post/object-expansion/Tue, 24 Apr 2018 00:00:00 +1200https://yosgi.github.io/en/post/object-expansion/"ES6 Standard Introduction" Knowledge Points Summaryhttps://yosgi.github.io/en/post/iterator-pattern/Fri, 20 Apr 2018 09:41:05 +1200https://yosgi.github.io/en/post/iterator-pattern/Javascript Design Patterns Knowledge Pointshttps://yosgi.github.io/en/post/proxy-mode/Thu, 19 Apr 2018 09:46:11 +1200https://yosgi.github.io/en/post/proxy-mode/Javascript Design Patterns Knowledge Pointshttps://yosgi.github.io/en/post/js-singleton-pattern/Fri, 13 Apr 2018 20:06:30 +1200https://yosgi.github.io/en/post/js-singleton-pattern/Javascript Design Patterns Knowledge Pointshttps://yosgi.github.io/en/post/function-extension/Thu, 12 Apr 2018 00:00:00 +1200https://yosgi.github.io/en/post/function-extension/"ES6 Standard Introduction" Knowledge Points Summaryhttps://yosgi.github.io/en/post/array-expansion/Wed, 11 Apr 2018 00:00:00 +1200https://yosgi.github.io/en/post/array-expansion/"ES6 Standard Introduction" Knowledge Points Summaryhttps://yosgi.github.io/en/post/destructuring-assignment-of-variables/Tue, 10 Apr 2018 11:07:34 +1200https://yosgi.github.io/en/post/destructuring-assignment-of-variables/"ES6 Standard Introduction" Knowledge Points Summary