A technical journal about algorithms, backend architecture, and evidence-based software engineering. https://devbattery.com/ Thu, 28 May 2026 21:54:16 +0900 https://devbattery.com/til/log-95/ Thu, 28 May 2026 21:53:42 +0900 https://devbattery.com/til/log-95/<img src="https://devbattery.com/assets/images/teasers/til.png" width="220" /> TIL https://devbattery.com/assets/images/teasers/til.png https://devbattery.com/til/log-94/ Wed, 20 May 2026 22:19:25 +0900 https://devbattery.com/til/log-94/<img src="https://devbattery.com/assets/images/teasers/til.png" width="220" /> TIL https://devbattery.com/assets/images/teasers/til.png https://devbattery.com/neetcode/top-k-elements-in-list/ Wed, 20 May 2026 18:10:00 +0900 https://devbattery.com/neetcode/top-k-elements-in-list/<img src="https://devbattery.com/assets/images/teasers/leetcode.webp" width="220" /> Synced attempt history for Top K Elements In List. https://devbattery.com/assets/images/teasers/leetcode.webp https://devbattery.com/neetcode/sort-colors/ Wed, 20 May 2026 16:29:56 +0900 https://devbattery.com/neetcode/sort-colors/<img src="https://devbattery.com/assets/images/teasers/leetcode.webp" width="220" /> Synced attempt history for LeetCode 75: Sort Colors. https://devbattery.com/assets/images/teasers/leetcode.webp https://devbattery.com/neetcode/sort-an-array/ Wed, 13 May 2026 16:34:05 +0900 https://devbattery.com/neetcode/sort-an-array/<img src="https://devbattery.com/assets/images/teasers/leetcode.webp" width="220" /> Synced attempt history for LeetCode 912: Sort an Array. https://devbattery.com/assets/images/teasers/leetcode.webp https://devbattery.com/til/log-93/ Tue, 12 May 2026 22:06:17 +0900 https://devbattery.com/til/log-93/<img src="https://devbattery.com/assets/images/teasers/til.png" width="220" /> TIL https://devbattery.com/assets/images/teasers/til.png https://devbattery.com/neetcode/design-hashmap/ Tue, 12 May 2026 18:09:36 +0900 https://devbattery.com/neetcode/design-hashmap/<img src="https://devbattery.com/assets/images/teasers/leetcode.webp" width="220" /> Synced attempt history for LeetCode 706: Design HashMap. https://devbattery.com/assets/images/teasers/leetcode.webp https://devbattery.com/til/work-92/ Mon, 11 May 2026 21:41:44 +0900 https://devbattery.com/til/work-92/<img src="https://devbattery.com/assets/images/teasers/til.png" width="220" /> TIL https://devbattery.com/assets/images/teasers/til.png https://devbattery.com/neetcode/design-hashset/ Mon, 11 May 2026 17:30:55 +0900 https://devbattery.com/neetcode/design-hashset/<img src="https://devbattery.com/assets/images/teasers/leetcode.webp" width="220" /> Synced attempt history for LeetCode 705: Design HashSet. https://devbattery.com/assets/images/teasers/leetcode.webp https://devbattery.com/til/log-91/ Fri, 08 May 2026 21:58:09 +0900 https://devbattery.com/til/log-91/<img src="https://devbattery.com/assets/images/teasers/til.png" width="220" /> TIL https://devbattery.com/assets/images/teasers/til.png https://devbattery.com/til/log-90/ Wed, 06 May 2026 20:57:54 +0900 https://devbattery.com/til/log-90/<img src="https://devbattery.com/assets/images/teasers/til.png" width="220" /> TIL https://devbattery.com/assets/images/teasers/til.png https://devbattery.com/til/log-89/ Tue, 28 Apr 2026 21:19:08 +0900 https://devbattery.com/til/log-89/<img src="https://devbattery.com/assets/images/teasers/til.png" width="220" /> TIL https://devbattery.com/assets/images/teasers/til.png https://devbattery.com/til/log-88/ Mon, 27 Apr 2026 21:47:38 +0900 https://devbattery.com/til/log-88/<img src="https://devbattery.com/assets/images/teasers/til.png" width="220" /> TIL https://devbattery.com/assets/images/teasers/til.png https://devbattery.com/neetcode/majority-element/ Thu, 23 Apr 2026 09:59:46 +0900 https://devbattery.com/neetcode/majority-element/<img src="https://devbattery.com/assets/images/teasers/leetcode.webp" width="220" /> Synced attempt history for LeetCode 169: Majority Element. https://devbattery.com/assets/images/teasers/leetcode.webp https://devbattery.com/neetcode/remove-element/ Thu, 23 Apr 2026 09:47:43 +0900 https://devbattery.com/neetcode/remove-element/<img src="https://devbattery.com/assets/images/teasers/leetcode.webp" width="220" /> Synced attempt history for LeetCode 27: Remove Element. https://devbattery.com/assets/images/teasers/leetcode.webp