Immutability on Dev & Platform Engineering Hubhttps://rhidayat.work/topics/immutability/Recent content in Immutability on Dev & Platform Engineering HubHugo -- gohugo.ioen© 2026 Rachmat HidayatSun, 09 Aug 2026 14:50:00 +0000TS Ep 57: Immutability & Readonly Datahttps://rhidayat.work/series/typescript/functional-effect/02-immutability-and-readonly-data/Sun, 09 Aug 2026 14:50:00 +0000https://rhidayat.work/series/typescript/functional-effect/02-immutability-and-readonly-data/Functional programming requires data to be immutable. Discover how to leverage TypeScript&rsquo;s structural typing, <code>Readonly&lt;T&gt;</code>, and <code>as const</code> to enforce deep immutability at compile time, eliminating a massive category of state-based bugs.TS Ep 15: Immutability with `as const` & Const Assertionshttps://rhidayat.work/series/typescript/fundamental/15-as-const-and-immutability/Sun, 09 Aug 2026 11:10:00 +0000https://rhidayat.work/series/typescript/fundamental/15-as-const-and-immutability/An exhaustive analysis of Const Assertions (<code>as const</code>). Learn the 3 transformation rules of const assertions, deep recursive read-only object properties, converting arrays into readonly tuples, and deriving union types dynamically using <code>typeof ARRAY[number]</code>.TS Ep 5: Arrays, Tuples, and Readonly Collectionshttps://rhidayat.work/series/typescript/fundamental/05-arrays-and-tuples/Sun, 09 Aug 2026 10:20:00 +0000https://rhidayat.work/series/typescript/fundamental/05-arrays-and-tuples/An exhaustive guide to typing collections in TypeScript. Learn the syntax differences between T[] and Array<!-- raw HTML omitted -->, union array typing precedence, labeled tuple elements, rest tuples, and why readonly arrays prevent array mutation bugs.