3. Interfaces | Types | typeof | in operator | optional nullish - Typescript
Jan 25 · 4 min read · Interface Basics An interface is a blueprint that defines the shape of an object. //Interfaces are a way to define the shape of an object interface User333{ id:string; name:string; email?: string; } const user333:User333 = { id:"1",...
Join discussionSwift Tip: A Cleaner Way to Handle Optional Defaults in Strings
Nov 21, 2025 · 3 min read · https://youtu.be/L0X1BK4D6mc Handling Optionals is a bread-and-butter task for Swift developers. We all know the standard way to unwrap a value or provide a fallback, but things get tricky when we are dealing with String interpolation and data type...
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Optional Chaining: A Real-World Safety Net for Developers
Jun 22, 2025 · 4 min read · In the world of programming, developers frequently encounter situations where they need to access properties nested deep within an object. However, a common pitfall arises when one of the intermediate properties in this chain is null or undefined, le...
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Lesson 33: Mastering JavaScript Optional Chaining (?.) with challenges!
Apr 24, 2025 · 5 min read · Optional Chaining (?.) is a JavaScript syntax feature that allows you to safely access nested object properties without having to manually check for nullish (null or undefined) values at each level. ✅ Basic Example let user = {}; console.log(user?.ad...
Join discussionOptionals in Java
Jan 5, 2025 · 4 min read · Introduction Optional is a class introduced in Java 8 to handle null values in order to avoid the dreadful NullPointerException (NPE). It is a wrapper class that can be used to represent a value that may be null or not. Before Java 8, developers had...
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[React.js] Uncaught TypeError: Cannot read properties of undefined (reading 'map')
Nov 17, 2024 · 1 min read · About Error When I execute this react code, <div id={id} className="row__posters"> {movies.length > 0 ? ( movies.map((movie) => { return ( <SwiperSlide> <img key={movie.id} style={{ padding: "25px...
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Cara Menggunakan Optional Chaining di Javascript
Jul 17, 2024 · 2 min read · Konsep Optional Chaining (?.) yang baru saja diperkenalkan di Javascript ES2020. Versi baru dari Javascript membawa peningkatan pada implementasi saat ini dan membuat hidup kita lebih mudah sebagai developer. Kalian bisa cek Spesifikasi Bahasa ECMAC...
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Enhancing Golang with Scala-Style Option Handling for Safer Code
Jul 4, 2024 · 2 min read · As a developer and a fan of Scala and functional languages I really like to have an ability to be able to handle optional or nullable objects safely and be able to chain them to something new. Standard way to handle them in Golang is to handle them i...
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Nullish Coalescing, Optional Chaining, and BigInts
Jun 30, 2024 · 6 min read · JavaScript's evolution continues to bring us powerful features that make our code more robust and readable. Let's dive into some of the most impactful additions from ES11 (ECMAScript 2020) and ES12 (ECMAScript 2021) that are transforming how we write...
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