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Deep Cloning in JavaScript: Safe Ways to Copy Objects
structuredClone, libraries, and DIY recipes—plus the pitfalls with Dates, Maps, Sets, typed arrays, class instances, circular refs, and performance. Introduction…
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Dynamic Object Keys Explained in JavaScript
How to use computed property names, symbols, and expressions as object keys — safely and effectively in real-world code. Introduction Have you…
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Using Object.entries for Fun &Â Profit
Turn objects into arrays of key–value pairs and unlock powerful patterns for iteration, transformation, and real-world dev workflows. Introduction Ever…
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Object.fromEntries: Transform Arrays into Objects
How to turn key–value pairs into objects, invert maps, filter entries, and unlock elegant patterns in modern JavaScript. Introduction You’ve…
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Optional Chaining: Avoid Ugly &&Â Checks
A practical, senior-dev guide to ?., ?.(), and ?.[]—how to write safer JavaScript/TypeScript without the pyramid of &&, plus real-world patterns, React usage,…
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Nullish Coalescing: Fallbacks the Right Way
Stop breaking on 0, ”, or false—why ?? is better than || for safe, predictable defaults in JavaScript and TypeScript. Introduction…
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How to Freeze Objects for Safety in JavaScript
Why and how to use Object.freeze to prevent mutations, what its limits are, and when to prefer alternatives like Object.seal,…
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Property Getters and Setters in Practice
How to use get and set for clean APIs, validation, caching, and more—with real-world patterns in JavaScript and TypeScript. Introduction…
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Looping Objects Correctly: No Pitfalls
A complete guide to iterating over objects in JavaScript — covering for…in, Object.keys, Object.entries, Object.values, and Maps—without the common mistakes. Introduction Looping…
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Understanding hasOwnProperty (and Object.hasOwn) — No Pitfalls
How to check if an object really has a key — without prototype gotchas, null-prototype crashes, or security footguns. With modern Object.hasOwn,…