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this and bind/apply/call methods

this and bind/apply/call methods in object context in JavaScript

Object property descriptors in JavaScript (writable, enumerable, configurable)

Different ways to create objects in JavaScript

Object.create() vs class syntax in JavaScript

Mutable and Immutable Array Methods in JavaScript — What's the Difference?

Array Iteration Performance in JavaScript — Which Method is Fastest?

Custom methods for arrays (Array.prototype override)

Sparse Arrays in JavaScript (open arrays)

Details, examples, practice