Grokking JavaScript Fundamentals
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JavaScript - for-in loop
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The for-in loop is a special type of loop in JavaScript designed to iterate over all enumerable properties of an object, including inherited enumerable properties. It's particularly useful when you need to inspect or manipulate each property of an object without knowing the object's structure in advance. This loop simplifies the process of traversing an object's properties, making it an essential tool for dealing with objects in JavaScript.

Syntax

The basic syntax of a for-in loop is as follows:

  • key: On each iteration, this variable will hold the key (property name) o

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