Modern JavaScript from the Beginning - Second Edition - For...in Loop

The video tutorial explains how to use the for-in loop in JavaScript to iterate over object properties and array indices. It demonstrates creating an object with color properties and using a for-in loop to log keys and values. The tutorial also covers using for-in loops with arrays, highlighting the difference in behavior compared to objects. Finally, it introduces the concept of high-order array methods, setting the stage for the next video.

Explain how to retrieve values from an array using a 'for in' loop.

What are high-order array methods in JavaScript, and why are they useful?