How To Use Map In JavaScript - Array.prototype.map

Map is a very helpful Array method. In this video I go over what map is and how to use it. I use multiple examples to show it's benefits and usage.

My Gear:

[adrianpabloalvarez]

Why do you use the underscore before the variable in the var function? thanx for the video

[bikramchettri]

Thanks for the tutorial. Hey can you do a video on lazyloading

[StVirginia]

Why, when you console out the index, the console for agesOnly and agesSince18 show as undefined and null now? Thank you