JavaScript Video Tutorial - Using the map() function to transform collections in UnderscoreJS

In this demonstration, we will use the map() function to transform a number of different collections.

[dmitriydorogonov]

Really nice lessons and I'm glad to see Sublime Text =)

[prettyprinted]

Nice video. I've never considered mapping over DOM elements before. I can see it being useful in my code.

[kayceecodes]

how does map know that the anonymous function parameters are the key, value and items. is this a syntax for using the map function? I thought thought map was used array.map( index, function() {}, optional parameter).