![]() This approach can hurt the readability of your code when you're still new to these array functions. Take this example with a grain of salt though. Woah! Throwing in a reduce, we just removed our standalone variables for songsByAlbum and songs entirely □ forEach ( song =>, ) // then, map our songs right away!. Here's a simplified approach for what we want to do: // make a variable to keep track of the length, starting at 0 let albumLength = 0 // walk through the songs on the album.Īlbum. Now, we want to figure out how long the entire album is. Say we have our favorite album on a CD (remember those? □), and our stereo tells us the length of each track in minutes. Let's walk our way to reduce by using what we know: good ole' for loops. You can fork this CodePen for the source material to follow along □♂️ □ Step-by-step cheatsheet If you prefer to learn by video tutorial, this one's for you. Questions on reduce have come up so many times, and I think I've finally found an explanation that clicks □ Hope it works for you too! □ Video walkthrough I actually led a JS bootcamp with this topic for my college's Hack4Impact chapter ( material 100% free-to-use here!). ![]() ![]() Wait, how do I use the reduce function again? If you've run the guantlet of array methods in JavaScript, you've probably hit this roadblock a few times: ![]()
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