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Practice forEach in JavaScript

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Challenge 1 Solution

1:46 with James Churchill and Joel Kraft

Let's walkthrough the solution to the first code challenge.

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    For the first challenge, we need to use the forEach method to add together 0:00
    all of the elements in the numbers array, and 0:04
    store the total in the variable named total. 0:07
    Before I show you how I solve this code challenge, I'm going to copy and 0:10
    paste the code for this challenge into GitHub's Atom text editor. 0:14
    Doing this will make the code easier to read. 0:20
    To solve this challenge, I started by adding the call to the forEach method. 0:24
    We wanna iterate over the numbers array, so I'll type numbers.forEach. 0:28
    Then I added the anonymous call back function using error function syntax. 0:36
    Since we're iterating over a list of numbers, 0:41
    I named the current value parameter, number, followed by a fat arrow. 0:44
    For the function body you could add a code block like I just did here. 0:50
    Or, you could just write the expression to add each number to the total variable. 0:56
    There are a couple of ways to add the number to the total variable. 1:01
    You could add the total variable to the number parameter and 1:04
    assign the result back to the total variable like this. 1:08
    Total equals total plus number. 1:11
    Or, you could use the addition assignment operator to make this code more concise. 1:16
    Total plus equals number. 1:24
    That's the approach that I ended up using and that completes this challenge. 1:29
    So how did you do? 1:34
    Don't worry if your solution didn't match mine exactly. 1:36
    There's definitely more than one way to correctly solve this challenge. 1:39
    See you after the next challenge. 1:43

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