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Practice forEach in JavaScript

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Challenge 6 Solution

1:57 with James Churchill and Joel Kraft

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

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    For this challenge, 0:00
    we need to use the forEach method to iterate over the colors array and 0:01
    store the hex colors that start with the letter F in the array, filteredColors. 0:05
    As we've done with each of the other challenges I'll start with copying and 0:11
    pasting code into Atom in order to make it easier to read. 0:14
    So here's another challenge that requires us to evaluate each value in order to 0:23
    determine if it should be added to the filteredColors array. 0:27
    To start, I stubbed out my solution by adding a call to the forEach method. 0:32
    So colors.forEach. 0:37
    I used color for the current value parameter name, 0:41
    and a fat arrow and a set curly braces to define a code block. 0:43
    Then, I added an if statement. 0:49
    Check the second character in the hex color, starts with a letter F. 0:51
    So if, parenthesis, curly braces. 0:55
    To get the second character for the hex color, I use the CharAt string method. 1:00
    So color.charAt. 1:05
    The argument that you passed the charAt method 1:08
    is the index of the character that you want to retrieve. 1:10
    We want the second character, so I'll pass an index of one. 1:14
    And then we want the check to see if the character is equal to F. 1:20
    Specifically a capital F. 1:24
    Alternatively to get the character at an index of one, 1:27
    you could just index into the string, like this. 1:31
    Let's finish this up. 1:39
    If the if statement evaluates to true, 1:40
    we want to push the current color onto the filteredColors array. 1:42
    And that's the complete solution. 1:51
    Great job, just one more challenge to go. 1:53

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