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JavaScript Array Iteration Methods

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Combining filter() and map()

4:13 with Joel Kraft

You can combine filter() and map() to clean an array of unwanted values before transforming the leftover items. Let's work with some examples in this video.

Snippets from the Video

const userNames = ['Samir', 'Angela', 'Beatrice', 'Shaniqua', 'Marvin', 'Sean'];

    // Result: [{name: 'Samir'}, {name: 'Shaniqua'}, {name:'Sean'}];

const users = [
  {name: 'Samir', age: 27},
  {name: 'Angela', age: 33},
  {name: 'Beatrice', age: 42},
  {name: 'Shaniqua', age: 30},
  {name: 'Marvin', age: 23},
  {name: 'Sean', age: 47}
];

    // Result: ['Angela', 'Beatrice', 'Shaniqua', 'Sean'];

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    the remaining elements in some way. 0:00
    For example, here's the list of names in an array. 0:01
    Let's take only the ones starting with the letter S and create an array of objects. 0:04
    Each object should have one property, 0:10
    name, which points to the string value of the username's array. 0:13
    Here's what we want to construct. 0:18
    Since you've already seen these two methods together, pause the video and 0:20
    see if you can work out how to create this array. 0:24
    To solve this, I first created a new variable, users. 0:29

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