Quick JavaScript Array Functions Practice

Want to learn how to use JavaScript array functions like map, reduce, filter, etc? Use this worksheet and the corresponding videos to figure out how!

Sample Data

Here's a sample piece of Star Wars data from the Star Wars API.

const characters = [
    {
        name: 'Luke Skywalker',
        height: '172',
        mass: '77',
        eye_color: 'blue',
        gender: 'male',
    },
    {
        name: 'Darth Vader',
        height: '202',
        mass: '136',
        eye_color: 'yellow',
        gender: 'male',
    },
    {
        name: 'Leia Organa',
        height: '150',
        mass: '49',
        eye_color: 'brown',
        gender: 'female',
    },
    {
        name: 'Anakin Skywalker',
        height: '188',
        mass: '84',
        eye_color: 'blue',
        gender: 'male',
    },
];

MAP

Get an array of all names
Get an array of all heights
Get an array of objects with just name and height properties
Get an array of all first names

REDUCE

Get the total mass of all characters
Get the total height of all characters
Get the total number of characters in all the character names
Get the total number of characters by eye color (hint. a map of eye color to count)

FILTER

Get characters with mass greater than 100
Get characters with height less than 200
Get all male characters
Get all female characters

SORT

Sort by name
Sort by mass
Sort by height
Sort by gender

EVERY

Does every character have blue eyes?
Does every character have mass more than 40?
Is every character shorter than 200?
Is every character male?

SOME

Is there at least one male character?
Is there at least one character with blue eyes?
Is there at least one character taller than 200?
Is there at least one character that has mass less than 50?