couchmeka / bright-shiny-objects

Bright Shiny Objects

In this assignment we'll be working with objects! Objects are a way to group data together in key-value pairs.

We'll write a series of functions that will be tested automatically using a tool called Jest.

How to run the tests

After writing a function, you will be able to run software tests to automatically determine if your code is correct.

To do this, you must first install the jest software dependency using npm. To do this, run the command npm install (this installs jest because it is listed as a dependency in package.json).

Now that jest is installed, you can run the tests anytime you want with npm run test. There should be 9 tests, one for each function.

Instructions

In the main.js file, write the following functions:

createUser

• Accepts two parameters, a user's first name and last name
• Returns a user objects

Example:

createUser('Mesuara', 'Kaleziq') => 
{
  firstName: 'Mesuara',
  lastName: 'Kaleziq'
}

setAge

• Accepts two parameters, a user object and an age
• Adds a new age field to the user
• Returns the user object

Example:

const user = { 
    firstName: 'Tim',
    lastName: 'Horton'
};

setAge(user, 50) => 
{
    firstName: 'Tim',
    lastName: 'Horton',
    age: 50
}

incrementAge

• Accepts a user object
• Increments the age field by one
• Returns the user object

Example:

const user = { 
    firstName: 'Angela',
    lastName: 'Merkel',
    age: 66
};

incrementAge(user) =>
{ 
    firstName: 'Angela',
    lastName: 'Merkel',
    age: 67
}

fixCar

• Accepts a car object
• Sets the needsMaintenance field to false
• Returns the car object

Example

const car = {
    make: 'Ford',
    model: 'Mustang',
    year: 1969,
    needsMaintenance: true
};

fixCar(car) =>
{
    make: 'Ford',
    model: 'Mustang',
    year: 1969,
    needsMaintenance: false
}

addGrades

• Accepts two parameters, a student object and an array of grades
• Adds each new grade to the student's grades array
• Returns the student object

Example

const student = {
    name: 'Anthony DeRosa',
    email: '[email protected]',
    grades: [80, 100, 95]
};

const newGrades = [88, 70, 90];

addGrades(student, newGrades) =>
{
    name: 'Anthony DeRosa',
    email: '[email protected]',
    grades: [80, 100, 95, 88, 70, 90]
}

getDataType

• Accepts two parameters, an object and a key in that object
• Returns the data type of the value at that key in the object

Examples

const car = {
    make: 'Ford',
    model: 'Mustang',
    year: 1969,
    needsMaitenance: false
};

getDataType(car, 'make') => 'string'

getDataType(car, 'model') => 'string'

getDataType(car, 'year') => 'number'

getDataType(car, 'needsMaitenance') => 'boolean'

addTodo

• Accepts two parameters, an array of to-do items and a new to-do item
• Adds the new-todo item to the array
• Returns the array of to-do items

Example

const todos = [
    { 
        title: 'Get gas', 
        isComplete: false },
    { 
        title: 'Buy bread', 
        isComplete: true  
    }
];

const newTodo = {
    title: 'Call mom', 
    isComplete: false
};

addTodo(todos, newTodo) =>
[
    { 
        title: 'Get gas', 
        isComplete: false 
    },
    { 
        title: 'Buy bread', 
        isComplete: true  
    },
    {
        title: 'Call mom', 
        isComplete: false
    }
];

addSong

• Accepts two parameters, a playlist object and a song object
• Updates the duration of the playlist
• Adds the song to the playlist's songs
• Returns the playlist object

Example

const playlist = {
    title: 'My jams',
    duration: 7,
    songs: [
        {
            title: 'Texas Sun',
            artist: 'Khruangbin',
            duration: 4
        },
        {
            title: 'Malamente',
            artist: 'Rosalia',
            duration: 3
        }
    ]
};

const newSong = {
    title: 'Old Friends',
    artist: 'Pinegrove',
    duration: 3
};

addSong(playlist, song) =>
{
    title: 'My jams',
    duration: 10,
    songs: [
        {
            title: 'Texas Sun',
            artist: 'Khruangbin',
            duration: 4
        },
        {
            title: 'Malamente',
            artist: 'Rosalia',
            duration: 3
        },
        {
            title: 'Old Friends',
            artist: 'Pinegrove',
            duration: 3
        }
    ]
}

updateReportCard

• Accepts two parameters, a report card and a new grade (a number between 0 and 100)
• Updates the report card's lowest grade, highest grade, and average grade
• Adds the new grade to the report card's grades

Examples

const reportCard = {
    lowestGrade: 70,
    highestGrade: 96,
    averageGrade: 82,
    grades: [70, 95, 80]
};

updateReportCard(reportCard, 62) =>
{
    lowestGrade: 62,
    highestGrade: 96,
    averageGrade: 77,
    grades: [70, 95, 80, 62]
}

updateReportCard(reportCard, 100) =>
{
    lowestGrade: 70,
    highestGrade: 100,
    averageGrade: 86.5,
    grades: [70, 95, 80, 100]
}