JavaScript foundations: Object shorthand & spread

Instructions

To complete this Practice problem, you will update the existing functions in src/solution.js to use new syntax you have learned. Use object shorthand and the spread operator whenever possible.

Note: The second function makes use of the .concat() method. While you will be replacing it, you can learn more about it at the link below.

/*

Modify each function below to continue working with the suggested syntax.

When a function’s parameters reference `product`, it is referring to an object. Each object has the following shape:

{

name: “Washed Black Denim Overalls”,

priceInCents: 12000,

availableSizes: [ 28, 30, 32, 36 ]

}

*/

// `salesTax` is a decimal number, like 0.065

function createSalesProduct(product, salesTax) {

return {

name: product.name,

availableSizes: product.availableSizes,

salesTax: 0.065,

priceInCents: product.priceInCents * (1 + salesTax),

};

}

function joinSizes(productA, productB) {

const result = …productA.availableSizes, …productB.availableSizes;

}

return result;

}

JavaScript foundations: Default parameters

Instructions

To complete this Practice problem, you will do the following:

• Update each function to use argument defaults. You will also need to destructure objects.

getPriceInDollars()

You will need to update the function so that it works in the following ways:

// Typical use
getPriceInDollars({
  name: "Slip Dress",
  priceInCents: 8800,
  availableSizes: [0, 2, 4, 6, 10, 12, 16],
}); //> $88.00

// Missing `priceInCents` key
getPriceInDollars({
  name: "Slip Dress",
  availableSizes: [0, 2, 4, 6, 10, 12, 16],
}); //> $0.00

// No arguments
getPriceInDollars(); //> $0.00

checkIfSizeIsAvailable()

You will need to update the function so that it works in the following ways:

// Typical use
checkIfSizeIsAvailable(
  {
    name: "Slip Dress",
    priceInCents: 8800,
    availableSizes: [0, 2, 4, 6, 10, 12, 16],
  },
  10
); //> true

// Missing `availableSizes` key
checkIfSizeIsAvailable(
  {
    name: "Slip Dress",
    priceInCents: 8800,
  },
  10
); //> false

// Missing entire product
checkIfSizeIsAvailable(undefined, 10); //> false

// No arguments
checkIfSizeIsAvailable(); //> false
 /*

The following functions have various syntax errors in them. Fix the bugs to get the tests to pass!

When any of the following function’s parameters reference `product`, they are referencing an object with the following shape:

{

name: “Slip Dress”,

priceInCents: 8800,

availableSizes: [ 0, 2, 4, 6, 10, 12, 16 ]

}

*/

function getPriceInDollars(product) {

return “$” + (product.priceInCents / 100).toFixed(2);

}

// `size` is a number between 0 and 16.

function checkIfSizeIsAvailable(product, size) {

let sizes = product.availableSizes;

for (let i = 0; i < sizes.length; i++) {

if (sizes[i] === size) {

return true;

}

}

return false;

}