My Solution to TOP Fundamentals Part 3 Problems

These are my answers that I came up with for The Odin's Project exercises using arrow functions.

• 1. Write a function called add7 that takes one number and returns that number + 7.

const add7 = (num) => num + 7;

• 2. Write a function called multiply that takes 2 numbers and returns their product.

const multiply = (x, y) => x * y;

• 3. Write a function called capitalize that takes a string and returns that string with only the first letter capitalized. Make sure that it can take strings that are lowercase, UPPERCASE or BoTh.

const capitalize = (str) => {
let firstLetter = str.slice(0,1);
let restOfStr = str.slice(1,);
return `${firstLetter.toUpperCase()}${restOfStr}`;
}

• 4. Write a function called lastLetter that takes a string and returns the very last letter of that string.

const lastLetter = (str, n) => {
let theLastLetter = str.slice(-1,);
return theLastLetter;
}

Comments

[Frank Wisniewski]

ES6 arrow functions give you an alternative way to write shorter syntax compared to function expression.

Because of this:

const capitalize = str => str[0].toLocaleUpperCase() + str.slice(1)
const lastLetter = str => str.slice(-1)

[Chantae P.]

Agree. This is a good solution as well.