JavaScript Cheatsheet

let myArray = ["Mr. White", "Mr. Orange", "Mr. Blonde",
    "Mr. Pink", "Mr. Blue", "Mr. Brown"];

for (let name of myArray) {
    if (name === "Mr. Pink") {
        console.log("Encountered Mr. Pink. Breaking loop.");
        break;
    }
};

let newArray = [...myArray, "Nice Guy"];

let newArray2 = myArray.filter(name => name !== "Nice Guy");

newArray2.includes("Nice Guy");

let myList = [1, 2, 3];

myList = myList.filter(item => item !== 2);

for (let item of myList) {
    console.log(item);
}

myList.includes(3);

let index = 1;
let element = myList[index];

const myDictionary = {
    key1: 'value1',
    key2: 'value2',
};

delete myDictionary.key1;

for (const key in myDictionary) {
    const value = myDictionary[key];
    console.log(key, value);
}

const keyExists = 'key2' in myDictionary;

const value = myDictionary.key2;

const queue = [];

queue.push('element');

const removedElement = queue.shift();

const firstElement = queue[0];

const isEmpty = queue.length === 0;

const stack = [];

stack.push('element');

const removedElement = stack.pop();

const topElement = stack[stack.length - 1];

const isEmpty = stack.length === 0;