Iterations

// for

for(let i = 0; i <= 10; i++){
    const element = i;
    if(element == 5){
        console.log("5 is the best number");
    }
    console.log(element);
}

for(let i = 1; i <= 10; i++){
    console.log(`Outer loop is value: ${i}`);
    for(let j = 1; j <= 10; j++){
        // console.log(`Inner value ${j} and inner loop ${i}`);
        console.log(i + "*" + j + ' = ' + i*j);
    }
}

let myArray = ['flash', 'batman', 'superman'];
for(let index = 0; index < myArray.length; index++){
    const element = myArray[index];
    console.log(element);
}

for(let index = 1; index <= 20; index++){
    if(index == 5){
        console.log(`Detected 5`);
        break;
    }
    console.log(`Value of i is ${index}`);
}

for(let index = 1; index <= 20; index++){
    if(index == 5){
        console.log(`Detected 5`);
        continue;
    }
    console.log(`Value of i is ${index}`);
}

// while, do-while

let index = 0;
while(index <= 10){
    console.log(`Value of index is ${index}`);
    index = index + 2;
}

let myArray = ['flash', 'batman', 'superman'];

let arr = 0;
while(arr < myArray.length){
    console.log(`Value of array is ${myArray[arr]}`);
    arr = arr + 1;
}

let score = 11;
do {
    console.log(`Score is ${score}`);
    score++;
} while (score <= 10);

const arr = [1, 2, 3, 4, 5];

for(const num of arr){
    console.log(num);
}

const greetings = "Hello world!";
for(const greet of greetings){
    console.log(`Each char is ${greet}`);
}

const map = new Map();
map.set('name', 'John');
map.set('age', 30);
map.set('gender', 'male')

// console.log(map);

for(const [key, value] of map){
    console.log(`${key}: ${value}`);
}

const myObject = {
    game1: "NFS",
    game2: "Spiderman",
}

// for(const [key, value] of myObject){
//     console.log(key, ":", value);
// }

const myObject = {
    js: "javascript",
    cpp: "C++",
    rb: "ruby",
    swift: "swift by apple",
}

for(const key in myObject){
    console.log(`${key} shortcut is for ${myObject[key]}`)
}

const programming = ["js", "rb", "py", "java", "cpp"];

for(const key in programming){
    console.log(programming[key]);
}

const map = new Map();
map.set("IN", "India");
map.set("USA", "Unites states of America");
map.set("Fr", "France");
// map.set("In", "India");

for(const key in map){
    console.log(key);
}

const coding = ["Js", "ruby", "Java", "pyhton", "cpp"];

coding.forEach(function(val) {
    console.log(val);
});

coding.forEach((item) => {
    console.log(item);
});

function printMe(item){
    console.log(item);
}

coding.forEach(printMe);

coding.forEach((item, index, arr) => {
    console.log(item, index, arr);
});

const myCoding = [
    {
        languageName: "Javascript",
        languageFileName: "js"
    },
    {
        languageName: "Java",
        languageFileName: "java"
    },
    {
        languageName: "Python",
        languageFileName: "py"
    },
];

myCoding.forEach((item) => {
    console.log(item.languageFileName);
})

const myNums = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];

const newNums = myNums.filter((num) => {
    return num > 4;
});

console.log(newNums);


const newNums1 = [];

myNums.forEach((num) => {
    if(num > 4){
        newNums1.push(num);
    }
})

console.log(newNums1);

const books = [
    {
        title: "Book One", genre: "Fiction", publish: 1981, edition: 2004
    },
    {
        title: "Book Two", genre: "Non-Fiction", publish: 1992, edition: 2008
    },
    {
        title: "Book Three", genre: "History", publish: 1999, edition: 2007
    },
    {
        title: "Book Four", genre: "Non-Fiction", publish: 1989, edition: 2010
    },
    {
        title: "Book Five", genre: "Science", publish: 2009, edition: 2014
    },
    {
        title: "Book Six", genre: "Fiction", publish: 1987, edition: 2010
    },
    {
        title: "Book Seven", genre: "History", publish: 1986, edition: 1996
    },
    {
        title: "Book Eight", genre: "Science", publish: 2011, edition: 2016
    },
    {
        title: "Book Nine", genre: "Non-Fiction", publish: 1981, edition: 1989
    },
];

let userBooks = books.filter((bk) => bk.genre === "History");

userBooks = books.filter((bk) => {
    return bk.publish >= 1995 && bk.genre === "History"
})

console.log(userBooks);

const myNumbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
// const newNums = myNumbers.map((num) => {return num + 10});

const myNums = myNumbers.map((num) => num * 10)
.map((num) => num + 1)
.filter((num) => num >= 40);

console.log(myNums);