Homework/06/script.js

// ________________________________________________FUNCTIONS__________________________________________________________

// --------------------------------------------a--------------------------------------------------------------

function a(key) {
    alert(key);
}

// a("Hello Stranger");

// --------------------------------------------cube--------------------------------------------------------------

function cube(number) {
    return number = number * number * number;
}

// alert(cube(3));

// --------------------------------------------avg2--------------------------------------------------------------

// let digit1 = +prompt("Enter first digit");
// let digit2 = +prompt("Enter second digit");

function avg2(num1, num2) {
    let avg = (num1 + num2) / 2;
    return avg;
}

// alert(avg2+prompt("Enter first digit"), +prompt("Enter second digit")));

// --------------------------------------------sum3--------------------------------------------------------------

// let digit1 = +prompt("Enter first digit");
// let digit2 = +prompt("Enter second digit");
// let digit3 = +prompt("Enter third digit");

function sum3(num1, num2, num3) {
    let sum = num1 + num2 + num3;
    return sum;
}

// alert(sum3(digit1, digit2, digit3));

// let sum3 = (num1, num2, num3) => {
//     let sum;
//     return sum = num1 + num2 + num3;      // Just wanted to try Arrow Functions
// }

// alert(sum3(+prompt("Enter first digit"), +prompt("Enter second digit"), +prompt("Enter third digit")));

// --------------------------------------------intRandom--------------------------------------------------------------

// function intRandom(min, max) {
//     let num = Math.round(Math.random() * max);            // Need to fix 
//     if(num < 0) {
//         num -= min;
//     }
//     if(num < min) {
//         num = num + min;
//     }

//     return num;
// }

function intRandom(min, max=0) {

    let num;

    if(max === 0) {
        num = max + Math.random() * (min - max);
    } else {
        num = min + Math.random() * (max - min);
    }

    return Math.round(num);
}

// alert(intRandom(+prompt("Enter Min value"), +prompt("Enter Max value")));
// console.log(intRandom());

// --------------------------------------------greetAll--------------------------------------------------------------

// function greetingsAll(name) {                         // It was my very first try
//     alert(`Hello ${name}`);
// }

// greetingsAll(prompt("Enter the name to say hi to this person"));

//_____________________________________________This one is done as in requirements___________________________________________________________________

function greetingsAll() {  
    let names = [];
    for(let param of arguments) {
        names.push(param);
    }
    alert(`Hello ${names}`);
}

// greetingsAll("Sam", "Dean", "Jonathan");

// --------------------------------------------sum--------------------------------------------------------------

function sum() {
    let total = 0;
    for(let key of arguments) {
        total += key;
    }
    return total;
}

// alert(sum(10, 25, 33, 46, 56));

// --------------------------------------------Union--------------------------------------------------------------

// let union = prompt("Введите название задания")
// switch (union.toLowerCase()){
//     case "a": a("Hello Stranger");
//               break
//     case "cube": alert(cube(3));
//               break
//     case "avg2": alert(avg2(+prompt("Enter first digit"), +prompt("Enter second digit")));
//               break
//     case "sum3": alert(sum3(+prompt("Enter first digit"), +prompt("Enter second digit"), +prompt("Enter third digit")));
//               break
//     case "intrandom": alert(intRandom(+prompt("Enter Min value"), +prompt("Enter Max value")));
//               break
//     case "greetAll": greetingsAll("Sam", "Dean", "Jonathan");
//               break
//     case "sum": alert(sum(10, 25, 33, 46, 56));
//               break
// }

// --------------------------------------------Union declarative--------------------------------------------------------------

let taskNames = {
    "a": () => a("Hello Stranger"),
    "cube": () => alert(cube(3)),
    "avg2": () => alert(avg2(+prompt("Enter first digit"), +prompt("Enter second digit"))),                                     
    "sum3": () => alert(sum3(+prompt("Enter first digit"), +prompt("Enter second digit"), +prompt("Enter third digit"))),
    "intrandom": () => alert(intRandom(+prompt("Enter Min value"), +prompt("Enter Max value"))),
    "greetAll": () => greetingsAll("Sam", "Dean", "Jonathan"),
    "sum": () => alert(sum(10, 25, 33, 46, 56))
}

let taskToStart = prompt("Введите название задания");

for(let key in taskNames) {
    if(key === taskToStart) {
        taskNames[key]();
    }
}