AleksandrovHomeWork/homeWork5,6/index.js

let tasks = {
    a: (value) => {
        alert(value);
    },
    
    cube: (a) => {
        console.log(a ** 3);
    },
    
    avg2: (a,b) => {
        console.log((a + b) / 2);
    },
    
    
    sum3: (a,b,c = 0) => {
        console.log(a + b + c);
    },
    
    intRandom: (min, max = min) => {
        console.log(Math.floor(Math.random() * (max - min + 1) + min)); 
    },
    
    greetAll: (...args) => {
        alert(`Hello ${args}`);
    },
    
    sum: (...a) => {
        let sum = 0;
        for (let arg in a) {
                sum += a[arg];
        }
        console.log(sum);
    },
};

let sample = prompt("Введите название задания")
switch (sample){
    case "a": 
        tasks.a("Привет!");
    break

    case "cube": 
        tasks.cube(3);
    break

    case "avg2": 
        tasks.avg2(1,2); 
        tasks.avg2(10,5);

    break
    
    case "sum3":
        tasks.sum3(1,2,3);
        tasks.sum3(5,10,100500);
        tasks.sum3(5,10);
    break

    case "intRandom": 
        tasks.intRandom(2, 15);
        tasks.intRandom(-1,-1); 
        tasks.intRandom(0,1); 
        tasks.intRandom(10);
    break

    case "greetAll":
        tasks.greetAll("Superman");
        tasks.greetAll("Superman", "SpiderMan");
        tasks.greetAll("Superman", "SpiderMan", "Captain Obvious");
    break

    case "sum":
        tasks.sum(1);
        tasks.sum(2); 
        tasks.sum(10,20,40,100); 
    break
};

// arr map
let arr = ["1", {}, null, undefined, "500", 700];
let newArr = arr.map((e) => typeof e === 'string' ? Number(e) : e);
console.log(newArr);

// array reduce
let arr2 = ["0", 5, 3, "string", null];
console.log(arr2.filter((n) => typeof n === 'number').reduce((a,b) => a * b));


// object filter
let phone = {
    brand: "meizu",
    model: "m2",
    ram: 2,
    color: "black",
};

filter = (obj, callback) => {
    for (let key in obj){
        callback(key, obj[key]) || delete obj[key];
    }
    console.log(obj);
};

filter(phone,(key,value) => key == "color" || value == 2);


//object map
map = (object, callback) => {
    for (let key in object) {
        let obj = callback(key, object[key])
        delete object[key];
        for (key in obj) {
            object[key] = obj[key]
        }
    }
};

let object = {
    name: 'Иван',
    age: '17'
};

map({name: "Иван", age: 17},function(key,value){
    var result = {};
    result[key+"_"] = value + "$";
    console.log(result);
});