javascript-learner/6.4NFE/t.js

function sayHi(){
    console.log("Hi");

    sayHi.counter++;
}

console.log(sayHi.name)

let user = {
    sayHi(){

    },

    sayBye: function (){

    }
}

console.log(user.sayBye.name)
console.log(user.sayHi.name)

function ask(question, ...handlers){
    // let isYes = confirm(question);
    let isYes;
    let decision = Math.floor(Math.random() * 2);
    isYes = decision !== 0;
    console.log(`isYes? ${isYes}`);

    for(let handler of handlers){
        if (handler.length === 0){
            if (isYes) handler();
        }else{
            handler(isYes);
        }
    }
}

ask("Question?", () => console.log('You said yes'), result => console.log(result))

console.log("the difference between the counter.count and closure is the counter.count can be accessed outside but closure cannot");

sayHi = function func(who){
    console.log(`Hello, ${who}`);
};

sayHi("John");

function makeCounter(){
    function counter(){
        return counter.count++;
    }
    counter.set = function setCounter(value){
        counter.count = value;
    }

    counter.decrease = function decreaseCounter(){
        counter.count--;
    }
    counter.count = 0
    return counter;
}

let counter1 = makeCounter();
counter1()
console.log(counter1())
counter1.set(45)
console.log(counter1.count)
counter1.decrease()
console.log(counter1.count)

function sum(a){
    let currentSum = a;

    function f(b){
        currentSum += b;
        return f
    }

    f.toString = function(){
        return currentSum;
    }
    return f;
}

console.log(sum(1)(2));
console.log(sum(1)(-2));
alert(sum(1)(2));
alert(sum(1)(-2));