90 lines
1.6 KiB
JavaScript
90 lines
1.6 KiB
JavaScript
function sayHi(){
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console.log("Hi");
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sayHi.counter++;
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}
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console.log(sayHi.name)
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let user = {
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sayHi(){
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},
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sayBye: function (){
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}
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}
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console.log(user.sayBye.name)
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console.log(user.sayHi.name)
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function ask(question, ...handlers){
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// let isYes = confirm(question);
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let isYes;
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let decision = Math.floor(Math.random() * 2);
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isYes = decision !== 0;
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console.log(`isYes? ${isYes}`);
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for(let handler of handlers){
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if (handler.length === 0){
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if (isYes) handler();
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}else{
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handler(isYes);
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}
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}
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}
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ask("Question?", () => console.log('You said yes'), result => console.log(result))
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console.log("the difference between the counter.count and closure is the counter.count can be accessed outside but closure cannot");
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sayHi = function func(who){
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console.log(`Hello, ${who}`);
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};
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sayHi("John");
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function makeCounter(){
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function counter(){
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return counter.count++;
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}
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counter.set = function setCounter(value){
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counter.count = value;
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}
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counter.decrease = function decreaseCounter(){
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counter.count--;
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}
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counter.count = 0
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return counter;
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}
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let counter1 = makeCounter();
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counter1()
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console.log(counter1())
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counter1.set(45)
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console.log(counter1.count)
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counter1.decrease()
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console.log(counter1.count)
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function sum(a){
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let currentSum = a;
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function f(b){
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currentSum += b;
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return f
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}
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f.toString = function(){
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return currentSum;
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}
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return f;
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}
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console.log(sum(1)(2));
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console.log(sum(1)(-2));
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alert(sum(1)(2));
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alert(sum(1)(-2));
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