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This repository was archived by the owner on Nov 23, 2023. It is now read-only.
coindevs
/
ES6
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chapter3.js
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chapter3.js
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var log = console.log;
// es5
var es5 = function(a, b) {
return a + b;
}
// es6
var es6 = (a, b) => {
return a + b;
}
console.log(es5(1,2));
console.log(es6(1,2));
var func1 = (a,b)=>a+b // 화살표 앞뒤로 띄우지 않아도 가능
var func2 = a => a + 3 // 인자가 하나면 괄호 생략 가능
var func3 = () => 10 // 인자가 없으면 괄호 필요!
// var func4 = () // 이건 문법 에러!!
// => 10;
var func5 = () => // 이건 에러 안남....!?
10;
var func6 = () => {} // undefind 반환
var func7 = () => ({}) // 빈 객체 반환
var func8 = (...rest) => {
rest[1]
console.log(rest[1]);
}
var func9 = (a, b = 123, c, d) => {
console.log(a,b,c,d);
}
var obj = {
name: 'JE',
age: 28,
school: 'Handong'
}
var {name} = obj;
let Sports = function() {
this.count = 20;
};
Sports.prototype = {
plus: function() {
this.count += 1;
},
get: function() {
setTimeout(function() {
console.log("hello!");
}, 0);
}
}
let newSports = new Sports();
newSports.get();
console.log("======================");
console.log("======================");
console.log("======================");
console.log("======================");
console.log("======================");
console.log("======================");
console.log("======================");
let Game = function() {
this.count = 20;
};
Game.prototype = {
plus: function() {
this.count += 1;
},
get: function() {
setTimeout(() => {
console.log(this === window);
console.log(this.plus());
}, 0);
}
}
let game = new Game();
game.get();
function sum() {
var res = arguments[0];
for (var i = 1; i < arguments.length; i++) {
res += arguments[i];
}
return res;
}
function bind_add(a) {
return function(b) {
return sum(a, b);
}
}
var obj = {
name: 'JE',
age: 28
};
var func100 = (function() {
var c = 10, a = 10;
var obj2 = obj;
return function(b) {
obj2;
return a + b;
}
})()
obj = null;
var func100 = function(b) { return a + b }
func100 = null;
var abc = 10;
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