노드 (2) ES6 문법 기능 추가

// a.      
console.log(score);
var score = 99;

// b.     
for(var i=0;i<10;i++){
	
}
console.log(i);

// c.     
var score = 98;
console.log(score);

// d.     
score = 97;
console.log(score);

// a.     
console.log(score);
let score = 99;

// b.     
for(let i=0;i<10;i++){
	
}
console.log(i); //   

// c.      
let score = 98; //   

// d.     
score = 97;
console.log(score);

// #      (        )
const PI;				//   
console.log(PI);	
	
// a.     
console.log(PI);    	//   
const PI= 3.1415926;
	
// b.     
{
	const SHAPE= 4;
}
console.log(SHAPE); 	//   

// c.      
const PI = 3.15;		//   

// d.      
PI= 4;					//   
console.log(PI);

	let obj = {
		name:"  "	,
		age:18		,
		sex:' '	,
		score:60	,
		grade:'  '
	}
	
	// ES5：    
	let name 	= obj.name	;
	let age		= obj.age	;
	let sex		= obj.sex	;
	console.log(name,age,sex);
	
	// ES6：    
	
	// 1.     
	let {name:name1,age:age1,sex:sex1} = obj;
	console.log(name1,age1,sex1);
	
	// 2.  
	let {name:name,age:age,sex:sex} = obj;
	console.log(name,age,sex);
	
	// 3.  (            )
	let {name,age,sex} = obj;
	console.log(name,age,sex);
	
	// 4.   
	let {name,age,sex,scories=10} = obj;
	console.log(name,age,sex,scories);
	
	// 5.            ，                  
	let {age=20} = obj;
	console.log(age); // 18

	//   ：...another     name                  another 
	let {name,...another} = obj;
	console.log(another);
	

	let array = [1,2,3,4];
	
	// ES5：      
	let one 	= array[0];
	let two		= array[1];
	let three	= array[2];
	let four	= array[3];
	console.log(one,two,three,four);
	
	// ES6：      
	
	// 1.    
	let {one,two,three,four}	= array	;
	console.log(one,two,three,four)		;
	
	// 2.    
	let {one,two,three,four,five}= array;
	console.log(one,two,three,four,five);		// five：undefined
	
	// 3.   
	let {one,two,three,four,five=50}= array;
	console.log(one,two,three,four,five);

// ES5：
	//     +    
	function fun(name,age,sex){
		console.log(name,age,sex);
	}
	fun('zs',18,' ');
	//     
	function fun(obj){
		console.log(obj.name,obj.age,obj.sex);
	}
	fun({name:'zs',age:18,sex:' '});

// ES6：
	function fun({name,age,sex}){
		console.log(name,age,sex);
	}
	fun({name:'ls',age:19,sex:' '});
	

	
	//     ：
	let fun = function(name){console.log(name);};
	fun("  ");
	//      =    ->    ；
	let fun = name -> console.log(name);
	
	/*         ：
		1.function    -> ,   ：goesto;
		2.      ，     ;
		3.   0 >=2，      ;
		4.        ，      ;
		5.        ，  return +    ， return ;
		6.     1  ，      ;
	*/
	
	//            
	let fun = () -> console.log('Are you Ok?');
	
	//     ，     
	let fun = name -> console.log('name：Are you Ok?');
	
	//     ，     
	let fun = (name,age) -> console.log(name,age);

	//     +return   
	let fun = score -> score+10;

	//     +return+   
	let fun = (name,age,score) -> {
		console.log(name,age,score);
		return score+10;
	};
	

let song = {
	skill:"   ",
}
let business = {
	skill:"money",
	num:999999999
}
let people ={
	...song,		//  song        people
	...business		//  business        people
}
console.log(people);

	//     
	let index = [1,2,3];
	let score = [...array,60,70,80];
	console.log(score);

	let sum = [...index , ...score];
	console.log(sum);

	//    
	let max = Math.max.apply(Math,sum);
	console.log(max);
	max = Math.max(...sum);
	console.log(max);

//      
let arr = [1,2,1,3,4,2];
//     
let set = new Set(arr);
console.log(set);
//      
let only = [...set];
console.log(only);

//   
let onlies = [...new Set(arr)];
console.log(onlies);