SOURCE

let arrLike = {
    '0': 'a',
    '1': 'b',
    '2': 'c',
    length: 3
};

//es5
var arr1 = [].slice.call(arrLike);
console.log(arr1);
//es6
var arr2 = Array.from(arrLike);
console.log(arr2);


console.log(Array.from("hello"));
let nameSet = new Set([1,2]);
console.log(nameSet);
console.log(Array.from(nameSet));

//
Array.from([1,2,3], (n) => {console.log(n)})

//
console.log(Array.of(1,2,3))

//[1, 4, -5, 10].find((n) => n < 0)


//数组实例的entries()，keys()和values()
for(let index of ['a','b'].keys()){
    console.log(index);
}
for(let value of ['a','b'].values()){
    console.log(value);
}
for(let [index, elem] of ['a','b'].entries()){
    console.log(index, elem);
}
//next 遍历
let arrNew = [1,2,3];
let arrList = arrNew.entries();
console.log(arrList.next().value);
console.log(arrList.next().value);
console.log(arrList.next().value);
console.log(arrList.next().value);