Page 98 - JavaScript

function func() {
console.log(arguments);
}
func(1, 2, 3); // → [1, 2, 3]

Convert Array-like Objects to Arrays in ES6

1. Array.from:

6

const arrayLike = {
0: 'Value 0',
1: 'Value 1',
length: 2
};
arrayLike.forEach(value => {/* Do something */}); // Errors
const realArray = Array.from(arrayLike);
realArray.forEach(value => {/* Do something */}); // Works

2. for...of:

6

var realArray = [];
for(const element of arrayLike) {
realArray.append(element);
}

3. Spread operator:

6

[...arrayLike]

4. Object.values:

7

var realArray = Object.values(arrayLike);

5. Object.keys:

6

var realArray = Object
.keys(arrayLike)
.map((key) => arrayLike[key]);

Convert Array-like Objects to Arrays in ≤ ES5

https://riptutorial.com/ 55