How to reverse an Array?

Reversing an array in JS is really simple with the standard array method. Like below

const str = ['a', 'b', 'c', 'd', 'e'];
console.log(str.reverse());
// Output: > Array ["e", "d", "c", "b", "a"]

Without using reverse() method:

const str = ['a', 'b', 'c', 'd', 'e'];
const str1 = [];
  for (let i = str.length - 1; i >= 0; i--) {
str1.push(str[i]);
  }
console.log(str1);
// Output: > Array ["e", "d", "c", "b", "a"]

Có thể bạn đã miss một số snippets code

Rest Operator for Objects

Now we can use rest on the properties of an Object. It allows us to explicitly extract certain named variables, and assign any uncalled variables into a catchall Object.

Merge Array

How to combine two sorted arrays into one? We can do this easily with the spread operator.

JavaScript: async/await with forEach

JavaScript: async/await with forEach()

Async await in javascript

Spread Operator for Objects

Using the spread operator during an Object declaration will assign the properties of the referenced Object to the new Object.