Async await in javascript

const fs = require('fs')
async function readFile() {
  try {    
    var f1 = await readFileWithPromise('/etc/passwd')
    console.log(f1.toString())
    var f2 = await readFileWithPromise('/etc/profile')
    console.log(f2.toString())
  } catch (err) {
    console.log(err)
  }
}

Có thể bạn đã miss một số snippets code

How to reverse an Array?

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

using javascript callback style error handling

flatMap()

Use flatMap() creates a new array with sub-array elements flattened by specified depth.

Đếm có bao nhiêu items giống nhau trong một array

reduce javascript. Đếm có bao nhiêu items giống nhau trong một array

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.