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)
  }
}

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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.

encode/decode base64 with JS

Encoding to base64 is done with the btoa command