Higher order function examples

index.js

function outter () {
  return function(wordToPrint) {
    console.log('outter()(wordToPrint)   -->', wordToPrint)
  }
}

//  Invoke `outter` and save returned value (function) in a variable
const inner = outter();
inner('Hello');

// Or we can do everything in one expression
outter()('Bye');


// Same pattern with additional function returning a function
function triple () {
  return function() {
    return function(wordToPrint) {
      console.log('triple()()(wordToPrint)  -->', wordToPrint)
    }
  }
}

triple()()('hi hi hi')



// Same pattern where we pass parameter to each function
function doubleWithParams (firstWord) {
  return function (secondWord) {
    console.log('doubleWithParams(firstWord)(secondWord)   -->',  firstWord + secondWord)
  }
}


doubleWithParams('Bat')('man');