Functional Javascript

functional.js

// Regular function
function myFunction(a, b) {
  return a + b
}

// Lambda function
const myLambda = (a, b) => a + b

// First Class type
const handler = () => console.log('this is a function')
document.eventListener('click', handler)

// High order function - Accept functiona s argument and return function as value
// First order function - Not Accept function as argument and does not return function as value
const firstOrder = () => console.log('first order function')
const highOrder = otherFunction => otherFunction()
highOrder(firstOrder)

// Unary function - only one argument
const unaryFunction = argument => console.log(argument)
const binaryFunction = (arg1, arg2) => console.log(`this method contais 2 args: ${arg1}, ${arg2}`)
const ternaryFunction = (arg1, arg2, arg3) => console.log(`this method contais 3 args: ${arg1}, ${arg2}, ${arg3}`)