Pure functions examples

pure.js

/*
  pure functions are those that:
      - are syncronous
      - same input returns same output
      - do not have collateral damage (change values from different scopes)
*/

//Examples of pure functions

function (a, b) {
 return a + b; 
}

function changeProp(obj) { //ES6 only
 return {
  ...obj,
  name: 'Different name'
 };
}