Mapping example

exampleMap.js

const animals = ['dog', 'cat', 'bird', 'giraffe'];

// es5
animals.map(function(currentValue, index, array) {
  return 'super ' + currentValue;
});

//es6
animals.map((currentValue, index, array) => `super ${currentValue}`);
// result: ['super dog', 'super cat', 'super bird'];

/*
  As it maps over the values, currentValue is equal to 'dog', then 'cat', then 'bird' etc
*/