JS - Functional Programming - Higher-order Functions - map()

note-js-function-higher-order-function-map.js

// Example of map as a higher-order function because uses a callback function
var animals = [
    { name: 'Fluffykins', species: 'rabbit' },
    { name: 'Caro', species: 'dog' },
    { name: 'Hamilton', species: 'dog' },
    { name: 'Harold', species: 'fish' },
    { name: 'Ursula', species: 'cat' },
];
// map all animals and his species
var names = animals.map(function(animal){
    return animal.name + ' is a ' + animal.species
})
/**
names  [ 'Fluffykins is a rabbit',
  'Caro is a dog',
  'Hamilton is a dog',
  'Harold is a fish',
  'Ursula is a cat' ]
*/