Filter Map Reduce

filter-map-reduce.js

const data = [
    {
      name: 'Butters',
      age: 3,
      type: 'dog'
    },
    {
      name: 'Lizzy',
      age: 6,
      type: 'dog'
    },
    {
      name: 'Red',
      age: 1,
      type: 'cat'
    },
    {
      name: 'Joey',
      age: 3,
      type: 'dog'
    },
  ];



  const dog = (animal) => animal.type === 'dog';
  const dogYears = (animal) => animal.age * 7;
  const sum = (acc, age) => acc + age;


  const sumInDogYears = data.filter(dog)
  .map(dogYears).reduce(sum);

  console.log(sumInDogYears);