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JavaScript JavaScript Array Iteration Methods Combining Array Methods Nested Data

Posted by Daniel Benisti
.a{fill-rule:evenodd;}techdegree seal-36
Daniel Benisti
Front End Web Development Techdegree Graduate 22,224 Points

suck with the last task

didnt solve this task

app.js 
const customers = [
  {
    name: "Tyrone",
    personal: {
      age: 33,
      hobbies: ["Bicycling", "Camping"]
    }
  },
  {
    name: "Elizabeth",
    personal: {
      age: 25,
      hobbies: ["Guitar", "Reading", "Gardening"]
    }
  },
  {
    name: "Penny",
    personal: {
      age: 36,
      hobbies: ["Comics", "Chess", "Legos"]
    }
  }
];
let hobbies;


hobbies = customers.map(customer => customer).map(item => item)
  .reduce((acc , item) => item ,[])
// hobbies should be: ["Bicycling", "Camping", "Guitar", "Reading", "Gardening", "Comics", "Chess", "Legos"]
// Write your code below

2 Answers

Jesus Mendoza
Jesus Mendoza
23,288 Points
Jesus Mendoza
Jesus Mendoza
23,288 Points

Hi Daniel,

For this task you have to return an array of hobbies using the reduce method, it can be done like this

const customers = [
  {
    name: "Tyrone",
    personal: {
      age: 33,
      hobbies: ["Bicycling", "Camping"]
    }
  },
  {
    name: "Elizabeth",
    personal: {
      age: 25,
      hobbies: ["Guitar", "Reading", "Gardening"]
    }
  },
  {
    name: "Penny",
    personal: {
      age: 36,
      hobbies: ["Comics", "Chess", "Legos"]
    }
  }
];
let hobbies;

// We use the reduce method in our array of objects
hobbies = customers.reduce((array, customer) => {
    // We assign the new array value with customer.personal.hobbies added to it using concat
    array = array.concat(customer.personal.hobbies);

    return array;
}, []);
Daniel Benisti
.a{fill-rule:evenodd;}techdegree seal-36
Daniel Benisti
Front End Web Development Techdegree Graduate 22,224 Points

so close . thanks !

Jesus Mendoza
Jesus Mendoza
23,288 Points
Jesus Mendoza
Jesus Mendoza
23,288 Points

No problem.

Did you understand the solution?

Daniel Benisti
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Daniel Benisti
Front End Web Development Techdegree Graduate 22,224 Points
Daniel Benisti
.a{fill-rule:evenodd;}techdegree seal-36
Daniel Benisti
Front End Web Development Techdegree Graduate 22,224 Points

yes