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JavaScript JavaScript Array Iteration Methods Combining Array Methods Nested Data

Keytron Brown
Keytron Brown
15,828 Points
Posted by Keytron Brown
Keytron Brown
15,828 Points

Lost

I dont understand this challenge. Just needed to post this to get answers. No need to answer the question.

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

1 Answer

Jason Larson
Jason Larson
8,361 Points

I know you didn't want an answer, but this is for anybody else that might be looking at this question. For someone that was "lost", you were so close to getting this correct. All that was needed was to add another level to get the hobbies in the map() method. You have customer.hobbies, but each customer object doesn't have a property named hobbies. They have an object named personal that contains the property hobbies. The final code should have been

hobbies = customers
  .map(customer => customer.personal.hobbies)
  .reduce((customer, hobby) => [...customer, ...hobby]);