Javascript - How can I get the values from an array inside an array? [duplicate]

Javascript – How can I get the values from an array inside an array? [duplicate]

Last updated: 2023/12/09 at 7:27 PM

Admin

1 Min Read

Problem:

In the below examples, why am I not getting any value?

Contents

Problem:Solution:

const people = [{
    name: "mike",
    jobs: ["waiter", "doctor"]
  },
  {
    name: "nils",
    jobs: ["singer", "actor"]
  },
  {
    name: "nils",
    jobs: ["nurse", "actor"]
  },
]


const iterate = people.map(person => {
  return person.jobs.map(job => {
    return job;
  })
  return res;
})
console.log(iterate)

const people = [{
    name: "mike",
    jobs: ["waiter", "doctor"]
  },
  {
    name: "nils",
    jobs: ["singer", "actor"]
  },
  {
    name: "nils",
    jobs: ["nurse", "actor"]
  },
]

let res = []
const iterate = people.map(person => {
  return person.jobs.map(job => {
    res.push(job)
  })
  return res;
})
console.log(iterate)

Solution:

The code reformats the data from an array of objects into a new array of arrays. Each inner array now contains the jobs of a specific person.

const people = [
  {
    name: "mike",
    jobs: ["waiter", "doctor"]
  },
  {
    name: "nils",
    jobs: ["singer", "actor"]
  },
  {
    name: "nils",
    jobs: ["nurse", "actor"]
  }
];

const iterate = [].concat(...people.map(person => person.jobs));
console.log(iterate);