Creating array from another array

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Creating array from another array

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#1 by (3 votes)

3

var contatos = [
  {
    nome: 'Alex Silva Souza',
    endereco: 'Travessa 1, casa 233',
    tel: '2235-3514',
    id:1123,
    email: '****',
  },
  {
    nome: 'Beatriz Santana Pinto',
    endereco: 'Rua cardoso de moraes, casa 21',
    tel: '3448-3514',
    id:1124,
    email: '[email protected]'
  },
  {
    nome: 'Felippe Roger Teles',
    endereco: 'Rua Ana teles, casa 107',
    tel: '2556-1818',
    id:1125,
    email: '****'
  },
  {
    nome: 'Rogerio Machado da Silva',
    endereco: 'Rua Baronesa, 231 ap101',
    tel: '98337-3317',
    id:1126,
    email: '[email protected]'
  },
];


var identificacao = []

My intention is to put within the array identification only the name and id properties. It would look like this:

var identificacao = [
  {
    nome: 'Alex Silva Souza',
    id:1123,
  },
  {
    nome: 'Beatriz Santana Pinto',
    id:1124,
  }
];

But what I'm doing returns this to me:

var identificacao = ["Alex Silva Souza", 1123, "Beatriz Santana Pinto", 1124, "Felippe Roger Teles", 1125, "Rogerio Machado da Silva", 1126]

javascript

asked by anonymous 04.10.2017 / 14:58

1 answer

Array.splice does not work as expected Customize the "Generate toString () ..." of eclipse to print the path of a class

score 3 · Accepted Answer

You should use .map to map an object to another.

var subselecao = contatos.map(function(contacto) {
  return {
    nome: contacto.nome,
    id: contacto.id
  };
});

An example would look like this:

var contatos = [{
    nome: 'Alex Silva Souza',
    endereco: 'Travessa 1, casa 233',
    tel: '2235-3514',
    id: 1123,
    email: '****',
  },
  {
    nome: 'Beatriz Santana Pinto',
    endereco: 'Rua cardoso de moraes, casa 21',
    tel: '3448-3514',
    id: 1124,
    email: '[email protected]'
  },
  {
    nome: 'Felippe Roger Teles',
    endereco: 'Rua Ana teles, casa 107',
    tel: '2556-1818',
    id: 1125,
    email: '****'
  },
  {
    nome: 'Rogerio Machado da Silva',
    endereco: 'Rua Baronesa, 231 ap101',
    tel: '98337-3317',
    id: 1126,
    email: '[email protected]'
  },
];

var subselecao = contatos.map(function(contacto) {
  return {
    nome: contacto.nome,
    id: contacto.id
  };
});

console.log(subselecao);

In modern browsers it could be:

const subselecao = contatos.map(({nome, id}) => ({nome, id}));