How to remove empty elements from nested arrays

Question

I have the following array named parsedAutor and I need to remove the empty elements from the nested arrays.

[
  ['John Doe', '', 'CPF 000.000.000-00'],
  ['30/05/2018 - Vara de Delitos de Roubo e Extorsão'],
  ['John Doe', '', 'CPF 000.000.000-00'],
  ['29/02/2016 - 1ª Vara Criminal'],
  ['John Doe', '', 'CPF 000.000.000-00'],
  ['18/02/2016 - 3º Juizado Especial Cível'],
  ['John Doe', '', 'CPF 000.000.000-00'],
  ['18/02/2016 - 3º Juizado Especial Cível']
]

How do I manage to do it? I've been trying to map the elements and then filter them, but it's not working and I think I'm doing it wrong.

Here's what I've been trying to do.

const autor = $('div[class="espacamentoLinhas"]').toArray();

let parsedAutor = autor.map((x) => x.children[2].data.trim());

console.log(parsedAutor);

parsedAutor = parsedAutor.map((x) => x.split('\n').map((y) => y.trim()));

console.log(parsedAutor);

// note that the code above is just to get the context from where I taking the values,  please focus on the code below

const filteredAutor = parsedAutor.map((x) => {
  x.filter((y) => y !== '');
});

console.log(filteredAutor);

But it returns me eight undefined values, what am I doing wrong?

Thanks in advance.

obviously you could change the splitting part to allow more multiple empty lines. — Nina Scholz, Jan 16 '20 at 15:16
I've submitted an edit to your question, keep in mind that according to Brazilian law(And common sense), you should not expose the CPF numbers and person names, when asking questions, always use mock values. — Nick, Jan 16 '20 at 18:54

score 1 · Answer 1 · answered Jan 16 '20 at 15:08

1

Your code is almost correct! You need to return the filter on x, or shorten it.

const filteredAutor = parsedAutor.map((x) => x.filter((y) => y !== ''));

Or

const filteredAutor = parsedAutor.map((x) => {
    return x.filter((y) => y !== '');
});

answered Jan 16 '20 at 15:08

Mathew Berg

28,084
11
68
89

score 1 · Accepted Answer · answered Jan 16 '20 at 15:08

You Need return the filter on x, or shorten it. return a value from your map() callback, either by using the return statement or removing the braces to make it an expression arrow function.

const filteredAutor = parsedAutor.map((x) => x.filter((y) => y !== ''));

or

const filteredAutor = parsedAutor.map((x) => {
    return x.filter((y) => y !== '');
});

score 1 · Answer 3 · answered Jan 16 '20 at 15:09

1

You need to return a value from your map() callback, either by using the return statement or removing the braces to make it an expression arrow function.

answered Jan 16 '20 at 15:09

SLaks

837,282
173
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score 1 · Answer 4 · answered Jan 16 '20 at 15:09

1

You need to return the value from map.

const filteredAutor = parsedAutor.map((x) => {
   return x.filter((y) => y !== '');
});

Or else just do

const filteredAutor = parsedAutor.map(x => x.filter(y => y !== ''));

answered Jan 16 '20 at 15:09

Archie

901
4
11

score 0 · Answer 5 · answered Jan 16 '20 at 15:26

may be this one ?

let myDoubleArray = [ [ 'Gladson de Lima Cameli', '', 'CPF 434.611.072-04' ]
                    , [ '30/05/2018 - Vara de Delitos de Roubo e Extorsão' ]
                    , [ 'Gladson de Lima Cameli', '', 'CPF 434.611.072-04' ]
                    , [ '29/02/2016 - 1ª Vara Criminal' ]
                    , [ 'Gladson de Lima Cameli', '', 'CPF 434.611.072-04' ]
                    , [ '18/02/2016 - 3º Juizado Especial Cível' ]
                    , [ 'Gladson de Lima Cameli', '', 'CPF 434.611.072-04' ]
                    , [ '18/02/2016 - 3º Juizado Especial Cível' ]
                    ]
// remove empty elements

for (let inArr of myDoubleArray)
  {
  for(let i = inArr.length;i--;) {  if (inArr[i]==='') inArr.splice(i,1)  }
  }

console.log(myDoubleArray)

How to remove empty elements from nested arrays

5 Answers5