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Accepted
Alan
Asked: 2020-09-07 06:10:42 +0800 CST 2020-09-07 06:10:42 +0800 CST

How to remove the position of a two-dimensional vector with empty data and rearrange its size?

  • 772

I have a vector in which I try to eliminate the spaces that are empty in their entirety, something like this:

array[0][0:"6371", 1:"2016-05-31", 2:"Juan Jose  Mendoza"];
array[1][0:"", 1:"", 2:""];
array[2][0:"6372", 1:"2016-05-31", 2:"Andrea Marcela Pena"];

what I am looking for is the way to eliminate the empty line and re-arrange the vector in a simple way (without the need to go through it or something like that) either in or the final result would be something like this:

array[0][0:"6371", 1:"2016-05-31", 2:"Juan Jose  Mendoza"];
array[1][0:"6372", 1:"2016-05-31", 2:"Andrea Marcela Pena"];

where the position array[1][0:"", 1:"", 2:""];, having all its fields empty, will be removed and we will rearrange the vector.

javascript

2 Answers

  1. If I understand correctly, you have a Arraycontaining Objetos, " Array-like Objects" and you want to filter that array by removing positions whose objects are completely empty. You can use the following code:

    var array = [
  {0:"6371", 1:"2016-05-31", 2:"Juan Jose  Mendoza"},
  {0:"", 1:"", 2:""},
  {0:"6372", 1:"2016-05-31", 2:"Andrea Marcela Pena"}
];

var estanTodosLosElementosDelArrayVacios = function(obj){
  return Object
          //.values(obj)
          .keys(obj).map( el => obj[el] )
          .filter( el => el.length )
          .length;
}

var filtrado = array.filter(estanTodosLosElementosDelArrayVacios);

console.log(filtrado);

    • 3
  2. Best Answer

    Here I leave an alternative without traversing the entire array. The idea is as follows: convert the array to a string, remove the empty elements, convert the string back to an array.

    The code could be like this:

    var miArray = new Array();
    
miArray[0] = {0:"6371", 1:"2016-05-31", 2:"Juan Jose  Mendoza"};
miArray[1] = {0:"", 1:"", 2:""};
miArray[2] = {0:"", 1:"", 2:""};
miArray[3] = {0:"6372", 1:"2016-05-31", 2:"Andrea Marcela Pena"};

console.log(miArray);

var texto = JSON.stringify(miArray)                      // transformar en cadena
                .replace(/{"0":"","1":"","2":""}/g, "")  // eliminar elementos vacíos
                .replace(/(\}(,)+\{)/g,"},{");           // quitar comas innecesarias

miArray = JSON.parse(texto);

console.log(miArray);

    • 1