how do I group this array in javascript

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how do I group this array in javascript

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#1 by (1 votes)

1

    tengo esto:
[
    ["preegunta 1", "estudio 1", "proyecto 1"],
    ["preegunta 1", "estudio 1", "proyecto 1"],
    ["preegunta 1", "estudio 1", "proyecto 1"],
    ["pregunta 2", "estudio 2", "proyecto 2"],
    ["pregunta 2", "estudio 2", "proyecto 2"],
    ["pregunta 2", "estudio 2", "proyecto 2"],
    ["pregunta3", "estudio 1", "proyecto 1"],
    ["pregunta3", "estudio 1", "proyecto 1"],
    ["pregunta3", "estudio 1", "proyecto 1"]
]

quiero esto:

[
    ["preegunta 1", "estudio 1", "proyecto 1"],
    ["pregunta 2", "estudio 2", "proyecto 2"],
    ["pregunta3", "estudio 1", "proyecto 1"]
]

Any function?

javascript

asked by johnnyvargast 15.06.2018 в 02:50

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1 answer

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score 1 · Accepted Answer

var arr = [
    ["preegunta 1", "estudio 1", "proyecto 1"],
    ["preegunta 1", "estudio 1", "proyecto 1"],
    ["preegunta 1", "estudio 1", "proyecto 1"],
    ["pregunta 2", "estudio 2", "proyecto 2"],
    ["pregunta 2", "estudio 2", "proyecto 2"],
    ["pregunta 2", "estudio 2", "proyecto 2"],
    ["pregunta3", "estudio 1", "proyecto 1"],
    ["pregunta3", "estudio 1", "proyecto 1"],
    ["pregunta3", "estudio 1", "proyecto 1"]
];

var temp = '';
var otroArr = [];
arr.forEach( function(a){
  if( temp != a.join() ){
    otroArr.push( a );
    temp = a.join();
  }
});

console.log( otroArr );

It occurs to me to cycle the array and convert it to a string, then compare the current iteration with the one that was saved and thus get the duplicates.

Maybe there are better ways, but that occurs to me in the first instance.