doppelte Objekte nach Wertnamen filtern und in neues Array einfügen

Question

Ich versuche, doppelte Objekte im Array nach Objektwertnamen zu filtern und in neues Array namens finalResult einzufügen.

Grundsätzlich möchte ich nur Objekte mit eindeutigen Ländernamen in meinem neuen Array haben.

Beispiel Arrays:

var result = [ 
    {country: 'united states', numofdistributors: 5}, 
    {country: 'united states', numofdistributors: 5}, 
    {country: 'brazil', numofdistributors: 2}, 
    {country: 'Germany', numofdistributors: 1}, 
    {country: 'india', numofdistributors: 6}, 
    {country: 'united states', numofdistributors: 5}, 
    {country: 'Egypt', numofdistributors: 1}, 
    {country: 'Germany', numofdistributors: 1}, 
]; 

Dies ist, was ich meine Array soll sich herausstellen, wie: ohne Glück und nur Frustration

var finalResult = [ 
    {country: 'united states', numofdistributors: 5}, 
    {country: 'brazil', numofdistributors: 2}, 
    {country: 'Germany', numofdistributors: 1}, 
    {country: 'india', numofdistributors: 6}, 
    {country: 'Egypt', numofdistributors: 1}, 
]; 

Hier ist mein Versuch, zu lösen:

var finalResults = []; 
result.forEach(function(country){ 
    if(finalResults.indexOf(country.country) != -1){ 
     console.log('already added'); 
    }else { 
     //console.log('Does not exist'); 
     finalResults.push(country); 
}); 
console.log(finalResults); 

Answer 1

Sie könnten die Daten mit Array#filter filtern und ein Objekt für bereits eingefügtes Element verwenden s.

var result = [{ country: 'united states', numofdistributors: 5 }, { country: 'united states', numofdistributors: 5 }, { country: 'brazil', numofdistributors: 2 }, { country: 'Germany', numofdistributors: 1 }, { country: 'india', numofdistributors: 6 }, { country: 'united states', numofdistributors: 5 }, { country: 'Egypt', numofdistributors: 1 }, { country: 'Germany', numofdistributors: 1 }, ], 
 
    finalResult = result.filter(function (a) { 
 
     var key = a.country + '|' + a.numofdistributors; 
 
     if (!this[key]) { 
 
      this[key] = true; 
 
      return true; 
 
     } 
 
    }, Object.create(null)); 
 

 
document.write('<pre>' + JSON.stringify(finalResult, 0, 4) + '</pre>');

Answer 2

Sie es bereits getan. Nur ein einfacher Fehler:

var result = [ 
 
    {country: 'united states', numofdistributors: 5}, 
 
    {country: 'united states', numofdistributors: 5}, 
 
    {country: 'brazil', numofdistributors: 2}, 
 
    {country: 'Germany', numofdistributors: 1}, 
 
    {country: 'india', numofdistributors: 6}, 
 
    {country: 'united states', numofdistributors: 5}, 
 
    {country: 'Egypt', numofdistributors: 1}, 
 
    {country: 'Germany', numofdistributors: 1}, 
 
]; 
 

 
var finalResult = [ 
 
    {country: 'united states', numofdistributors: 5}, 
 
    {country: 'brazil', numofdistributors: 2}, 
 
    {country: 'Germany', numofdistributors: 1}, 
 
    {country: 'india', numofdistributors: 6}, 
 
    {country: 'Egypt', numofdistributors: 1}, 
 
]; 
 

 
var finalResults = []; 
 
var countries = []; 
 
result.forEach(function(country){ 
 
    if(countries.indexOf(country.country) != -1){ 
 
     console.log('already added'); 
 
    }else { 
 
     //console.log('Does not exist'); 
 
     finalResults.push(country); 
 
     countries.push(country.country); 
 
} 
 
} 
 
); 
 
console.log(finalResults);