重複するオブジェクトを値の名前でフィルタリングして新しい配列に配置します

Question

オブジェクト値の名前で配列の重複オブジェクトをフィルタリングし、finalResultという新しい配列に配置しようとしています。

基本的に私は、新しい配列内に一意の国名を持つオブジェクトしか持たず、

例アレイ：

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}, 
]; 

これは私が私の配列は次のように判明したいものである：ここでは

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

は運だけ欲求不満なしで解決する私の試みです：

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

Array#filterでデータをフィルタリングし、既に挿入された項目にオブジェクトを使用することができます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

あなたはすでにそれを行っ。ただ、単純なミス：

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);