オブジェクトの配列を反復処理してカスタムオブジェクトを出力する

Question

Typescriptでオブジェクトの配列からカスタムオブジェクトを構築する必要があります。

以下の例では、salesman_1_nameが配列に含まれる回数をカウントし、各Salesman_1_nameのグロスを追加し、salesman_1_nameごとに保証がnullでない場合にカウントする方法を教えてください。私が持っているのであれば：

[ 
    {salesman_1_name:Brian, gross:100, warranty: Easycare}, 
    {salesman_1_name:Brian, gross:100, warranty: Easycare}, 
    {salesman_1_name:Brian, gross:100, warranty: null}, 
    {salesman_1_name:Kreso, gross:100, warranty: null}, 
    {salesman_1_name:Filip, gross:100, warranty: Easycare} 
] 

を私は出力する必要があるでしょう：

[ 
    Name:Brian, Count:3, Gross:300, WarrantyCount:2, 
    Name:Kreso, Count:1, Gross:100, WarrantyCount:0, 
    Name:Filip, Count:1, Gross:100, WarrantyCount:1 
] 

Answer 1

あなたは名前のグループへの参照としてオブジェクトを使用して、凝集を作ることができます。

var data = [{ salesman_1_name: 'Brian', gross: 100, warranty: 'Easycare' }, { salesman_1_name: 'Brian', gross: 100, warranty: 'Easycare' }, { salesman_1_name: 'Brian', gross: 100, warranty: null }, { salesman_1_name: 'Kreso', gross: 100, warranty: null }, { salesman_1_name: 'Filip', gross: 100, warranty: 'Easycare' }], 
 
    grouped = []; 
 

 
data.forEach(function (a) { 
 
    if (!this[a.salesman_1_name]) { 
 
     this[a.salesman_1_name] = { Name: a.salesman_1_name, Count: 0, Gross: 0, WarrantyCount: 0 }; 
 
     grouped.push(this[a.salesman_1_name]); 
 
    } 
 
    this[a.salesman_1_name].Count++; 
 
    this[a.salesman_1_name].Gross += a.gross; 
 
    a.warranty !== null && this[a.salesman_1_name].WarrantyCount++;  
 
}, Object.create(null)); 
 

 
console.log(grouped);

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Answer 2

data.reduce((acc, cur) => { 
    const obj = acc.find(x => x.Name === cur.salesman_1_name); 
    if (obj) { 
    obj.Gross += cur.gross; 
    obj.WarrantyCount = cur.warranty !== null ? obj.WarrantyCount + 1 : obj.WarrantyCount; 
    } else { 
    acc.push({ Name: cur.salesman_1_name, Gross: cur.gross, WarrantyCount: cur.warranty !== null ? 1 : 0 }); 
    } 
    return acc; 
}, []); 

Answer 3

// Code goes here 
 

 
var data = [{ 
 
    salesman_1_name: 'Brian', 
 
    gross: 100, 
 
    warranty: 'Easycare' 
 
}, { 
 
    salesman_1_name: 'Brian', 
 
    gross: 100, 
 
    warranty: 'Easycare' 
 
}, { 
 
    salesman_1_name: 'Brian', 
 
    gross: 100, 
 
    warranty: null 
 
}, { 
 
    salesman_1_name: 'Kreso', 
 
    gross: 100, 
 
    warranty: null 
 
}, { 
 
    salesman_1_name: 'Filip', 
 
    gross: 100, 
 
    warranty: 'Easycare' 
 
}]; 
 

 

 
var result = (function(myArray) { 
 
    var obj = []; //also can be used Object.values(dataCollector) 
 
    var dataCollector = myArray.reduce(function(dataCollector, currentItem) { 
 

 
    if (!dataCollector[currentItem['salesman_1_name']]) { 
 
     dataCollector[currentItem['salesman_1_name']] = { 
 
     Name: currentItem.salesman_1_name, 
 
     Count: 0, 
 
     Gross: currentItem.gross, 
 
     WarrantyCount: currentItem['salesman_1_name'].warranty != null ? 0 : 1 
 
     }; 
 

 
    } else { 
 
     dataCollector[currentItem['salesman_1_name']].Count++; 
 
     dataCollector[currentItem['salesman_1_name']].Gross += currentItem.gross; 
 
     if (currentItem['salesman_1_name'].warranty !== null) { 
 
     dataCollector[currentItem['salesman_1_name']].WarrantyCount++; 
 
     } 
 

 
    } 
 

 
    return dataCollector; 
 

 
    }, {}); 
 

 
    for (var key in dataCollector) { 
 
    if (dataCollector.hasOwnProperty(key)) { 
 
     obj.push(dataCollector[key]); 
 
    } 
 
    } 
 
    return obj; 
 

 
})(data) 
 

 
console.log(result);

Answer 4

var rawSalesmanData = [ 
 
    { salesman_1_name: "Brian", gross: 100, warranty: "Easycare" }, 
 
    { salesman_1_name: "Brian", gross: 100, warranty: "Easycare" }, 
 
    { salesman_1_name: "Brian", gross: 100, warranty: null }, 
 
    { salesman_1_name: "Kreso", gross: 100, warranty: null }, 
 
    { salesman_1_name: "Filip", gross: 100, warranty: "Easycare" } 
 
]; 
 

 
var salesmanSpecificList = rawSalesmanData.reduce(function (collector, rawDataItem/*, idx, rawDataList*/) { 
 

 
    var map  = collector.map; 
 
    var key  = rawDataItem.salesman_1_name; 
 
    var namedItem = map[key]; 
 

 
    if (!namedItem) { 
 
     namedItem = map[key] = { 
 
      name   : key, 
 
      occurencyCount : 0, 
 
      grossTotal  : 0, 
 
      warrantyCount : 0 
 
     }; 
 
     collector.list.push(namedItem); 
 
    } 
 
    namedItem.occurencyCount++; 
 
    namedItem.grossTotal = (namedItem.grossTotal + rawDataItem.gross); 
 
    namedItem.warrantyCount = (namedItem.warrantyCount + ((rawDataItem.warranty !== null) ? 1 : 0)); 
 

 
    return collector; 
 

 
}, { 
 

 
    map : {}, 
 
    list: [] 
 

 
}).list; 
 

 

 
console.log("salesmanSpecificList : ", salesmanSpecificList);