2017-09-15 75 views
-1

我有2個數組,我試圖在第二個數組中找到與第一個數組中的對象的Id相匹配的數組對象。從那裏我需要追加匹配的對象到主對象。我也只需要通過鍵值獲取前3個匹配對象。我一直在用Underscore進行嘗試,但是這隻會將匹配的數組合並在一起。這就是我所需要的,任何幫助都會很棒。通過匹配值搜索輔助數組併合併到主數組中

var primaryArray = [ 
    { 
    "Name": "Main 1", 
    "Id": "1" 
    }, 
    { 
    "Name": "Main 2", 
    "Id": "2" 
    } 
] 


var secondaryArray = [ 
    { 
    "name": "Person 1", 
    "mainitemId": "1", 
    "count": 120 
    }, 
    { 
    "name": "Person 2", 
    "mainitemId": "1", 
    "count": 80 
    }, 
    { 
    "name": "Person 3", 
    "mainitemId": "1", 
    "count": 125 
    }, 
    { 
    "name": "Person 4", 
    "mainitemId": "1", 
    "count": 130 
    }, 
    { 
    "name": "Person 5", 
    "mainitemId": "2", 
    "count": 90 
    }, 
    { 
    "name": "Person 6", 
    "mainitemId": "2", 
    "count": 85 
    }, 
    { 
    "name": "Person 7", 
    "mainitemId": "2", 
    "count": 105 
    }, 
    { 
    "name": "Person 8", 
    "mainitemId": "2", 
    "count": 110 
    } 
] 


var resultArray = [ 
    { 
    "Name": "Main 1", 
    "Id": 1, 
    "people": [ 
     { 
     "name": "Person 4", 
     "mainitemId": "1", 
     "count": 130 
     }, 
     { 
     "name": "Person 3", 
     "mainitemId": "1", 
     "count": 125 
     }, 
     { 
     "name": "Person 1", 
     "mainitemId": "1", 
     "count": 120 
     } 
    ] 
    }, 
    { 
    "Name": "Main 2", 
    "Id": 2, 
    "people": [ 
     { 
     "name": "Person 8", 
     "mainitemId": "2", 
     "count": 110 
     }, 
     { 
     "name": "Person 7", 
     "mainitemId": "2", 
     "count": 105 
     }, 
     { 
     "name": "Person 5", 
     "mainitemId": "2", 
     "count": 90 
     } 
    ] 
    } 
] 
+0

您已經嘗試了什麼? –

+1

您正在尋找幾件事情,合併數組,按對象值搜索並可能進行排序以確定排名前3(**決定top3的**是什麼?**)。網上有很多例子說明如何做每個部分。挑一個並嘗試一下。如果您在代碼方面存在問題,請將其發佈到此處,然後查看它。此外,請參閱[**我如何提出一個好問題**](https://stackoverflow.com/help/how-to-ask)以及如果適用,使用您自己的代碼來解決問題,[* *如何創建一個最小化,完整和可驗證的示例**](https://stackoverflow.com/help/mcve) – Nope

回答

0

如果您想根據值獲得前3名,這應該是...

var result = primaryArray.map(item => { 
    item.people = secondaryArray.filter(peop => peop.mainitemId === item.Id) 
           .sort((a, b) => b.count - a.count) 
           .slice(0, 3); 
    return item;   
}) 

最終結果:

enter image description here

+0

感謝Faly,這是完美的,讓我頭疼,我一直在嘗試_.map> _。擴展> _。找到,但沒有給我我需要的結果的第一部分! – dbach

+0

不客氣! – Faly