轉換對象數組不同的對象

Question

我有對象的數組：

[{ bags:10, pouch:small, weight:100, quantity:1 }, 
{ bags:101, pouch:large, weight:1001, quantity:11 }] 

如何可以分離該陣列分成多個對象如下所示？

small = { bags:10,weight:100,quantity:1 } 
large = { bags:101,weight:1001,quantity:11 } 

Answer 1

因此，步驟是：

1. 找到您想要的條目，

2. 的小袋

3. 複製創建一個對象你想要的屬性

所以：

var array = [{ bags:10,pouch:"small",weight:100,quantity:1},{bags:101,pouch:"large",weight:1001,quantity:11}]; 
 
var small = get(array, "small"); 
 
var large = get(array, "large"); 
 
snippet.log("small = " + JSON.stringify(small)); 
 
snippet.log("large = " + JSON.stringify(large)); 
 

 
function get(array, pouch) { 
 
    // Find the entry (on newer browsers you could use Array#find, and it 
 
    // can be shimmed; I used Array#some here) 
 
    var found; 
 
    array.some(function(entry) { 
 
    if (entry.pouch == pouch) { 
 
     found = entry; 
 
     return true; 
 
    } 
 
    }); 
 
    if (found) { 
 
    // Found it, create an object with the properties we want 
 
    return { 
 
     bags: found.bags, 
 
     weight: found.weight, 
 
     quantity: found.quantity 
 
    }; 
 
    } 
 
    return null; 
 
}

<!-- Script provides the `snippet` object, see http://meta.stackexchange.com/a/242144/134069 --> 
 
<script src="//tjcrowder.github.io/simple-snippets-console/snippet.js"></script>

Answer 2

這樣做，但我不推薦它！

var data = [{ bags: 10, pouch: 'small', weight: 100, quantity: 1 }, { bags: 101, pouch: 'large', weight: 1001, quantity: 11 }], 
 
    object = data.forEach(function (a) { 
 
     window[a.pouch] = { bags: a.bags, weight: a.weight, quantity: a.quantity }; 
 
    }); 
 

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

更好的解決方案與對象

你可以先建立一個與pouch值屬性的對象，後來分配他們想要的變量。

var data = [{ bags: 10, pouch: 'small', weight: 100, quantity: 1 }, { bags: 101, pouch: 'large', weight: 1001, quantity: 11 }], 
 
    object = data.reduce(function (r, a) { 
 
     r[a.pouch] = { bags: a.bags, weight: a.weight, quantity: a.quantity }; 
 
     return r; 
 
    }, {}); 
 

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

 
var small = object.small, 
 
    large = object.large; 
 

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