Question

我有一个对象数组：

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

如何将此数组分成以下所示的多个对象？

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

Answer 1

它做到了，但我不推荐它！

＆＃13;

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>');

＆＃13;

使用对象更好的解决方案

您可以先使用pouch值作为属性构建一个对象，然后将它们分配给所需的变量。

＆＃13;

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>');

＆＃13;

Answer 2

所以步骤是：

找到您想要的条目，
为小袋创建一个对象
复制所需的属性

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;
}

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<script src="//tjcrowder.github.io/simple-snippets-console/snippet.js"></script>

将对象数组转换为不同的对象

2 个答案: