javascript-适合多个类别并按这些类别分组的JSON克隆对象

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我发现一些JavaScript,可以通过某些属性对JSON对象进行分组.它很好用,但是我需要能够克隆多个类别中的对象,并按这些类别/属性对其进行分组.例如：

 var products = [{"Name": "Product 1", 
  "Details": "Lorum Ipsum lorum ipsum 1",
  "Cost": 100,
  "Function": "Engineering",
  "Type": "Laptop, Tablet", 
"ID":0
},
{"Name":"Product 2",
  "Details": "Lorum Ipsum lorum ipsum 2",
  "Cost": 120,
  "Function": "Healthcare",
  "Type": "Laptop, Tablet", 
"ID":1
},
{"Name": "Product 3",
  "Details": "Lorum Ipsum lorum ipsum 3",
  "Cost": 130,
  "Function": "Engineering",
  "Type": "Desktop", 
"ID":2
}];

应该成为

[{"Name": "Product 1", 
  "Details": "Lorum Ipsum lorum ipsum 1",
  "Cost": 100,
  "Function": "Engineering",
  "Type": "Laptop", 
"ID":0
},
{"Name":"Product 2",
  "Details": "Lorum Ipsum lorum ipsum 2",
  "Cost": 120,
  "Function": "Healthcare",
  "Type": "Laptop", 
"ID":1
}],
[{"Name": "Product 1", 
  "Details": "Lorum Ipsum lorum ipsum 1",
  "Cost": 100,
  "Function": "Engineering",
  "Type": "Tablet", 
"ID":0
},
{"Name":"Product 2",
  "Details": "Lorum Ipsum lorum ipsum 2",
  "Cost": 120,
  "Function": "Healthcare",
  "Type": "Tablet", 
"ID":1
}],
[{"Name": "Product 3",
  "Details": "Lorum Ipsum lorum ipsum 3",
  "Cost": 130,
  "Function": "Engineering",
  "Type": "Desktop", 
"ID":2
}]

到目前为止,这是我的代码：

 function LoadDevicesByType(){
    var result = groupBy(products, function(item)
    {
      return [item.Type];
    });
    return result;  
  }

  function groupBy( array , f )
  {
    var groups = {};
    array.forEach( function( o )
    {
      var group = JSON.stringify( f(o) );
      groups[group] = groups[group] || [];
      groups[group].push( o );  
    });
    return Object.keys(groups).map( function( group )
    {
      return groups[group]; 
    })
  }

知道我如何实现这一目标吗？现在我只是按Type属性分组

解决方法:

只需将Type字符串拆分并复制外部对象：

const input = [{"Name": "Product 1", 
  "Details": "Lorum Ipsum lorum ipsum 1",
  "Cost": 100,
  "Function": "Engineering",
  "Type": "Laptop, Tablet", 
"ID":0
},
{"Name":"Product 2",
  "Details": "Lorum Ipsum lorum ipsum 2",
  "Cost": 120,
  "Function": "Healthcare",
  "Type": "Laptop, Tablet", 
"ID":1
},
{"Name": "Product 3",
  "Details": "Lorum Ipsum lorum ipsum 3",
  "Cost": 130,
  "Function": "Engineering",
  "Type": "Desktop", 
"ID":2
}];

const separatedByTypeObj = {};
input.forEach(product => {
  product.Type.split(', ').forEach(type => {
    const newProduct = JSON.parse(JSON.stringify(product));
    newProduct.Type = type;
    if (!separatedByTypeObj[type]) separatedByTypeObj[type] = [];
    separatedByTypeObj[type].push(newProduct)
  });
});
const separatedByTypeArr = Object.values(separatedByTypeObj);
console.log(separatedByTypeArr);

(使用.reduce会更优雅,但是如果您不熟悉数组方法,则forEach可能更容易理解)

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