Remove some properties from array of javascript ob

问题:

I would like to remove some properties from an array of javascript objects. Here is the array of objects.

obj_array = [{
        "DATA_ID": 1,
        "DATA_NAME": "Jim",
        "DATA_BB_TYP": 2,
        "DATA_MAC": "5474",
    },
    {
        "DATA_ID": 3,
        "DATA_NAME": "Fro",
        "DATA_BB_TYP": 33,
        "DATA_MAC": "8e30",
    },
    {
        "DATA_ID": 2,
        "DATA_NAME": "Jimb",
        "DATA_BB_TYP": 2,
        "DATA_MAC": "45e8",
    },
    {
        "DATA_ID": 4,
        "DATA_NAME": "Kht1",
        "DATA_BB_TYP": 35,
        "DATA_MAC": "58d0",
    },
    {
        "DATA_ID": 6,
        "DATA_NAME": "Sens",
        "DATA_BB_TYP": 34,
        "DATA_MAC": "d004",
    }
]

I have this string array which specifies what properties to remove.

var str_array_criteria = ["DATA_BB_TYP", "DATA_MAC"];

After removal, the array of object will look like this;

obj_array_removed = [{
        "DATA_ID": 1,
        "DATA_NAME": "Jim",        
    },
    {
        "DATA_ID": 3,
        "DATA_NAME": "Fro",
    },
    {
        "DATA_ID": 2,
        "DATA_NAME": "Jimb",
    },
    {
        "DATA_ID": 4,
        "DATA_NAME": "Kht1",
    },
    {
        "DATA_ID": 6,
        "DATA_NAME": "Sens",
    }
]

I am using node.js v6.

回答1:

You can use underscore to achieve this. It's much simpler and more readable

obj_array.map(obj => _.omit(obj,["DATA_BB_TYP", "DATA_MAC"]))

回答2:

Here you go,

var obj_array = [{
        "DATA_ID": 1,
        "DATA_NAME": "Jim",
        "DATA_BB_TYP": 2,
        "DATA_MAC": "5474",
    },
    {
        "DATA_ID": 3,
        "DATA_NAME": "Fro",
        "DATA_BB_TYP": 33,
        "DATA_MAC": "8e30",
    },
    {
        "DATA_ID": 2,
        "DATA_NAME": "Jimb",
        "DATA_BB_TYP": 2,
        "DATA_MAC": "45e8",
    },
    {
        "DATA_ID": 4,
        "DATA_NAME": "Kht1",
        "DATA_BB_TYP": 35,
        "DATA_MAC": "58d0",
    },
    {
        "DATA_ID": 6,
        "DATA_NAME": "Sens",
        "DATA_BB_TYP": 34,
        "DATA_MAC": "d004",
    }
];

    var str_array_criteria = ["DATA_BB_TYP", "DATA_MAC"];

    var new_obj_array = obj_array.map(function(obj) {
      str_array_criteria.forEach(function(prop) {
        delete obj[prop];
      });
      
      return obj;
    });

    console.log(new_obj_array);