JavaScript根据属性值过滤对象数组

问题描述

您可以尝试以下方法1和2：

方法1 ：（使用filter）

注意：这将返回一个新数组，并且不会修改原始数组。

var obj_array = [{

            "DATA_ID": 1,

            "DATA_NAME": "Dim",

            "DATA_BB_TYP": 2,

            "DATA_MAC": "5474",

        },

        {

            "DATA_ID": 3,

            "DATA_NAME": "Spre",

            "DATA_BB_TYP": 33,

            "DATA_MAC": "8e30",

        },

        {

            "DATA_ID": 2,

            "DATA_NAME": "Dimb",

            "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 retained = [2, 34];



    var new_obj_array = obj_array.filter(function(obj) {

      if(retained.indexOf(obj.DATA_BB_TYP) === -1) {

        return false;

      }



      return true;

    });



    console.log(new_obj_array);

方法2 ：（基本版本，如果您打算在浏览器中使用此版本，因为filter旧版本的浏览器将不支持该版本）

var obj_array = [{

        "DATA_ID": 1,

        "DATA_NAME": "Dim",

        "DATA_BB_TYP": 2,

        "DATA_MAC": "5474",

    },

    {

        "DATA_ID": 3,

        "DATA_NAME": "Spre",

        "DATA_BB_TYP": 33,

        "DATA_MAC": "8e30",

    },

    {

        "DATA_ID": 2,

        "DATA_NAME": "Dimb",

        "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 retained = [2, 34];



for(var i = obj_array.length - 1; i >= 0; i--) {

  var obj = obj_array[i];

  if(retained.indexOf(obj.DATA_BB_TYP) === -1) {

    obj_array.splice(i, 1);

  }

}



console.log(obj_array);

解决方法

我在javascript中有一组对象。内容看起来像这样；

obj_array = [{
        "DATA_ID": 1,"DATA_NAME": "Dim","DATA_BB_TYP": 2,"DATA_MAC": "5474",},{
        "DATA_ID": 3,"DATA_NAME": "Spre","DATA_BB_TYP": 33,"DATA_MAC": "8e30",{
        "DATA_ID": 2,"DATA_NAME": "Dimb","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",}
]

我想保留一些对象并删除其余的对象。如果object属性DATA_BB_TYP为2或34，则将保留对象。其他对象被删除。obj_array遗嘱的结果看起来像这样；

obj_array_retained = 
[{
        "DATA_ID": 1,}
]

我正在使用node.js v6.91。

编辑：有人建议我使用过滤器来解决这种问题。欢迎使用过滤器技术的答案。