node.js - JavaScript Retain certain properties and remove other properties from array of objects -


i retain properties array of javascript objects. here array of objects.

obj_array = [{         "chr_id": 1,         "chr_name": "jim",         "chr_bb_typ": 2,         "chr_mac": "5474",     },     {         "chr_id": 3,         "chr_name": "fro",         "chr_bb_typ": 33,         "chr_mac": "8e30",     },     {         "chr_id": 2,         "chr_name": "jimb",         "chr_bb_typ": 2,         "chr_mac": "45e8",     },     {         "chr_id": 4,         "chr_name": "kht1",         "chr_bb_typ": 35,         "chr_mac": "58d0",     },     {         "chr_id": 6,         "chr_name": "sens",         "chr_bb_typ": 34,         "chr_mac": "d004",     } ]

i have string array specifies properties retain.

var str_array_criteria = ["chr_id", "chr_name"];

after removal, array of object this;

obj_array_removed = [{         "chr_id": 1,         "chr_name": "jim",             },     {         "chr_id": 3,         "chr_name": "fro",     },     {         "chr_id": 2,         "chr_name": "jimb",     },     {         "chr_id": 4,         "chr_name": "kht1",     },     {         "chr_id": 6,         "chr_name": "sens",     } ]

i using node.js v6.

here go object.keys,

var obj_array = [{          "chr_id": 1,          "chr_name": "jim",          "chr_bb_typ": 2,          "chr_mac": "5474",      },      {          "chr_id": 3,          "chr_name": "fro",          "chr_bb_typ": 33,          "chr_mac": "8e30",      },      {          "chr_id": 2,          "chr_name": "jimb",          "chr_bb_typ": 2,          "chr_mac": "45e8",      },      {          "chr_id": 4,          "chr_name": "kht1",          "chr_bb_typ": 35,          "chr_mac": "58d0",      },      {          "chr_id": 6,          "chr_name": "sens",          "chr_bb_typ": 34,          "chr_mac": "d004",      }  ];        var str_array_criteria = ["chr_id", "chr_name"];        obj_array.foreach(function(obj) {        object.keys(obj).foreach(function(key){          if(str_array_criteria.indexof(key) === -1) {              delete obj[key];            }        });      });        //var new_obj_array = obj_array.map(function(obj) {        //object.keys(obj).foreach(function(key){          //if(str_array_criteria.indexof(key) === -1) {              //delete obj[key];            //}        //});                //return obj;      //});        console.log(obj_array);


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