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_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", } ]
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；
DATA_BB_TYP
obj_array
obj_array_retained = [{ "DATA_ID": 1, "DATA_NAME": "Dim", "DATA_BB_TYP": 2, "DATA_MAC": "5474", }, { "DATA_ID": 2, "DATA_NAME": "Dimb", "DATA_BB_TYP": 2, "DATA_MAC": "45e8", }, { "DATA_ID": 6, "DATA_NAME": "Sens", "DATA_BB_TYP": 34, "DATA_MAC": "d004", } ]
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。
您可以尝试以下方法1和2：
方法1 ：（使用filter）
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);
