javascript - 如何用数组对象中的空字符串替换未定义的值？

数组对象：

 var jsonList= {
        "list": [{
            "COLUMN_NAME": "control_master_id",
            "REFERENCED_COLUMN_NAME": "control_master_id",
            "REFERENCED_TABLE_NAME": "tbi_controls_master",
            "TABLE_NAME": "tbi_widget_controls"
        }, {
            "COLUMN_NAME": "authorization_id",
            "REFERENCED_COLUMN_NAME": "authorization_id",
            "REFERENCED_TABLE_NAME": "tbi_authorization_master",
            "TABLE_NAME": "tbi_controls_master"
        }, {
            "COLUMN_NAME": undefined,
            "REFERENCED_COLUMN_NAME": undefined,
            "REFERENCED_TABLE_NAME": undefined,
            "TABLE_NAME": "tbi_widget_controls "
        }]
    }

预期解决方案：

var jsonList={
    "list": [{
        "COLUMN_NAME": "control_master_id",
        "REFERENCED_COLUMN_NAME": "control_master_id",
        "REFERENCED_TABLE_NAME": "tbi_controls_master",
        "TABLE_NAME": "tbi_widget_controls"
    }, {
        "COLUMN_NAME": "authorization_id",
        "REFERENCED_COLUMN_NAME": "authorization_id",
        "REFERENCED_TABLE_NAME": "tbi_authorization_master",
        "TABLE_NAME": "tbi_controls_master"
    }, {
        "COLUMN_NAME": "",
        "REFERENCED_COLUMN_NAME": "",
        "REFERENCED_TABLE_NAME": "",
        "TABLE_NAME": "tbi_widget_controls "
    }]
}

使用underscore.js有什么解决方案吗？优雅的解决方案？

最佳答案

你可以用这个

var updatedList = JSON.stringify(jsonList.list, function (key, value) {return (value === undefined) ? "" : value});

Demo Link Here