JSON replace all empty values with a default string

Question

JSON has many empty values, where I want to replace the empty value with a default string.

var json= [
{
    "machineNum": "1A",
    "serialNo": "123",
    "city": ""
},
{
    "machineNum": "2B",
    "serialNo": "",
    "city": ""
},
{
    "machineNum": "3A",
    "serialNo": "123",
    "city": "NewCity"
}
]

 var newJson=json.replace("","Not AVailable");
 console.log(newJson);

So wherever there is "" - empty value replace with default value "Not Available"

The above is not working.

JSFIDDLE here

Answer 1

You need to do a replace on the json string not a javascript object. Also you aren't looking for "" you are looking for "\"\"":

var json= [
{
    "machineNum": "1A",
    "serialNo": "123",
    "city": ""
},
{
    "machineNum": "2B",
    "serialNo": "",
    "city": ""
},
{
    "machineNum": "3A",
    "serialNo": "123",
    "city": "NewCity"
}
]
var temp = JSON.stringify(json);
temp = temp.replace(/\"\"/g, "\"Not Available\"");
json = JSON.parse(temp);
console.log(json);

Console Output: