How can i remove key's from json doc array in nodeJS - json

Question

Is there a quick and stable way to remove all a key value pair from a json Doc array. In my case i have data returned from my DB which contains more fields then i want to show to user so i want to query my db and see what key's he is supposed to get before returning the json to client.
In this sample the data has 3 keys, FirstName,LastName and dob how would i go to remove all dob Key and values from the json, also if i have to remove more then one Key Value pair does it make difference when you do it ?
{
"result":[
{
"FirstName": "Test1",
"LastName": "User",
"dob": "01/01/2011"
},
{
"FirstName": "user",
"LastName": "user",
"dob": "01/01/2017"
},
{
"FirstName": "Ropbert",
"LastName": "Jones",
"dob": "01/01/2001"
},
{
"FirstName": "hitesh",
"LastName": "prajapti",
"dob": "01/01/2010"
}
]
}

Answer 1

You can use the delete operator on the obj while looping through your data.
let data = {
"result": [{
"FirstName": "Test1",
"LastName": "User",
"dob": "01/01/2011"
},
{
"FirstName": "user",
"LastName": "user",
"dob": "01/01/2017"
},
{
"FirstName": "Ropbert",
"LastName": "Jones",
"dob": "01/01/2001"
},
{
"FirstName": "hitesh",
"LastName": "prajapti",
"dob": "01/01/2010"
}
]
}
// #param keys: an array of keys to remove
function removeKeyValue(obj, keys) {
obj.forEach(currObj => {
keys.forEach(key => {
delete currObj[key];
});
});
}
removeKeyValue(data.result, ["dob", "LastName"]);
console.log(data.result);