I am trying to validate the request object to check if specific keys exist in the object or not. I've tried lodash's has() function, but it seems that _.has() checks nested JSON. JavaScript's .hasOwnProperty() takes one key at a time. Is it possible to check an array of keys within a plain JSON object?
The object I am trying to check is:
{
"name": "[email protected]",
"oldPassword": "1234",
"newPassword": "12345"
}
Simply use Object.keys and every
const neededKeys = ['oldPassword', 'name', 'newPassword'];
const obj = {
"name": "[email protected]",
"oldPassword": "1234",
"newPassword": "12345"
}
console.log(neededKeys.every(key => Object.keys(obj).includes(key)));
Object.keys(obj).every(key => neededKeys.includes(key)); be more efficient? I imagine Object.keys would require an iteration over the object each time. So if you're only doing it once, instead of n times would it be better this way?
Object.keys(obj)s value and check with thatYou can use in operator to check if keys exist in object or not. It is quite faster than Object.keys as its complexity is O(1) as compared to Object.keys with complexity of O(n)
Example:
const neededKeys = ['oldPassword', 'name', 'newPassword'];
const obj = {
"name": "[email protected]",
"oldPassword": "1234",
"newPassword": "12345"
}
console.log(neededKeys.every(key => key in obj));
You can use .includes method of an array and Object.keys will give you an array of all the keys. You can compare this with an array of keys from which you want to check using a loop
var a = {
"name": "[email protected]",
"oldPassword": "1234",
"newPassword": "12345"
};
var key = ["name", "oldPassword", "newPassword"];
Object.keys(a).forEach(e => key.includes(e) ? console.log(e + " found") : console.log(e + " not found"))
myobj = {
"name": "[email protected]",
"oldPassword": "1234",
"newPassword": "12345"
}
Print (myobj.keys() >= {"name","oldPassword","newPassword"})
-- this will return True
Print (myobj.keys() >= {"name1","id","firstname"})
-- this will return false
obj.name && obj.oldPassword && obj.newPassword? If you want to check for a fixed structure, you need to have some sort of types like Typscript provides for example.