Is there way to calculate the total amount of empty attributes within a nested Object?
[{
"name": test,
"id" : "",
"rating": {
"title": "",
"type": "book",
"star": 2
}
}]
I've tried Object.keys(data).length but obviously this doesn't give me back the nested ones.
Any suggestions would be helpful.
You can create a recursive function with Array.reduce() to iterate all values, and if a value is an object (or array) as well, call the function on the nested object:
const isNonNullObject = obj => typeof obj === 'object' && obj !== null
const countEmpty = obj =>
Object.values(obj)
.reduce((acc, v) => {
if(v === '') return acc + 1
if(isNonNullObject(v)) return acc + countEmpty(v)
return acc
}, 0)
const arr = [{"name":"test","id":"","rating":{"title":"","type":"book","star":2}}]
const result = countEmpty(arr)
console.log(result)Use a recursive reduce:
let data = [{"name": "test","id" : "","rating": {"title": "","type": "book","star": 2}}];
let count = data.reduce(function recur(sum, obj) {
return sum + (obj === ""
|| Object(obj) === obj
&& Object.values(obj).reduce(recur, 0));
}, 0);
console.log(count);