I have an object with the following format
var obj = [{
"a": 1
}, {
"b": 2
}, {
"c": 3
}];
Would want to fetch only keys out of each object inside this array of objects into a new array
Something like this:
["a","b","c"]
Have tried the following but it is not working :
var obj = [{
"a": 1
}, {
"b": 2
}, {
"c": 3
}];
let result = obj.map (({ val }) => val)
console.log(result);Merge to a single object by spreading into Object.assign(), and then get the keys:
var obj = [{"a":1},{"b":2},{"c":3}];
const result = Object.keys(Object.assign({}, ...obj));
console.log(result);Or use Array.flatMap() with Object.keys():
var obj = [{"a":1},{"b":2},{"c":3}];
const result = obj.flatMap(Object.keys);
console.log(result);
Object.assign method will return unique keys while the flatMap method will return all the keys per object regardless of any duplicates.
I'd .map and extract the first item in the Object.keys of the object being iterated over:
var obj = [{
"a": 1
}, {
"b": 2
}, {
"c": 3
}];
const result = obj.map(inner => Object.keys(inner)[0]);
console.log(result);
You can make use of Object.assign and spread(...) operator to solve this issue
var mainObj = [{"a":1},{"b":2},{"c":3},{"23":1},{"32b":2},{"232c":3}];
const allKeys = Object.keys(Object.assign({}, ...mainObj));
console.log(allKeys);You can simply use .map() to open the array and then use Object.keys to return the key from the object. Please refer the example I have made.I hope it helps
https://www.w3schools.com/code/tryit.asp?filename=G66AEBM9ZJCD
let object1 = [{a:1,b:2,c:3}]
let final = object1.map(function(object){
return Object.keys(object)
});
