js array fill map

1let filledArray = new Array(10)
2    .fill(null)
3    .map(()=> ({'hello':'goodbye'}))
4
5// In this approach, we are creating an array with ten empty slots, 
6// then filling those slots with the null value, 
7// then creating a new array with unique objects. 
8// Now when we change an object in the array, 
9// we are only changing a specific object, not a reference to an object.

1let filledArray = new Array(10).fill({'hello':'goodbye'});