Difference Between a Set and an Array
Sets and arrays in JavaScript are both data structures, but they have distinct characteristics and use cases.
Here are some key differences between Sets and Arrays:
Differences |
Sets |
Arrays |
---|---|---|
Uniqueness of Values |
A Set in JavaScript can only contain unique values. If you attempt to add a value that is already present in the Set, it won’t result in duplicates. |
An array can contain duplicate values. Each element in an array is identified by its index, and there’s no automatic enforcement of uniqueness. |
Methods and Properties |
Sets have methods like |
Arrays have a variety of methods such as |
Ordering |
The order of elements in a Set is based on the order of insertion, but it doesn’t guarantee any specific order when iterating through the elements. |
The order of elements in an array is well-defined and maintained. Arrays are indexed, and the order remains constant. |