Pure Function vs Impure Function – Learn the Difference
An impure function is a function that contains one or more side effects. A pure function is a function without any side effects.
An impure function is a function that contains one or more side effects. A pure function is a function without any side effects.
Whenever you use reduce() on an array, the method uses its function argument to reduce its calling array's items to a single value.
The spread operator helps to expand iterables into individual elements. It is effective only when used within an array, function, or object.