You signed in with another tab or window. Reload to refresh your session.You signed out in another tab or window. Reload to refresh your session.You switched accounts on another tab or window. Reload to refresh your session.Dismiss alert
Array.forEach() is not invoked for index properties that have been deleted or are uninitialized
Similarly, In Array.map() callback is invoked only for indexes of the array which have assigned values (including undefined). It is not called for missing elements of the array. But output arrays does contain the holes.
The for...of statement creates a loop iterating over iterable objects like an Array. For a sparse array, the holes are treated as undefined
The Spread Operator (...) follows a similar behavior and expands an array such that holes are undefined