List.hasIndex
hasIndex($index) -> boolean
Description
Return true if the List contains a value at the given $index.
If $index is negative, it counts from the end of the list (the last item is at -1).
['a', 'b', 'c'].hasIndex(1) //= true ['a', 'b', 'c'].hasIndex(-1) //= true ['a', 'b', 'c'].hasIndex(100) //= false [].hasIndex(0) //= false