Description

Deleting an array element can lead to unexpected (for some) behaviour since it leaves 'length' unchanged. Some might say that using delete on array elements should best be avoided and there are alternatives - splice() seems to be preferred.

Having a rule to prevent delete being used on arrays would be beneficial.

Fail

> var myArray = [ 1, 2, 3 ];
undefined
> delete myArray[1];
true
> myArray
(3) [1, empty, 3]
> myArray[1]
undefined
> myArray.length
3

Pass

> var myArray = [ 1, 2, 3 ];
(3) [1, 2, 3]
> myArray.splice(1,1)
[2]
> myArray
(2) [1, 3]