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noSparseArray

Disallow sparse arrays

Examples

Invalid

[1,,2]
warning[noSparseArray]: This array contains an empty slot.
   noSparseArray.js:1:1
  
1  [1,,2]
   ------

Suggested fix: Replace hole with undefined
    | @@ -1 +1 @@
0   | - [1,,2]
  0 | + [1, undefined,2]