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   1 /**
   2  * @fileoverview Disallow sparse arrays
   3  * @author Nicholas C. Zakas
   4  */
   5 "use strict";
   6
   7 //------------------------------------------------------------------------------
   8 // Rule Definition
   9 //------------------------------------------------------------------------------
  10
  11 module.exports = function(context) {
  12
  13
  14     //--------------------------------------------------------------------------
  15     // Public
  16     //--------------------------------------------------------------------------
  17
  18     return {
  19
  20         "ArrayExpression": function(node) {
  21
  22             var emptySpot = node.elements.indexOf(null) > -1;
  23
  24             if (emptySpot) {
  25                 context.report(node, "Unexpected comma in middle of array.");
  26             }
  27         }
  28
  29     };
  30
  31 };