testNewArrayCount.js

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function testNewArrayCount()

  function count(a) { var n = 0; for (var p in a) n++; return n; }

  var a = [];

  for (var i = 0; i < 5; i++)

    a = [0];

  assertEq(count(a), 1);

  for (var i = 0; i < 5; i++)

    a = [0, , 2];

  assertEq(count(a), 2);

testNewArrayCount();