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Edit File: arguments-enum.js

// Copyright 2008 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
//       copyright notice, this list of conditions and the following
//       disclaimer in the documentation and/or other materials provided
//       with the distribution.
//     * Neither the name of Google Inc. nor the names of its
//       contributors may be used to endorse or promote products derived
//       from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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function countArguments() {
  var count = 0;
  for (var prop in arguments)
    count++;
  return count;
}

function setArgumentCount() {
  arguments[10] = 5;
  arguments.x = 4;
  var count = 0;
  for (var prop in arguments)
    count++;
  return count;
}

assertEquals(0, countArguments());
assertEquals(1, countArguments(1));
assertEquals(2, countArguments(1, 2));
assertEquals(5, countArguments(1, 2, 3, 4, 5));

assertEquals(2, setArgumentCount());
assertEquals(3, setArgumentCount(1));
assertEquals(4, setArgumentCount(1, 2));
assertEquals(7, setArgumentCount(1, 2, 3, 4, 5));

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