appendix: Bad Parts
  ==================
  '' == '0'          // false
  0 == ''            // true
  0 == '0'           // true
  
  false == 'false'   // false
  false == '0'       // true
  
  false == undefined // false
  false == null      // false
  null == undefined  // true
  
  ' \t\r\n ' == 0    // true
      
      
  ====================================
  with (obj) {
      a = b;
  }
      
      
  ====================================
  if (obj.a === undefined) {
      a = obj.b === undefined ? b : obj.b;
  } else {
      obj.a = obj.b === undefined ? b : obj.b;
  }
      
      
  ====================================
  a = b;
  a = obj.b;
  obj.a = b;
  obj.a = obj.b;
      
      
  ====================================
  eval("myValue = myObject." + myKey + ";");
      
      
  ====================================
  myvalue = myObject[myKey];
      
      
  ====================================
  if (ok)
      t = true;
      
      
  ====================================
  if (ok)
      t = true;
      advance(  );
      
      
  ====================================
  if (ok) {
      t = true;
      advance(  );
  }
      
      
  ====================================
  if (ok) {
      t = true;
  }
  advance(  );
      
      
  ====================================
  for (p = src, q = dest; !*p; p++, q++) *q = *p;
      
      
  ====================================
  &    and
  |    or
  ^    xor
  ˜    not
  >>   signed right shift
  >>>  unsigned right shift
  <<   left shift
      
      
  ====================================
  function foo(  ) {}
      
      
  ====================================
  var foo = function foo(  ) {};
      
      
  ====================================
  (function (  ) {
      var hidden_variable;
  
      // This function can have some impact on
      // the environment, but introduces no new
      // global variables.
  }());
      
      
  ====================================
  new Boolean(false)
      
      
  ==================