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java get file size efficiently
					...m access is one of the major responsibilities of an OS. faqs.org/docs/linux_admin/buffer-cache.html To get good benchmarking results, the cache should be cleared before each run.
                
– z0r
                Jul 6 '12 at 0:16
                        
                            
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							How update the _id of one MongoDB Document?
					I want update an  _id  field of one document. I know it's not a really good pratice. But with some technical reason, I need update it. If I try to update it I get:
                    
                    
                        
                            
                                
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							How do I test an AngularJS service with Jasmine?
					...hat passed
    // for logging? Let's make it String-readable...
  function _parseStuffIntoMessage(stuff) {
    var message = "";
    if (typeof stuff !== "string") {
      message = JSON.stringify(stuff)
    } else {
      message = stuff;
    }
    return message;
  }
  /**
   * @summary
   * Wri...				
				
				
							Convert any object to a byte[]
					...t form: [Serializable]     class GameConfiguration     {         public map_options_t enumMapIndex;         public Int32 iPlayerAmount;         private Int32 iGameID;     }               byte[] baPacket;             GameConfiguration objGameConfClient = new GameConfiguration();   baPacket = BinModle...				
				
				
							Why do people use __(double underscore) so much in C++
					...mming in C++, Rules and Recommendations :
  The use of two underscores (`__') in identifiers is reserved for the compiler's internal use according to the ANSI-C standard.
  
  Underscores (`_') are often used in names of library functions (such as "_main" and "_exit"). In order to avoid collisions...				
				
				
							What would a “frozen dict” be?
					...ict(collections.Mapping):
    """Don't forget the docstrings!!"""
    def __init__(self, *args, **kwargs):
        self._d = dict(*args, **kwargs)
        self._hash = None
    def __iter__(self):
        return iter(self._d)
    def __len__(self):
        return len(self._d)
    def __getitem__...				
				
				
							How to darken a background using CSS?
					... image */
        url(http://fc02.deviantart.net/fs71/i/2011/274/6/f/ocean__sky__stars__and_you_by_muddymelly-d4bg1ub.png);
    }
Reference: linear-gradient() - CSS | MDN
UPDATE: Not all browsers support RGBa, so you should have a 'fallback color'. This color will be most likely be solid (...				
				
				
							import module from string variable
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The __import__ function can be a bit hard to understand.
If you change 
i = __import__('matplotlib.text')
to
i = __import__('matplotlib.text', fromlist=[''])
then i will refer to matplotlib.text.
In Python 2.7 and Python ...				
				
				
							What does [:] mean?
					...ctly create slice() objects.  If you need them anyway, NumPy provides the s_ helper as an alternative way to create them.
                
– Sven Marnach
                Apr 7 '14 at 10:20
                        
                            
                        
            
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							How to make my custom type to work with “range-based for loops”?
					...C++ standard, is specified to expand to something equivalent to:
for( range_declaration : range_expression )
becomes:
{
  auto && __range = range_expression ;
  for (auto __begin = begin_expr,
            __end = end_expr;
            __begin != __end; ++__begin) {
    range_declaration = *...				
				
				
							