The Daily WTF: Curious Perversions in Information Technology

Delfi · 2006-02-02 Reply Admin

Alex Papadimoulis:

SQWORD GetGlobalTime( const TCHAR* Filename )
  {
    //return greenwich mean time as expressed in nanoseconds since the
    //creation of the universe.  time is expressed in meters, so
    //divide by the speed of light to obtain seconds.  assumes the
    //speed of light in a vacuum is constant.  the file specified by
    //Filename is assumed to be in your reference frame, otherwise you
    //must transform the result by the path integral of the minkowski
    //metric tensor in order to obtain the correct result.

    return Time;
  }

this code comes from the unreal tournament source code.

2006-02-03 Reply Admin

Delfi:

this code comes from the unreal tournament source code.

[image]

2006-02-08 Reply Admin

Alex Papadimoulis:
Now I'm scared. This morning I wrote:
# Is this necessary?
# probably not but what the hell
# Better safe than sory
$script = 0 unless ($script);

This can be perfectly valid.

Would be perfectly valid if:

$script = 0 unless (defined($script));

or

$script||=0; #(to some extent)

2008-09-05 Reply Admin

Wait, Self-Documenting or self-deprecating?

2009-08-11 Reply Admin

void sysDraw::close()
{
  // Is this necessary????
  // probably not but what the hell.
  // better safe than sorry
  if (!this) return;                 
  
  // ... snip ...
}

you can actually executed that return by:

sysDraw* h = NULL:
h->close()

that will actually compile and run....

2010-06-19 Reply Admin

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2010-08-09 Reply Admin

Regarding the "if(!this)"... yes, it can happen in C++. If the function is not virtual, it will just be called, even if the object is a null pointer.

Probably would be better to figure it out another way, but... If the developer has inherited a messy/buggy system, where sometimes close() gets called on a null pointer, that is a perfectly reasonable solution.

TheCPUWizard · 2011-03-09 Reply Admin

AAAAGH!

You dont need any of that fancy stuff...

T *p = NULL; p->func();

This WILL properly call the member function [it will only be "broken" if func is virtual), so checking (this!=null) is actually valid

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