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Is it safe to use -1 to set all bits to true?
...e:
unsigned long a = ~0u;
It won't necessarily store a pattern with all bits 1 into a. But it will first create a pattern with all bits 1 in an unsigned int, and then assign it to a. What happens when unsigned long has more bits is that not all of those are 1.
And consider this one, which will f...
How to add column if not exists on PostgreSQL?
...
This approach (EXCEPTION) is a bit more general, and can be employed for tasks which have no IF NOT EXISTS syntax - for example ALTER TABLE ... ADD CONSTRAINT.
– Tomasz Gandor
Apr 16 '19 at 9:51
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Creating temporary files in bash
...predictable and the race condition it creates is
easy for an attacker to win. A safer, though still inferior, approach
is to make a temporary directory using the same naming scheme. While
this does allow one to guarantee that a temporary file will not be
subverted, it still allows a simple ...
convert_tz returns null
... then on.
– Barmar
Aug 13 '13 at 17:10
2
You can use the force flag to override any errors you ru...
C# getting the path of %AppData%
...% C:\Program Files
%PROGRAMFILES(X86)% C:\Program Files (x86) (only in 64-bit version)
%PUBLIC% C:\Users\Public
%SystemDrive% C:
%SystemRoot% C:\Windows
%TEMP% and %TMP% C:\Users\Username\AppData\Local\Temp
%USERPROFILE% C:\Users\Username
%WINDIR% C:\Windows
...
What is the { get; set; } syntax in C#?
... Josie ThompsonJosie Thompson
4,66711 gold badge1010 silver badges2121 bronze badges
19
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Unable to type in Visual Studio
... once I go back into the problem project I am unable to type in the editor windows. Not sure if it matters but the project that is giving me issues we are using SVN on. The other projects are just local ones on the machine. I have restarted Visual Stuido, restarted the computer and still am unabl...
How can I profile Python code line-by-line?
...:
151 50000 82003 1.6 13.5 IntLoc = IntParIO + 10
152 50000 63162 1.3 10.4 while 1:
153 50000 69065 1.4 11.4 if Char1Glob == 'A':
154 50000 66354 1.3 10.9 IntLoc = IntLoc - 1
...
How to use HTML Agility pack
...
DaveShaw
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answered May 11 '09 at 7:19
AshAsh
56...