大约有 27,000 项符合查询结果（耗时：0.0322秒） [XML]
Why do enum permissions often have 0, 1, 2, 4 values?
...ently (Also notice that the Delete bit is not set and therefore this value does not convey permission to delete).
It allows one to store multiple flags in a single field of bits.
share
|
improve ...
What is the difference between procedural programming and functional programming? [closed]
...amming styles. ( Perl 6 and D 2 )
Procedural:
The output of a routine does not always have a direct correlation with the input.
Everything is done in a specific order.
Execution of a routine may have side effects.
Tends to emphasize implementing solutions in a linear fashion.
Perl 6
sub fac...
Possible reason for NGINX 499 error codes
...s happens on my Angular APP if the user closes the tab and my API requests does not get completed.
– Vivek Saurabh
Jun 26 at 7:20
...
How do you test that a Python function throws an exception?
How does one write a unittest that fails only if a function doesn't throw an expected exception?
13 Answers
...
What's the -practical- difference between a Bare and non-Bare repository?
...ifference between a bare and non-bare repository is that a bare repository does not have a default remote origin repository:
~/Projects$ git clone --bare test bare
Initialized empty Git repository in /home/derek/Projects/bare/
~/Projects$ cd bare
~/Projects/bare$ git branch -a
* master
~/Projects/b...
Is the creation of Java class files deterministic?
...r options to avoid differences? Is a difference only possibly in theory or does Oracle's javac actually produce different class files for the same input and compiler options?
...
Apply function to all elements of collection through LINQ [duplicate]
...}
(Where ThrowIfNull is an extension method on any reference type, which does the obvious thing.)
It'll be interesting to see if this is part of .NET 4.0. It goes against the functional style of LINQ, but there's no doubt that a lot of people find it useful.
Once you've got that, you can write t...
Best practices for circular shift (rotate) operations in C++
...tate and shift instructions mask the shift-count the same way the C source does.
Compiler support for this UB-avoiding idiom on x86, for uint32_t x and unsigned int n for variable-count shifts:
clang: recognized for variable-count rotates since clang3.5, multiple shifts+or insns before that.
gcc:...
What is the difference between parseInt() and Number()?
...rrespond with any digit of the currently used base.
The Number constructor doesn't detect octals:
Number("010"); // 10
parseInt("010"); // 8, implicit octal
parseInt("010", 10); // 10, decimal radix used
But it can handle numbers in hexadecimal notation, just like parseInt:
Number("...
FFMPEG (libx264) “height not divisible by 2”
...
The answer to the original question which does not want to scale the video is:
-vf "pad=ceil(iw/2)*2:ceil(ih/2)*2"
Command:
ffmpeg -r 24 -i frame_%05d.jpg -vcodec libx264 -y -an video.mp4 -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2"
Basically, .h264 needs even dimension...