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Why main does not return 0 here?
...return value from a function is normally stored in the eax register of the cpu, so the statement "return 4;" would usually compile to
mov eax, 4;
ret;
and return x (depending on your compiler) would be something like:
mov eax, [ebp + 4];
ret;
if you don't specify a return value then the compil...
List directory in Go
...ter implementations use more memory. It's also possible that the number of CPU cores on the tester's computer hurts/helps the concurrent filepath.Walk. Furthermore, filepath.Walk supports recursive decent while os.File.Readdir and ioutil.ReadDir do not.
– Xeoncross
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OnNotify函数 ON_NOTIFY消息总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...个窗口发的(当然可以用参数进行约定)。
如何解决这个问题？
有几种思路：1.重写ON_MESSAGE宏，增加ID的限制；2.模拟按钮单击消息；3.自定义WM_NOTIFY消息。基于这些思路都不能修改MFC底层的代码。
用调试的方式查看MFC的实现代...
Locate the nginx.conf file my nginx is actually using
...d show you the current loaded nginx config file.
$ ps aux
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 11 0.0 0.2 31720 2212 ? Ss Jul23 0:00 nginx: master process nginx -c /app/nginx.conf
So that you could actually get the config file by for ...
When should I choose Vector in Scala?
...sically exist together on RAM in groups of 32, which more fully fit in the CPU cache... so there's less cache miss
– richizy
Aug 9 '16 at 1:25
add a comment
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setImmediate vs. nextTick
...n completes.
So in a case where you're trying to break up a long running, CPU-bound job using recursion, you would now want to use setImmediate rather than process.nextTick to queue the next iteration as otherwise any I/O event callbacks wouldn't get the chance to run between iterations.
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Scalar vs. primitive data type - are they the same thing?
...ar processor' in contrast to a 'vector processor'. A scalar processor is a CPU that can only handle one piece of data at a time. These processors were/are named after the arithmetic terms. Interestingly enough, when you look up 'scalar' on wikipedia, you get redirected to 'variable'.
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Macro vs Function in C
...hurt performance due to code bloat, which reduces the effectiveness of the CPU instruction cache. We can make fast generic data structures in C without using these techniques.
– Sam Watkins
Jun 26 '15 at 3:24
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Alarm Manager Example
...
This is working code. It wakes CPU every 10 minutes until the phone turns off.
Add to Manifest.xml:
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<uses-permission android:name="android.permission.WAKE_LOCK"></uses-permission>
...
<receiver android:process=":remote" android:name="....
JS Client-Side Exif Orientation: Rotate and Mirror JPEG Images
...) > -1, because it's faster and less resource intensive (both RAM & CPU). There's no need to have an array there. This is important when batching lots of images, where every bit count. Otherwise, pretty good answer. Upvoted!
– Ryan Casas
Aug 14 '17 at 8:...