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Windows batch: formatted date into variable
... /f "skip=1" %%x in ('wmic os get localdatetime') do if not defined MyDate set MyDate=%%x
Then you can extract the individual parts using substrings:
set today=%MyDate:~0,4%-%MyDate:~4,2%-%MyDate:~6,2%
Another way, where you get variables that contain the individual parts, would be:
for /f %%x...
How to send a command to all panes in tmux?
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Have you tried following in tmux window with multiple panes
Ctrl-B :
setw synchronize-panes on
clear history
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How can I time a code segment for testing performance with Pythons timeit?
... you already do in you example code and timeit does automatically when you set its number argument)
import time
def myfast():
code
n = 10000
t0 = time.time()
for i in range(n): myfast()
t1 = time.time()
total_n = t1-t0
In Windows, as Corey stated in the comment, time.clock() has much higher...
How can I link to a specific glibc version?
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Setup 1: compile your own glibc without dedicated GCC and use it
Since it seems impossible to do just with symbol versioning hacks, let's go one step further and compile glibc ourselves.
This setup might work and is quick a...
IntelliJ shortcut to show a popup of methods in a class that can be searched
I'm switching over from Eclipse to IntelliJ. In Eclipse, if you do Ctrl + O in the editor, it will show a hover popup that allows you to search for a method in the class you're editing.
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Linux C/C++进程单实例互斥代码分享 - C/C++ - 清泛网 - 专注C/C++及内核技术
..._type = F_WRLCK; // 写文件锁定
fl.l_start = 0;
fl.l_whence = SEEK_SET;
fl.l_len = 0;
int ret = fcntl(fd, F_SETLK, &fl);
if (ret < 0) {
if (errno == EACCES || errno == EAGAIN) {
printf("%s already locked, error: %s\n", kPidFileName, strerror(errno));
close(fd);
exit(1);
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More elegant way of declaring multiple variables at the same time
...t may make sense to use a dictionary instead. For example, if you want to set up Boolean preset values for a set of one-letter flags, you could do this:
>>> flags = dict.fromkeys(["a", "b", "c"], True)
>>> flags.update(dict.fromkeys(["d", "e"], False))
>>> print flags
{'...
C++ static virtual members?
Is it possible in C++ to have a member function that is both static and virtual ? Apparently, there isn't a straightforward way to do it ( static virtual member(); is a compile error), but is there at least a way to achieve the same effect?
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How to find encoding of a file via script on Linux?
... MIME-type information for the file, which will also include the character-set encoding. I found a man-page for it, too :)
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c语言编程中%g是什么格式？ - C/C++ - 清泛网 - 专注C/C++及内核技术
...什么格式？%g用来输出实数，它根据数值的大小，自动选f格式或e格式（选择输出时占宽度较小的一种），且不输出无意义的0。即%g是根据结果自动选择科学...%g用来输出实数，它根据数值的大小，自动选f格式或e格式（选择输出...