大约有 16,000 项符合查询结果（耗时：0.0216秒） [XML]
How do I check OS with a preprocessor directive?
...tform_name() {
return (PLATFORM_NAME == NULL) ? "" : PLATFORM_NAME;
}
int main(int argc, char *argv[]) {
puts(get_platform_name());
return 0;
}
Tested with GCC and clang on:
Debian 8
Windows (MinGW)
Windows (Cygwin)
...
Sound alarm when code finishes
....
On Linux and Mac
import os
duration = 1 # seconds
freq = 440 # Hz
os.system('play -nq -t alsa synth {} sine {}'.format(duration, freq))
In order to use this example, you must install sox.
On Debian / Ubuntu / Linux Mint, run this in your terminal:
sudo apt install sox
On Mac, run this in...
How to round up the result of integer division?
...
Converting to floating point and back seems like a huge waste of time at the CPU level.
Ian Nelson's solution:
int pageCount = (records + recordsPerPage - 1) / recordsPerPage;
Can be simplified to:
int pageCount = (recor...
ImportError: No module named PIL
...ommand is. The two should match well enough. Or, better: python -c 'import sys; print sys.path' will tell you where your python command looks for modules (print(sys.path), for Python 3).
– Eric O Lebigot
Oct 26 '17 at 8:34
...
Generating Random Passwords
...h];
for (int i = 0; i < length; i++)
{
ulong value = BitConverter.ToUInt64(bytes, i * 8);
result[i] = characterArray[value % (uint)characterArray.Length];
}
return new string(result);
}
(This is a copy of my answer to How can I generate random 8 character, alphan...
wget/curl large file from google drive
...content(response, destination)
if __name__ == "__main__":
import sys
if len(sys.argv) is not 3:
print("Usage: python google_drive.py drive_file_id destination_file_path")
else:
# TAKE ID FROM SHAREABLE LINK
file_id = sys.argv[1]
# DESTINATION FILE ON...
How do I convert between big-endian and little-endian values in C++?
How do I convert between big-endian and little-endian values in C++?
31 Answers
31
...
Why is enum class preferred over plain enum?
... enumerator names are local to the enum and their values do not implicitly convert to other types (like another enum or int)
Plain enums - where enumerator names are in the same scope as the enum and their
values implicitly convert to integers and other types
Example:
enum Color { red, green, blu...
Is Python strongly typed?
... In fact, when you overload + on a custom type, you can make it implicitly convert anything to a number:
def to_number(x):
"""Try to convert function argument to float-type object."""
try:
return float(x)
except (TypeError, ValueError):
return 0
class Foo:
def _...
Linux 进程卡住了怎么办？ - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...x26/0x30
[<ffffffff81220fc8>] vfs_fstatat+0x78/0xc0
[<ffffffff8122150e>] SYSC_newstat+0x2e/0x60
[<ffffffff8122169e>] SyS_newstat+0xe/0x10
[<ffffffff8186281b>] entry_SYSCALL_64_fastpath+0x22/0xcb
[<ffffffffffffffff>] 0xffffffffffffffff
这时候按 Ctrl+C 也不能退出。
root@localhost:...