大约有 19,000 项符合查询结果（耗时：0.0365秒） [XML]
How to prevent form resubmission when page is refreshed (F5 / CTRL+R)
... It seems to me that if you redirect to the same page, then $_POST is cleared. As I understand it, that was the desired effect. That was MY desired effect, anyway. I think the answer would be better if it made that explicit, though.
– donutguy640
...
Locking a file in Python
...file locking (Linux, Ubuntu, MacOS, etc.)
import fcntl, os
def lock_file(f):
fcntl.lockf(f, fcntl.LOCK_EX)
def unlock_file(f):
fcntl.lockf(f, fcntl.LOCK_UN)
except ModuleNotFoundError:
# Windows file locking
import msvcrt, os
def file_size(f):
return o...
How to get Linux console window width in Python
...
rows, columns = subprocess.check_output(['stty', 'size']).split() is a little shorter, plus subprocess is the future
– cdosborn
Mar 17 '15 at 2:00
...
How to drop column with constraint?
...'alter table tbloffers drop constraint ['+dc.NAME+N']'
from sys.default_constraints dc
JOIN sys.columns c
ON c.default_object_id = dc.object_id
WHERE
dc.parent_object_id = OBJECT_ID('tbloffers')
AND c.name = N'checkin'
IF @@ROWCOUNT = 0 BREAK
EXEC (@sql)
END
...
Minimizing NExpectation for a custom distribution in Mathematica
.... Let's extract it from your definition above into simple functions:
pdf[a_, b_, m_, s_, x_] := (1/(2*(a + b)))*a*b*
(E^(a*(m + (a*s^2)/2 - x))*Erfc[(m + a*s^2 - x)/(Sqrt[2]*s)] +
E^(b*(-m + (b*s^2)/2 + x))*Erfc[(-m + b*s^2 + x)/(Sqrt[2]*s)])
pdf2[a_, b_, m_, s_, x_] := pdf[a, b, m, s, Log...
How to include external Python code to use in other files?
...
You may interesting imp module and magic call __import__.
– Vitold S.
Dec 5 '15 at 23:53
...
How to run a program without an operating system?
...125\252' > main.img
sudo apt-get install qemu-system-x86
qemu-system-x86_64 -hda main.img
Outcome:
Note that even without doing anything, a few characters are already printed on the screen. Those are printed by the firmware, and serve to identify the system.
And on the T430 we just get a blank ...
undefined reference to `__android_log_print'
...
Try the following in your Android.mk file:
LOCAL_LDLIBS := -L$(SYSROOT)/usr/lib -llog
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How can I save a screenshot directly to a file in Windows? [closed]
... }
}
public static Bitmap GetDesktopImage()
{
WIN32_API.SIZE size;
IntPtr hDC = WIN32_API.GetDC(WIN32_API.GetDesktopWindow());
IntPtr hMemDC = WIN32_API.CreateCompatibleDC(hDC);
size.cx = WIN32_API.GetSystemMetrics(WIN32_API.SM_CXSCREEN);
s...
(this == null) in C#!
... {
base..ctor(new Func<string>(Program.Derived.<.ctor>b__0));
return;
}
[CompilerGenerated]
private static string <.ctor>b__0()
{
string CS$1$0000;
CS$1$0000 = CS$1$0000.CheckNull();
Label_0009:
return CS$1$0000;
}
...