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How to get process ID of background process?
... number of background process as seen from jobs):
$ echo $$
3748
$ sleep 100 &
[1] 192
$ echo $!
192
$ kill %1
[1]+ Terminated sleep 100
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What are the differences between type() and isinstance()?
...
+100
To summarize the contents of other (already good!) answers, isinstance caters for inheritance (an instance of a derived class is an ...
Throw keyword in function's signature
... :
};
size_t MethodThatCannotThrow() throw()
{
return 100;
};
void ExampleMethod()
{
size_t foo, bar;
try
{
foo = CalculateFoo();
bar = foo * 100;
MethodThatCannotThrow();
printf("bar is %d", bar...
How to round a number to n decimal places in Java
...
Assuming value is a double, you can do:
(double)Math.round(value * 100000d) / 100000d
That's for 5 digits precision. The number of zeros indicate the number of decimals.
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How to put an image in div with CSS?
...p;</div>
and put this into your css file:
div.picture1 {
width:100px; /*width of your image*/
height:100px; /*height of your image*/
background-image:url('yourimage.file');
margin:0; /* If you want no margin */
padding:0; /*if your want to padding */
}
otherwise, just use t...
SCOPE_IDENTITY() for GUIDs?
...
CREATE TABLE TestTable(KEY uniqueidentifier, ID VARCHAR(100), Name VARCHAR(100), Value tinyint);
Declare @id uniqueidentifier ;
DECLARE @TmpTable TABLE (KEY uniqueidentifier);
INSERT INTO [dbo].[TestTable]
([ID], [Name], Value])
OUTPUT INSERTED.KEY INTO @...
Hidden features of Python [closed]
...gt;>> 10 < x < 20
False
>>> x < 10 < x*10 < 100
True
>>> 10 > x <= 9
True
>>> 5 == x > 4
True
In case you're thinking it's doing 1 < x, which comes out as True, and then comparing True < 10, which is also True, then no, that's really ...
Why is MATLAB so fast in matrix multiplication?
...Update using R2018b on a WIN64 machine with 16 physical cores and a Tesla V100:
>> timeit(@()A*A)
ans =
0.0229
>> gputimeit(@()gA*gA)
ans =
4.8019e-04
(NB: at some point (I forget when exactly) gpuArray switched from MAGMA to cuBLAS - MAGMA is still used for some gpuArray opera...
how to unit test file upload in django
... Image
from io import StringIO
def create_image(storage, filename, size=(100, 100), image_mode='RGB', image_format='PNG'):
"""
Generate a test image, returning the filename that it was saved as.
If ``storage`` is ``None``, the BytesIO containing the image data
will be passed instead.
...
How to do the equivalent of pass by reference for primitives in Java
... void changeMyNumber(AtomicInteger myNumber) {
myNumber.getAndSet(100);
}
}
Output:
MyNumber before method Call:0
MyNumber After method Call:100
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