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Why does volatile exist?
...ed 16 bit value as a semaphore to know when the other guy was done. Essentially we did this:
void waitForSemaphore()
{
volatile uint16_t* semPtr = WELL_KNOWN_SEM_ADDR;/*well known address to my semaphore*/
while ((*semPtr) != IS_OK_FOR_ME_TO_PROCEED);
}
Without volatile, the optimizer sees ...
pytest: assert almost equal
...
I noticed that this question specifically asked about py.test. py.test 3.0 includes an approx() function (well, really class) that is very useful for this purpose.
import pytest
assert 2.2 == pytest.approx(2.3)
# fails, default is ± 2.3e-06
assert 2.2 == pyte...
How to list empty folders in linux
In Linux how do I check all folders in a directory and output the name of all directories that are empty to a list.
1 Answe...
creating a strikethrough text?
...
it really works, but can i change its properities i mean its size, its color something like that
– nawfal cuteberg
Mar 20 '12 at 12:35
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Changing UIButton text
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@erdekhayser Actually, read-only properties CAN have read/write properties. I use the titlelabel's tag to pass an integer to a action method. Also see Apple's docs link Although this property is read-only, its own properties are read/write. U...
GridCtrl 控件FAQ - C/C++ - 清泛网 - 专注C/C++及内核技术
... BOOL DeleteRow(int nRow);
BOOL DeleteNonFixedRows();
BOOL DeleteAllItems();
11.可以在第一个单元格中加入Check控件
A：
#include "NewCellTypes/GridCellCheck.h"//包含头文件
BOOL CGridCtrl::SetCellType(int nRow, int nCol, CRuntimeClass* pRuntime...
Creating your own header file in C
... I was wondering if you could elaborate on how to compile with all required files and not have to include foo.c into gcc program argument. What is this technique called or what program can accomplish this outside of IDE - Make comes to my mind
– nf071590
...
Passing data between a fragment and its container activity
...
In your fragment you can call getActivity().
This will give you access to the activity that created the fragment. From there you can obviously call any sort of accessor methods that are in the activity.
e.g. for a method called getResult() on your A...
How do you divide each element in a list by an int?
...
The way you tried first is actually directly possible with numpy:
import numpy
myArray = numpy.array([10,20,30,40,50,60,70,80,90])
myInt = 10
newArray = myArray/myInt
If you do such operations with long lists and especially in any sort of scientific com...
What does @media screen and (max-width: 1024px) mean in CSS?
...ut a media query and use 'max-width' to overwrite this when it goes to a smaller device
– MintWelsh
Jun 16 '15 at 12:01
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