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How do I install Python OpenCV through Conda?
...deo can be opened, I wanted to confirm that I could extract a frame (frame 100) as an array. In openCV 2.4.9, the command for this was cap.set(cv2.cv.CV_CAP_PROP_POS_FRAMES, 100). In openCV 3.2.0, the equivalent command has changed to cap.set(cv2.CAP_PROP_POS_FRAMES, 100)
– oll...
Error Code: 2013. Lost connection to MySQL server during query
...imeout and a suitable value (in seconds) - for example: --net_read_timeout=100.
For reference see here and here.
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C++ lambda with captures as a function pointer
...SBKerrek SB
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What is the difference between `sorted(list)` vs `list.sort()`?
...'s our setup:
import timeit
setup = """
import random
lists = [list(range(10000)) for _ in range(1000)] # list of lists
for l in lists:
random.shuffle(l) # shuffle each list
shuffled_iter = iter(lists) # wrap as iterator so next() yields one at a time
"""
And here's our results for a list of...
How do I toggle an element's class in pure JavaScript?
... classes + class1;
}
.red {
background-color: red
}
div {
width: 100px;
height: 100px;
margin-bottom: 10px;
border: 1px solid black;
}
<div class="does red redAnother " onclick="toogleClass(this, 'red')"></div>
<div class="does collapse navbar-collapse " onclic...
MFC OnEraseBkgnd浅析 - C/C++ - 清泛网 - 专注C/C++及内核技术
.../需要修改的控件标题
pWnd ->GetParent()->InvalidateRect(CRect(0,0,100,50),TRUE);
pWnd ->GetParent()->InvalidateRect(CRect(0,0,100,50),TRUE);
this->RedrawWindow();
MFC OnEraseBkgnd
Java int to String - Integer.toString(i) vs new Integer(i).toString()
...ce then the Integer.toString(i); is expensive if you are calling less than 100 million times. Else if it is more than 100 million calls then the new Integer(10).toString() will perform better.
Below is the code through u can try to measure the performance,
public static void main(String args[]) {
...
Why not use Double or Float to represent currency?
...y do
you have left?
System.out.println(1.03 - .42);
prints out 0.6100000000000001.
The right way to solve this problem is
to use BigDecimal, int or long
for monetary calculations.
Though BigDecimal has some caveats (please see currently accepted answer).
...
MemoryCache does not obey memory limits in configuration
...
100
Wow, so I just spent entirely too much time digging around in the CLR with reflector, but I th...
How to get last items of a list in Python?
... can then pass the slice object to your sequence:
>>> list(range(100))[last_nine_slice]
[91, 92, 93, 94, 95, 96, 97, 98, 99]
islice
islice from the itertools module is another possibly performant way to get this. islice doesn't take negative arguments, so ideally your iterable has a __r...