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Understanding the Event Loop
... of queues of stuff that needs doing and every "tick" of the event loop it selects one, removes it from the queue, and runs it.
A key thing to understand is that node relies on the OS for most of the heavy lifting. So incoming network requests are actually tracked by the OS itself and when node is ...
Checking images for similarity with OpenCV
...ive error between images.
double errorL2 = norm( A, B, CV_L2 );
// Convert to a reasonable scale, since L2 error is summed across all pixels of the image.
double similarity = errorL2 / (double)( A.rows * A.cols );
return similarity;
}
else {
//Images have a different size
ret...
What's the difference between using CGFloat and float?
...memory, which can result in using more memory overall. so its def worth to convert everything up to 64-bits. (unless you want to support 5.1+ or 6.0+ still)
– phil88530
Dec 30 '13 at 14:26
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Hook up Raspberry Pi via Ethernet to laptop without router? [closed]
...how-to-set-up-raspberry-pi-without-a-monitor/54393#54393
UART serial USB converter
This is an alternative to SSH if you just want to get a shell on the Pi: https://en.wikipedia.org/wiki/Serial_port
This does not use SSH or networking itself, but rather the older, simpler, more direct, more relia...
How to iterate over rows in a DataFrame in Pandas
...ating over multiple columns" example needs a caveat: DataFrame.values will convert every column to a common data type. DataFrame.to_numpy() does this too. Fortunately we can use zip with any number of columns.
– David Wasserman
Jan 16 at 20:44
...
How can I use different certificates on specific connections?
...n, but in the end yours is the approach I took. I had a gruelling task of converting the PEM certificate file to a JKS Java keystore file, and I found assistance for that here: stackoverflow.com/questions/722931/…
– skiphoppy
May 13 '09 at 21:37
...
Eclipse, where to change the current debug line background?
...
GGGGGggggreat! I had to select the text to be able to read it! (I wasn't gonna change my whole color scheme for that damn debugger!) and couldn't find this configuration! thanks!
– Petruza
Feb 8 '12 at 14:57
...
Delete a line in Eclipse
...Visual Studio, you would use Ctrl + L , whereas in Eclipse I am forced to select a line or, if it is empty, go the beginning of the line before clicking delete/backspace.
...
How do I set ${user} in Eclipse to get the correct @author tag? [duplicate]
... Preferences > Java > Code Style > Code Templates > Comments
Select Types and edit the template to insert another value (possibly a fixed one for now, or change the user.name property as mmyers suggests)
/**
* @author myUserValue
*
* ${tags}
*/
...
how to mix links ( tag ) and headings ( tag ) in web standard?
...
a > h1 will cause difficulty in selecting text
Since both are completely valid in HTML5, it is better to use h1 > a
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