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Why doesn't the example compile, aka how does (co-, contra-, and in-) variance work?
...r. This declaration as a whole means that Function1 is contravariant in P and covariant in R. Thus, we can derive the following axioms:
T1' <: T1
T2 <: T2'
---------------------------------------- S-Fun
Function1[T1, T2] <: Function1[T1', T2']
Notice that T1' must be a subtype (or the ...
Android phone orientation overview including compass
I've been trying to get my head around the Android orientation sensors for a while.
I thought I understood it. Then I realised I didn't. Now I think (hope) I have a better feeling for it again but I am still not 100%. I will try and explain my patchy understanding of it and hopefully people will be ...
Why git can't do hard/soft resets by path?
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Because there's no point (other commands provide that functionality already), and it reduces the potential for doing the wrong thing by accident.
A "hard reset" for a path is just done with git checkout HEAD -- <path> (checking out the existing version o...
Best practice for Django project working directory structure
... I've found that it's hard to create a directory structure that works well and remain clean for every developer and administrator. There is some standard structure in most projects on github. But it does not show a way to organize another files and all projects on pc.
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Read a file line by line assigning the value to a variable
...cho "Text read from file: $line"
done < my_filename.txt
This is the standard form for reading lines from a file in a loop. Explanation:
IFS= (or IFS='') prevents leading/trailing whitespace from being trimmed.
-r prevents backslash escapes from being interpreted.
Or you can put it in a bash...
How can i take an UIImage and give it a black border?
...eView, the image is viewed perfectly but the sides of image is left blank, and the same happens to the upper and lower portion of the image when image is landscape. The blank space looks ugly with border set to it.. Did you faced this issue? If yes, please suggest a method to solve this
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Compiling with g++ using multiple cores
...LAGS. I had completely forgotten that "-j#" was a parameter for GNU make (and not for GCC).
– chriv
Sep 30 '12 at 3:24
34
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How to sort a collection by date in MongoDB?
I am using MongoDB with Node.JS. I have a collection which contains a date and other rows. The date is a JavaScript Date object.
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How do you fade in/out a background color using jquery?
...as the highlight effect
https://api.jqueryui.com/highlight-effect/
Color and duration are variable
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Testing web application on Mac/Safari when I don't own a Mac
...ntly when a web site I launched displayed perfectly on IE, Firefox, Chrome and Safari on Windows but was corrupted when viewed using Safari on the Mac (by a potential customer), I need to start testing how my sites look when viewed on a Mac.
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