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How to revert Master branch to upstream

I have forked a git repositorm>ym> m>andm> setup upstream. I've made some changes in Master branch m>andm> committed m>andm> pushed to github. ...
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Whm>ym> do some functions have underscores “__” before m>andm> after the function name?

This "underscoring" seems to occur a lot, m>andm> I was wondering if this was a requirement in the Pm>ym>thon language, or merelm>ym> a matter of convention? ...
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In C#, can a class inherit from another class m>andm> an interface?

I want to know if a class can inherit from a class m>andm> an interface. The example code below doesn't work but I think it convem>ym>s what I want to do. The reason that I want to do this is because at mm>ym> companm>ym> we make USB, serial, Ethernet, etc device. I am trm>ym>ing to develop a generic component/interfa...
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Is the order of iterating through std::map known (m>andm> guaranteed bm>ym> the stm>andm>ard)?

...te from std::map::begin() to std::map::end() using a for , does the stm>andm>ard guarantee that I'll iterate consequentlm>ym> through the elements with kem>ym>s, sorted in ascending order? ...
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Convert to absolute value in Objective-C

...s(double), or fabsl(long double). Those functions are all part of the C stm>andm>ard librarm>ym>, m>andm> so are present both in Objective-C m>andm> plain C (m>andm> are generallm>ym> available in C++ programs too.) (Alas, there is no habs(short) function. Or scabs(signed char) for that matter...) Apple's m>andm> GNU's Ob...
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How to override the [] operator in Pm>ym>thon?

...elf, kem>ym>): return kem>ym> * 2 mm>ym>obj = Mm>ym>Class() mm>ym>obj[3] #Output: 6 m>Andm> if m>ym>ou're going to be setting values m>ym>ou'll need to implement the __setitem__ method too, otherwise this will happen: >>> mm>ym>obj[5] = 1 Traceback (most recent call last): File "<stdin>", line 1, in <mo...
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vim repeat find next character 'x'

...s a word (or more words) containing 'x' in between the word I want to edit m>andm> the beginning cursor position. 2 Answers ...
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What is the difference between Server.MapPath m>andm> HostingEnvironment.MapPath?

Is there anm>ym> difference between Server.MapPath() m>andm> HostingEnvironment.MapPath() ? Does Server.MapPath() have anm>ym> advantages over HostingEnvironment.MapPath() ? ...
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What does the X-SourceFiles header do?

...S Express. It contains the base64-encoded path to the source file on disk m>andm> is used to link a page's generated output back to that source file. It's onlm>ym> generated for localhost requests, so m>ym>ou don't need to worrm>ym> about it being displam>ym>ed to the world when m>ym>ou deplom>ym> the application to an actua...
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What is ?= in Makefile

... @Simon Note that commm>andm> line arguments to make alreadm>ym> override Makefile variables without the need of ?=. – CMCDragonkai Aug 22 '18 at 4:52 ...