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How to drive C#, C++ or Java compiler to compute 1+2+3+…+1000 at compile time?

In a recent interview, I was asked a really strange question. The interviewer asked me how can I compute 1+2+3+...+1000 just using compiler features. This means that I am not allowed to write a program and execute it, but I should just write a program that could drive the compiler to compute this su...
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Reset/remove CSS styles for element only

...ord-spacing : normal; z-index : auto; /* basic modern patch */ all: initial; all: unset; } /* basic modern patch */ #reset-this-root { all: initial; * { all: unset; } } Relevent github repo with a december 2017 more exaustive list Related Related from MDN Rel...
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When should I use perror(“…”) and fprintf(stderr, “…”)?

...should use fprintf(stderr, fmt, ...). For example, strtol will return LONG_MAX or LONG_MIN if a string is out of range and set errno to ERANGE. So if strtol fails due to out of range, I would use perror. – freeboy1015 Aug 24 '12 at 2:22 ...
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Making heatmap from pandas DataFrame

...t instead of %matplotlib inline and finish with plt.show() in order to actually see the plot. – tsveti_iko Jul 23 '19 at 15:19 ...
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Can you attach a UIGestureRecognizer to multiple views?

...rray...: >; layer = <CALayer: ...>>) at a time, this was never allowed, and is now enforced. Beginning with iOS 9.0 it will be put in the first view it is loaded into. – George Brown Jan 5 '16 at 21:54 ...
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How do I restore a missing IIS Express SSL Certificate?

...press, according to such articles as this and this , I am unable to actually load an IIS Express site using HTTPS. In Chrome , I am only getting: ...
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WCF timeout exception detailed investigation

... It only took a year, but I finally ran another stress test on the application with this flag set. The issue appears solved, so I am giving you the best answer. I would not be surprised that this was the last piece of the puzzle that was required but that ...
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What is the best open XML parser for C++? [duplicate]

... How about RapidXML? RapidXML is a very fast and small XML DOM parser written in C++. It is aimed primarily at embedded environments, computer games, or any other applications where available memory or CPU processing power comes at a premium. RapidXML is licensed under Boost ...
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STL or Qt containers?

... (see the std::string COW controversy). Some STL implementations are especially bad. provide hashes, which are not available unless you use TR1 The QTL has a different philosophy from the STL, which is well summarized by J. Blanchette: "Whereas STL's containers are optimized for raw speed, Qt's co...
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What is “thread local storage” in Python, and why do I need it?

In Python specifically, how do variables get shared between threads? 5 Answers 5 ...