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Concept behind these four lines of tricky C code

... } else { printf((char*) m); } } It recursively calls main() 771 times. In the beginning, m[0] = 7709179928849219.0, which stands for C++Suc;C. In every call, m[0] gets doubled, to "repair" last two letters. In the last call, m[0] contains ASCII char representation of C++...
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.NET List Concat vs AddRange

... They have totally different semantics. AddRange modifies the list by adding the other items to it. Concat returns a new sequence containing the list and the other items, without modifying the list. Choose whichever one has the semantic...
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How to search DOM elements using XPath or CSS selectors in Chrome Developer Tools?

...ction accepts a second optional argument, context. $x(xpath, context) This allows you to select a particular iframe content, for example, and run an xpath query against it. So for the first iframe: myframe = document.getElementsByTagName("iframe")[0].contentWindow.document.body; #to xpath query that...
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How to use greater than operator with date?

... In your statement, you are comparing a string called start_date with the time. If start_date is a column, it should either be SELECT * FROM `la_schedule` WHERE start_date >'2012-11-18'; (no apostrophe) or SELECT * FROM `la_schedule` WHERE `start_date` &gt...
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Remove header and footer from window.print()

...ome margins/paddings in your body element so that the content won't extend all the way to the page's edge. Since common printers just can't get no-margins printing and it's probably not what you want, you should use something like this: @media print { @page { margin: 0; } body { margin: 1.6cm;...
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Emacs - Multiple columns one buffer

...d for getting Emacs (or indeed another editor) to show me multiple columns all pointing to the same buffer? 7 Answers ...
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Parallel.ForEach() vs. foreach(IEnumerable.AsParallel())

...takes the anonymous delegate, and runs multiple threads on this code in parallel for all the different items. The second one not very useful in this scenario. In a nutshell it is intended to do a query on multiple threads, and combine the result, and give it again to the calling thread. So the code...
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Swift variable decorations with “?” (question mark) and “!” (exclamation mark)

I understand that in Swift all variables must be set with a value, and that by using optionals we can set a variable to be set to nil initially. ...
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MySQL - ORDER BY values within IN()

... direction after each part. The equality check would have a value of 1 and all the rest would be 0, so I would need the one that passed the check, to come up first. – The Unknown Dev Sep 16 at 21:29 ...
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type object 'datetime.datetime' has no attribute 'datetime'

... Datetime is a module that allows for handling of dates, times and datetimes (all of which are datatypes). This means that datetime is both a top-level module as well as being a type within that module. This is confusing. Your error is probably based ...