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When should you use constexpr capability in C++11?

... "function that always returns 5" is breaking or diluting the meaning of "calling a function". There must be a reason, or a need for this capability or it wouldn't be in C++11. Why is it there? ...
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How to overcome TypeError: unhashable type: 'list'

...used to compare dictionary keys during a dictionary lookup quickly. Internally, hash() method calls __hash__() method of an object which are set by default for any object. Converting a nested list to a set >>> a = [1,2,3,4,[5,6,7],8,9] >>> set(a) Traceback (most recent call last...
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Download File Using jQuery

... Thanks, this is what I was looking for. I usually use "preventDefault", just left it out above because I was being lazy. ;-) – Dodinas Aug 18 '09 at 21:38 ...
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Why doesn't GCC optimize a*a*a*a*a*a to (a*a*a)*(a*a*a)?

...scientific application. One thing I noticed is that GCC will optimize the call pow(a,2) by compiling it into a*a , but the call pow(a,6) is not optimized and will actually call the library function pow , which greatly slows down the performance. (In contrast, Intel C++ Compiler , executable ...
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How to log PostgreSQL queries?

How to enable logging of all SQL executed by PostgreSQL 8.3? 10 Answers 10 ...
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ORA-30926: unable to get a stable set of rows in the source tables

... This is usually caused by duplicates in the query specified in USING clause. This probably means that TABLE_A is a parent table and the same ROWID is returned several times. You could quickly solve the problem by using a DISTINCT in yo...
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Remove spaces from std::string in C++

... preferred way to remove spaces from a string in C++? I could loop through all the characters and build a new string, but is there a better way? ...
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What is the best way to repeatedly execute a function every x seconds?

...uler. import sched, time s = sched.scheduler(time.time, time.sleep) def do_something(sc): print("Doing stuff...") # do your stuff s.enter(60, 1, do_something, (sc,)) s.enter(60, 1, do_something, (s,)) s.run() If you're already using an event loop library like asyncio, trio, tkinter,...
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iOS UIImagePickerController result image orientation after upload

...uite similar to this one) that includes a lengthy discussion of what's actually going on. – Gallymon Nov 29 '13 at 4:30  |  show 21 more comme...
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UILabel text margin [duplicate]

...ilIndent = -10.0f; NSAttributedString *attrText = [[NSAttributedString alloc] initWithString:title attributes:@{ NSParagraphStyleAttributeName : style}]; UILabel * label = [[UILabel alloc] initWithFrame:someFrame]; label.numberOfLines = 0; label.attributedText = attrText; Here is the above e...