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Why do some functions have underscores “__” before and after the function name?

...worker(self): try: self._worker() except tornado.web.HTTPError, e: self.set_status(e.status_code) except: logging.error("_worker problem", exc_info=True) self.set_status(500) tornado.ioloop.IOLoop.instance().add_callback(self.async_callback(self.resu...
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Why does Vim save files with a ~ extension?

...he original file (resulting in the risk of destroying it in case of an I/O error). But you prevent "jumping files" on the Windows desktop with it, which is the primary reason for me to have nowritebackup in place. share ...
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Create Git branch with current changes

... You'll get the 'no upstream branch' error only if you push the new branch, not when you commit the new work. – sam Nov 15 '17 at 23:59 2 ...
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Browse the files created on a device by the iOS application I'm developing, on workstation?

... Seems not to work on iOS 10.3 - I always get permission errors when trying to open app folders. – JustAMartin Aug 2 '17 at 17:12 ...
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What causes a TCP/IP reset (RST) flag to be sent?

...in a wrong state, it sends a RST packet which indicates other side that an error has occured. share | improve this answer | follow | ...
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Easier way to debug a Windows service

... wanted to have an "interactive" instance when double clicking and not and error message about the fact that a service cannot be started that way. Varying goals I guess ;-) – Christian.K Feb 16 '12 at 9:36 ...
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Left align two graph edges (ggplot)

...ne of the plots is a tableGrob. The gtable::cbind gives me a disappointing error: nrow(x) == nrow(y) is not TRUE. Any suggestions? – Gabra Sep 11 '15 at 8:14 2 ...
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jQuery scroll to element

... etc...) where the normal jquery function didn't work (it didn't return an error, but it didn't work). – itoctopus Jul 16 at 12:05
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Accessing class variables from a list comprehension in the class definition

... example with a set or dict comprehension would break in Python 2. # Same error, in Python 2 or 3 y = {x: x for i in range(1)} The (small) exception; or, why one part may still work There's one part of a comprehension or generator expression that executes in the surrounding scope, regardless of ...
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Same-named attributes in attrs.xml for custom view

... When I follow this answer I get ERROR: In <declare-styleable> com_app_view_widget, unable to find attribute customAttr For all the view I try to declare for. Any ideas? – Dapp Jun 9 '14 at 14:54 ...