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What does auto&& tell us?

...eness it originally had so I can use it most efficiently - this might invalidate it. As in: auto&& var = some_expression_that_may_be_rvalue_or_lvalue; // var was initialized with either an lvalue or rvalue, but var itself // is an lvalue because named rvalues are lvalues use_it_elsewhere(st...
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Concatenating two one-dimensional NumPy arrays

...1, a2, a3) or numpy.concatenate(*[a1, a2, a3]) if you prefer. Python's fluid enough that the difference ends up feeling more cosmetic than substantial, but it's good when the API is consistent (e.g. if all the numpy functions that take variable length argument lists require explicit sequences). ...
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Scrollable Menu with Bootstrap - Menu expanding its container when it should not

I tried this method ( their fiddle ) to enable scrollable menu with Bootstrap, but with that approach, the scrollable menu expands its container -- fiddle -- the non-scrollable menu, correctly, does not do this. ...
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iOS 8 removed “minimal-ui” viewport property, are there other “soft fullscreen” solutions?

...ientation. It is invisible to the user the entire time. This element has ID brim-treadmill. Upon loading the page or after changing the orientation, Brim is using Scream to detect if page is in the minimal-ui view (page that has been previously in minimal-ui and has been reloaded will r...
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Understanding the Event Loop

...run something asynchronously is by invoking one of the async functions provided by the node core library. Even if you are using an npm package that defines it's own API, in order to yield the event loop, eventually that npm package's code will call one of node core's async functions and that's when ...
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Understanding NSRunLoop

... A run loop is an abstraction that (among other things) provides a mechanism to handle system input sources (sockets, ports, files, keyboard, mouse, timers, etc). Each NSThread has its own run loop, which can be accessed via the currentRunLoop method. In general, you do not need to ...
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Why do I need 'b' to encode a string with Base64?

...omes a string. A string is a sequence of Unicode characters. base64 has no idea what to do with Unicode data, it's not 8-bit. It's not really any bits, in fact. :-) In your second example: >>> encoded = base64.b64encode('data to be encoded') All the characters fit neatly into the ASCII ...
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Difference between timestamps with/without time zone in PostgreSQL

...one. Thus, when converting timestamptz to a time zone you are asking what did the clock show in New York at this absolute point in time? whereas when "converting" a timestamp, you're asking what was the absolute point in time when the clock in New York showed x? – fphilipe ...
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Difference between / and /* in servlet mapping url pattern

... <url-pattern>/*</url-pattern> The /* on a servlet overrides all other servlets, including all servlets provided by the servletcontainer such as the default servlet and the JSP servlet. Whatever request you fire, it will end up in that servlet. This is thus a bad URL pattern for s...
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Booleans, conditional operators and autoboxing

...n; since null (type "the special null type") can be implicitly converted (widened) to any type, you can consider the special null type to be a "superclass" of any type (class) for the purposes of lub(). – Bert F Apr 25 '14 at 13:03 ...