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Forward declaration of nested types/classes in C++
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It gives the error: "'class C' redeclared as different kind of symbol"
– Calmarius
Jun 4 '09 at 16:53
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How is pattern matching in Scala implemented at the bytecode level?
...atterns like or patterns and combinations like "case Foo(45, x)", but generally those are just logical extensions of what I just described. Patterns can also have guards, which are additional constraints on the predicates. There are also cases where the compiler can optimize pattern matching, e.g...
simulate background-size:cover on or
... that it doesn't handle scaling correctly. If the surrounding element is smaller than the video file, it isn't scaled down. Even if you give the video tag a tiny initial size, like 16px by 9px, auto ends up forcing it to a minimum of its native file-size. With the current top-voted solution on this ...
Do you need to use path.join in node.js?
... only real issue is that Windows command-line processors (or, more specifically, Windows-native command-line utilities) tend to interpret forward slashes as option specifiers rather than path components. Therefore, you need a backslashed path if you need to pass a path to a Windows command run as a ...
How do you run a single test/spec file in RSpec?
...tests — for the one file I'm editing, for example. rake spec executes all the specs. My project is not a Rails project, so rake spec:doc doesn't work.
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Creating and Update Laravel Eloquent
...fault value or its id column auto incremented one.
Otherwise it will throw error when executing above example:
Illuminate\Database\QueryException with message 'SQLSTATE[HY000]: General error: 1364 Field '...' doesn't have a default value (SQL: insert into `...` (`...`,.., `updated_at`, `created_at`)...
How do I find the .NET version?
How do I find out which version of .NET is installed?
19 Answers
19
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How to test which port MySQL is running on and whether it can be connected to?
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ERROR 1146 (42S02): Table 'performance_schema.global_variables' doesn't exist
– Maria Ines Parnisari
Sep 5 '16 at 1:20
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Determine if a function exists in bash
...t it is the option that produces minimal output, and you can still use the errorlevel. You could get the result without a subprocess, eg type -t realpath > /dev/shm/tmpfile ; read < /dev/shm/tmpfile (bad example). However, declare is the best answer since is has 0 disk io.
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Confused about Service vs Factory
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All angular services are singletons:
Docs (see Services as singletons): https://docs.angularjs.org/guide/services
Lastly, it is important to realize that all Angular services are application singletons. This means that t...