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Should I pass an std::function by const-reference?
...e are forced to copy the std::function.
That store makes passing by value more optimal. If there is any possibility you are storing a copy of the std::function, pass by value. Otherwise, either way is roughly equivalent: the only downside to by-value is if you are taking the same bulky std::funct...
Java Equivalent of C# async/await?
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Uses for Optional
...atches use case #1 in the OP's question. Although, absence of a value is a more precise formulation than null since something like IntStream.findFirst could never return null.
For use case #2, passing an optional argument to a method, this could be made to work, but it's rather clumsy. Suppose you ...
Rails server says port already used, how to kill that process?
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Team Build Error: The Path … is already mapped to workspace
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How to uninstall a Windows Service when there is no executable for it left on the system?
...sc.exe in the System folder and it needs Administrative privileges to run. More information in this Microsoft KB article.
Alternatively, you can directly call the DeleteService() api. That way is a little more complex, since you need to get a handle to the service control manager via OpenSCManager(...
Can we delete an SMS in Android before it reaches the inbox?
...fluence SMS delivery.
Check out this Android Developers blog post for some more info:
http://android-developers.blogspot.com/2013/10/getting-your-sms-apps-ready-for-kitkat.html
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The remote end hung up unexpectedly while git cloning
...ng to double the value):
git config --global http.postBuffer 1048576000
More information:
From the git config man page, http.postBuffer is about:
Maximum size in bytes of the buffer used by smart HTTP transports when POSTing data to the remote system.
For requests larger than this buffer s...
How do I modify fields inside the new PostgreSQL JSON datatype?
...one for json; casts are required to manipulate json values).
Merging 2 (or more) JSON objects (or concatenating arrays):
SELECT jsonb '{"a":1}' || jsonb '{"b":2}', -- will yield jsonb '{"a":1,"b":2}'
jsonb '["a",1]' || jsonb '["b",2]' -- will yield jsonb '["a",1,"b",2]'
So, setting a simple...