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How to upgrade PostgreSQL from version 9.6 to version 10.1 without losing data?
....org/pub/repos/apt/ utopic-pgdg main
Follow below commands
wget -q -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
sudo apt-get update
sudo apt-get install postgresql-9.4
sudo pg_dropcluster --stop 9.4 main
sudo /etc/init.d/postgresql start
Now we have everything, ...
Downcasting shared_ptr to shared_ptr?
... std::dynamic_pointer_cast<Derived> (base);
Documentation: https://en.cppreference.com/w/cpp/memory/shared_ptr/pointer_cast
Also, I don't recommend using cast operator in the base class. Implicit casting like this may become the source of bugs and errors.
-Update: If the type is no...
Free space in a CMD shell
... 98G 14G 84G 15% /cygdrive/r
Cygwin is available for free from: https://www.cygwin.com/
It adds many powerful tools to the command prompt. To get just the available space on drive M (as mapped in windows to a shared drive), one could enter in:
M:\>df -h | grep M: | awk '{print $4}'
...
How to merge a list of lists with same type of items to a single list of items?
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C++ where to initialize static const
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What is the difference between “Form Controls” and “ActiveX Control” in Excel 2010?
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Move the mouse pointer to a specific position?
...milar to click-and-drag events.
Here's the release documentation:FireFox: https://developer.mozilla.org/en-US/docs/Web/API/Pointer_Lock_APIChrome: http://www.chromium.org/developers/design-documents/mouse-lock
And here's a pretty neat demonstration: http://media.tojicode.com/q3bsp/
...
Postgres could not connect to server
... old databases and then reinitialized the postgres db schema.
Thanks to https://github.com/Homebrew/homebrew/issues/35240 for that solution.
After regenerating my databases (with rake db:create) everything worked fine again.
...
Should ol/ul be inside or outside?
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What's the difference between `1L` and `1`?
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