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Structure padding and packing
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+allyourcode The standard guarantees that the order of the members will be preserved and that the first member will start at 0 offset.
– martinkunev
Dec 8 '17 at 14:32
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What are the best practices for SQLite on Android?
...ld. You can create multiple subclasses of the one DatabaseManager class in order to have different databases on disk.
Instantiate your subclass and call getDb() to use the SQLiteDatabase class.
Call close() for each subclass you instantiated
The code to copy/paste:
import android.content.Context;...
Why do we need boxing and unboxing in C#?
... a different method overload for each value type (bit, byte, int16, int32, etc etc etc).
Boxing prevented this from happening. And that's why the British celebrate Boxing Day.
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How to get number of rows using SqlDataReader in C#
...nected to the DB and it is waiting for you to do whatever you are doing in order to read/process the next result before it moves on. In this case you might get better performance if you pull in all of the data, close the connection to the DB and process the results "offline".
People seem to hate d...
How can I stop redis-server?
...if you are on ubuntu you can try to restart redis server through init.d:
/etc/init.d/redis-server restart
or stop/start it:
/etc/init.d/redis-server stop
/etc/init.d/redis-server start
On Mac
redis-cli shutdown
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Bare asterisk in function arguments?
...s probably to quietly gobble up all the remaining positional arguments, in order to force the remaining arguments to be keyword-only.
– Stephen
Apr 25 '18 at 17:19
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Gulp command not found after install
...ed the npm root -g was pointing to /usr/local/lib/node_modules/npm, but in order to install gulp in /usr/local/lib/node_modules, I had to use sudo:
sudo npm install gulp -g
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Amazon EC2, mysql aborting start because InnoDB: mmap (x bytes) failed; errno 12
...le
Run swapon /swapfile
Add this line /swapfile swap swap defaults 0 0 to /etc/fstab
Step 4 is needed if you would like to automatically enable swap file after each reboot.
Some useful command related to SWAP space:
$ swapon -s
$ free -k
$ swapoff -a
$ swapon -a
References:
http://www.thegee...
Are the days of passing const std::string & as a parameter over?
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@ildjarn: In order analysis, if the worst case of something is bound by a constant, then it's still constant time. Is there not a longest small string? Doesn't that string take some constant amount of time to copy? Don't all smaller st...
Can I “multiply” a string (in C#)?
... the scenes, then mutates it. It doesn't work like a regular List<T> etc.
– Marc Gravell♦
Feb 10 '09 at 16:05
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