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How to get current CPU and RAM usage in Python?
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Worked for me on OSX: $ pip install psutil; >>> import psutil; psutil.cpu_percent() and >>> psutil.virtual_memory() which returns a nice vmem object: vmem(total=8589934592L, available=4073336832L, percent=52.6, used=5022085120L, free=35602...
How to connect to LocalDB in Visual Studio Server Explorer?
...e View menu, open SQL Server Object Explorer.
Right click on the {YourTableName} table > View Designer
Done.
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Weighted random numbers
...a weighted random numbers. I'm currently just banging my head against the wall and cannot figure this out.
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How to print without newline or space?
...to the end of the string:
print('.', end='')
To not add a space between all the function arguments you want to print:
print('a', 'b', 'c', sep='')
You can pass any string to either parameter, and you can use both parameters at the same time.
If you are having trouble with buffering, you can f...
In Flux architecture, how do you manage Store lifecycle?
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In a Flux app there should only be one Dispatcher. All data flows through this central hub. Having a singleton Dispatcher allows it to manage all Stores. This becomes important when you need Store #1 update itself, and then have Store #2 update itself based on both the Acti...
JPA: unidirectional many-to-one and cascading delete
...y parent's collection.
Or, specify the foreign key constraint in the child table as ON DELETE CASCADE. You'll need to invoke EntityManager.clear() after calling EntityManager.remove(parent) as the persistence context needs to be refreshed - the child entities are not supposed to exist in the persist...
Redis - Connect to Remote Server
...stening where you expect, check your config file just to be sure.
After establishing it is listening where you expect it to, from a remote node which should have access try:
redis-cli -h REMOTE.HOST ping
You could also try that from the local host but use the IP you expect it to be listening on ...
What is eager loading?
... context of a ORM (Object Relational Mapper), where you map an object to a table in a relational database.
– Loki
Aug 19 '09 at 11:44
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Set Django IntegerField by choices=… name
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Really like the Encapsulation section on the blog.
– Nathan Keller
Mar 3 '13 at 21:57
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Why does ConcurrentHashMap prevent null keys and values?
...and get calls, causing this snippet to return a null that was never in the table, rather than the desired KeyNotPresentException.
Normally you would solve that by synchronizing, but with a concurrent map that of course won't work. Hence the signature for get had to change, and the only way to do th...