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How do I split a string so I can access item x?
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How to “EXPIRE” the “HSET” child key in redis?
...se. This allows all those keys to fall in the same hash slot. You can read more about it here: https://redis.io/topics/cluster-tutorial
Now if we want to do the same operation of hashes, we could do:
HDEL hash_top_key child_key_1 => DEL {hash_top_key}child_key_1
HGET hash_top_key child_key_1 =...
Lock, mutex, semaphore… what's the difference?
... number of cpu, io or ram intensive tasks running at the same time.
For a more detailed post about the differences between mutex and semaphore read here.
You also have read/write locks that allows either unlimited number of readers or 1 writer at any given time.
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How to check if a column exists in a SQL Server table?
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A more concise version
IF COL_LENGTH('table_name','column_name') IS NULL
BEGIN
/* Column does not exist or caller does not have permission to view the object */
END
The point about permissions on viewing metadata applies to ...
Joins are for lazy people?
...n.
Edit: There are some rare cases where custom client code can do things more efficiently than a straightforward DB join (see comment by meriton). But this is very much the exception.
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Java equivalent of C#'s verbatim strings with @
... i love c# 6 with @"string" and $"string{i}" and very futures more than java
– Guido Mocha
May 11 '17 at 7:39
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What is the difference between a 'closure' and a 'lambda'?
... lambdas are not true closures, they are simulations of closures. They are more similar to Python 2.3 closures (no mutability, hence the requirement for the variables referenced to be 'effectively final'), and internally compile to non-closure functions that take all variables referenced in the encl...
When should I use OWIN Katana?
...the webserver that is serving the request.
In return, applications can be more easily ported between hosts and potentially entire platforms/operating systems. For example, the ability to host an application in a console or any process allows Mono to host it without efforts... (Raspberry Pi anyone)
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Copying files using rsync from remote server to local machine
...e so /path/to/local/storage/copy. If that's what you want great. However a more common scenario is you want to copy the contents of the remote directory into a directory in your local. Then you would do /path/to/copy/ which would place the contents inside the directory /path/to/local/storage without...
Why Doesn't C# Allow Static Methods to Implement an Interface?
...mal";
public string ScreenName(){ return AnimalScreenName; }
}
For a more complicated situation, you could always declare another static method and delegate to that. In trying come up with an example, I couldn't think of any reason you would do something non-trivial in both a static and insta...