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What is the difference between a static and a non-static initialization code block
...lock is an instance initializer.
Class initializers are executed in the order they are defined (top down, just like simple variable initializers) when the class is loaded (actually, when it's resolved, but that's a technicality).
Instance initializers are executed in the order defined when the c...
What is the .idea folder?
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MySQL high CPU usage [closed]
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Checking if a SQL Server login already exists
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In order to hande naming conflict between logins, roles, users etc. you should check the type column according to Microsoft sys.database_principals documentation
In order to handle special chacters in usernames etc, use N'<na...
How To Set Up GUI On Amazon EC2 Ubuntu server
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Escaping keyword-like column names in Postgres
...es, or you can specify schema name with dot concatenation.
Let's Suppose, order is the keyword registered by Postgres. And in some scenarios, you must have to use this keyword as a table name.
At that time, Postgres will allow you to create a table with keywords. That is the beauty of Postgres.
T...
A weighted version of random.choice
...stribution)
Note that probability_distribution is a sequence in the same order of list_of_candidates. You can also use the keyword replace=False to change the behavior so that drawn items are not replaced.
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How can I select multiple columns from a subquery (in SQL Server) that should have one record (selec
...erally how to select multiple columns from a subquery:
SELECT
A.SalesOrderID,
A.OrderDate,
SQ.Max_Foo,
SQ.Max_Foo2
FROM
A
LEFT OUTER JOIN
(
SELECT
B.SalesOrderID,
MAX(B.Foo) AS Max_Foo,
MAX(B.Foo2) AS Max_Foo2
FROM
B
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Token Authentication vs. Cookies
...st example of a stateless protocol. But since most web apps need state, in order to hold the state between server and client, cookies are used such that the server can send a cookie in every response back to the client. This means the next request made from the client will include this cookie and wi...
FileNotFoundException while getting the InputStream object from HttpURLConnection
...ing to send a SOAP request header to a SOAP service. The issue was a wrong order in the code, I requested the input stream first before sending the XML body. In the code snipped below, the line InputStream in = conn.getInputStream(); came immediately after ByteArrayOutputStream out = new ByteArrayOu...