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What is the difference between up-casting and down-casting with respect to class variable
What is the difference between up-casting and down-casting with respect to class variable?
10 Answers
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How to open a specific port such as 9090 in Google Compute Engine
I have 2 Google Compute Engine instances and I want to open port 9090 in both the instances. I think we need to add some firewall rules.
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Difference between \n and \r?
What’s the difference between \n (newline) and \r (carriage return)?
10 Answers
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What is the difference between sql and mysql [closed]
I am new to databases and I was wondering: What is the difference between SQL and MySQL ?
5 Answers
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How can I prevent SQL injection in PHP?
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Use prepared statements and parameterized queries. These are SQL statements that are sent to and parsed by the database server separately from any parameters. This way it is impossible for an attacker to inject malicious SQL.
You basically have two...
Visual Studio popup: “the operation could not be completed”
...rSolutionFolder\.vs\YourSolutionName\v15\.suo
The .vs folder is hidden, and the .suo files is a file without name, with just the .suo extension.
Explanation
The .suo file contain various information like the opened files list, and some preferences that are not saved in the solution file ...
Could not insert new outlet connection [duplicate]
...insert new outlet connection: Could not find any information for the class and not showing any class named "ViewController"
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Why does GCC generate 15-20% faster code if I optimize for size instead of speed?
I first noticed in 2009 that GCC (at least on my projects and on my machines) have the tendency to generate noticeably faster code if I optimize for size ( -Os ) instead of speed ( -O2 or -O3 ), and I have been wondering ever since why.
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What's the difference between session.persist() and session.save() in Hibernate?
...red.
save() does not guarantee the same, it
returns an identifier, and if an
INSERT has to be executed to get the
identifier (e.g. "identity" generator,
not "sequence"), this INSERT happens
immediately, no matter if you are
inside or outside of a transaction.
This is not good in ...
What is LDAP used for?
I know that LDAP is used to provide some information and to help facilitate authorization.
16 Answers
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