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Difference between null and empty (“”) Java String
... String("");
System.out.println(a==b);
That would output false because I allocated two different objects, and a and b point to different objects.
However, a.equals(b) in this case would return true, because equals for Strings will return true if and only if the argument String is not null and rep...
Is the primary key automatically indexed in MySQL?
...key is always indexed. This is the same for MyISAM and InnoDB, and is generally true for all storage engines that at all supports indices.
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SQL Query Where Field DOES NOT Contain $x
...hing a string, go for the LIKE operator (but this will be slow):
-- Finds all rows where a does not contain "text"
SELECT * FROM x WHERE x.a NOT LIKE '%text%';
If you restrict it so that the string you are searching for has to start with the given string, it can use indices (if there is an index ...
Why NSUserDefaults failed to save NSMutableDictionary in iOS?
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When do I need to release the loaded object? No alloc was called, so I would assume it is autorelased?
– Marc
Apr 16 '12 at 13:08
7
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SQL Client for Mac OS X that works with MS SQL Server [closed]
How can I connect to a remote SQL server using Mac OS X? I don't really need a GUI, but it would be nice to have for the color coding and resultset grid. I'd rather not have to use a VM.
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change html text from link with jquery
...ery's text() function. What it does is:
Get the combined text contents of all
matched elements.
The result is a
string that contains the combined text
contents of all matched elements. This
method works on both HTML and XML
documents. Cannot be used on input
elements. For input field text use the
v...
Start two instances of IntelliJ IDE
...edition).
When I have one instance started and I try to start another one, all that happens is that my started instance gets focus.
...
This Handler class should be static or leaks might occur: IncomingHandler
...e a reference to your Service object.
Handler objects for the same thread all share a common Looper object, which they post messages to and read from.
As messages contain target Handler, as long as there are messages with target handler in the message queue, the handler cannot be garbage collecte...
What does the caret (‘^’) mean in C++/CLI?
...s the managed equivalent of a * (pointer) which in C++/CLI terminology is called a 'handle' to a 'reference type' (since you can still have unmanaged pointers).
(Thanks to Aardvark for pointing out the better terminology.)
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Free space in a CMD shell
...unt of free diskspace of a disk or a folder in a CMD
without having to install some thirdparty applications?
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