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Collections.emptyMap() vs new HashMap()
...need to explicitly type out the generic type of the collection - it's generally just inferred from the context of the method call.
They're more efficient because they don't bother creating new objects; they just re-use an existing empty and immutable object. This effect is generally very minor, b...
How to use setArguments() and getArguments() methods in Fragments?
...
You have a method called getArguments() that belongs to Fragment class.
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How can I easily view the contents of a datatable or dataview in the immediate window
... four standard visualizers. These are the text, HTML, and XML visualizers, all of which work on string objects, and the dataset visualizer, which works for DataSet, DataView, and DataTable objects.
To use it, break into your code, mouse over your DataSet, expand the quick watch, view the Tables, ex...
C# string reference type?
...iables pointing to the string. And because any operations with strings actually create a new object, we make our local copy to point to the new string. But the original test variable is not changed.
The suggested solutions to put ref in the function declaration and in the invocation work because we...
Using module 'subprocess' with timeout
...that contains command's merged stdout, stderr data.
check_output raises CalledProcessError on non-zero exit status as specified in the question's text unlike proc.communicate() method.
I've removed shell=True because it is often used unnecessarily. You can always add it back if cmd indeed requir...
Select values from XML field in SQL Server 2008
...wered May 22 '09 at 18:39
LarsenalLarsenal
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Python: Using .format() on a Unicode-escaped string
...gt; print s
≥
>>> print "{0}".format(s)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
UnicodeEncodeError: 'ascii' codec can't encode character u'\u2265' in position 0: ordinal not in range(128)
>>> print u"{0}".format(s)
≥
>>>
...
differences between 2 JUnit Assert classes
...d junit.framework.Assert itself and your test class gained the ability to call the assert methods this way.
Since version 4 of JUnit, the framework uses Annotations for marking tests. So you no longer need to extend TestCase. But that means, the assert methods aren't available. But you can make a s...
What is N-Tier architecture?
...sentation, the application
processing and the data management are
logically separate processes. For
example, an application that uses
middleware to service data requests
between a user and a database employs
multi-tier architecture. The most
widespread use of "multi-tier
architecture...
How can I define a composite primary key in SQL?
...(from that table). If a primary key consists of two or more columns it is called a composite primary key. It is defined as follows:
CREATE TABLE voting (
QuestionID NUMERIC,
MemberID NUMERIC,
PRIMARY KEY (QuestionID, MemberID)
);
The pair (QuestionID,MemberID) must then be unique for the ta...