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Scala: What is the difference between Traversable and Iterable traits in Scala collections?
...le do not keep any iteration state. It's the Iterator created and returned by the Iterable that keeps the state.
– Graham Lea
Jul 12 '14 at 11:13
2
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Mediator Vs Observer Object-Oriented Design Patterns
...capsulates how a set of objects interact. Mediator promotes loose coupling by keeping objects from referring to each other explicitly, and it lets you vary their interaction independently.
Source: dofactory
Example:
The observer pattern:
Class A, can have zero or more observers of type O registe...
How do I obtain a Query Execution Plan in SQL Server?
...ght find it helpful to be able to obtain a plan via SQL Server Profiler or by inspecting the plan cache.
Method 1 - Using SQL Server Management Studio
SQL Server comes with a couple of neat features that make it very easy to capture an execution plan, simply make sure that the "Include Actual Exec...
How SignalR works internally?
...ame
Long polling
SignalR tries to choose the "best" connection supported by server and client (you can also force it to use a specific transport).
That's the high level. If you want to see how each transport is implemented, you can look at the source code.
There's also client code for each tran...
What are “named tuples” in Python?
...king a tuple class. With that class we can create tuples that are callable by name also.
import collections
#Create a namedtuple class with names "a" "b" "c"
Row = collections.namedtuple("Row", ["a", "b", "c"])
row = Row(a=1,b=2,c=3) #Make a namedtuple from the Row class we created
print row ...
How can I obfuscate (protect) JavaScript? [closed]
... YUI Compressor. It's a very popular tool, built, enhanced and maintained by the Yahoo UI team.
You may also use:
Google Closure Compiler
UglifyJS
UPDATE: This question was originally asked more than 10 years ago, and YUI is no longer maintained. Google Closure Compiler is still in use, and Ug...
How to detect Windows 64-bit platform with .NET?
... first check if running in a 64-bit process (I think in .NET you can do so by checking IntPtr.Size), and if you are running in a 32-bit process, you still have to call the Win API function IsWow64Process. If this returns true, you are running in a 32-bit process on 64-bit Windows.
Microsoft's Raymon...
How to use Comparator in Java to sort
...
@Esko: comparison-by-subtraction "trick" is broken for general int stackoverflow.com/questions/2728793/…
– polygenelubricants
May 15 '10 at 7:19
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Is XML case-sensitive?
...ation is a standalone artifact in beta state, and XSD 1.1 is not supported by the JDK, not even by the most recent one 1.8. It isn't even planned for JDK 1.9 as far as I know. You cannot use advanced XML technologies like JAXB based on XSD 1.1 built-in from the JDK this way.
– ...
How to restore to a different database in sql server?
...m the toolbar, click the Activity Monitor button.
Click processes. Filter by the database you want to restore. Kill all running processes by right clicking on each process and selecting "kill process".
Right click on the database you wish to restore, and select Tasks-->Restore-->From Databas...