Retrieving subclass type in base class?

I am attempting to use the Microsoft enterprise Validation methods to perform validation in my entities.In my base class I have the following method:

What's the difference between -> result=$(ls -l) (or) -> result=`ls -l`

I\'v run both commands and they both seem to do the same thing, is this true or is there something happening I\'m not seeing?

Flex - Show text at specific video points

I\'m using the VideoPlayer component in flex 4 to display a clip. I have about 3 or 4 notes that I want to appear at specific points of the video, sort of like caption but not quite. I\'m trying to fi

Any detached/independent Session Library in PHP using Flat File or MySQL?

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Data Structure for Storing Ranges

I am wondering if anyone knows of a data structure which would efficiently handle the following situation:

Simplest way to implement a database for a Song list type program (Using Visual C++)

Working on a school project, the program is supposed to read from a text file that has a record about a song in every line, fields separated by \";\".

Script level login to Grails app using Acegi security

Scenario: I have a Grails app that uses Acegi security for authentication.I\'m implementing a REST service endpoint in the app and want to be able to GET and POST to / from the service endpoint using

湖北适合春季游玩的地方有哪些？？

海边看日落应该注意什么？？

jQuery slide down from first comment to full page

I have a list of 10 comments on a page. Their heights are not known because it depends on the content of the comments.