grv questions

• efficiently get joined and not joined data of a dataframe against other dataframe
• Static variable initialization using new gives a code hazard
• Add pattern to anyURI data type in xsd
• Difference between + operator and append function for string class object in c++?
• 2 C# classes contain each other as a member
• How to check if some text is present on a web page using selenium 2?
• How does concatenation of two string literals work?

grv answers