What are defaulted methods and how do I use them properly? [duplicate]

What are defaulted methods and how do I use them properly? [duplicate]

References

Reference NO 1

http://stackoverflow.com/questions/13655198/what-are-defaulted-methods-and-how-do-i-use-them-properly

Reference NO 2

http://en.wikibooks.org/wiki/C%2B%2B_Programming/Classes/Member_Functions

Reference NO 3

http://developer.apple.com/library/ios/documentation/cocoa/conceptual/ProgrammingWithObjectiveC/EncapsulatingData/EncapsulatingData.html

Reference NO 4

http://math.hws.edu/javanotes/c5/s1.html

Reference NO 5

http://msdn.microsoft.com/en-us/library/system.object.gethashcode.aspx

Reference NO 6

http://www.ruby-doc.org/docs/ProgrammingRuby/html/tut_classes.html

Reference NO 7

http://en.wikipedia.org/wiki/Method_(computer_programming)

Reference NO 8

http://findbugs.sourceforge.net/bugDescriptions.html