Getting namespace prefix of an org

Question

I have a dev org, in which I have got a namespace prefix. In apex, I want to get this namespace prefix as string. Is there any straight way or I have to describe some object?

Answer 1

Query for it, using a class that you know will be there:

ApexClass myClass = [
    select NamespacePrefix
    from ApexClass
    where Name = 'SomeClassNameHere'
];

Answer 2

just hard code the prefix instead. The namespace in your sandbox is a constant, and won't change when you deploy your code. you'll be burning up a soql query everytime that class/trigger runs...