Ever run into the situation where you had to perform some operation based on the value from select field? How did you handle it? Maybe multiple case / switch statements? Or if you are lucky enough and code in language with good support for metaprogramming like Ruby you can write some magic code like this one:
which in fact can be treated as hidden case statement, but much easier to handle.
Are there any cleaner solutions to such problems which would be more readable? Fortunately, the answer is yes - some frameworks like Ember give possibility to use cool patterns that are not possible in other cases.