Then this paper might be of great help to you http://lampwww.epfl.ch/~imaier/pub/DeprecatingObserversTR2010.pdf http://lampwww.epfl.ch/~imaier/pub/DeprecatingO

Then this paper might be of great help to you http://lampwww.epfl.ch/~imaier/pub/DeprecatingObserversTR2010.pdf http://lampwww.epfl.ch/~imaier/pub/DeprecatingObserversTR201... It's straightly viewn from an implementor's perspective in my opinion. Tl:Dr.: The observer-pattern is bad and encourages callback-hell, therefore a Data-Flow DSL is implemented to control the order of evaluation. It's kind of showing the implementation of an IO-Monad.