Scala 2.10.0 Introduction of Try

One of my favorite things about Scala 2.10 that I’ve been using since this summer is encapsulated in Try.scala. You could remove lines and lines of try catch blocks and horrible (or no) error handling strategies that I have seen strewn around applications over the years. Try gives you a clean, very often one-line, function with error handling built in that is incredibly flexible for the succinctness you can glean from it.

The docs describe it as representing “a computation that may either result in an exception or return a success value. It is analogous to the Either type but encodes common idioms for handling exceptional cases (such as rescue/ensure which is analogous to try/finally)”.

Looking at this simplistically, here are a few samples, the first of which does a very java-like pattern with the try catch block riddled through java code, while the Risky class uses simple one line handling using scala.util.Try.

If you run this you would see the following where the ones showing a scala.util.Success and/or a value result from the fallback:
[info] javaLike [1]
[info] one [None]
[info] two [false]
[info] three [1]
[info] four [1]
[info] five [Failure(java.lang.ArithmeticException: / by zero)]
[info] six [Success(1)]
[info] seven [Success(1)]
[info] eight [Success(1)]


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