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The latest binary required no changes for the GS Collections solutions branch which is nice.

 

The following branch has the solutions written with the Java 8 Streams library changes.

 

 

You can view the diff changes here:

 

 

The biggest surprise that required me to change some code was the result of groupBy not returning a List anymore.  I had to wrap the result in a Bag to compare it to the expected results in the tests.

 

There was also a problem I had where I was trying to reuse a stream, which I know is no longer allowed.

 

Other than that it was mostly replace Mapper with Function, and replace functions with function in the package names.