Learning Links

Window Functions (Hive)

https://www.cloudera.com/documentation/enterprise/5-11-x/topics/impala_analytic_functions.html

Window Functions (Spark DataFrame)

http://xinhstechblog.blogspot.com/2016/04/spark-window-functions-for-dataframes.html

Java 8 - loops

InputStream.range - call innerClass - effectively final contraint is no more

https://developer.ibm.com/technologies/java/articles/j-java8idioms3/ 

Mutables vs Parameters : The variable i, which we defined in our for loop, is a single variable that is mutated through each iteration of the loop. The variable i in the range example is a parameter to the lambda expression, so it’s a brand new variable in each iteration.