Erkan Şirin questions

Erkan Şirin answers

• connected host has failed to respond when I run `docker run hello-world` in docker
• how to filter out a null value from spark dataframe
• How can I build a CoordinateMatrix in Spark using a DataFrame?
• How to set heap memory in cassandra on docker
• Databricks display() function equivalent or alternative to Jupyter
• How to save a spark DataFrame as csv on disk?
• How to implement Kmeans evaluator in Spark ML