Posts – Page 3

Ramandeep Singh Nanda

Impala vs Hive vs RDBMS

Hive or Impala ?

Hive and Impala both support SQL operation, but the performance of Impala is far superior than that of Hive. Although now with Spark SQL engine and use of HiveContext the performance of hive queries is also significantly fast, impala still has a better performance. The reason that …

Ramandeep Singh Nanda

Java8: Decorating with Functional Programming and Generics

The Idea

Java 8 introduced functional programming support, this is a powerful feature which was missing from earlier versions. One of the benefits of functional programming is that it can be used to implement decorator pattern without the use of inheritance. One common requirement is to implement some kind of …

Ramandeep Singh Nanda

Retrofit 2.0 Conditional Authentication

You might run into a scenario where you might require conditional authentication with Retrofit 2.0.

This post provides an example of integration with the Lyft API. In case of the Lyft API, first we need to authenticate with and query the oauth/token endpoint to obtain the OAUTH token …

Ramandeep Singh Nanda

Why you should use square root of Gini Index

In this post I will explain why you should use square root of Gini index while building decision tree classification models. In decision tress, We know that at every node we need to choose a feature that provides the best split i.e. the feature that reduces the child nodes' …

Ramandeep Singh Nanda

ADF querying the policy store

Earlier, I had covered an example here, which showed how to dynamically create users and map the application roles to enterprise groups. In this post, the sample application is extended to show how you can query the application roles from the application stripe(application specific policies). To query the application …