• Tools for Causal Inference

• By Andrew Kelleher, Adam Kelleher Feb 18, 2019

It’s important to balance stakeholder expectations when you scope a project, and good causal inference can take time. Data scientists Andrew and Adam Kelleher help you develop the tools you need to do causal inference.

• Kotlin Interoperability with Java

• By Peter Sommerhoff Dec 24, 2018

Discusses common issues, solutions, and best practices for interoperability with Java.

• Reshaping Data with tidyr

• By Michael Freeman, Joel Ross Nov 28, 2018

This chapter describes how you can use the tidyr (“tidy-er”) package to effectively transform your data into an appropriate shape for analysis and visualization.

• How to Write Secure Programs

• By Matt Bishop Nov 26, 2018

Well-known educator Matt Bishop discusses informal techniques for writing programs that enforce security policies.

• When to Start Refactoring Code—and When to Stop

• By Martin Fowler, Kent Beck Nov 19, 2018

Kent Beck helps Martin Fowler describe how to find bad smells in code and how to clean them up with refactorings.