How to Extract Nested JSON Data in Spark
JSON is a very common way to store data. But JSON can get messy and parsing it can get tricky. Here are a few examples of parsing nested data structures…
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January 25, 2021
How to Read / Write JSON in Spark
Needing to read and write JSON data is a common big data task. Thankfully this is very easy to do in Spark using Spark SQL DataFrames. Spark SQL can automatically…
January 25, 2021
How to Exclude Fields using Gson
There are a lot of great Java libraries for working with JSON. One of these is Google’s Gson, which has the goal of providing simple toJson() and fromJson() methods to…
January 25, 2021
Creating JSON with Gson
There are a lot of great Java libraries for working with JSON. One of these is Google’s Gson, which has the goal of providing simple toJson() and fromJson() methods to…
January 25, 2021
Java Binary Search Tree Implementation
The Binary Search Tree is commonly used data structure in Computer Science. Below is a complete binary search tree implementation, including the standard methods used to find, insert, and delete…
January 25, 2021
How to Convert Timestamp String to Unix Time (Epoch) in Java
Unix time (AKA POSIX time or Epoch time) is defined as the number of seconds that have elapsed since January 1st 1970. Having time in a numerical format can be…
January 25, 2021
Simple Apache Avro Example using Java
Apache Avro is a popular data serialization system that relies on schemas. The official Avro documentation can be found here: http://avro.apache.org/docs/current/. This post walks through an example of serializing and…
January 25, 2021