JSON is a popular way to represent and transfer data. Creating JSON with JSON.simple (a Java library from Google) is very easy. JSON.simple also performs very well compared to other…
Below is a simple Hadoop MapReduce example. This example is a little different than the standard “Word Count” example in that it takes (tab) delimited text, and counts the occurrences…
A common algorithm question is “How to Reverse a Linked List”. Below the SimpleLinkedList (Java) class contains a simple example to follow. The class SimpleLinkedList contains one field, head, which…
Binary Search is a classic algorithm used to find an item in an ordered list/array of items. This list/array of items must be ordered for binary search to work. The…
Binary Search is a classic algorithm used to find an item in an ordered list/array of items. This list/array of items must be ordered for binary search to work. The…
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…
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…