Loading Data from a Database into Spark
One of the great features of Spark is the variety of data sources it can read from. Loading data from a database into Spark using JDBC requires 3 major steps.…
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January 25, 2021
The Difference between GUID and UUID
GUID (Global Unique Identifier) and UUID (Universally Unique Identifier) are different implementations of the same idea. GUIDs and UUIDs are used as IDs (to identify) unique objects or records. These…
January 25, 2021
How to Generate a UUID in Java
UUID stands for Universally Unique Identifier. UUIDs are used as IDs (to identify) unique objects or records. An easy way to generate UUIDs in Java is to use the java.util.UUID…
January 25, 2021
What is a UUID?
UUID stands for Universally Unique Identifier. UUIDs are used as IDs (to identify) unique objects or records. These are very common in a big data environment where coordinating unique IDs…
January 25, 2021
How to Sum Values in Awk
Knowing how to sum values in Awk can be extremely useful when working with data. Fortunately, it is very easy. Using variables in Awk will feel different than in other…
January 25, 2021
How to Create a Max Heap using an Array in Java
A Heap/Binary Heap is a data structure that takes the form of Binary Tree. Heaps are commonly used to implement priority queues (check out the PriorityQueue class in Java). Priority…
January 25, 2021
How to Create a Hash Table in Java (Chaining Example)
Knowing how to create a hash table is helpful when using built-in HashTable and HashMap implementations in various languages. Questions about hash tables are commonly asked in programming interviews, and…
January 25, 2021