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Spark dataframe Examples: Reading and Writing Dataframes 23 Feb 2020 spark scala

Some examples on how to read and write spark dataframes from sources such as S3 and databricks file systems. Read More ›

Spark SQL Date/Datetime Function Examples 09 Nov 2019 spark scala

Examples on how to use date and datetime functions for commonly used transformations in spark sql dataframes. Read More ›

Scala Fold Examples 10 Oct 2019 scala

Examples and reference for Scala fold method. Read More ›

Spark Dataframe Examples: Window Functions 22 Aug 2019 spark dataframes scala

Examples on how to do common operations using window functions in apache spark dataframes. Examples using the Spark Scala API. Read More ›

Spark Dataframe Examples: Pivot and Unpivot Data 10 Aug 2019 spark scala

Pivoting and unpivoting are very commonly-used data transformation operations. Use them when you want to switch from a row-based to a column-based view and vice-versa. Read More ›

Jupyter Notebook Kernels: How to Add, Change, Remove 28 Jul 2019 jupyter-notebooks scala spark

Add, remove and change Kernels to use with Jupyter notebook Read More ›

Corda Framework Overview + Examples 07 Apr 2018 dlt jvm

Overview of the main concepts of the Corda framework for building decentralized applications based on Distributed Ledger Technology (DLT). Read More ›

Scala Testing with Scalatest: Reference and Examples 06 Jul 2017 testing scala

Simple examples using ScalaTest to test your Scala projects. Full introduction and examples of all major testing styles supported by this framework. Read More ›

Akka-http Common Operations: Reference + Examples 03 Nov 2016 akka-http akka wip

A couple of things I find myself doing very often when I use akka-http. I believe these may be useful for others too. Read More ›

Publishing an SBT Project onto Bintray: an Example 20 Aug 2016 sbt bintray

A quick example explaining everything you need to do to package an SBT project and publish the binary JAR to bintray, where it can be made available for others too! Read More ›

Add a Github Project as a Dependency in SBT 13 Aug 2016 sbt

Small example on how to quickly add a project you found on github to your own project as a dependency. Read More ›

Packaging an Akka-http Application using SBT and Docker: Simple Example 29 Jun 2016 docker akka-http sbt

A simple example displaying common akka-http use cases and a couple of tips and hints to guide you through packaging a full app as a Docker container, so that you can deploy it anywhere you want. Read More ›

Migrating a Project from Spray to Akka-http: General Tips and Reference 29 May 2016 akka-http spray scala

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Troublesshooting Akka: ClassNotFoundException: akka.event.slf4j.Slf4jLoggingFilter 19 May 2016 akka slf4j scala

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Java.time API: Examples and Reference 01 Apr 2016 java 8 datetime scala

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Update Java to JDK 8 on Amazon Elastic MapReduce 22 Mar 2016 emr spark java 8

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Comparing Interactive Solutions for Running Scala and Spark: Zeppelin, Spark-notebook and Jupyter-scala 07 Mar 2016 notebook interactive scala spark zeppelin

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Json4s Examples: Common Basic Operations using Jackson as Backend 29 Feb 2016 json scala json4s

Json4s is one of the best libraries for manipulating json in Scala. Here are some examples and common use cases you may have come across and some you perhaps haven't. Read More ›

Fully Customized Json Validators for the Play 2 Framework: Explanation and Example 05 Jan 2016 play 2 json

Play 2 Allows a lot of flexibility for defining custom rules for JSON validation but if you want full control over how JSON is validated against a case class (including conditions that depend on more than one attribute and custom error messages) you need to write custom readers for your classes. Read More ›

JVM Performance Monitoring 101: Commonly Used Open Source Tools + Examples 28 Dec 2015 jvm java scala java 8 wip

Performance monitoring is an essential part of the work of whoever works on the JVM using not just java but other JVM languages such as Scala, Groovy and Clojure. Here are some of the most widely-used open-source tools with examples, so that you can do your work more easily. Read More ›

Java 8 Timezones: Examples in Scala 23 Dec 2015 java 8 datetime scala

Many Scala examples of the new Java 8 `java.time` API, focusing on ways to deal with and encode Timezone information in your objects. Read More ›

Spark DataFrame UDFs: Scala Examples 11 Nov 2015 spark udf scala

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Creating Scala Fat Jars for Spark on SBT with sbt-assembly Plugin 18 Sep 2015 sbt hadoop spark sbt-assembly

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Spark-submit: Examples and Reference 13 Sep 2015 spark scala

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Deadbolt 2 for the Play Framework in Scala: Defining a custom Handler 02 Sep 2015 deadbolt play play 2 authorization

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Slick 3 Reference and Examples 18 Jun 2015 slick 3 slick scala orm frm

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