From Functional Programming in Kotlin by Marco Vermeulen
This article discusses what functional programming is (and is not), using Kotlin for examples.
From JUnit in Action, Third Edition by Catalin Tudose
This article discusses widely-used mock frameworks such as EasyMock, JMock, and Mockito.
From Seriously Good Software by Marco Faella
This article delves into how thinking about what you want your code to do before you write it can lead to more reliable code.
From Spring Security in Action by Laurentiu Spilca
This article delves into five awkward things that Spring Security does, which might be giving you trouble in your projects.
From Java SE 11 Programmer I Certification Guide by Mala Gupta
This article explores how to write loops functionally in Kotlin.
From Spark in Action, Second Edition by Jean-Georges Perrin
This article discusses dependency injection and testing in Junit 5.
This article discusses some of the most important new additions in Junit 5.
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