Tag: kotlin

Logging in a Java library

Post author By Tõnis
Post date October 7, 2020

It can be useful to emit logs in a library. When doing so, one needs to consider when to emit, how to filter and who is responsible for printing/handling the logs. Correct logging should also be tested. When to log There are different reasons to emit a message, for instance on important events, undefined behaviour […]

Tags android, kotlin, library, logging, mockk, slf4j, testing

Kotlin

Kotlin: Concatenating nullable strings

Post author By Tõnis
Post date September 8, 2020

A null String is concatenated as “null” in Kotlin: What if the goal is to concatenate only if the second string is not null? There are a few options: if-else One of the solutions would be to check the null value with elvis(?:) operator: Now there is no “null”, but the whole “and second is” […]

Tags concatenation, kotlin, null, nullable, strings