Use Kotlin in a Scala Project

Nov 27, 2019

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

Methods of a Kotlin object can be called in a Scala project by KotlinObject.INSTANCE.methodToCall()
You might need to provide the Kotlin standard library kotlin-stdlib.jar in order to run …

Convert Between Byte Array and String in Java

Nov 27, 2019

Convert byte[] array to String – Convert String to byte[] array in Java

Round/Format Numbers in Java

Nov 27, 2019

System.out.printf¶

Format String in Java

Nov 27, 2019

StringSubstitutor ¶

OOP in Kotlin

Nov 26, 2019

References¶

https://kotlinlang.org/docs/reference/classes.html

https://www.baeldung.com/kotlin-constructors

Read/Write Parquet Files in Spark

Nov 26, 2019

DataFrameReader APIs

DataFrameWriter APIs

https://spark.apache.org/docs/latest/sql-programming-guide.html#data-sources

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