4/6/2023 0 Comments Null safe kotlinKemudian isikan codingan seperti berikut. Supaya lebih memahami, silahkan buka project yang dulu pernah anda buat, lalu buatlah sebuah file kotlin di dalam package dengan nama NullSafety. Kotlin allows the receiver type of extension functions to be nullable. is not null safe, when performing a method on a null value. Pada kotlin, anda dapat membedakan antara variabel yang boleh null dan yang tidak boleh null. import .NullSafe._Ĭase class Tree(left: Tree ? = null, right: Tree ? = null, value: String ? = null)Ī normal. You can use ? annotation to type a nullable value. NullSafe is a part of Dsl.scala project, requiring Dsl.scala’s compiler plug-in: libraryDependencies += "" %% "keywords-nullsafe" % "latest.release"ĪddCompilerPlugin("" %% "compilerplugins-bangnotation" % "latest.release") This NullSafe library aims to handle null references in these use cases. Unfortunately, JavaSE API and other Java libraries, which may produce null references, are still used in Scala development. Alternatively, Option is preferred in Scala. Null references are known as The Billion Dollar Mistake. Recently I published NullSafe, a library to provide Kotlin / Groovy flavored null-safe ? operator.
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