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Are interfaces a valid substitute for utility classes in Java 8? [duplicate]

java,class,interface,java-8,utility-method
This question already has an answer here: Java 8: Interface with static methods instead of static util class 4 answers For the past decade or so, I've been using the pattern below for my Java utility classes. The class contains only static methods and fields, is declared final so...

Is there a built in Kotlin method to apply void function to value?

kotlin,utility-method
I wrote this method to apply a void function to a value and return the value. public inline fun <T> T.apply(f: (T) -> Unit): T { f(this) return this } This is useful in reducing something like this: return values.map { var other = it.toOther() doStuff(other) return other } To...