I have a small program that iterates over an array of strings and then prints either true or false depending whether the string from array is included ...
I have a small program that iterates over an array of strings and then prints either true or false depending whether the string from array is included ...
I have a collection of Java objects where I want to run a single function across multiple values I might find in some of the object's member variables ...
**->**Anonymous inner class this key word always refers current class inside local variable. **->**Lambda expression refers current class inst ...
I want to write a Function (i.e Functional interface Function) that accepts a Function<Node, T> and returns a Function<NodeList, Set<T> ...
I have the following expression written in a standard java-style with "if". I want to rewrite it kotlin-style. I got something like this: And it ...
I am using Java in my project. I see code like below and not able to understand the flow. It identifies the count of unique name from list of perso ...
I'd like to use something like this to check some conditions, but the problem is that I need to know which condition failed and log the exception, thi ...
We can write functional interfaces in Kotlin like this - function-interfaces How can we write Jetpack Composable function in same way? Below code i ...
Why does the flatMap operation require a function which returns Stream instead of a function that returns a Collection? Any particular reason it force ...
Java can correctly deduce SAM types and allows me to pass a lambda as a substitute to their implementation, but the same mechanism fails when I try to ...
I saw many times that using the functional API in java is really verbose and error-prone when we have to deal with checked exceptions. E.g: it's real ...
I have a list of objects and each element of that list is an object that contains several BigDecimal parameters. I'm generating a new Amount object ba ...
I have the following generic method for transforming a page object into a Slice: I would then use this as follows: However, I would like to now ...
I would like to implement runtime polymorphism using Enum and BiFunction. Below are my sample code snippet. So, at runtime I would like to pass Dog ...
I am creating beans that are implementations of a functional interface, for example: @FunctionalInterface public interface FooRunnable { abstract ...
In java, you can use implementations of interfaces like this: import org.springframework.data.mongodb.core.query.Query; @FunctionalInterface public ...
I'm trying to use java.util.Function object as an input to a library class. Function<? extends MyEntity, List> mapper; public MyLibraryClass(F ...
Functional interfaces work well when you want to inject a function as an interface, example: However if I try to return a function when the return ...
I have Decorator interface: fun interface Decorator { decorate(text: String): String } And I want to implement it for class Padded by lambda li ...
The third line will not compile, because The target type of this expression must be a functional interface: Why not? What's the difference between ...