How to optimize method that returns the first non empty value returned of the checkN() methods and prevent the rest method calls and isEmpty() calls: #1 I thought of using stream filter and return first that has value, but it requires to call each check: SOLVED as M A suggested, finalized solution for me was: Answer Instead of constructing a
Let’s say we got this class: Is it somehow possible to take the output of the getValue() method and increment it, or do any math with it, but by using the reference operator and not a lambda? What I am looking to achieve is something like this, but with reference operators: If I write something like this, I will get
I had a few questions that I’m having trouble finding the answer to, at least in Java. I saw a Class definition in a tutorial where lambdas were being used similar to methods. So I’m curious as to if there is any benefit apart from concise code and style preference. Example: Is this a valid class definition? Is this a
I want to try to use lambda functions (which I do not understand well) so I can learn more about them. I have an assignment on trees that has us making a family tree class. children is a set of all of the children nodes to this node. Also as a side question, does this usage of AtomicInteger work similarly
I am using the jdbi library like so: This try catch pattern is repeated a few times, with various different queries passed to the jdbi.withHandle method. Another example: The jdbi.withHandle method has this signature: I am trying to find a way to reduce the duplication around the try-catch, so that I can use something like this instead: i.e. the handleTransientExceptions
Using Java, I am trying to find a clean way to accumulate multiple different value in a series of lambda. For a concrete example see this following piece of JS (typescript) code: I am not sure if there are existing Java Stream APIs for accumulate such a result. Maybe it’s not really possible and i should look into another JVM
I need to filter and modify the values of the filtered object. The logic that must be filtered is given below. I have tried it like this. But how can we set the value of isUpdated = true using java 8? Answer Base on the logic given, findFirst should be used as you stop after the first instance is found.
I’m new to using Kotlin, so far seems amazing, however I don’t quite understand what’s going on here: So, here’s what I do understand: I am creating a class that contains a method which receives a MyObjectClass When I call onClick(someObject) I am actually indicating to call clickListener(someObject.longField) I should use this callback method like this: Unit is a Kotlin
I’m trying to understand lambda formatting in Java and could really use some help converting this function into a standard function to see how this works: Answer Start with the code to create an anonymous Callback object: Then paste in the right hand side of the -> lambda operator as call()’s method body. The only modification needed is to make
I am going through Java 8 Feature and using Jshell to explore it. I tried to run the below command: But it failed with the below error: I didn’t get exactly what’s the issue Consumer takes one argument and return nothing. Same I am doing here by passing 1 arg str and printing. So what’s the issue with this syntax.