Using this guide : https://doc.akka.io/docs/akka/current/stream/operators/Source-or-Flow/splitAfter.html I’m attempting to calculate the average of a number of attributes within a List. More specifically, using the code below I’m attempting to calculate the average value for a an actor source that…
Tag: java
How to Create a List of Different Enum Classes
I’d like to create a list of different Enum classes and be able to access the values of these enums in the list. For instance, consider two Enums: I’d like to construct a list of Enum1 and Enum2 such that I can print the values of Enum1 and Enum2. It would look something like this, but this obviou…
Create directory without manage all files permission
How can i create directory in ( /storage/emulated/0/ ) without manage all files permission. This is my code : On android 11 its not working because it need manage all files permission. Answer From SDK 30 you can not access all file system without using MANAGE_EXTERNAL_STORAGE. If your app is in following cate…
why is there a stack overflow error in a recursive solution to finding the factorials of a number?
I’m solving LeetCode #172: Given an integer n, return the number of trailing zeroes in n! Constraints: 0 <= n <= 104 My code finds the answer of n! first and then counts the number of trailing zeroes. However, running the code throws a stack overflow exception, and I can’t for the life of me…
How to change this JavaFX into using a ControllerFactory
I have looked into using ControllerFactory a lot, to allow this code to be instantiated from a database, and have cross-controller compatibility. But with my original setup different from others I found online, I found it extremely hard to follow along, and use what would fit into my program from theirs. Any …
java.lang.ExceptionInInitializerError when running flutter release mode
My flutter app works fine in debug mode. But, when I run it with flutter run –release I am getting the following error. I’ve tried some ways like upgrading gradle, upgrading some dependencies to latest versions. But still it’s not solved. Can you give any ideas on how to solve this? Answer I…
Quarkus with hibernate found [bpchar (Types#CHAR)], but expecting [char (Types#VARCHAR)]
Hello i’m trying to learn Quarkus with Hibernate but i’ve ran into an issue the schema-validation. The error: 2021-12-29 16:05:14,915 ERROR [io.qua.hib.orm.run.sch.SchemaManagementIntegrator] (Hibernate post-boot validation thread for ) Failed to validate Schema: Schema-validation: wrong column ty…
How to control child-thread lifecycle and synchonize it with main-thread?
I am trying to create another thread that processes data while main thread doing some more. Main thread must wait till another thread finishes doStuff with all elements. And my implementation is pretty straight forward. Please, take a look at processData and tell me is there some more Java-like way to do it? …
Integrating regex in selenium xpath?
Hello I just start using selenium with java framework : I have this case : I need to count all the check boxes in my view which contains multiple pages (1,2,3) and in each web page i have a bunch of check boxes with the same xpath with different number see the exemple below: xpath fir the second checkbox in
Where is the super reference in a Java instance method’s stack frame?
I read Bill Venner’s excellent Inside the Java Virtual Machine book, which, in Chapter 5 explores in detail, among other things, the composition of a JVM’s stack frame. (This chapter from the book also happens to be officially published here: https://www.artima.com/insidejvm/ed2/jvm8.html) Apart f…