As a language that aims for safety and performance, Rust provides a powerful data structure called HashSet that provides a fast and efficient way to store and retrieve unique values. HashSet is optimized for scenarios where you need to check for the presence of a value and avoid duplicates, making it a popular choice among… Read More How to apply function that returns Result to each element of HashSet in Rust
Although I’m relatively inexperienced in Java, I’ve been coding with Java long enough to know that this isn’t normal behavior. Basically, the program is printing the text just fine, but the ‘rand’ variable is printing a conglomeration of numbers, characters, and letters, which are shown below. I tried initializing the ‘rand’ variable into a nextInt()… Read More Why does the Random method produce the name of the method when being printed? [Java]
I am trying to make a simple program that let you add just two numbers (just learning basics) and i just "fell" to this problem: GODCalculator.kt: (18, 15):Too many arguments for public inline fun println(): Unit defined in kotlin.io I tried to find some anwsers on internet, but didn’t find excatly what i wanted to…… Read More Too many arguments for public inline fun println(): Unit defined in kotlin.io
When I call the method with 142.14, I don’t get any errors, but nothing prints to the console at all. When I send 142, it works as intended. Why is this? This code is in Java and I need to add more details to ask this question so here I am adding more details. public… Read More Java method working with an int but not a double
I’m just starting to learn Java and I just got to the if-else-else if statements section on CodeAcademy. I tried using the if else statement in a method, but I’m not receiving the variable value when I call it, only the if-else statement. I’m guessing this is a very small mistake. (This is my first… Read More if-else-else if statements in Java (codecademy)
For example i have dao with 20 methods. type UserDao interface { GetUser() (User, error) GetUsers() ([]User, error) … } And i want create mock for tests and use only one method. type UserDaoMock struct { } fucn (UserDaoMock) GetUser() (User, error) { return User{} } There is a way to don’t implements other methods… Read More Go use struct as interface without implementing all methods
I need a regex that checks whether a string contains the following characters ‘ " | \ / <> ; "Team’s<>".contains("/[\"’\\/\\\\<>;|]/;") val regex = Regex(pattern = "’.*’.*\".*\\|.*\\\\.*/.*<>", options = setOf(RegexOption.IGNORE_CASE)) regex.matches(input) >Solution : You could include all the characters you’re looking for in a simple character class and escape them. [\’\"\|\\\/\<\>;] If the regex finds… Read More Check whether the string contains special characters Kotlin
I’m trying to build a factory that constructs implementations of a given interface. To make adding new implementations of that interface easier, I’m trying to have the various implementations auto-register their constructors with the factory at init() time, but I can’t seem to figure out if it’s possible to make something like this. Here’s a… Read More Function types that return interfaces in go
Here is my code, pls tell me why multithreading may not work for me. When I run the code, I get the same result with one thread, with two and three I need to make it so that when I run a pod on a different number of threads, the speed increases, because I use… Read More how to make multithreading work in my code?
I have a Sorting.java file, with the following structure: public class Sorting { public static <T> void mergeSort(T[] arr, Comparator<T> comparator) { (…) } } My goal is to test the mergeSort() method in a separate Driver.java file. To that effect, here is what I included in that driver file: import java.util.Comparator; import java.io.*; import… Read More Java Error: Comparator is not abstract and does not override abstract method compare(Object,Object) in Comparator