Questions tagged [generics]
Generic programming is a style of computer programming in which algorithms are written in terms of to-be-specified-later types that are then instantiated when needed for specific types provided as parameters.
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Generic type data storage
We have a module which can be used by user to store and load value of variables. Every variable has an index associated with it (in the shown code cample this is ommitted and index is instead the data ...
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Generic matrix library in Java
I have this repository. The most important source files follow.
com.github.coderodde.math.linear.matrix.AbstractMatrix.java:
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Using Ada's access type and generics to solve an ODE
This post is linked to Ada: Convert float to decimal
I have produced Ada codes which uses the Euler algorithm Euler method to solve an ordinary differential equation. The codes given below are working ...
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Instance specific code generation
Disclaimer: I've asked this question before on Stack overflow and got a response that this place would be a better fit so I am copy pasting the question here.
I've come up with two different ...
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Python Module for representation, calculus and rich comparisons between temperature scale instances
ToTemp is a temperature conversion package with Celsius, Delisle, Fahrenheit, Kelvin, Rankine, Réaumur, Newton and Rømer scales. With a documentation and already in PyPI.
The source code for the main ...
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Generic[type[Enum], Protocol[DataFrame]] Dataset with mapped to enum types
Below is my solution for managing multiple DataFrames, in an abstract enough way that it may apply to objects outside of a pandas.DataFrame hence the ...
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A predicated version of std::for_each
For reasons, I want to implement a predicated version of std::for_each. I know that, in C++20, this is made somewhat redundant or less useful, as we can use ...
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@lazylist - Converts a Python Generator to a List without evaluating every element
Inspired by a blog I read, I made a LazyList class that can wrap an iterable (list, generator etc.) and turn it into a ...
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Generic Integer Square Root
I have implemented an integer square root function that is branch-free and runs in constant time, using the first variant found in this answer as a base. All possible values for the types ...
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Generic Interpolation for many types in C#
I made a generic interpolator for Unity objects, but the way it functions makes me question if there's a better way to approach this problem.
I want the logic inside of the ...
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Small typesafe assertion library, is()
I need to write a function with the following requirements (Programming TypeScript book by B. Cherny, Chapter 4, exercise 5):
Implement a small typesafe assertion library, ...
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rust: idiomatic use of generics when using a filetype-dependent writer
Simplified from https://github.com/132nd-vWing/tacview-splitter.
External dependencies: zip crate
The code would do the following:
read a file from disk (...
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C++ Generic Callback class with removable listeners by unique id
I'm quite new to the STL.
Does this make sense? Is there a better way of removing the listeners instead of using shared_ptr while keeping the code short and simple? Is there something in the STL to ...
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Correct usage of Java Generics for a simple cache holding objects of any particular type that contain an identifier of any particular type
The Stack Overflow question, I'm trying to create an inMemory database using Collections and generics, presents some code that attempts to use Java Generics for an in-memory cache of objects of any ...
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Singleton generic implementation of simple LinkedList
I would like to ask if the implementation is ok, and what I can improve.
Although I'm not sure if the Singleton is working properly.
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A database trait in Rust. How can I make all these generic parameters easier to use?
I am trying to hide the implementation details of accessing a Postgres database. To do this, I want to create "database" and "transaction" traits for use in a repository struct. ...
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Suggestions for improvement for generic array and map functions in Go 1.18
Yesterday I build some generic functions for the new official Golang 1.18 release. What do you think about it and what could be added and improved?
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MongoDB abstraction in Go with generics
I'm working on a new project with go. So I figured I would give this new feature a run (it's fun!). Although, I'm not sure I'm implementing this the way it's suposed to be.
I've read the following ...
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Making a generic web API controller when using multiple tables with similar fields
I have been trying to refactor my code since I found I've been doing a lot of copying and pasting to implement the logic of the web API controllers. Here's how the controllers looked like before ...
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JSON save system for Unity
I made a Json save system for my Unity game. I wanted to make something as generic as possible to keep the code DRY. I couldn't find much information online on how to make something generic.
Could you ...
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Generic Pairing Heap Performance
I have made a generic pairing heap library in C. Pairing heaps are one of the several heap variants with better asymptotic running times than standard binary heaps (others include Fibonacci heaps and ...
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Build the Mountain Car Environment using coupled inheritance and type annotations
This code builds the environment for the standard Mountain Car Problem of reinforcement learning.
I'm using Python 3.9 with PyCharm and I'm wishing to use type annotations throughout. I'm trying to ...
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Stream that computes running median value
I was solving a DSA question, running median in a stream.
And I decided to design my own stream class with additional features.
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generic implementation of median
Below is a generic implementation of the summary statistics function Median.
Discussion of efficient use of std::nth_element and ...
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Generic Observer/Listener implementation in Java
I am working on a personal project in university where I am currently trying to make my own implementation of a generic observer pattern that I can use throughout my project.
I would appreciate any ...
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Getting a single result from multiple LiveData objects
I have an Android viewmodel for a Fragment that requires the user to perform multiple tasks. In addition to a LiveData object to track the status of each task, I ...
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interface different usages issue for two or more different implementations
I am writing a small micro-service in typescript with NestJS. This microservice is responsible of giving a user access to one of our company's systems trial access.
At first I used hubspot integration ...
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Handling boilerplate tasks via service pipelines
Here's a small experiment about handling boilerplate tasks via service pipelines. It's similar to the HTML pipeline but simpler and multipurpose.
I've updated the question and this is the 2nd version ...
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C Typed Vector that implements type-safety, encapsulation and lazy initialization
C Typed Vector
I wasn't happy with the various dynamic array / vector implementations in C, so I made my own. In general, I'm not the biggest fan of C-preprocessor madness, but alas for this ...
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Checking whether a string is a permutation of a palindrome in C++20 - follow-up
This post is the follow-up of Checking whether a string is a permutation of a palindrome in C++20.
So, what's new? Well, nothing else except that the procedure is now generic and accepts all ...
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Is there a better way of defining generic entity classes?
I have some entities in use in my project, and to make things easier, I would like to have the type of the key for that entity defined via a generic. E.g.:
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Generic Base Repository implementation with Unit of Work in C#
I have seen a lot of Repository pattern implementations with Unit of Work. The simplest way of implementing this I came across is using hard-coded repos (such as this one), while the way recommended ...
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Retrying a RestRequest
I wrote a method that lets me retry RestSharp requests when a specific exception is thrown.
Here's the code for that method:
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Method for create a copy of List<T>
I created a method to return a copy of List<T>, basically I convert the List<T> into an array ...
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Generic doubly linked list in C
I have implemented generic doubly linked list in C language in which you can store any data type you want. Just like in C++ and Java, where a list can store any data type, like - string, int, long, ...
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Is this C# 'hack' a bad idea?
As C# doesn't have generic specialisation like C++ template specialisation and I wanted a way to be able to do it, I came up with a little hack that goes a bit like this:
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Quicksort using generics in java
The goal is to have a function that can sort a series of all object types that implement the comparable interface. I'm not trying to improve the performance of the sort. I'm only trying to optimize my ...
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Convert a boxed integer to an nullable integer with potentially different type
Given a boxed integer (with a boxed short, int, ...) I want to convert it to an unboxed, nullable type instead. It should be ...
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FIFO array/queue
I'm new to programming and was tasked with programming a generic circular FIFO queue, without using anything but an underlying array and self-programmed methods. I still don't know how to approach ...
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CGI script that reads or writes its height and weight configuration
UPDATES:
I'm looking for an answer that can answer the questions listed in the post. Moreover, this answer will not only continue my way of thinking, but also give feedback based on it. It's just like ...
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How to save/get different type of data with less duplicated code
description:
I'm using thrift to save and get data by filter.
The data have many types, and the types may increase in the future. So I use ...
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A safe type-erased Fn Pointer in rust that can be used to call associated and regular function
I am implementing a callback method to replace the use of generics.
For maximum performance, it is not allowed to use Box and I also don’t want to use ...
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Generic Object mapping function
I implemented as an exercise a function which maps over object values in Typescript, and I am truly horrified by my type annotations.
The function:
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Generic Scanner(System.in) Parsing
Often end up using a Scanner to grab some simple input and often when dealing with Number input it can result in a lot of little ...
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Related classes around generic types
I'm wondering if this code can be simplified. I'm less than thrilled about the fact that I repeat the Draw method in both CatModel and DogModel. For that matter, I'm not real happy that that method is ...
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C - Generic vector library
I'm quite new to C, and I decided to create a generic vector library. Here is the code:
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Dynamic generic array list implementation in C99
As an exercise to get to know C a bit more, I decided to implement a dynamic array implementation in C99 with generic support.
Everything is implemented with series of macros. The array_list struct ...
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Generic queries and handlers without reflection
I'm trying to implement generic queries and handlers so that I can make requests with simple syntax, like this:
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Exists Method Implementation for Multidimensional Array in C#
To determine whether the specified array contains specific element or not, Array.Exists can be used if the given array is one dimensional. I am attempting to implement ...
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