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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A Failable<T> that allows safe returning of exceptions
This was inspired by a conversation in chat, that started with the discussion of C#7.0 tuples and out parameter declarations, which led to the idea that there is no 'good1' way to return an error ...
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Genericizing PropertyValues
This should be the last iteration for this code.
Does this approach make sense or am I heading down the wrong path?
The only thing I can see to make this better is to genericize the ...
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ConvertAll Methods Implementation for Multidimensional Array in C#
I am trying to perform some conversions with multidimensional array in C# and I have checked the discussion ConvertAll and 2-dimensional arrays. I found that ...
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Recursive flattening of Swift sequences
In Flatten to get all child controls of certain type in a UIView, methods were discussed to
recursively flatten a tree-like structure in Swift, resulting in an array
of all elements.
Motivated by ...
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Model simulation using Java annotations
A couple of days ago I posted my code that models systems made up of moving parts. I got several great tips and ideas and here is my latest version. My actions are now methods annotated with @Action (...
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HTML-rendering framework for emails
Sometimes I need to auto-generate html-emails. To make this task a little bit easier I created a simple framework that takes care of rendering HTML. Because I'm mainly interested in generating HTML ...
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Generic Two Dimensional Data Plane with Manipulation Methods For C#
I know that there is a generic data structure System.Array could be used to create customized type array. I want to focus on the two dimensional data structure that ...
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A SubPlane Method for Generic Two Dimensional Data Plane in C#
This is a follow-up question for Generic Two Dimensional Data Plane with Manipulation Methods For C#. Thanks to cliesens's and Rick Davin's detailed answer. Moreover, the mentioned ...
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Creating keys/names from interfaces to avoid strings
There are many APIs that require some kind of a string key/name. I usually try to avoid using raw strings and prefer to use ...
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Calculate fingerprint for an object
I need to store serialized objects in a database and I want to avoid duplicates. In order to be able to tell wheter an object is already stored, I have to compare them somehow. My idea was to ...
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Binary Heap where a comparison delegate is used
I currently have a Generic Implementation of a BinaryHeap. It must be able to maintain it's integrity with elements that may or may not implement ...
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Structure to ByteArray Extension
I have a need to turn various structures into byte arrays to be sent over serial port to another machine. I created generic extensions to turn any structure into a byte array and from a byte array ...
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Instantiating a run-time implementation of an interface
Below is my code that was written for the following task (based on an SO question):
Given a Java Collection (of N elements) create an ...
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Extension method replacing elements from an IEnumerable<T> collection
Today I needed a method to replace all 'x' values in a said collection. Since there is no such method by default in .NET I wrote my own:
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Reasonable way to implement "safe" math operations using _Generic?
I've been thinking about a way to make it easier to safely use math operations with C's basic datatypes (e.g. using the CERT C coding standard). So far, I've come up with something like this:
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Declarative type comparer
Writing comparers by either implementing the IEqualityComparer<T> or the IEquatable<T> interface is another boring ...
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Database abstraction layer for multiple providers
There's been a lot of questions lately about database provider and repository design especially without entity framework or alike.
I thought I try myself to create a reusable framework for this kind ...
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Optimize a generic foreach method that converts Datatable to my object using Reflection
I need to optimize this code block below, this method converts a Datatable object to the Object that I am passing by parameter, in another words, this serializes the object, however I have to run this ...
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Removing exact instances of elements in one list from another
Basically, here's the problem statement:
Given an IEnumerable<T> source and an IEnumerable<T> exceptions, return ...
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Generic Java task-scheduler
I wrote this generic task scheduler for executing tasks in fixed-delay intervals. Can you find anything wrong with it, or issues that may arise from using it for sending something like queued mails in ...
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Implement a generic Fibonacci sequence in Rust without using Copy trait
I'm trying to learn Rust and am a beginner. How does one go about implementing a generic version of the Fibonacci sequence without using Copy trait in Rust? My code ...
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Automatic EqualityComparer<T> tests
Writing tests is sometimes a really boring task especially if you need to write the same test for the n-th time like when you are testing another custom ...
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Parsing small data into tuples
I'd like to make parsing small samples of data more efficient (from the developer point of view). This means, instead of writing the parsing logic each time from scratch when I encounter something as ...
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Extendable REST-Client
I've been working on a REST-client. The client itself provides only very basic and generic functionality. Everything else is done with extensions. Its raw usage does not need to be convenient but ...
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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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Generic NSMapTable replacement written in Swift
This is my attempt at writing a generic NSMapTable with weak keys and strong values (after your feedback I'll be trying to write Strong-Key/Weak-Value and Weak-Key/...
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Custom collection implementing IList<T> saving current, next and previous element
I'm developing a Tic Tac Toe game where you can change your pawn look
Now as You can see it has 2 buttons one for next one for previous, and You can also pick if you want to edit the O or the X ...
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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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Factory for classes unknown at compile time
I have a class called Machine. It contains a list of parts and a list of actions. The list of parts will contain instances of the ...
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A monad in Java (FriendSpace and People)
After asking a similar question on Stack Overflow, I'm picking up on the answer there to improve my monad. I'm not trying to solve the general case, just come up with one to see how it works. If I'm ...
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Generic immutable object builder
I've made an object builder which can create all sorts of classes, it can also create immutable objects.
There are 2 requirements that must be met in order for this pattern to work with fully ...
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Calculating time windows for entities
I have made some code that operates on multiple entities and creates 'time windows' for them. Basically, the entities will contain states, usually in boolean or int. They will be timestamped and in ...
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Generic Timing Class
I have written a class which can time functions, and I'd like to have it reviewed. I'm interested in everything (better naming and commenting, accuracy of measurement, usability, structure, use of ...
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Polling loop to run in a background thread
I came up with the idea of a small utility class that will poll some delegate until the response received meets some condition, upon which it will notify the main thread which can take the appropriate ...
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Double LinkedList Deep Copy in Kotlin with Generics and Thread Safety
Goal
Return a deep copy of a double LinkedList.
Each node also contains an additional random pointer, potentially to any node or null.
Code to start
...
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Extendable REST-Client - follow-up
My previous RestClient wasn't disposing a lot of resources. I've fixed it (hopefully without introducing new issues) and because a few new patterns emerged I did a ...
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Library for parsing strings to java types, generic types and collections/arrays
I've done a library that can parse strings to different java types and to List<...>, Set<...>, ...
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Heap update generic algorithms
In the standard library, there are no algorithms for element updates. This makes it unsuitable as a queue for a Dijkstra's algorithm, for example. Thus I implemented generic heap update functions with ...
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java.util.Observable but with generics to avoid casts
This is an Observable class similar to java.util.Observable. The difference is that it uses generics to avoid casts. The ...
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Type-independent vector in C
I wanted to create a vector that can be used for different types, as generics do not exist in C.
I came up with an implementation that maintains a buffer on the heap and reallocs itself when the ...
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Functional Html builder
This is my third attempt to create a easy to use html builder because I wasn't really satisfied with the first one that wasn't extendable at all and even the one using dynamics wasn't much better. It ...
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Cached-object Store c# with Redis client for persistent storage
I have written a Cached-Object store with a Redis Client for persistent storage. The application that is going to use this is a heavy read application with the occasional write. I assume that entire ...
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Batch save with progress reporting
I reviewed this question that in my opinion uses a not so pretty batch-save so I tried improve it and this is what I came up with.
In this more generic solution that allows to reuse it I wanted to ...
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Object pooling in WPF
In a WPF project I'm working on, often multiple objects reuse the same AnimationTimeline, to smooth that out I made an ...
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Making Dependency Property registration strongly typed
I've been working on another builder, this time for the DependencyProperty because it's object-based. This means that every ...
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Recursive flattening of Swift sequences - an overly complicated approach
I recently read and answered Martin R's Recursive flattening of Swift sequences and continued to play around with the code until I arrived at something that was both pretty cool and possibly an ...
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Tips on multiple key Map-wrapper
I'm creating a simple generic Map-wrapper with multiple keyed values.
I'm intending to use it with storing edges in a graph, where an edge goes from one vertex to ...
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Sequence generators not only for potatoes but also for apples and oranges
The last question about sequence generators Growing potatoes in delayed sequences was only about potatoes. I thougt why not make it work with apples and oranges too so I made it generic.
The base ...
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