Questions tagged [template]

a design structure for creating several things that are almost identical but need different values. Not template-meta-programming.

4
votes
1answer
58 views

A Versatile Algebraic Variable Class Template with full operator support

I've been working on this concept for the past few days where a variable_t is of any type T; assuming that it is at least ...
4
votes
1answer
106 views

A basic multi-dimensional array

I have been lurking on the C++ side of stack-overflow only long enough to know there are a lot of beginners and intermediate programmers baffled by multi-dimensional arrays. I've seen a lot of ...
9
votes
3answers
16k views

Modern C++ Singleton Template

I recently read about the C++17 static inline member declaration and thought that this will make templates a little bit cleaner, since static members can now be ...
5
votes
1answer
341 views

JavaScript module to render and handle a form to add users

I recently switched to modular JavaScript and really like the idea of having the state of your application in JavaScript and not in the DOM. I want to know if what I am doing is considered best ...
4
votes
1answer
41 views

C++ wrapper around uniform mt19937 SequenceContainer [closed]

With the following interface in mind EasyRandom<unsigned int> prng(a, b); auto x = prng(); // scalar auto v = prng(10); // vector I wrote the following ...
3
votes
1answer
81 views

Elevation to power function using class templates

I attached below a small working example of a function that is able to perform x^y. As it is possible to see the base (x) takes ...
5
votes
1answer
47 views

Emulating Virtual Registers Part 3

Forward This is a continuation of my work in progress and the last iteration that I posted can be found here. I have designed a compact class template that uses SFINAE with constructor delegation to ...
11
votes
1answer
2k views

Lock-free atomic shared pointer in C++14

I'm trying to write a lock-free implementation for atomic shared pointer. Basically, there are two class templates shared_ptr and ...
2
votes
0answers
51 views

Emulating Virtual Registers by experimenting with unions, bitfields, structs and template specialization

To get a better handle and understanding of how bitfields, unions, and the byte alignment of structures work, I'm simulating a template Register structure. The requirements of my Register are as ...
4
votes
0answers
37 views

Emulating Virtual Registers Part 2

This is a follow up of my original question in which I'd still like to have some answers, opinions etc. but after looking through some of the standard library's features I have come across ...
2
votes
1answer
62 views

Simple template engine in PHP

I tried writing my very first template engine today. I designed it to just replace variables in templates, and keep it basic for now. Can anyone give me some constructive criticism? I'm getting ...
8
votes
2answers
17k views

STL Stack Implementation

I implemented std::stack from the STL for deeper understanding of the language and memory since I still am only a beginner. I implemented the stack using a singly ...
12
votes
2answers
11k views

C++ string_cast<> template function

In C++, to simplify string conversion between std::string and std::wstring, I created the following utility template functions: ...
3
votes
1answer
81 views

dc.js and crossfilter app to display multiple charts

Consider the following crossfilter / dc.js app (screenshot): ...
4
votes
2answers
146 views

Detecting if an element is found inside a container

I just wrote this template to detect if a given element is found inside a container: ...
2
votes
1answer
54 views

Replacing MIN and MAX macros with type-safe, recursive templates of variable arity

I'm currently reading Mastering Perl for Bioinformatics; I'm using the book for learning bioinformatics while implementing the code in C++. I came across a situation where I needed to use the minimum ...
4
votes
2answers
108 views

C++ Pixel/Array manipulation libs

I was tired to always perform pixel manipulation one by one, so I started to create my own templated header to perform computation over pixel (RGB, or RGBA), but I also make it for ND for some cases. ...
3
votes
0answers
46 views

Generic Variable Elimination with multiple entry points

I have this algorithm, called Variable Elimination, which is used quite often in my code-base (library). It is an algorithm for factor graphs (a type of bipartite graphs), used to efficiently maximize ...
5
votes
1answer
63 views

Simple bash script creates apache2 virtualhost config for subdomain

Simple bash script to create apache2 virtualhost for localhost. Can be used for public subdomains on developer server with changes - "replace .localhost". Tested on Ubuntu, but should work where ...
1
vote
0answers
53 views

Simple dynamic array template

For my game engine I needed a simple templated array class that can be safely passed across module boundaries. It's not supposed to be a replacement for std::vector and thus doesn't need all of its ...
1
vote
0answers
42 views

Value-To-Type Map

Context For one of my projects I have to use a library which works similarly to the following code : ...
1
vote
1answer
118 views

Calculating array size in C++

This code shows two ways to calculate size of array of any type. I would like to know, which should be preferred? Is there any advantage/disadvantage? ...
0
votes
0answers
33 views

Templated JSON parsing methods that work with an element or elements array

Consider the following two Java methods. The first takes a JSON string representing one element, the second representing multiple elements. gson.fromJson() can be ...
4
votes
1answer
232 views

Variadic Datablocks

I would like to have my variadic template class reviewed. First some explanation what it should do: I'm writing an application where I read in blocks of data. I know before i read in the data which ...
17
votes
4answers
10k views
6
votes
1answer
74 views

Smart pointer like implementations

For educational purposes I implemented standard library smart pointers like class templates. They are definitely not a full replacement for the library classes but I'd like to get some comments on the ...
0
votes
1answer
50 views

Generate a text file representing an email for a job application followup

Purpose: After you've submitted a resume and cover letter for a job position, you haven't heard anything back, so you decided to send a follow up email. The script generates the follow up e-mail based ...
1
vote
2answers
74 views

Insertion Sort and Selection Sort Implementation

I wanted to practice using templates since I have no experience with them, so I implemented these sorting algorithms. Selection Sort: ...
0
votes
0answers
18 views

Optimizing Datatables table of tens of thousands of client-provided rows

We have this employees table, that looks like this: that contains 16,530 employee rows. As expected, this table takes more than 30 seconds to load. I have been tasked with speeding it up somehow. ...
2
votes
1answer
59 views

Loop over whole array starting from any index

I recently had to repeatedly iterate over an array but increment the index to start from each time. Since this is quite cumbersome in comparison to a normal for loop I made a small template function ...
3
votes
1answer
130 views

Implementation of static_vector using an array of std::aligned_storage, with std::launder and forwarding

I'm trying to expand on the implementation of static_vector on the std::aligned_storage reference page, but would like to split it into two parts. First, an ...
3
votes
2answers
128 views

Simple Matrix Template Class

I wanted to make a matrix template class to see if I can learn how to use templates, work on figuring out the indexing in loops, and making an interface so the user can know if an operation will work. ...
1
vote
0answers
34 views

Displaying Singapore bus arrival times using a Go template

I am wondering whether my template usage in main.go could be better. For example in other code I notice: ...
2
votes
0answers
93 views

Observer(Event) system (Signals and Slots), type and template based

Signals are represented as types. You can connect a member function of some instance to the Observer system. This connected function will be called whenever a signal of a type that is the same type as ...
0
votes
1answer
27 views

Injecting a set of files in a Thymeleaf template while keeping the amount of tags at a minimum

I use a Thymeleaf template to inject a set of files (which contain precalculated HTML) into one big HTML. The files with their metadata are stored in a map called ...
4
votes
0answers
58 views

Tracker for object construction, copy, and movement

I made an object tracker for debugging and testing purposes called ccm_counter (construction, copy, move counter). It counts constructor, copy and move calls. It ...
2
votes
0answers
36 views

vb.net Create textfile from template

What is the best approach for creating textfiles from/with a template ? Currently I just read the template from a textfile and Replace all values needed, but I don't think that this is the most solid ...
5
votes
2answers
145 views

C++ wrapper class to mimic a C array's brace initialization

I have an inheritance class that mimics the behavior of C style array's brace initialization by using a class template that has a variadic constructor but the template itself is not a variadic ...
5
votes
2answers
93 views

add_const or remove_const based on another type

Here is a type trait which - I feel - could fit in std next to std::add_const and ...
1
vote
1answer
100 views

Template matrix class, second version

This is my first matrix class which I updated after already asking here already. The updated code is below. Are there any suggestions regarding member function parameters? Is there a convenient ...
6
votes
2answers
300 views

First template class - Matrix functions

This post has been answered and updated. This was the first time I've ever written a template class. I've spent probably a bunch of times re-writing matrix code for different types, different ...
10
votes
1answer
1k views

C++ math vector template

I wrote a basic template for a vector of arbitrary dimension to be used in a 3D-engine. Most operators make use of C++ template meta programming and instances are implicitly convertible to glm types. ...
3
votes
2answers
94 views

C++ Vector with templates

I am learning about templates in C++ so I decided to implement an N-dimensional vector. The code seems to work fine, but there are a few things that I am unsure about. To stop ...
4
votes
2answers
117 views

Templated string formatting

This function formats a string by replacing every occurrence of '{n}' with the corresponding argument that was passed to the function where n is an index that ...
2
votes
1answer
246 views

C++ - Trie Implementation

I am trying to learn trie and this is my first implementation. I started off with the idea of being able to handle different data types for key and value; however, I found the data structure a bit ...
2
votes
1answer
94 views

Synchronized template wrapper class

Issue: Code base has lots of data structures which are accessed between threads with >= 1 writer. Application logic becomes obfuscated due to lots of mutex locks. Solution: Create a template ...
0
votes
1answer
45 views

PHP simple template loader

This is not really a question but I'd like to obtain some opinions about this simple class. For an old project I had the necessity to load some php template files that includes some ...
1
vote
0answers
397 views

A simple and efficient packet frame encoder/decoder

I have written a simple packet-framing class, for converting un-encoded 'packets' into encoded/delimited 'frames,' to be sent over a P2P serial connection. The functionality is based on the RFC 1662 "...
-2
votes
1answer
60 views

Is this a good/bad/ugly way of assigning unique IDs to objects in C++? [closed]

My project has many different objects from different classes, and I want each object to have a unique ID. IDs should be unique within each class type, but can be the same among different classes. For ...
3
votes
1answer
170 views

Internal Zip-like Iterator

My goal was to create an zip-like iterator to selectively iterator over a subset of arrays in a larger manager object, compare itself to any other zip-like iterator, but can be copy constructed from ...