Latest posts tagged with #TuesdayCodingTips on Bluesky
C++ source code showing how constrained auto can simplify code.
Tip 93 of #TuesdayCodingTips - Constrained auto
Tired of convoluted templates in your C++? Want to make them more legible?
C++20 introduced concepts - a powerful feature that can restrict your templated APIs to only such arguments that fulfil a particular […]
[Original post on techhub.social]
C# snippet showing how to pin a byte array in c# before passing it to native code.
Tip 92 of #TuesdayCodingTips - Pinning interop memory in C#
When interoping C# with, for example, C++, one can send a pointer to the managed memory directly to the native code and work with it without the need to copy it into the local address space. For as […]
[Original post on techhub.social]
C# code snippet that demonstrates immutability of strings and performance hits of using a string vs StringBuilder.
Tip 91 of #TuesdayCodingTips - String or StringBuilder?
If you're a C++ programmer, you can easily troll yourself while working with C#'s `string` objects. In C++, they are optimized vectors of bytes and can be dynamically resized at will through […]
[Original post on techhub.social]
C# code snippet showcasing Enum.IsDefined usage.
Tip 90 of #TuesdayCodingTips - Is enum value defined?
In both C++ and C#, enums are mere named numerical constants. Even if they appear to be distinct types, and switch statements can check whether you covered all names within an enum, that's simply not […]
[Original post on techhub.social]
Tip 89 of #TuesdayCodingTips - Semantic versioning
When creating a library, semantic versioning is a really useful versioning scheme to use.
It's a promise to your users that changes bumping the minor/patch version numbers are backward-compatible. As such, much of the software relies on these […]
A C++ code snippet which shows json (de)serialization of a vector of variants with overloaded adl_serializer and nlohmann::json.
Tip 88 of #TuesdayCodingTips - Enum-discriminated unions with nlohmann::json
JSON is a fairly trivial format and as such, its only way of supporting polymorphic data is an enum-discriminated approach.
In other words, you might have an array of objects where […]
[Original post on techhub.social]
They say learning by example is the best way to learn. I'd like to share one such example of API design process based on a recent discussion with one of my colleagues: medium.com/@nerudaj/a-case-study-on...
If you follow my #TuesdayCodingTips, this showcases a […]
C++ code snippet comparing the effectivity of pushing expensive type into vector of variants vs emplacing it vs pushing back cheaper type and emplacing over that memory.
Tip 87 of #TuesdayCodingTips - Emplace into a vector of variants
`emplace_*` is an alternative to methods like `insert` or `push_*` in standard C++ containers. It allows you to construct the inserted object directly inside the container, passing all required […]
[Original post on techhub.social]
Code snippet that shows an example of an interface that breaks with every release.
Somewhat better interface since all properties are encapsulated in a context struct.
Tip 86 of #TuesdayCodingTips - Extendable logger pattern
I like my logs structured. If nothing else, I can log into a CSV file, load that CSV into Excel, turn on filters, and boom, I have a quite nice log analyzer tool. To get the maximum out of it, I need to […]
[Original post on techhub.social]
C++ code snippet showing how to demangle C++ identifiers under GCC/Clang and how a "tag" type can happen.
Tip 85 of #TuesdayCodingTips - Incomplete types and name demangling
While writing type-safe APIs, a "tag" type is often useful. It is nothing more than a forward declaration of a type that will never be fully defined, just for the sake of creating a template […]
[Original post on techhub.social]
C++ code showing a type trait for reading callable type's parameters and return type.
Tip 84 of #TuesdayCodingTips - C++ type trait for callable types
I recently asked myself: How do you make a reliable type trait for callable types so you can read their return values and call parameters?
The complexity lies in the fact that C++ has four […]
[Original post on techhub.social]
Expanded C++ implementation of NLOHMANN_JSON_SERIALIZE_ENUM macro.
Tip XX of #TuesdayCodingTips - Curious case of NLOHMANN_JSON_SERIALIZE_ENUM
I recently debugged a case where code generated by NLOHMANN_JSON_SERIALIZE_ENUM failed at invariant assertions deep in the nlohmann_json library. When examined under a debugger, the […]
[Original post on techhub.social]
C# code snippet demonstrating exception filter.
c# snippet showing that you can use references to objects in scope in exception filter.
Tip 82 of #TuesdayCodingTips - C# exception filter
Ever found yourself in the situation where you have an exact same handling code for two (or more) selected exception types? C# has a nice way of deduplicating said code.
A `catch` block, processing a base […]
[Original post on techhub.social]
C++ code demonstrating serialization through typeid with a concept for type safety, deserialization through template magic and then mattern matching on the resulting type.
Tip 81 of #TuesdayCodingTips - Pattern matching a C++ enum
For a particular C++ application I wrote, I wanted to send an enum over a string-based protocol and pattern match on it on the receiving end to make sure that all possible values were handled.
You […]
[Original post on techhub.social]
C# code that prints a loop control variable in a delayed lambda.
C# code that copies the loop control variable into a local variable so it can correctly print it in a delayed lambda.
Python code that demonstrates that you can capture a variable by copy in a lambda declaration.
Python code that demonstrates that a range-based loop creates an iteration-local variables anyway.
Tip 80 of #TuesdayCodingTips - C# lambdas and mutability rules
Mutability rules in C# are funky. While trivial types are passed into functions by value, they are captured by reference for their usage in lambdas.
That can lead to stupid bugs - what if you […]
[Original post on techhub.social]
C++ code snippet that loads a file into a string through seeking to the end of the file, figuring its size and then reading into a buffer of that size.
C++ code snippet that converts an input stream into an iterator that can be used to initialize a string.
C++ code snippet that redirects internal buffer of std::ifstream into a std::stringstream and extracting a string out of it.
Tip 78 of #TuesdayCodingTips - Many ways to read a file in C++
In C#, you can easily read a whole file using `File.ReadAllText` method. Obviously, things can't be as easy in C++.
You can choose the 'old way' where you pre-allocate a buffer to which you can […]
[Original post on techhub.social]
![C++ code implementing a custom class with multidimensional operator[].](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:xfbw6b6i7sji5i6i2m5km5os/bafkreifjn36mfie7zpurpqmuxebkbvckg4u7sixn6qqvdkprl4n2zs45jq)
C++ code implementing a custom class with multidimensional operator[].
A simple C++ sample using std::mdspan as a view over 1D array that behaves as a 3D array.
Tip 77 of #TuesdayCodingTips - Multidimensional subscript operator
A quality-of-life C++23 feature has finally been integrated into Visual Studio (v17.12) after it was available in Clang (trunk) for quite some time. That feature is the support of the […]
[Original post on techhub.social]
