Swapping between Vec elements in Rust can be a little tricky. The get method returns Option<&T>, and the lone swap method accepts an index and a value – not a reference. There is an alternative, though. But it uses unsafe codes.… Continue Reading
Rust framework Rocket goes stable starting with version 0.5 and Rust 1.45.0. No doubt, it is one of the best frameworks out there. However, it requires Rust Nightly. When I started learning Rust, I needed to choose between Actix-Web and… Continue Reading
This post shows how to modify a struct instance in a function. It uses the mutable shared borrowing to pass a mutable reference as an argument to a function. Struct And Instance Consider the following Person struct. It has two… Continue Reading
This post shows how to build a Ubuntu 18.04 Docker image with installed Rust. We can use the image to build Rust applications, but the codes are in the host Windows system. When we compile the codes, we need to… Continue Reading
Understanding what references are in Rust and how to use them is crucial. A reference is a pointer to a memory location. A location where the data we’re interested in reside. A reference is not the same as the traditional… Continue Reading
There are a few ways to define an enum variant and, as a result, to use it when creating match expressions. We can define a variant in three ways – one-word, Tuple-like, or Struct-like. Match One-Word Enum Variants Let’s say… Continue Reading
We can create custom data types in Rust using struct, trait, and enum. A struct is a composite data type that groups variables in a memory block. These variables are then accessible via the struct’s instance – also referred to… Continue Reading
Rust has two types of core data types – scalar and compound. Scalar types are single-value types, while compound types are multi-value types. Integer Data Types An integer data type is one of Rust’s core data types that represents a… Continue Reading
Variables in Rust are similar to variables in other high-level programming languages, and how we declare and use them are pretty straight-forward. There are several types of variables, and their declaration may differ from each other. Types Of Variables In… Continue Reading
R2D2 is a connection pool for Rust applications, e.g., Actix-Web, that use databases like MySQL. Opening and closing a database connection is an expensive operation. With connection pooling, the database connection creation happens once, and the application can reuse it… Continue Reading
