Let’s consider a more real-world example. Imagine you have a system that represents different types of data sources, like Database and File, each implementing a DataSource trait. The DataSource trait has a method get_backup_source that returns a backup data source as a trait object. This could be useful if your application needs to switch to […]
when implementing the Iterator trait in Rust, your struct usually needs some form of state to keep track of the iteration’s progress. Often, this is achieved by including a counter or index field in your struct. https://doc.rust-lang.org/stable/book/ch13-02-iterators.html?highlight=iterator%20trait#the-iterator-trait-and-the-next-method Also, check out : https://doc.rust-lang.org/stable/book/ch19-03-advanced-traits.html#specifying-placeholder-types-in-trait-definitions-with-associated-types impl Iterator for Here’s a basic example of how to implement an iterator […]
“The Rust Implementation of the libp2p networking stack.” https://github.com/libp2p/rust-libp2p/blob/master/libp2p/src/tutorials/ping.rs Peer-to-peer networking library libp2p is an open source networking library used by the world’s most important distributed systems What is a swarm? A swarm in libp2p represents a group of peers that can communicate over a P2P network. It provides the necessary abstractions for connection management, message […]
One of the more confusing examples for me to learn when studying Dave Macleod’s excellent “Rust in a Month of Lunches” was page 145. Check the “Rust Book” for the official description of the from trait : https://doc.rust-lang.org/std/convert/trait.From.html I modified the example to use cities in England to help me relate to it! Two cities, […]
If you are new to SurrealDB and Rust you may be interested in how to get the data from a Response or even be trying to parse a ‘Value’. The Response struct The secret is to make a struct that will contain the keys (field names) that are present in the response. You don’t want […]
Let’s look at “state” in Actix-web HttpRequest::app_data app_data is a method provided by actix-web, specifically for the App and HttpRequest types. Here’s how it works: Summary: Example code Alternatively, use the HttpRequest::app_data method to access data in a handler. And here is the main function The line Data::clone(&data) is effectively cloning a reference to the […]
Let’s look at namespaces, scope, and state: https://actix.rs/docs/application Here’s a real-world use case where application state is essential in an Actix Web application. Consider a scenario where you have a web service that provides exchange rates for different currencies. You might want to maintain a cache of these rates in the application state to avoid […]
Regular functions block threads Async doesn’t block threads Before we look at what tokio does, let’s consider how we’d run 3 tasks if they were ‘blocking’ Without Tokio (blocking): If you used std::thread::sleep, the execution would pause (block) for each function call until the sleep duration completes. This means that when you execute the code […]
Code plus screenshots – how to manipulate the layout in Rust + iced.rs Credit : https://jl710.github.io/iced-guide/index.html © Héctor Ramón (hecrj) for the iced logo. just using “row” Change “row” to “column” just using “column” Column is centered…but not the text! 🤔 Column is centered and the text! 😀 Centre the window – iced.rs – 0.13 […]
