https://www.codewars.com/kata/52de553ebb55d1fca3000371/train/rust Try the challenge on CodeWars first – and then have a look at my solution which is mainly based on this challenge. What did I learn from this? Well, I worked out that using a HashMap was a neat way to identify the gap that was different to the others. What else? Starting from […]
A checksum is often used over something like an MD5 hash for speed and simplicity when you only need to quickly verify data integrity or detect errors. Just for some practice let’s guess (brute force) a checksum, we’ll provide the checksum and then work out what data would produce the checksum : Note the use […]
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 […]
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 […]
Let’s pick the code apart for a timelock smart contract and with a bit of help from chatGPT and the Stellar documentation we’ll make sure we understand every part of it. https://github.com/stellar/soroban-examples/blob/main/timelock/src/lib.rs Timelock This is how it works with Alice and Bob: In summary, the contract protects the funds by ensuring that only the designated […]
