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January 2, 2025 / Last updated : January 2, 2025 admin Rust Programming

Rust Enum Representation Example

repr Memory Efficiency with #[repr(u8)] In Rust, enums are often used to represent a type that can take on a set of values, but by default, the underlying representation of an enum might be larger than needed. Using #[repr], we can specify exactly how we want the enum to be stored in memory. Let’s explore […]

cat_smart_contract
January 1, 2025 / Last updated : January 10, 2025 admin Rust Programming

Invoke Soroban Smart Contracts on Stellar Testnet

This article explains how to use one of the Soroban provided examples We’ll Deploy and Invoke Soroban Smart Contracts where one contract calls another. TL;DR: Contract B’s add_with function invokes Contract A’s add function to do some addition. **Ok, so I used chatGPT to help write this, but the code has been tested by a […]

merkle-tree
December 20, 2024 / Last updated : December 21, 2024 admin Bitcoin Programming

Building a Merkle Tree in Rust: Step-by-Step Guide with Code

Merkle trees are a fundamental component in many blockchain and cryptographic systems. They allow for efficient and secure verification of large datasets. In this article, we’ll walk through how to build a Merkle tree in Rust, step-by-step, and provide the complete code at the end. Understanding the Process Here’s how the construction of a Merkle […]

slice in Rust
December 19, 2024 / Last updated : December 19, 2024 admin Rust Programming

Understanding .as_slice() vs &[ ] in Rust

When working with Rust, you’ll often encounter scenarios where you need to interact with slices. Two common approaches for converting data structures to slices are using .as_slice() and the &[ ] syntax. While both can often achieve the same result, there are subtle differences in intent, safety, and compatibility that make each appropriate for different […]

A UTXO represents an output of a transaction that has not yet been spent
December 16, 2024 / Last updated : December 16, 2024 admin Bitcoin Programming

UTXO References in Transactions with Rust

Understanding UTXO References in Transactions with Rust: A Practical Guide In blockchain and cryptocurrency systems, UTXO (Unspent Transaction Output) is a critical concept. Transactions consume UTXOs from previous transactions and create new ones for future use. This tutorial will guide you through using Rust to search for transactions referencing specific UTXOs using efficient data structures […]

Transforming and Collecting into a Vector
December 6, 2024 / Last updated : December 6, 2024 admin Rust Programming

Transforming and Collecting into a Vector

Let’s assume we have a list of numbers, and we want to transform them into a list of structs: into_iter(): Consumes the original collection, turning it into an iterator. enumerate(): Adds an index (id) to each item. map(): Applies a closure to transform each item. collect(): Gathers the transformed items into a collection (e.g., Vec). […]

December 2, 2024 / Last updated : December 2, 2024 admin Rust Programming

Closures in Rust: Static vs. Dynamic Dispatch with impl Fn and Box

Comparison: impl Fn vs Box<dyn Fn> 1. Using impl Fn (Static Dispatch) Explanation: 2. Using Box<dyn Fn> (Dynamic Dispatch) Explanation: Key Differences: Feature impl Fn (Static Dispatch) Box<dyn Fn> (Dynamic Dispatch) Dispatch Type Compile-time (Static Dispatch) Run-time (Dynamic Dispatch) Performance Faster (No heap allocation) Slower (Heap allocation + Indirection) Flexibility Less flexible (Fixed closure type) […]

November 28, 2024 / Last updated : June 30, 2025 admin AI ML

Qdrant & Rust – embeddings

While most examples for performing embeddings will be Python code, Rust is better when performance, safety, and scalability are critical. Most examples/tutorials stick to Python, maybe it’s easier to start with but let’s look beyond “getting started”. Let’s explore Qdrant some more, this time we’ll delve into the Rust client plus fastembed. (Note: If you […]

tokio
November 26, 2024 / Last updated : November 27, 2024 admin Rust Programming

tokio::spawn

Tokio is an asynchronous runtime for Rust. “It provides the building blocks needed for writing network applications.” – It’s pretty much the de-facto standard for Rust! Before we look at “spawn” let’s review what tokio is, how to use it, and look at what tasks are. tokio::main The #[tokio::main] function is a macro. It transforms […]

Many threads and primarily read-heavy operations? RwLock minimizes contention by allowing multiple threads to read in parallel.
November 25, 2024 / Last updated : November 26, 2024 admin Rust Programming

When or why should I use a Mutex over an RwLock?

TL;DR – use the “R” in RwLock as “R” for READ – i.e when there are lots of reads/Read mostly, use RwLock Choosing between a Mutex and an RwLock in Rust depends on the nature of the access patterns and the trade-offs you’re willing to make in your program’s concurrency model. Here’s a detailed breakdown […]

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