RandyMcMillan

From Bitcoin Core version 0.9.0 released:

On OP_RETURN: There was been some confusion and misunderstanding in the community, regarding the OP_RETURN feature in 0.9 and data in the blockchain. This change is not an endorsement of storing data in the blockchain. The OP_RETURN change creates a provably-prunable output, to avoid data storage schemes – some of which were already deployed – that were storing arbitrary data such as images as forever-unspendable TX outputs, bloating bitcoin's UTXO database.Storing arbitrary data in the blockchain is still a bad idea; it is less costly and far more efficient to store non-currency data elsewhere.

Pros

Limits the delays of block propagation

OP_RETURN data remains prunable

Less stress on the UTXO set, which causes the blockchain to bloat in size

Mitigates mining centralization

RandyMcMillan

// A placeholder function for a_k.
// YOU WILL NEED TO REPLACE THIS WITH YOUR ACTUAL DEFINITION OF a_k.
fn get_a_k(_k: i32) -> f64 {
    // Example: For demonstration, let's just return 1.0 for all k.
    // In a real scenario, this could be:
    // - a value from a lookup table (e.g., if a_k is stored in a Vec)
    // - a result of a mathematical formula (e.g., k! or 1/k)
    // - a coefficient of a specific series (e.g., Fourier series, Taylor series)
    1.0
}

RandyMcMillan

fn print_pascals_triangle_in_binary(num_rows: usize) {
    if num_rows == 0 {
        return;
    }

    let mut current_row: Vec<u64> = vec![1]; // Using u64 for larger numbers
    println!("{:b}", current_row[0]); // Print 1 in binary

    for r in 1..num_rows {
        let mut next_row: Vec<u64> = vec![1]; // First element is 1

RandyMcMillan

use std::{
    io::{self, Write},
    path::Path,
};
use tokio::io::AsyncWriteExt; // For async file writing

const DEST_DIR: &str = "torrents";

#[derive(Debug, serde::Deserialize)]
struct Torrent {

RandyMcMillan

use num_bigint::{BigInt, BigUint, Sign};
use num_traits::{One, Zero};
use std::str::FromStr; // For parsing BigUint from strings (e.g., hex)

// --- RSA Core Functions ---

/// Performs modular exponentiation: base^exp % modulus
fn modpow(base: &BigUint, exp: &BigUint, modulus: &BigUint) -> BigUint {
    // This is the core of RSA. `num-bigint` provides an optimized `modpow` method.
    base.modpow(exp, modulus)

RandyMcMillan

HOSTNAME=`hostname` ssh-keygen -t rsa -C "$HOSTNAME" -f "$HOME/.ssh/id_rsa" -P "" && cat ~/.ssh/id_rsa.pub

RandyMcMillan

use num_complex::Complex64;

/// Calculates the next iteration of the given complex number z using the formula:
/// Z_n+1 = (Z_n^3) / (Z_n^3 + 1) + c
///
/// # Arguments
/// * `z_n` - The current complex number Z_n.
/// * `c` - The complex constant c.
///
/// # Returns

RandyMcMillan

use std::io;
use std::fs;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    // Create a dummy config.toml file for demonstration purposes
    fs::write("config.toml", "key = \"value\"\nother_key = 123\nanother_string_key = \"hello world\"")?;

    let contents = fs::read_to_string("config.toml")?;
    println!("Contents of config.toml:\n{}", contents);
    println!("------------------------------------");

RandyMcMillan

fn calculate_pi_vieta(iterations: u32) -> f64 {
    if iterations == 0 {
        return 0.0; // Or handle as an error/special case
    }

    let mut current_sqrt_term = 0.0f64; // Represents the nested sqrt part (e.g., sqrt(2), sqrt(2+sqrt(2)))
    let mut pi_approximation = 2.0f64; // Initialize with the leading '2' in the formula

    for i in 0..iterations {
        if i == 0 {

RandyMcMillan

fn main() {
    let mut numbers = vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
    println!("                  0  1 (2  3  4  5]");
    println!("Original vector: {:?}", numbers);
    #[allow(unused_variables)]
    for num in numbers.clone() {
        //print!("{} ", num);
    }
    //println!();
    // We want to drain elements from