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mod unsigned; // mod user_struct; +// mod day_01; +// use day_01::{enums, structs}; + +// mod session_four; +extern crate tracing; mod session_one; use session_one::{enums, structs}; @@ -67,8 +72,13 @@ fn main() { // string::strings(); // user_struct::user_registry(); // collections::collections(); - structs::user_details(); - enums::enums_details(); + + // session_four::serde::using_serde(); + + // session_04::logging::log(); + // session_04::serde::using_serde(); + + // session_04::debugging::debugging(); // //Book creation // let book = constructor::Book::new("The Rust Programming Language", "Steve Klabnik", 2019); diff --git a/src/session_four/debugging.rs b/src/session_four/debugging.rs new file mode 100644 index 0000000..f0879cd --- /dev/null +++ b/src/session_four/debugging.rs @@ -0,0 +1,13 @@ +pub fn debugging() { + let x = 5; + + dbg!(x); + println!("The value of x is {x}"); + + // debug_only_function(); +} + +#[cfg(debug_assertions)] +fn debug_only_function() { + println!("This only runs in debug builds"); +} diff --git a/src/session_four/logging.rs b/src/session_four/logging.rs new file mode 100644 index 0000000..ab39669 --- /dev/null +++ b/src/session_four/logging.rs @@ -0,0 +1,50 @@ +use log::{debug, error, info, trace, warn}; +// use tracing::{warn, info, debug, error, info_span, trace}; +// use tracing_subscriber; + +pub fn log() { + env_logger::init(); + + info!("Application starting up"); + + if let Err(e) = do_something() { + error!("Operation failed: {}", e); + } + + debug!("Detailed state information: {:?}", get_state()); + + fn do_something() -> Result { + Ok("this is a string".to_string()) + } + + fn get_state() -> String { + "hello world".to_string() + } + + info!("App started"); + warn!("This is a warning"); + error!("An error occurred!"); + debug!("Debug info for developers"); + trace!("Detailed trace for deep debugging"); + + // tracing(); +} + +// RUST_LOG=debug cargo run + +// fn tracing() { +// tracing_subscriber::fmt::init(); + +// let span = info_span!("processing", user_id = 42); +// let _guard = span.enter(); + +// info!(task = "initialization", "Application starting up"); + +// if let Err(e) = do_something() { +// error!("Operation failed {}", e); +// } + +// fn do_something() -> Result { +// Ok("this is a string".to_string()) +// } +// } diff --git a/src/session_four/mod.rs b/src/session_four/mod.rs new file mode 100644 index 0000000..ddbae11 --- /dev/null +++ b/src/session_four/mod.rs @@ -0,0 +1,3 @@ +pub mod debugging; +pub mod logging; +pub mod serde; diff --git a/src/session_four/serde.rs b/src/session_four/serde.rs new file mode 100644 index 0000000..ef86902 --- /dev/null +++ b/src/session_four/serde.rs @@ -0,0 +1,49 @@ +use rand::seq::SliceRandom; +use rand::Rng; +use serde::{Deserialize, Serialize}; +use serde_json; + +#[derive(Serialize, Deserialize, Debug)] +struct User { + id: u32, + name: String, +} + +pub fn using_serde() -> Result<(), serde_json::Error> { + let user = User { + id: 3, + name: "marto".to_string(), + }; + + rand(); + + let user_json = serde_json::to_string(&user)?; + println!("This is the new {}", user_json); + + let user_de_json: User = serde_json::from_str(&user_json)?; + println!("This is {:?}", user_de_json); + Ok(()) +} + +fn rand() { + // Generate a random number + let mut rng = rand::thread_rng(); + let random_num: u32 = rng.gen_range(1..=100); + println!("Random number: {}", random_num); + + // Shuffle a vector + let mut numbers = vec![1, 2, 3, 4, 5]; + numbers.shuffle(&mut rng); + println!("Shuffled: {:?}", numbers); + + // Generate a random boolean + //The gen() method is generic and can generate + //random values for any type that implements the + //rand::distributions::Distribution trait. The + //rand crate provides an implementation of this + //trait for many types, including primitive + //types like bool, u32, f64, etc. + + let coin_flip: bool = rng.gen(); + println!("Coin flip: {}", if coin_flip { "Heads" } else { "Tails" }); +}