Rust Memory Management Notes

main.c

#include <stdio.h>

int main(int argc, char** argv)
{
    char* h = "hello"; // char* -> ['h' 'e' 'l' 'l' 'o' '\0'] length: 5
    char* w = "world";

//    printf("%s, %s!\n", h, w);
//    char* s = "secret";
//    printf("%s, %s %s!\n", h, &h[12], w);
//    printf("%s, %s %s!\n", h, h+12, w);
//
//    int i;
//    for (i = 0 ; i < 19; i++ ) {
//        printf("  %c  ", h[i]);
//    }
//    printf("\n");
//    for (i = 0 ; i < 19; i++ ) {
//        printf("0x%x ", h[i]);
//    }
}

main.cc

#include <iostream>
#include <string>
using namespace std;

int main() {
    string h = "Hello";
    string w = "world";
    string s = "secret";
    cout << h.length() << endl;
    cout << h << "," << w  << "!" << endl;
    cout << "[" << h[19] << "]";
    return 0;
}

main.rs

fn main() {
    let h = String::from("Hello");
    let w = String::from("world");
    println!("{h}, {w}!");
    // let s = String::from("secret");
    // println!("s: {s}");
    // let t = s;
    // println!("s: {s}");
    // println!("t: {t}");
    // let v = thing(t);
    // println!("t: {t}");
    // println!("{v}");
    // let x = size(&v);
    // println!("{v}");
    // println!("{x}");
}
// fn thing(s: String) -> String {
//     let r = s.chars().rev().collect::<String>();
//     r
// }
// fn size(s: &String) -> usize {
//     let size = s.len();
//     size
// }
// fn dangle() -> &String {
//     let stuff = &String::from("new stuff");
//     return stuff;
// }

Rust Memory Management Notes.md

Rust lang
StackOverflow - Most loved
Rust timeline
StackOverflow - Most popular
C++ malloc / free
Python - Reference counting
Reference couting
Go GC improvements
Java GC
Rust in 100 seconds
Rust doc - Ownership