# Rust Intro

3 min read, 570 words rust language

System programming languages
- C, C++, golang
- used to make drivers and compilers
Application programming language
- C#, java, javascript
No garbage collection
Package manager - cargo
- similar to npm, composer ofr php, pip for python
rustup to check language updates
ructc compiler
cargo package manager
either do compile and run yourself or use cargo
Built at Mozilla
- People observed Firefox had security vurnabilities
- over half of them were due to memory unsafety
  - Why? we use C++ wrong
Language as efficient as C, C++ but not actually dangerous.
Safety - if you used pointer wrong
- hackers can steal your bitcoin
Usenet - twitter over email
1995 was an amazing year or porgramming lanaguages, java, javascript, ruby (1990-91 python)

# real compiled code
./target/debug/hello-world

# production optimized build
cargo build --release

# build executable
../target/release/hello-world

Web assembly might have replaced docker

If WASM+WASI existed in 2008, we wouldn't have needed to created Docker. That's how important it is. Webassembly on the server is the future of computing. A standardized system interface was the missing link. Let's hope WASI is up to the task! https://t.co/wnXQg4kwa4
— Solomon Hykes (@solomonstre) March 27, 2019

Assembly is dangerous lets make C, which is higher level and easier to use and make less mistakes.
- Add safety on top, built into programming language
C++ vs Ruby | Speed vs Safety
70% of vurnabilities across all microsoft products are due to memory unsafety
Higher level languages like node, python, javascript reach out lower level languages for speed. like C, C++

What is a runtime (opens new window)?

People have

C/C++ dont have a runtime (opens new window)
Languages like ruby, javascript, python have a runtime (opens new window)
C,C++,rust has small runtime (opens new window)

runtime

Assembly is the only language that do not have a runtime (opens new window)

Stuff that your programming language puts into your programs that you actually didint write.

Push the web to limits, everything to all people.
WASM - making web more ambitious - low level subset of javascript

function compiledCalculation () {
  // bitwise OR
  var x = f() | 0;  // 32-bit value
  var y = g() | 0;
  return (x+y) | 0;
}

Use bitwise OR to guarent to use 32-bit integer
- integers are faster than floats
- The only types of numbers in javascript are floats
- Make them faster by explicitly mentioning types.

# Webassembly

less data over wire
- pages load faster
significantly easier to parse - makes webapps faster
We dont write webassembly by hand, write in other languages than compile them to wasm
Compile a browser to webassembly?
WASI (opens new window)

# Going Serverless

IaaS provide infrastructure api like linux
- we create an vm and install linux on it. then you do whatever you want.
PssS provide a language specific api
- like heroku can host ruby code, provides ruby api
Webbrowser and very similar to docker
- they privide api to run code from multiple sources

# Resources

← Concepts Rust Conf →