andrei-cacio

fetch('memory-access.gc.wasm')
  .then(r => r.arrayBuffer())
  .then(arrayBuff => WebAssembly.instantiate(arrBuff, {}))
  .then(rustWasm => console.log(rustWasm));

// Object { module: WebAssembly.Module, instance: WebAssembly.Instance } 

andrei-cacio

const typedArr = new Uint32Array(arrayBuffer, 0, 4);
const arr = [...typedArray];
// [100, 200, 300, 400]

andrei-cacio

#[no_mangle]
pub fn simple_arr() -> *mut i32 {
	let vec = Box::new([100, 200, 300, 400]);

	Box::into_raw(vec) as *mut i32
}

fn main() { }

andrei-cacio

rustup default nightly
rustup target add wasm32-unknown-unknown --toolchain nightly
cargo install wasm-gc

andrei-cacio

async function distil(imgPath, nrOfPalettes = 2) {
  const wasmModule = await compile('distil.wasm');
  const { imgBufferLocation, length } = await readImgIntoMemory(imgPath);
  
  const paletteBuffer = wasmModule.exports.distil(imgBufferLocation, length);
  
  console.log(bufferToHex(paletteBuffer, nrOfPalettes)); 
}

// -> ['#ff1122', '#jjkkll']

andrei-cacio

import eventEmiter, { EVENTS } from './core/bus';

function authenticate(user, password) {
  return new Promise((resolve, reject) => {
    eventEmitter.once(EVENTS.AUTH.SUCCESS, resolve);
    eventEmitter.once(EVENTS.AUTH.FAILED, reject);
    
    eventEmitter.trigger(EVENTS.AUTH.ATTEMPT, { user, pass });
  });
}

andrei-cacio

import eventEmiter, { EVENTS } from './core/bus';

function authenticate(user, password) {
  return new Promise((resolve, reject) => {
    eventEmitter.on(EVENTS.AUTH.SUCCESS, resolve);
    eventEmitter.on(EVENTS.AUTH.FAILED, reject);
    
    eventEmitter.trigger(EVENTS.AUTH.ATTEMPT, { user, pass });
  });
}

andrei-cacio

import EventEmitter2 from 'eventemitter2';

const appBus = new eventEmitter();
const EVENTS = {
  AUTH: {
    SUCCESS: 'AUTH.SUCCESS',
    FAILED: 'AUTH.FAILED',
    ATTEMPT: 'AUTH.ATTEMPT',
};
  

andrei-cacio

import eventEmiter, { EVENTS } from './core/bus';

eventEmitter.on(EVENTS.AUTH.SUCCESS, () => {});
eventEmitter.on(EVENTS.AUTH.FAILED, () => {});
eventEmitter.trigger(EVENTS.AUTH.ATTEMPT, { user, pass });

andrei-cacio

const someRequest = new Request('/api/v1/logout');
someRequest.credentials = 'same-origin';

fetch(someRequest)
  .then(response => console.log(response));