berkus

#![feature(unboxed_closures, fn_traits)]

fn main() {
    let add = |a: i32, b: i32| a + b;
    let sqr = |a: i32| a.pow(2);
    let add_two = |a: i32| a + 2;

    assert_eq!(chain(add, sqr)(2, 3), 25);
    assert_eq!(
        chain(

berkus

use std::collections::hash_map::Entry;
use std::collections::HashMap;

trait EntryExt<'a, K, V>: 'a {
    fn or_insert_with2<F: FnOnce(&K) -> V>(self, f: F) -> &'a mut V;
}

impl<'a, K, V> EntryExt<'a, K, V> for Entry<'a, K, V> {
    fn or_insert_with2<F: FnOnce(&K) -> V>(self, f: F) -> &'a mut V {
        match self {

berkus

# See https://news.ycombinator.com/item?id=20213092

FROM python:3

ARG VERSION=2.1.1.0
RUN pip install pytz passlib bcrypt radicale==$VERSION

ENV RADICALE_CONFIG /etc/radicale/config
RUN mkdir -p /etc/radicale
COPY config $RADICALE_CONFIG

berkus

trait Def<T> {
    fn def(&self, foo: T) -> bool;
}

impl<T, Func> Def<T> for Func
  where Func: Fn(T) -> bool
{
    fn def(&self, foo: T) -> bool {
        (self)(foo)

berkus

#![allow(mutable_transmutes)]
use std::mem::transmute;

fn main() {
    let a: Vec<u64> = Vec::new();
    let r = &a;
    let r: &mut Vec<u64> = unsafe { transmute(r) };
    r.push(1488);
    println!("{:?}", a);
    

berkus

// From https://play.rust-lang.org/?version=stable&mode=debug&edition=2018&gist=7febfe900dd6be489692040a93b2f7bd
macro_rules! impl_comparisons {
    ($ty:ty) => {
        impl PartialOrd for $ty {
            fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
                Some(self.cmp(other))
            }
        }

        impl PartialEq for $ty {

berkus

Physical layer

The dongle itself is sending out data using 802.11a (5 GHz WiFi) with OFDM and 6 Mbit/s data rate:

Radiotap Header v0, Length 38
    Header revision: 0
    Header pad: 0
    Header length: 38
    Present flags

berkus

WASM Rust to Node Example

Use only > 8.x.x NodeJS version

Install Rust before using this tutorial: curl https://sh.rustup.rs -sSf | sh

Create dirs:

mkdir wasmRustNodeExample

cd wasmRustNodeExample

berkus

trait Trait: AsTrait {
    fn get_answer(&self) -> i32;
}

struct S;

impl Trait for S {
    fn get_answer(&self) -> i32 { 42 }
}

berkus

See https://github.com/whitequark/rainbowth and https://github.com/whitequark/rainbowth/blob/master/Setup-Instructions.md for detailed installation instructions.