TrentSPalmer

Install a Gentoo nspawn Container on Ubuntu 17.04 on Digital Ocean.

Spin up an Ubuntu 17.04 droplet, because nspawn containers are slightly more difficult with Ubuntu 16.04. Install systemd-container. (This will also work on your local workstation or laptop running Ubuntu 17.04.)

apt install systemd-container

playground.rs

use std::collections::HashMap;

#[derive(Clone, Debug)]
struct Data {
    values: Vec<i32>,
    pass_to: Option<usize>,
}

impl Data {
    fn has_complete_values(&self) -> bool {

playground.rs

#[derive(Clone, Copy)]
struct Comp;
struct USB;
struct Card;

impl USB {
    fn get_version(&self) -> Option<f64> {
        Some(1.2)
    }
}

playground.rs

use std::fmt::Debug;

fn takes_two_things<T: Debug, U: Debug>(x: T, y: U) {
        println!("{:?} {:?}", x, y);
}

fn main() {
    takes_two_things(3, "ok");
    takes_two_things(3, 2); // fine if the same
}

playground.rs

use std::str::FromStr;

#[derive(Debug)]
enum Version { Version1, Version2 }

#[derive(Debug)]
enum ParseError { InvalidSyntax, UnsupportedVersion }

struct NameValue {
    name: String,

playground.rs

use std::str::FromStr;

#[derive(Debug)]
enum Version { Version1, Version2 }

#[derive(Debug)]
enum ParseError { InvalidSyntax, UnsupportedVersion }

fn parse_version(line: String) -> Result<Version, ParseError> {
    let mut split = line.split("=");

thcipriani

me:
	@true

a:
	@true

sandwich:
	@[ "$$(id -u)" -eq 0 ] && echo "Okay." || echo "What? Make it yourself."

.PHONY: me a sandwich

jayjanssen

this is a sample of output:

root@percona-db-2:~# iperf -s -u -B 226.94.1.1 -i 1
------------------------------------------------------------
Server listening on UDP port 5001
Binding to local address 226.94.1.1
Joining multicast group  226.94.1.1
Receiving 1470 byte datagrams
UDP buffer size:   122 KByte (default)
------------------------------------------------------------

egonSchiele

import Control.Monad
import Control.Concurrent
import Control.Concurrent.STM
import System.Random
import Text.Printf

-- Forks
type Fork = TMVar Int
 
newFork :: Int -> IO Fork

MohamedAlaa

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname