Evangelista sleepiecappy

Eshell

eshell is the shell I’ve tried using over time, and in the end just never stick with it. Let’s try one more time with a couple of tricks. The first tricks are mostly documentation:

M-& in a tramp-aware session means you run commands in a new buffer, without a TTY. Great for things like tailf.
for ncurses-like applications, “visual commands” is the missing context. Applications like top are in the default list by default,

Pure vs impure and why should I care?

Some of the most important advancements in programming came from adding restrictions to the way we program. Famous article by Edsger Dijkstra Go To Statement Considered Harmful shows how introducing one statement into programming language breaks many nice properties of that language. goto gives us freedom and solves couple of simple problems like breaking from nested loops easily, but it can make programs very hard to understand. This happens, because we cannot look at two pieces of code in spearation. The execution can jump to some other place in code or even worse: it can jump from other piece of code to here and We need to keep that in mind.

GNU Parallel for Bioinformatics: A primer

Installation:

A quick installation does not require root access, as shown:

(wget -O - pi.dk/3 || curl pi.dk/3/ || fetch -o - http://pi.dk/3) | bash

For other installation options see http://git.savannah.gnu.org/cgit/parallel.git/tree/README

Scala: Type Families, Sealed Traits, and Exhaustive Pattern Matching

By: Matt Barackman

What is a Type Family?

A collection of objects or case classes that share a sealed trait.

In the example below, the type family would be a collection of traffic light colors with Red, Yellow, and Green as member objects.

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

Clarify and agree on the scope of the system

User cases (description of sequences of events that, taken together, lead to a system doing something useful)
- Who is going to use it?
- How are they going to use it?

	-- Based off IETF draft, https://datatracker.ietf.org/doc/draft-peabody-dispatch-new-uuid-format/

	create or replace function uuid_generate_v7()
	returns uuid
	as $$
	begin
	-- use random v4 uuid as starting point (which has the same variant we need)
	-- then overlay timestamp
	-- then set version 7 by flipping the 2 and 1 bit in the version 4 string
	return encode(

 package main
 import (
 	"context"
 	"fmt"
 	"log"
 	"net/http"
 	"sync"
 	"time"
 )

	#!/usr/bin/env python

	import os
	import argparse

	FOLDERS = ['train', 'dev', 'test']

	parser = argparse.ArgumentParser(
	description='Folder strcture generator for datasets')
	parser.add_argument('classes', type=str,

	import akka.actor.ActorRef;
	import akka.dispatch.*;
	import org.jctools.queues.MpscArrayQueue;

	/**
	* Non-blocking, multiple producer, single consumer high performance bounded message queue,
	* this implementation is similar but simpler than LMAX disruptor.
	*/
	public final class MpscBoundedMailbox implements MessageQueue {

	package com.softwaremill.freemonads

	import cats.free.Free
	import cats.~>
	import cats._, cats.std.all._
	import scala.concurrent.ExecutionContext.Implicits.global
	import scala.concurrent.Future

	sealed trait External[A]
	case class Tickets(count: Int) extends AnyVal