JonathanLoscalzo

// Ordinary
public class SimpleDto : ValueObject<SimpleDto>
{
    public string Value { get; set; }
}

// With base class
public abstract class BaseDto<T> : ValueObject<T>
{
    public string BaseValue { get; set; }

JonathanLoscalzo

Often referred to as the "swiss army of knife" for TCP/IP networking, [Netcat][1] is an extremely versatile Linux utility that allows you to do anything under the sun using TCP/UDP sockets. It is one of the most favorite tools for system admins when they need to do networking related troubleshooting and experimentation.

In this tutorial, I am sharing a few useful netcat examples, although the sky is the limit when it comes to possible netcat use cases. If you are using netcat regularly, feel free to share your use case.

Note that when you are binding to well-known ports (0-1023) with nc, you need root privilege. Otherwise, run nc as a normal user.

1. Test if a particular TCP port of a remote host is open.

$ nc -vn 192.168.233.208 5000

JonathanLoscalzo

using System;

class DateTimeRange : ValueObject<DateTimeRange>
{
    public DateTime Start { get; }
    public DateTime End { get; }

    public DateTimeRange(DateTime start, DateTime end)
    {
        Start = start;

JonathanLoscalzo

async function orderItems() {
  const items = await getCartItems()    // async call
  const noOfItems = items.length
  const promises = []
  for(var i = 0; i < noOfItems; i++) {
    const orderPromise = sendRequest(items[i])    // async call
    promises.push(orderPromise)    // sync call
  }
  await Promise.all(promises)    // async call
}

JonathanLoscalzo

Exposing a directory on the host machine to an LXC container

1. Log into the container and create an empty directory, this will be the mount point
2. Log out and stop the container.
3. Open to your container's config file
   • For regular LXC containers: /var/lib/lxc/mycontainer/config
   • For unprivileged LXC containers: $HOME/.local/share/lxc/mycontainer/config
4. Add a new line above the lxc.mount directive, that follows the format below. Substitute proper paths as necessary:
   • lxc.mount.entry = /path/to/folder/on/host /path/to/mount/point none bind 0 0

• Both of these paths are relative to the host machine.

JonathanLoscalzo

function getPaginatedItems(items, page, pageSize) {
  var pg = page || 1,
    pgSize = pageSize || 100,
    offset = (pg - 1) * pgSize,
    pagedItems = _.drop(items, offset).slice(0, pgSize);
  return {
    page: pg,
    pageSize: pgSize,
    total: items.length,
    total_pages: Math.ceil(items.length / pgSize),

JonathanLoscalzo

From star history:

• PAAS comparison
• flynn vs deis
• PAAS for microservices simple review
• Google Omega Paper

JonathanLoscalzo

Programación Concurrente 2015

Apuntes de Programación Concurrente, Facultad de Informatica, UNLP. Promoción teorica 2015 - febrero.

Teoria 1

##Qué es la concurrencia?

JonathanLoscalzo

from sklearn.datasets import *
from sklearn import tree
import graphviz

wine = load_wine()
clf = tree.DecisionTreeClassifier() # init the tree
clf = clf.fit(wine.data, wine.target) # train the tree
# export the learned decision tree
dot_data = tree.export_graphviz(clf, out_file=None,
                         feature_names=wine.feature_names,

JonathanLoscalzo

from sklearn.datasets import *
from sklearn import tree

from sklearn.metrics import roc_curve, auc
from sklearn.model_selection import train_test_split
from sklearn.preprocessing import label_binarize

n_classes = 3
wine = load_wine()
clf = tree.DecisionTreeClassifier()