sleemer

1. Update PATH by running command below from vs code:
> Shell command: Install 'code-insiders' command in PATH
2. Open terminal and type
> code-insiders --diff <File1> <File2>

sleemer

1. Computers fundamentals
2. OS

• Linux
• osx

3. Networking

• Fundamentals
  • https://hpbn.co/
• Tcp
• Udp
• Ip

sleemer

public enum PublisherStatus
{
    NotRunning,
    Listenning,
    Publishing,
    Stopped,
    Failed
}

sleemer

Flow Control

Flow control is a mechanism to prevent the sender from overhelming the receiver. rwnd - receive window. Each ACK packet carries latest rwnd value for each side.

Slow-start

cwnd - congestion window. Sender-side limit on the amount of data the sender can have in flight before receiving an acknowledgment (ACK) from the client. cwnd is set up for each TCP connection. Maximum amount of data in flight is the minimum of the rwnd and cwnd.

• Time to reach the cwnd size of size N: Time = RTT(log(N/initial cwnd)) (RTT - round trip time)

Congestion avoidance

Specifies algorithms for how to grow a window to minimize further packet loss once cwnd is reset.

sleemer

using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Collections.Immutable;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Reactive.Disposables;
using System.Reactive.Linq;
using System.Text;

sleemer

using System;
using System.Reactive.Linq;

namespace Common
{
    public static class ReactiveExtensions
    {
        private static Func<int, TimeSpan> DefaultDelayStrategy = n => n == 1 ? TimeSpan.Zero : TimeSpan.FromSeconds(Math.Pow(2, n - 1));
        
        /// <summary>

sleemer

using System;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Reactive.Linq;
using Newtonsoft.Json;

public static class TcpSubscriber
{
    /// <summary>

sleemer

TLS provides all protocols above three essential services:

• Encription. A mechanism to obfuscate what is sent from one computer to another.
• Authentication. A mechanism to verify the validity of provided identification material.
• Data integrity. A mechanism to detect a message tampering and forgery.

sleemer

/// Description of the problem can be found at https://www.hackerrank.com/challenges/largest-rectangle/editorial
/// As a real use case we could consider usage of this algorithm to find out the largest rectangular subarray containing only ones.
/// For more details go to http://www.drdobbs.com/database/the-maximal-rectangle-problem/184410529
public int LargestRectangle(string input)
{
  var heights = input.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries)
    .Select(int.Parse)
    .Concat(new[] { 0 }) // add tail 0 to force calculation when we reach the last element
    .ToArray();
  var positions = new Stack<int>();

sleemer

Missing parts of the .Net Developer Days

This presintation is based on the true stories

• Abusing C# - by Jon Skeet
• Rethinking the Enterprise - by Ted Neward
• Immutability in C# - by Jon Skeet

Part I - The Art of Pain

I wonder what I could do with this that would make the Mads Torgersen wince? >