Firefox is removing its experimental support for installing Progressive Web Apps to the desktop. Whether or not this really constitutes giving up on PWA depends on your point of view, but I think it is disappointing, both for PWA and for Firefox. 

100,000+ Books in Plain Text Format — This is targeted at people with machine learning use cases but could be ideal as a dataset for all sorts of things. It’s a 37GB download though. There’s also a 100GB file containing source code for similar purposes. 

I’ve started looking at using MediatR for my domain events implementations. To that end, I created a quick sample project using ASP.NET Core 2.0. Overall things were pretty easy to get going. If you haven’t used MediatR before, or if you’re looking for a quick intro on how to set it up for ASP.NET Core, keep reading (if not, how did you get here? Was the title not clear?). 

Java/JVM suite for .NET: a comprehensive suite of libraries and tools to use Java/JVM APIs (Java, Scala, Kotlin, ...) and .NET side-by-side  

 This type of CollectionView does not support changes to its SourceCollection
from a thread different from the Dispatcher thread

 System.InvalidOperationException: This exception was thrown because the generator for control
'System.Windows.Controls.ListView Items.Count:62' with name '(unnamed)' has received sequence of
CollectionChanged events that do not agree with the current state of the Items collection.
The following differences were detected:  Accumulated count 61 is different from actual count 62.

 private static object _lock = new object();
//...
BindingOperations.EnableCollectionSynchronization(persons, _lock);

public static void EnableCollectionSynchronization(IEnumerable collection, object lockObject)
{
      MethodInfo method = typeof(BindingOperations).GetMethod("EnableCollectionSynchronization",
             new Type[] { typeof(IEnumerable), typeof(object) });
      if (method != null)
      {
         method.Invoke(null, new object[] { collection, lockObject });
      }
}

using System;
using System.Collections;
using System.Collections.ObjectModel;
using System.Collections.Specialized;
using System.Linq;
using System.Windows.Data;
using System.Windows.Threading;

namespace WpfAsyncCollection
{
    public class AsyncObservableCollection<T> : ObservableCollection<T>
    {
        public override event NotifyCollectionChangedEventHandler CollectionChanged;
        private static object _syncLock = new object();

        public AsyncObservableCollection()
        {
            enableCollectionSynchronization(this, _syncLock);
        }

        protected override void OnCollectionChanged(NotifyCollectionChangedEventArgs e)
        {
            using (BlockReentrancy())
            {
                var eh = CollectionChanged;
                if (eh == null) return;

                var dispatcher = (from NotifyCollectionChangedEventHandler nh in eh.GetInvocationList()
                                  let dpo = nh.Target as DispatcherObject
                                  where dpo != null
                                  select dpo.Dispatcher).FirstOrDefault();

                if (dispatcher != null && dispatcher.CheckAccess() == false)
                {
                    dispatcher.Invoke(DispatcherPriority.DataBind, (Action)(() => OnCollectionChanged(e)));
                }
                else
                {
                    foreach (NotifyCollectionChangedEventHandler nh in eh.GetInvocationList())
                        nh.Invoke(this, e);
                }
            }
        }

        private static void enableCollectionSynchronization(IEnumerable collection, object lockObject)
        {
            var method = typeof(BindingOperations).GetMethod("EnableCollectionSynchronization", 
                                    new Type[] { typeof(IEnumerable), typeof(object) });
            if (method != null)
            {
                // It's .NET 4.5
                method.Invoke(null, new object[] { collection, lockObject });
            }
        }
    }
}

A weekly round-up of database technology news and articles covering new developments, SQL, NoSQL, document databases, graph databases, and more. 

Using GitHub can be a little intimidating, but it's a better approach for source control. Today, I provide a collection of links to get you started with GitHub to help you understand it better.