darkiri

• Scala syntax 5 questions - should be enough (?), there are question for beginner, intermediate and more advanced stuff. If not enough, more possible themes: type tags, dependent types...
  • How well do you know Option/Try/Either types from Scala standard library?
    • I heard about them, but I don't see clear benefits
    • I use them and understand the benefits, but I struggle with them
    • I fully understand why we use them and have no problems with them
  • How do you get and combine values from those types mentioned above?
    • I don't
    • I use map/flatMap most of the time
• I try using for-comprehension most of the time

darkiri

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Linq.Expressions;

namespace MongoDB.Migrations
{
    public class MigratableObject : ISupportInitialize
    {

darkiri

var events = db.GetCollection("events");
events.Insert(new Event {Id = "1", Payload = 2});
events.Insert(new Event {Id = "1", Payload = 3}, SafeMode.True);

darkiri

[Subject("Mongo")]
public class when_issuing_an_update_on_a_changed_entity : mongo_context
{
    private static long DocumentsAffected;

    private Establish context = () => SetUpDatabase();
    private Because of = () => DocumentsAffected = UpdateSameObjectTwice();
    private It should_not_affect_any_documents = () => Assert.That(DocumentsAffected, Is.EqualTo(0));

    private static long UpdateSameObjectTwice()

darkiri

[Subject("Raven Experiments")]
public class when_storing_two_objects_with_same_id_in_separate_sessions : raven_persistence_context
{
    static Exception Exception;

    Because of = () => Exception = Catch.Exception(CreateTwoObjectsInTwoSessions);
    It should_throw_concurrency_exception = () => Exception.ShouldBeOfType<ConcurrencyException>();

    static void CreateTwoObjectsInTwoSessions()
    {

darkiri

[Subject("Raven Experiments")]
public class when_updating_same_object_in_separate_sessions : raven_persistence_context
{
    static Exception Exception;

    Establish context = () => StoreSingleObject(new MyClass {Text = "this one"});
    Because of = () => Exception = Catch.Exception(UpdateTwoObjectsInTwoSessions);
    It should_throw_concurrency_exception = () => Exception.ShouldBeOfType<ConcurrencyException>();

    static void UpdateTwoObjectsInTwoSessions()

darkiri

typeof (Convert)
 .GetMethods(BindingFlags.Static|BindingFlags.Public)
 .Where(m=>m.Name.StartsWith("To"))
 .Select(m=>m.GetParameters().First().ParameterType)
 .Distinct()