This is the first of an eight part series where I am joined by Phil Japikse to discuss design patterns. A design pattern is a best practice you can use in your code to solve a common problem. In this episode, Phil demonstrates the Command and Memento patterns.
Episodes in this series:
This tough year, 2020, will soon be over at last, which means it's time to look back at our accomplishments! Over the year, the PVS-Studio team has written quite a number of articles covering a large variety of bugs found in open-source projects with the help of PVS-Studio. This 2020 Top-10 list of bugs in C# projects presents the most interesting specimens. Enjoy the reading!
show how easy it is to add real-time functionality to your web applications using ASP.NET Core SignalR. They discuss topics such as targeting with clients, SignalR transports, and options for running your SignalR application in the cloud.
Now, you can even leverage the Hub protocol spec is the available on GitHub if you're interested in creating your own SignalR client.
try {
int i=0;
string s = "hello";
i = Convert.ToInt32(s);
} catch (Exception ex)
{
Console.WriteLine("Error");
}
Console.WriteLine("I am here!"); public static int GetMyInt()
{
try {
for (int i=10;i>=0;i--)
Console.WriteLine(10/i);
return 1;
} catch
{
Console.WriteLine("Error!");
}
finally {
Console.WriteLine("ok");
}
Console.WriteLine("can you reach here?");
return -1;
} public static int GetMyInt()
{
try {
for (int i=10;i>=1;i--)
Console.WriteLine(10/i);
return 1;
} catch
{
Console.WriteLine("Error!");
}
finally {
Console.WriteLine("ok");
}
Console.WriteLine("can you reach here?");
return -1;
} public int GetUserId(string nickname)
{
SqlConnection connection = new SqlConnection(...);
SqlCommand command = connection.CreateCommand();
command.CommandText = "select id from users where nickname like @nickname";
command.Parameters.Add(new SqlParameter("@nickname", nickname));
try {
connection.Open();
return Convert.ToInt32(command.ExecuteScalar());
}
catch(SqlException exception)
{
// some exception handling
return -1;
} finally {
if (connection.State == ConnectionState.Open)
connection.Close();
}
// if all things works, you can not reach here
} 
My simpleAddon could not be verified for use in firefox. proceed with caution
The IBM Swift Sandbox is an interactive website that lets you write Swift code and execute it in a server environment – on top of Linux! Each sandbox runs on IBM Cloud in a Docker container. In addition, both the latest versions of Swift and its standard library are available for you to use.
The following OData-related projects are now on GitHub:
