Search code examples
c#arraysperformanceconsole.writeline

Using String.Join in order to print a C# array - Performance

I want to print an array via Console.writeline. I'm lazy and want to do it in one line, avoiding iterating through all the array.

Here is my code:

var costumers = new Costumers[10];

// Array initialization...

Console.WriteLine("Initial array: '{0}'",string.Join(Environment.NewLine,costumers.ToList()) );

Array.Sort(costumers);

Is it OK to use String.Join for this purpose or it decreases performance dramatically? Is there an elegant way to do it?

Thanks, Paul

Solution

  • There is absolutely nothing wrong with using String.Join: the method is so straightforward that there is hardly anything that could go wrong implementing it. All you need is a StringBuilder, a single loop, and a bool flag to skip pre-pending the separator the first time around.

    You could slightly improve your code by removing ToList() from the call, because Join accepts IEnumerable<T>:

    Console.WriteLine("Initial array: '{0}'", string.Join<Costumer>(Environment.NewLine, costumers) );