public static string ToSeparatedString <T>(
this IEnumerable <T> value,
string separator = ", ",
int groupLength = 1,
ITextFormatter <T>?itemFormatter = default,
string nullPlaceholder = "")
{
var formatter = new SeparatorFormatter <T>(
separator,
groupLength,
itemFormatter,
nullPlaceholder
);
return(formatter.WriteToString(value));
}
public void ExampleTest()
{
var intArray = new[] { 1, 2, 3, 4, 5 };
var formatter = new SeparatorFormatter <int>();
formatter.Write(intArray, Console.Out);
var formatted = formatter.WriteToString(intArray);
Assert.Equal("1, 2, 3, 4, 5", formatted);
// or use the extension method on any IEnumerable<T>
var formattedViaExtension = intArray.ToSeparatedString();
Assert.Equal(formatted, formattedViaExtension);
Assert.Equal("one, two, three", new [] { "one", "two", "three" }.ToSeparatedString());
}
