/// <summary>
/// Safely aggregates the items emitted by the given pipe. If the pipe is null
/// or has no elements the default value will be returned.
/// </summary>
/// <typeparam name="T">The type of the items emitted by the pipe.</typeparam>
/// <param name="SourcePipe">A pipe.</param>
/// <param name="DefaultValue">The default value to return for an empty pipe.</param>
public static T Aggregate <T>(this IEndPipe <T> SourcePipe,
T Prefix,
Func <T, T> Map,
Func <T, T, T> Reduce,
T Suffix,
T DefaultValue = default(T))
{
if (SourcePipe == null)
{
return(DefaultValue);
}
try
{
return(Reduce(Reduce(Prefix, SourcePipe.Select(Item => Map(Item)).Aggregate(Reduce)), Suffix));
}
catch (Exception e)
{
return(DefaultValue);
}
}
