public static IEnumerable <string> SumRecords(
DataSource dataSource,
ISumFormatter formatter)
{
return(dataSource.ReadIntRecords(16)
.Select(args => formatter.Format(args, args.Sum())));
}
public void ProcessOld()
{
using (var input = openDatasource())
using (var writer = new StreamWriter(outputFilename))
{
var c = 0;
while (true)
{
string[] record = input.NextRecord();
if (record == null)
{
break;
}
c++;
var nums = record.Select(part => Convert.ToInt32(part, 16)).ToArray();
var sum = nums.Sum();
var text = formatter.Format(nums, sum);
writer.WriteLine(text);
if (c % 100 == 0)
{
Console.WriteLine("processed {0} items", c);
}
}
}
}