Question

I have a set of data that requires some processing but I want to split the work available threads. How can I change this into a single instruction, preferably removing the for-loop?

string[] keysForThread;
IEnumerable<string> allData;
List<string> dataForSingleThreadToProcess;

for (int i = 0; i < keys.length; i++)
    dataForSingleThreadToProcess.AddRange(allData.Where(x => x.StartsWith(keys[i])));

I don’t mind changing the string[] keysForThread into a List and/or the List dataForSingleThreadToProcessinto an IEnumerable.

Answer 1

It sounds like you want:

var data = allData.Where(datum => keys.Any(key => datum.StartsWith(key))
                  .ToList();