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I basically want to go through the 2d List<> and deposit the sum of the items in a column to a 1d List. So far have a double for loop but I cant figure out the logic. Any help with how I can start to contruct it logically would be helpful. Thank you. This is the code I have so far:

chicacherry
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  • Hello and welcome to SO! To improve your chances of getting an answer please read [How do I ask a good question](https://stackoverflow.com/help/how-to-ask) and please update your post to include a [Minimal, Reproducible Example](https://stackoverflow.com/help/minimal-reproducible-example). – Trevor Nov 16 '21 at 20:46
  • Questions that ask "where do I start?" are typically too broad and are not a good fit for this site. People have their own method for approaching the problem and because of this there cannot be a _correct_ answer. Give a good read over [Where to Start](//softwareengineering.meta.stackexchange.com/a/6367) and [edit] your post. – gunr2171 Nov 16 '21 at 20:47
  • Post how you trying to do and the incorrect results you have. – Henryk Budzinski Nov 16 '21 at 21:11
  • Thank you for ur input. I edited my code so hopefully its clearer now. – chicacherry Nov 16 '21 at 21:56

1 Answers1

1

So if you have this:

var grid = new List<List<int>> {
  new() { 1,2 },
  new() { 3,4 }
}

You can do:

grid.Pivot().Select(c => c.Sum());

And you'll get an enumerable that is { 4, 6 } (1+3 and 2+4)

You can get Pivot from fubo's answer here (or choose any one of the other suggested transforms)

If I misunderstood and you wanted {3,5} just skip the Pivot part

Caius Jard
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