c# comparing two lists of integers in c#

Question

I have two lists that is

List<int> comments ;
List<int> no_checks;

Now i would like to see if all no_checks have comments. So during my processing of data whenever a comment is added am adding its id to comment list and when a no radio is selected am adding its id to no_checks

So a sample output to console has

1.

 below should return false;
 comment=[12, 13,15]
 no_checks = [12,13,15,17 ] //one no has no comment

2

 below should return true  
 comment=[12, 13,15]
 no_checks = [12,13 ] //all have comments

So am stuck here

public bool allnoHaveComments(){
 var allhave=true;

 for(var i=0; i<no_checks.count; i++){ 
    //if one no_checks is not contained in comments allhave=false

  }
  return allhave;
 }

How can i proceed to compare and check to see that id's in no_checks are all contained in comments else if they are not return false

How can i go about this

Does order matter? If not, then you might consider using `HashSet` instead of `List`. A hashset represents a set of unordered things, and directly supports operations like the one you want. — Eric Lippert, Jul 24 '17 at 18:01

score 3 · Accepted Answer · answered Jul 24 '17 at 17:56

3

bool isallnoHaveComments= !no_checks.Except(comment).Any();

answered Jul 24 '17 at 17:56

Sajeetharan

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1

You should mention about how is a comment created by no one :)) – Jul 24 '17 at 17:58

score 1 · Answer 2 · answered Jul 24 '17 at 17:56

1

This gives you the values in no_checks that aren't in comments

no_checks.Except(comments)

Your problem is basically Check whether an array is a subset of another.

answered Jul 24 '17 at 17:56

Nathan Cooper

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c# comparing two lists of integers in c#

2 Answers2