How to count lists inside another list List>>

Question

Now this is example list :

List<List<KeyValuePair<string, double>>> dblWordFreqByCluster = 
    new List<List<KeyValuePair<string, double>>>();

What i want is getting the list count at this main list (dblWordFreqByCluster). Which means getting count of List<KeyValuePair<string, double>> lists.

I can count them via making foreach iteration which i don't want to because i suppose that would cause unnecessary performance loss.

using foreach will likely not affect performance. Linq is likely to be slower but more compact. Maybe you can consider wrapping KeyValuePair inside a class with a count property as well. It might help cleanup things. — NoviceProgrammer, Apr 05 '12 at 12:47

score 15 · Answer 1 · answered Apr 05 '12 at 11:55

15

Using LINQ you could do

int totalCount = dblWordFreqByCluster.Sum(c => c.Count);

However, that isn't much different than using a foreach loop, but it would be less verbose and just as easy to read.

answered Apr 05 '12 at 11:55

Adam Gritt

2,654
18
20

score 2 · Accepted Answer · answered Apr 05 '12 at 11:53

2

A simple:

 List<List<KeyValuePair<string, double>>> dblWordFreqByCluster = new List<List<KeyValuePair<string, double>>>();
 int count = dblWordFreqByCluster.count;

Should work...

Edited: I thought it was java ;)

answered Apr 05 '12 at 11:53

Philippe

103
1
7

It was working :D I thought it was going to count all of the elements not the lists. – Furkan Gözükara Apr 05 '12 at 11:56

How to count lists inside another list List>>

2 Answers2