Find the most frequent numbers in an array using LINQ
c#, linq
Solution
The key here is using `Enumerable.GroupBy` and the aggregation method `Enumerable.Count`:
List<int> list = new List<int>() { 1,1,2,2,3,4,5 };
// group by value and count frequency
var query = from i in list
group i by i into g
select new {g.Key, Count = g.Count()};
// compute the maximum frequency
int whatsTheFrequencyKenneth = query.Max(g => g.Count);
// find the values with that frequency
IEnumerable<int> modes = query
.Where(g => g.Count == whatsTheFrequencyKenneth)
.Select(g => g.Key);
// dump to console
foreach(var mode in modes) {
Console.WriteLine(mode);
}
Problem
``` List<int> a = new List<int>{ 1,1,2,2,3,4,5 }; ``` What's the quickest way to do this with LINQ? I'm new to LINQ