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smoak/gist:1946279

Forked from TheDahv/gist:1946234
Created March 1, 2012 00:49
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gistfile1.cs
var groupedByWeek = new List<DateTime> {
new DateTime(2012, 02, 01),
new DateTime(2012, 02, 02),
new DateTime(2012, 02, 06),
new DateTime(2012, 02, 13)
}.
GroupBy(s => s.DayOfYear / 7).
.Select(s => new {Date=s.First(), Amount=s.Count()})
.ToDictionary(s => s.Date, s => s.Amount);
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