What is the C# extension methods equivalent for this Linq query?
In this example:
public void Linq40()
{
int[] numbers = { 5, 4, 1, 3, 9, 8, 6, 7, 2, 0 };
var numberGroups =
from n in numbers
group n by n % 5 into开发者_StackOverflow g
select new { Remainder = g.Key, Numbers = g };
foreach (var g in numberGroups)
{
Console.WriteLine("Numbers with a remainder of {0} when divided by 5:",
g.Remainder);
foreach (var n in g.Numbers)
{
Console.WriteLine(n);
}
}
}
What is the pure c# equivalent? I get this...
var numberGroups = numbers.GroupBy(n => n % 5)...
but the into
clause is a bit of a mystery, and I can't figure out how to get the Key
from the Select
.
GroupBy returns an IEnumerable<T>
of <IGrouping<TKey, TSource>
. With this, you can do a second Select operation, which returns values exactly like above:
var numberGroups = numbers.GroupBy(n => n % 5)
.Select(g => new { Remainder = g.Key, Numbers = g });
numbers.GroupBy(n => n % 5).Select(g => new { Remainder = g.Key, Numbers = g });
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