I have a collection of objects and I know that I can sort by NAME (string type)开发者_StackOverflow by saying
collEquipment.Sort((x, y) => string.Compare(x.ItemName, y.ItemName));
that WORKS.
But I want to sort by a ID (integer type) and there is no such thing as Int32.Compare
So how do I do this? This doesn't work
collEquipment.Sort((x, y) => (x.ID < y.ID)); //error
I know the answer is going to be really simple. Lambda expressions confuse me.
collEquipment.Sort((x, y) => y.ID.CompareTo(x.ID));
Here you go, sort a list against any property that implements IComparable[<T>]
(which int
does):
public static class ListExtensions {
public static void Sort<TSource, TValue>(
this List<TSource> list,
Func<TSource, TValue> selector) {
list.Sort((x,y) => Comparer<TValue>.Default
.Compare(selector(x),selector(y)));
}
}
Now:
collEquipment.Sort(x => x.ItemName);
or
collEquipment.Sort(x => x.ID);
try this
collEquipment.Sort((x, y) => y.ID - x.ID);
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