I have an ArrayList of objects of my custom class. I would like to know, if ArrayList contains object with certain attribute. I do not care about the object, just if there is some. Yes, I could do this with foreach cycle, but I was wondering if there was more elegant way to do so.
Thanks for suggestions.
Well, to start with I'd suggest using List<T>
instead of ArrayList
. Then LINQ to Objects makes it really easy:
if (list.Any(x => x.HasFoo))
{
}
Or without LINQ (but still List<T>
)
if (list.FindIndex(x => x.HasFoo) != -1)
{
}
If you really need to stick with a non-generic collection but have LINQ to Objects available too, you can use:
if (arrayList.Cast<YourType>().Any(x => x.HasFoo))
{
}
use Linq:
var query = from o in yourarray select o where o.atribute==ValueIWant;
`query.Count()` will return the number of objects that fit the condition.
check that msdn example: Linq example
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