Find Item in ObservableCollection without using a loop

Question

Currently i have the following syntax (list is a list containing objects with many different properties (where Title is one of them):

for (int i=0; i < list.Count; i++) {    if(title == list[i].Title)    {     //do something    } } 

How can i access the list[i].Title without having to loop over my entire collection? Since my list tends to grow large this can impact the performance of my program.

I am having a lot of similar syntax across my program (accessing public properties trough a for loop and by index). But im a sure there must be a better and elegant way of doing this?

The find method does seem to be a option since my list contains objects.

Answer 1

I Don't know what do you mean exactly, but technially speaking, this is not possible without a loop.

May be you mean using a LINQ, like for example:

list.Where(x=>x.Title == title) 

It's worth mentioning that the iteration over is not skipped, but simply wrapped into the LINQ query.

Hope this helps.

EDIT

In other words if you really concerned about performance, keep coding the way you already doing. Otherwise choose LINQ for more concise and clear syntax.

Answer 2

Here comes Linq:

var listItem = list.Single(i => i.Title == title); 

It throws an exception if there's no item matching the predicate. Alternatively, there's SingleOrDefault.

If you want a collection of items matching the title, there's:

var listItems = list.Where(i => i.Title ==  title);