How do I filter an array with AngularJS and use a property of the filtered object as the ng-model attribute?

Question

If I have an array of objects, and I want to bind the Angular model to a property of one of the elements based on a filter, how do I do that? I can explain better with a con

Answer 1

Applying same filter in HTML with multiple columns, just example:

 variable = (array | filter : {Lookup1Id : subject.Lookup1Id, Lookup2Id : subject.Lookup2Id} : true)

Answer 2

<div ng-repeat="subject in results.subjects | filter:{grade:'C'}">
    <input ng-model="subject.title" />
</div>