Iterar over array of entity and get value of some key based on value of “other key” matche

Question

I have an array of entity class (eg SubmittedAnswer). Its JSON format is look like as below.

---

{
\"submittedAnswers\": [{
    \"submittedQuestionId\": \"C7B3         


        

Answer 1

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"submittedQuestionId == %@", yourSubmittedQuestionId];
NSArray *filteredArray = [myArray filteredArrayUsingPredicate:predicate];
id firstFoundObject = nil;
if ([filteredArray count] > 0) {
    firstFoundObject = [filteredArray objectAtIndex:0];
}

Please make sure your SubmittedAnswer class has property submittedQuestionId