predicate

I have a Core Data project and am having difficulty searching the data with a simple calculated field and have no idea why it's not working. I have a Tutor entity, with core data string attributes "tutorFirstName" and "tutorLastName". I've created an additional string attribute "tutorFullName" which is populated in a Category as such: NSString *fullName = [@[self.tutorFirstName, self.tutorLastName] componentsJoinedByString:@" "]; The data is populated fine, but when I perform the following searches only the predicates on the tutorFirstName and tutorLastName work: NSPredicate *predicate =

I have viewed numerous predicate questions, I have read the docs and nothing seems to be jumping out as an answer my problem. I have a Core Data entity named Materials and I have the Attributes category , subcategory and description . I have three UITableViewControllers and in each I want to use a predicate to display as follows: TableViewController 1: Only the categories (no repeating of category names) Select a category and go to TableViewController 2. TableViewController 2: Display Subcategories (no repeating of subcategory names) Select a subcategory and go to TableViewController 3 listing

This question is a continuation of: How to check whether an input conforms to an arbitrary amount of rules in Java? I'm trying to make use of Predicates to cross-check a string/word against a set of rules/methods that return a boolean value. However I'm having difficulties implementing it in my code. public class CapValidator { /** PRIMARY METHODS **/ private boolean capitalize(String word) { // boolean valid = true; // for (Predicate<> rule : rules) { // valid = valid && rule.test(word); // } return false; } /** SUPPORT METHODS **/ private boolean isNoun(String word) { // do some logic }

I want to write code like the following - public IQueryable<Invoice> InvoiceFilterForMonthAndYear(DateTime? monthAndYear = null) { var invoices = _invoices.Where(MonthAndYearPredicate(monthAndYear); return invoices; } private bool MonthAndYearPredicate(Invoice invoice, DateTime? monthAndYear) { //code to check if the invoice start or end dates is from the falls in the month I am checking for } But I can't use a predicate like that because the predicate expects just one parameter. I know I could write a Where clause in InvoiceFilterForMonthAndYear to do the work, but I want to put the logic for

My application contains a TextField and a ListView . The TextField allows users to enter search terms that will filter the contents of the ListView as they type. The filtering process will match several fields within each DataItem in the ListView and return the results if any of them match. What I want to do, however, is have those results prioritize items that match one particular field over the others. For example, in the MCVE below, I have two items: Computer and Paper . The Computer item has a keyword for "paper," so searching for "paper" should return Computer as a result. However, since