# init(leftExpressions:rightExpressionAttributeType:modifier:operators:options:) Initializes and returns a “pop-up-pop-up-view”–style row template. ``` init(leftExpressions: [NSExpression], rightExpressionAttributeType attributeType: NSAttributeType, modifier: NSComparisonPredicate.Modifier, operators: [NSNumber], options: Int) ``` ## Parameters `leftExpressions` An array of objects that represent the left side of a predicate. `attributeType` An attribute type for the right side of a predicate. This value dictates the type of view created, and how the control’s object value is coerced before putting it into a predicate. `modifier` A modifier for the predicate (see for possible values). `operators` An array of objects specifying the operator type (see for possible values). `options` Options for the predicate (see for possible values). ## Return Value A row template initialized using the specified arguments. ## Discussion The type of `attributeType` dictates the type of view created. For example, creates an [`NSDatePicker`](/documentation/AppKit/NSDatePicker) object, creates a short text field, and produces a longer text field. You can resize the views as you want. Predicates do not automatically coerce types for you. For example, comparing a number to a string will raise an exception. Therefore, the attribute type is also needed to determine how the control’s object value must be coerced before putting it into a predicate. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)