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0votes
2replies
57views
Is it possible to use Static_Predicate with a record type?
I wanted to define a record type with a Static_Predicate:-- irregular_matrices.adsgeneric type Element_Type is private;package Irregular_Matrices is subtype Index_Type is Positive; ...
3votes
2answers
130views
How to properly constrain two-dimensional array types to be square in Ada?
I'm trying to create a package of generic adjacency matrices to define graphs, and the first goal is to define a static version based on two-dimensional array:with Ada.Containers.Vectors;generic ...
0votes
2answers
102views
Hibernate specification with parentheses
I am trying to create a Hibernate specification with parentheses but was not able to do it.I have many specifications. My problem is with the following specification:public static Specification<...
- 9,085
0votes
1answer
165views
SwiftData runtime crash using Predicate macro with protocol-based generic model
I'm working with SwiftData and trying to share logic across multiple models using protocols and protocol extensions.I’ve created some common protocols like Queryable, StatusRepresentable, and ...
- 1,381
2votes
1answer
56views
DB2 LUW Why does use of a cursor predicate generate an error?
I confirmed the following syntax in the DB2 LUW v11.5 manual (we are running DB2 LUW v11.5.9). And apparently this syntax has been supported at least since v9.7! This is in a stored procedure and, ...
- 153
0votes
0answers
48views
Why is Predicate macro in Swift not working? [duplicate]
I am working on a wallet application and I have the models transaction and wallet. Transaction has an extension enum Transaction.Kind which has case deposit and withdrawal. I want to filter the ...
0votes
0answers
57views
Parsing Swift Predicates into Database Statements with PredicateExpressions
ContextI am attempting to take a Swift Predicate created with the #Predicate macro and parse it into a database query statement. (SwiftData does this under the hood to query the underlying SQLite ...
- 6,035
0votes
1answer
173views
Swift #Predicate Macro Crashes for Multiple KeyPath Components
ContextI'm attempting to create a Swift Predicate using the #Predicate macro as shown here:final class Foo { var title: String = "" var name: String = ""}let p = #...
- 6,035
0votes
0answers
77views
How do I write a predicate to compare multiple many to many items to each other?
I am trying to return a list of items that may match multiple tagsFor example given below:item1 with tag1 and tag2item2 with tag1 only.If I have tag1 and tag2 selected I would like to return only ...
- 12.4k
-1votes
2answers
118views
return type narrowing from array of predicates
classes with static check methods. wanted to find thematching one and return to it in wrap method.this architecture perfectly suits for my need of OOP-ifying.here is the way that I used to do it in ...
0votes
0answers
28views
CoreData Predicate for empty NSSet (One-to-Many relationship) [duplicate]
I have a CoreData entity called Item, which may or may not contain Properties. I would like to fetch all Items that have not yet been assigned any Properties.extension Item { @nonobjc public ...
- 496
1vote
0answers
83views
Java Stream Filter Predicate allowing wrong itens [duplicate]
fellows.To be short: I need to filter a List to have just itens who have differences on some fields.This is because I need to show to the Auditor the differences on the Object throught the time.I ...
0votes
1answer
102views
Java: Remove a collection of objects (for ex the info about a vehicle with ID xxx) from a list and return removed objects to new list
I want to remove a collection of objects from a List, the removed objects should be added to new list and returned. The expected return of removed object (car) when outprinted look like for ex:[...
1vote
2answers
148views
Why does listp in SBCL Common Lisp return T for a non-list cons cell?
Global variable a is a cons cell, but NOT a list. Why does LISTP return T for it?* (defvar a (cons 1 2))A* a(1 . 2)* (listp a)TEdit: Thanks to Gwang-Jin Kim for a function to substitute for ...
- 7,111
0votes
1answer
60views
Spring Data specifications with correlated subquery
How one using spring data specifications can do the equivalent of this:select a.*, (select count(1) from b where b.a_id = a.id) as countfrom a;If this is not possible is there an equivalent?
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