Questions tagged [derived-attribute]
5 questions
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vote
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Core Data Derived Attributes with a sum function
I have two entities in my app: User & Expense. A user has many expenses. Expense as an attribute amount (of type Int32).
I added a derived attribute expensesCount (of type Int16) on the user to count the number of expenses, using the derivation…
alpennec
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Core Data derived attribute not calculated properly on first use?
I have Company entity in Core Data that has relationship one-to-many Activities
I've added there derived property to Company
activities.@count
but then accessing in SwiftUI view this property gives me invalid result. It usually works ok but on…
Michał Ziobro
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How to create a derived attribute in SQL (Oracle Application Express)
I am trying to create a derived attribute (Number of seasons derived from first season). I think I need to create a view, but I am not sure.
Below is my code:
Create Table Officials(
Fname varchar2(15) not null,
Lname varchar2(15) not null,
Sport_ID…
MostevilJoeJoe
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What can't I print out the value of a instance attribute derived from other instance attributes?
I'm pretty new to Python and I would be really grateful if someone could help me out with this issuer I'm facing.
This is my code:
class Player:
def __init__(self, name):
self.name = name
self.info = {}
self.info_count =…
summer_soldier
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SQLITE - dealing with derived attributes
I am a CS student trying to build an app to store the grades of my dear colleagues. To do that I will be using SQLite to store the grades. In my database, there will be a table called Student (each one of my colleagues), a table Course (the courses…
Cyber World
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