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1 vote

1 answer

227 views

Abstract base classes and mix-ins in python

Luke L

103

answered 5 hours ago

1 vote

3 answers

162 views

In "Liskov Substitution Principle", is "invariants can't be weakened in a subtype" a kind of "postconditions can't be weakened in a subtype"?

Greg Burghardt

39.3k

modified 20 hours ago

7 votes

8 answers

4k views

Is "avoid extra null pointer risk" a reason to avoid "introduce parameter objects"?

Doc Brown

210k

modified 2 days ago

1 vote

1 answer

264 views

Mapping complex objects to other similar complex objects

PPC Pixel

1

modified Jul 19 at 11:07

3 votes

3 answers

2k views

optional data in the constructor, bad practice?

Prerak Jain

103

modified Jul 18 at 16:31

7 votes

6 answers

516 views

Should a Car object be responsible for checking if it is able to run on certain Road objects?

Martin Spamer

538

modified Jul 18 at 16:29

5 votes

4 answers

2k views

If class B extends A, can we say that B depends on A?

TheJavaGuy-Ivan Milosavljević

231

modified Jul 16 at 10:56

0 votes

1 answer

195 views

Using the objects retrieved at the time of request validation

CommunityBot

1

modified Jul 15 at 20:03

16 votes

7 answers

43k views

What is the better way to escape from too many if/else-if from the following code snippet?

gnasher729

46.3k

answered Jul 12 at 14:38

1 vote

1 answer

826 views

Can a class factory also save the object to a database?

Martin Spamer

538

modified Jul 12 at 10:50

4 votes

1 answer

5k views

Where should variables be declared

Doc Brown

210k

modified Jul 3 at 18:14

62 votes

8 answers

28k views

LSP vs OCP / Liskov Substitution VS Open Close

Doc Brown

210k

modified Jul 3 at 15:41

10 votes

2 answers

12k views

Static factory method in base class

Doc Brown

210k

modified Jul 3 at 15:31

7 votes

2 answers

397 views

Difficulty making this class open-closed

Doc Brown

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modified Jul 3 at 15:29

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Abstract base classes and mix-ins in python

In "Liskov Substitution Principle", is "invariants can't be weakened in a subtype" a kind of "postconditions can't be weakened in a subtype"?

Is "avoid extra null pointer risk" a reason to avoid "introduce parameter objects"?

Mapping complex objects to other similar complex objects

optional data in the constructor, bad practice?

Should a Car object be responsible for checking if it is able to run on certain Road objects?

If class B extends A, can we say that B depends on A?

Using the objects retrieved at the time of request validation

What is the better way to escape from too many if/else-if from the following code snippet?

Can a class factory also save the object to a database?

Where should variables be declared

LSP vs OCP / Liskov Substitution VS Open Close

Static factory method in base class

Difficulty making this class open-closed

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