The abstraction tag has no wiki summary.
4
votes
2answers
266 views
Is there a name for being able to quickly find the relevant code?
I notice that a property of codebases that I like hacking on is that it's quick to find the relevant code for some feature, without knowing much about the code base at all. For example, searching for ...
7
votes
5answers
596 views
Why does Java use so many middlemen?
For example to read data from a website we do:
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = ...
1
vote
1answer
85 views
Using a DAO to abstract our ORM from the rest of the application
We're using MySQL with Sequelize.js as the ORM.
What we're wondering is whether a DOA layer of abstraction is worthwhile. Here are our options:
To use the Sequelize models throughout the ...
-5
votes
1answer
118 views
An Abstractionist that seeks to become an implementationst [closed]
I'm an abstractionist (I suppose), I am not very fond of implementing things unless they pose some challenges other than Do-It-Fast, rather I very much enjoy refactoring the code, viewing it from some ...
10
votes
6answers
506 views
What changes are too big to be made easy by proper design?
This is a rather vague question, but it's something I've never felt has been answered in a satisfactory way when reading about proper design.
Generally, when learning about Object Oriented ...
19
votes
6answers
1k views
Do frameworks put too much abstraction?
I've been programming for a little under a year and have some experience writing systems applications, web apps, and scripts for businesses/organizations. However, one thing I've never really done is ...
8
votes
11answers
3k views
Why do “data types” in computers exist, if it's really all just bits? [closed]
I am confused with the wide array of ways to implement existing data types in hardware as it all seems a bit illusory.
For example:
There's no such thing as a software stack or a hardware stack; a ...
7
votes
3answers
98 views
Rules about the concreteness of method parameter types, return types and property types
Some time ago I read a kind of "rule of thumb" about the concreteness of method parameter types, return types and property types, but I just do not remember it.
It said something about keep your ...
2
votes
1answer
219 views
What kind of abstraction/SoC should I use here?
I am starting a new project, and I want to follow the separation of concerns pattern, and I have been reading on the topic, and now I am in doubt of how I should go about this.
Here is how I ...
5
votes
2answers
174 views
How does strengthening of pre conditions and weakening of post conditions violate Liskov Substitution principle?
I read that Liskov substitution principle is violated if :
Pre conditions are strengthened .
Post conditions are eased out.
But I don't get fully yet how these two points would violate Liskov ...
-1
votes
3answers
196 views
How flexible can hardware get? [closed]
This subject is long time in the making for me and it particularly took off when I was researching bootloaders for computers and consumer electronics, which, I will note, differ drastically. I've ...
8
votes
4answers
339 views
Should database queries be abstracted out of the page itself?
When writing page generation in PHP, I often find myself writing a set of files littered with database queries. For example, I might have a query to fetch some data about a post directly from the ...
12
votes
1answer
368 views
Why doesn't Haskell have type-level lambda abstractions?
Are there some theoretical reasons for that (like that the type checking or type inference would become undecidable), or practical reasons (too difficult to implement properly)?
Currently, we can ...
5
votes
1answer
227 views
Abstract Factory Method and Polymorphism
Being a PHP programmer for the last couple of years, I'm just starting to get into advanced programming styles and using polymorphic patterns. I was watching a video on polymorphism the other day, and ...
3
votes
2answers
270 views
Too complex/too many objects?
I know that this will be a difficult question to answer without context, but hopefully there are at least some good guidelines to share on this. The questions are at the bottom if you want to skip the ...
0
votes
1answer
124 views
Is there a way communicate or measure levels of abstraction?
I'll be the first to say that this question is a bit... out there. But here are a couple questions I bear in mind :
Is abstraction continuous or discrete?
Is there a single unit of abstraction?
...
1
vote
3answers
176 views
Should I use an interface when methods are only similar?
I was posed with the idea of creating an object that checks if a point will collide with a line:
public class PointAndLineSegmentCollisionDetector {
public void Collides(Point p, LineSegment s) {
...
-1
votes
1answer
104 views
Using dot to Access Object Attribute and Proper abstraction
I have been programming in python and Java for quite a number of years and one thing I find myself doing is using the setters and getters from Java in Python but a number of blogs seem to think using ...
3
votes
2answers
192 views
I have data that sends in “bursts” of 100 records with a significant delay. How do I structure my classes for multithreading?
My datasource sends information in 100 batches of 100 records with a delay of 1 to 3 seconds between batches.
I would like to start processing data as soon as it's received, but I'm not sure how to ...
6
votes
1answer
288 views
Understanding the levels of computing
Sorry, for my confused question. I'm looking for some pointers.
Up to now I have been working mostly with Java and Python on the application layer and I have only a vague understanding of operating ...
4
votes
1answer
128 views
Is there a standard for machine-readable descriptions of RESTful services?
I've interacted with a few RESTful APIs that provided excellent documentation for humans and descriptive URIs, but none of them seem to return machine-readable descriptions of themselves.
It's not ...
4
votes
5answers
344 views
Should concrete classes avoid calling other concrete classes, except for data objects?
In Appendix A to The Art of Unit Testing, Roy Osherove, speaking about ways to write testable code from the start, says,
An abstract class shouldn't call concrete classes, and concerete classes ...
9
votes
8answers
972 views
Whats the next level of abstraction?
Since programming languages initially only used lines of code executed sequentially, and it evolved into including functions which were one of the first levels of abstraction, and then classes and ...
2
votes
1answer
55 views
Reading data from file and const
Is it sane to let a read method on a file object to be const? For example
size_t read(void* buffer,size_t length) const;
The read method does not change the contents of the file, but updates the ...
3
votes
1answer
152 views
What technology/algorithm should be used to abstract meaning or keywords from a passage of text?
Hi and thanks for looking!
Background
I have a project wherein I need to abstract meaning from a passage of text to determine what the text is seeking and then match that text to a list of search ...
0
votes
1answer
320 views
An alternative to multiple inheritance when creating an abstraction layer?
In my project I am creating an abstraction layer for some APIs. The purpose of the layer is to make multi-platform easier, and also to simplify the APIs to the feature set that I need while also ...
4
votes
2answers
411 views
Is dependency injection by hand a better alternative to composition and polymorphism?
First, I'm an entry level programmer; In fact, I'm finishing an A.S. degree with a final capstone project over the summer. In my new job, when there isn't some project for me to do (they're waiting ...
5
votes
3answers
3k views
Abstract Data Type and Data Structure [duplicate]
It's quite difficult for me to understand these terms. I searched on google and read a little on Wikipedia but I'm still not sure. I've determined so far that:
Abstract Data Type is a definition of ...
-2
votes
2answers
219 views
Is it possible to increase the levels of abstraction I can hold in my head/reason about at once? How would I go about this? [closed]
I'd like to be able to read through fifteen pages of assembly code and know what it does. I'd like to be able to write programs that write programs that write programs that write programs.
We've ...
1
vote
2answers
188 views
Using macro as an abstraction layer
I am having a discussion with a colleague about using macro as a thin (extremely) layer of abstraction vs using a function wrapper. The example that I used is
Macro way.
#define StartOSTimer(period) ...
