Questions about problem solving and planning for a solution through software design.

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188
votes
16answers
14k views

Started wrong with a project. Should I start over?

I'm a beginner web developer (one year of experience). A couple of weeks after graduating, I got offered a job to build a web application for a company whose owner is not much of a tech guy. He ...
2
votes
3answers
228 views

Sequence diagrams and the Implementation

In the design phase we create UML Sequence diagrams (in OOD). My understanding is that after creating an Use Case diagram if we need to show further information in terms of time sequence of events of ...
-1
votes
1answer
88 views

Decomposing a system in to sub systems, modules and components [closed]

This question is about how should a large system be decomposed to sub systems, modules , components etc. For example lets say in a Payroll solution there may be core areas like Attendance, Salary ...
0
votes
2answers
266 views

how to approach pharmacy software project [closed]

I would like to complete a pharmacy software proof concept. But I have a few questions I do not know. Physician information In order to refill or dispense a new RX the software needs to have access ...
4
votes
5answers
2k views

Is this a good practice or not?

I have a colleague who has come up with a way of 'genericizing' information from a database so that all his web application's drop-down lists can share the same object in his MVC.NET C# code and ...
0
votes
1answer
105 views

Developing pages in MVC website that will be specifically used as an iframe by another website

I have a website where I'm going to be partnering with another website. They want to view one specific page of mine, in their [WordPress] website. They aren't developers, so I looked into how to do ...
10
votes
6answers
1k views

Designing database related methods, which is better to return: true/false or row affected?

I have some methods that perform some data changing in a database (insert, update, and delete). The ORM I'm using return row-affected int values for those type of method. What should I return for "my ...
1
vote
4answers
155 views

MySQL Database design - Opinions

Im working on a web Application for our bussiness with my brother. Our application its pretty simple, will be develop with php and mysql. Clients and providers ABMs Articles Inventory (we do not ...
3
votes
2answers
144 views

Program Design clearness vs convenience

I've recently disputed with my colleague about the following situation: I've developed a framework that processes the resources (in java, although its not really important). It goes (simplified, ...
4
votes
3answers
84 views

Returning results of method on batch list?

The title is a bit vague so I'll try to elaborate. I have a function makeFoo(int bar) -> returns Foo or throws Exception. I also have a batch version of this makeFoos(int[] bars) -> ...
6
votes
0answers
311 views

How to manage a relatively large one-man project? [duplicate]

I am basically working on https://github.com/KirisurfProject/ entirely alone. This is around 4000 lines of Go code, plus around 1000 lines of Racket (a Lisp) code for the GUI part; the equivalent in ...
0
votes
1answer
82 views

Locking database records

What I have right now: A table with lot of records. About 200 users can select a record according to some rules based on the data in each record. There is a high chance that 2 or more users will ...
1
vote
1answer
153 views

How to structure a program into classes [closed]

So after a while of working in programming field I still haven't figured it out how exactly should programs be structured, in a large set I mean. Which I think it's also because of working in an ...
1
vote
2answers
57 views

Alias variable vs multiple use of getter

Would you rather: $this->getDoctrine()->getManager()->persist($currency); $this->getDoctrine()->getManager()->persist($user); $this->getDoctrine()->getManager()->flush(); ...
0
votes
1answer
96 views

Automatically create or update object in database

I have a database class with the following interface: public Database { //returns false if p (its ID) is already available //otherwise adds p the the list and returns true public boolean ...
-2
votes
1answer
113 views

How can we make a certain thing inbuilt in c language with our own header file?

I want to make the basic trigonometric functions in maths inbuilt functions using my own header file . so as the users can do trigonometry in c language compilers.
1
vote
3answers
177 views

Redundant function to clarify purpose? [duplicate]

Since what matters is not how the code does it but what it does, would you consider wrapping a function with a different name just to clarify it's behavior in certain situations a good practice? ...
1
vote
1answer
143 views

How to design extension mechanism for java app

I have an application where I have a set of core features. The application itself HAS to work in core only mode. I would also want to make the application extensible such that, when certain ...
1
vote
1answer
182 views

What is a good practice to push notifications in a “near real-time” delay in this case?

I want to enable some real-time notifications about friend's activities (social network). Technical context is: Webapp calling backend (REST API's). Scenario is: Kevin follows Bob. When Bob ...
1
vote
2answers
337 views

Entirely separate business logic layer from MVC

We are currently refactoring our controller methods in ASP.NET MVC application. At the beginning we've separated data access layer (our goal was to remove LINQ from controllers entirely). Now we are ...
1
vote
2answers
79 views

How to handle enums in an indirection with functionpointers at ANSI-C?

Moinsen, I am somehow stucked in a design problem. Language is ANSI-C. Lets assume we have a tinkerbox of software-modules: one module for the logic Logic (at least) one module doing some logging ...
0
votes
1answer
113 views

Should I persist notification before or after publishing it through Redis pub/sub?

I'm implementing a mechanism to notify a group of users about newly inserted blog comments. The architecture uses the Redis Pub/Sub mechanism. By definition, the pub/sub mechanism aims to propagate ...
1
vote
3answers
116 views

Passing two different types down a chain of calls because of an overload further down

I've got myself into a bit of a mess. I've got code coming from Main, through myMethod and down to OtherMethod. One of the parameters can be either an int or a string, which affects OtherMethod but ...
0
votes
2answers
347 views

Can this code be made more concise? [closed]

I came across some code recently where in many, many places, expression evaluations were being assigned to different arrays one index at a time. A psuedo-code example: array[0] = item1[0] + item2[0]; ...
4
votes
3answers
93 views

Using abstract methods to force subclasses to define values for member fields

Often in my designs I define an abstract superclass whose subclasses will vary mostly in their values for the fields defined in the superclass. For example, in a game I'm developing there's an ...
0
votes
1answer
54 views

How to support multiple firmware versions?

I'm working on an app which talks to a bluetooth low energy (BLE) device and exchanges customized data with it. Our team has defined the data models and there's a method that will parse the data ...
2
votes
1answer
212 views

How should object identification be managed?

I have a java/swing application in (hopefully good) MVC structure. Here is a overview of my model classes: One or more workers may work at one working location and one worker may work at different ...
1
vote
2answers
101 views

Passing central objects around or having global instances? [duplicate]

Having a larger WinForms application with several classes I currently pass references to several "central" objects around to function calls. This leads to more method parameters. Example: public ...
10
votes
5answers
777 views

Algorithm for percentage without knowing total number

Suppose there are n lines for a hotline. Whenever a customer calls the hotline, the call is forwarded to one of the n lines. And I want to assign percentage of calling to each of the n lines. ...
0
votes
0answers
30 views

How to test for performance or locking issues of sharing a database with another app

I have a typical Spring/Hibernate Tomcat webapp that has a user_info table. I’m trying to create another webapp that will do CRUD actions on the user_info table. I'm considering sharing the same ...
7
votes
1answer
233 views

Suggested method for extracting a standalone C library from an existing R package?

My group has been developing an R package to simulate plant growth (see GitHub repository). The R package uses .Call to interface with C. We have decided that it would be worthwhile to create a ...
1
vote
1answer
206 views

Nested objects in REST

I have simple set of resources, not more than 10 types, with some one-to-many relationships. For example An order has many entries An entry has many comments A machine can have multiple entries ...
0
votes
1answer
80 views

Implement RPC via SIP

Look at the following use case. I have a client (Java) application, which wants to get/set the state of another, remote application (C). The communication between them is done via SIP, which is run ...
1
vote
3answers
152 views

How to make a random-access archive of text files?

I wrote an application that tests the performance of evolutionary algorithms. This application performs a run of the algorithm which consists of several generations. The data which is produced by my ...
-1
votes
1answer
164 views

All programming functions always return to the If or If/Else statement? [closed]

After learning, coding, and coding even more than ever now, I have noticed a trend in a lot of programming which I do. The trend is that the majority of my functions are if{} or if{} else{} statements ...
2
votes
0answers
46 views

Broadcasting - Listening to replies

We use JS by the way, but I think it's language agnostic. I'm open to ideas. We have this "pub-sub" framework that we use at work to fix the problem of tightly-coupled code. Works fine. Modules ...
2
votes
1answer
163 views

Working with a large, messy object [duplicate]

I have been handed a very cluttered, "One Ring" object (one object to rule them all). The OR class has 40 fields. These fields map to 16 different objects (the OR has all the fields from the 16 ...
6
votes
4answers
471 views

Split up large interfaces

I'm using a large interface with about 50 methods to access a database. The interface has been written by a colleague of mine. We discussed this: Me: 50 methods is too much. It's a code smell. ...
2
votes
2answers
155 views

Is it better to draw my own graphics or import images?

I am about to start a Tetris clone using Java as my programming language. While I was designing how it'd be done, I've stumbled upon this question: What would be better, if any difference at all, ...
0
votes
0answers
116 views

Are Parameters Needed?

I am wondering if my parameters are need for the methods? Here is the psuedo-code I currently have: class Transaction is Must contain Date, Payee, Balance Can have Deposit, Withdrawal, Check ...
1
vote
2answers
155 views

what to do when UX asks for an ugly, convoluted event driven design and you don't know how to implement it in a clean manner?

I have been tasked with creating a desktop client application that fetches data from web apis and presents it to the user. During the last month or so, I've spent most of my time and energy bringing ...
1
vote
1answer
102 views

Best way to let users/visitors alter the website design

What I am trying to do is give the users/visitors the option to alter the whole website based on their taste. So they can move for example the sticky bar from top to bottom, alter background colors, ...
0
votes
0answers
47 views

How would I do a vim-style character text editor in a graphical application?

There's a cool guitar tabbing application that I've used before where you can use the keyboard to move around a character grid. You can put any digit in any character cell. Here is an image: This ...
20
votes
7answers
4k views

Is there a more intelligent way to do this besides a long chain of if statements or switch?

I'm implementing an IRC bot that receives a message and I'm checking that message to determine which functions to call. Is there a more clever way of doing this? It seems like it'd quickly get out of ...
1
vote
4answers
262 views

Combinatorial explosion of interfaces: How many is too many?

I'm a relative newcomer to OOP, and I'm having a bit of trouble creating good designs when it comes to interfaces. Consider a class A with N public methods. There are a number of other classes, B, C, ...
1
vote
3answers
226 views

After HTML and CSS [closed]

I want to create dynamic professional websites. I have finished learning HTML and CSS, but as I understand, those two technologies allow to create static websites only. I heard about PHP and ...
1
vote
1answer
124 views

Dynamic Query Generation : suggestion for better approaches [closed]

I am currently designing a functionality in my Web Application where the verified user of the application can execute queries which he wishes to from the predefined set of queries with where clause ...
2
votes
2answers
139 views

What metadada to save and whether to include it inside the binary file?

I'm wondering if there are any general guidelines or best practices regarding when to split data into a metadata format, as oppose to directly embedding it within the data. (Specific example below). ...
2
votes
1answer
232 views

How do you show the exception handler in a class diagram?

I have one exception handler class. I want to show this class in the uml -- class diagram. But, I do not know how to represent relationship between class <X> and exception handler class. How can ...
1
vote
1answer
100 views

Liskov substitution principle with abstract parent class

Does Liskov substitution principle apply to inheritance hierarchies where the parent is an abstract class the same way if the parent is a concrete class? The Wikipedia page list several conditions ...