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0
votes
2answers
132 views

Efficient Repeating Alarm Clock in Low Level Language like C

I was thinking about it and I was curious as to how one would code an efficient repeating alarm clock in C? Would you set an alarm time and then offset the time with the ms time equivalent of a day ...
0
votes
0answers
9 views

Conceptualizing a Projector App with Mobile Remote

Before we begin, this isn't a question of "how to..?" (We already have a working implementation for this project) but more of a "what is the best way to?". Our project has very specific rules: ...
0
votes
1answer
98 views

When to use “is a” or “has a”? [closed]

In my node.js application, I have a queue class which has push and pop methods and a data property. I have an Event class which handles an event and pushes it on to the queue. If I think object ...
-1
votes
0answers
83 views

Programmatically fix broken Java source code [migrated]

I'm currently creating a grading utility for my university that compiles, lints, run professor-defined tests, etc. In the process, I'm generating a parse tree of the student's source code so I can do ...
-4
votes
2answers
63 views

Rationale for modern languages implement changeable global variables [closed]

Common sense seems to be that usage of global variables is bad, in particular if they are used as real variables (i.e. changing state; e.g. Why is Global State so Evil?). How does it come then, that ...
3
votes
1answer
86 views

“Untriggered events” in Reactive Programming

The premise is that you have a Stream - a source of events spread over time. You can connect to Stream and create a logical chain that will fire when a new event is emitted: var button = ...
3
votes
3answers
118 views

Streams: what has happened after instantiation but before reading?

I'm trying to grok streams - my world is C# but I suspect the principles are general. I understand the general principle of reading/writing bytes from/to a store. However, what I don't understand, ...
0
votes
0answers
28 views

AngularJS modal windows chain suggestion

AngularJS 1.4.x. After time I've spend creatin' my confirmation modal alon' of bunch of another modals, I've faced an issue with spaghetti code in my controllers. Problem: imagine i have methods ...
1
vote
4answers
363 views

OOP Principles in Customer and Account classes of a Bank

I am designing a Bank Application which deals with Customers having FD Accounts. There are two approaches to this : Approach 1 In this the customer has a list of accounts. The bank application ...
4
votes
1answer
163 views

What would happen if two different commits in one git repo had the same hash?

I know this has been said to be pretty much statistically impossible but that's a different question. What would be the consequences if against all odds, this did occur?
1
vote
0answers
72 views

Simulating fluid transfer in a pipe [closed]

I know this is a fairly large/broad category, but I've been racking my brain over the last few weeks on how to simulate fluid flowing through pipes. In the environment I'm working, I can have a single ...
2
votes
2answers
199 views

Reading using non-blocking IO on a fd asynchronously in C++ (moving from Node.js)

I'm trying to switch my brain from Node.js/Objective-C iOS programming to C++ programming, and it's a little bit taxing. Node.js and Objective-C with iOS do not have a run loop that I am supposed to ...
6
votes
2answers
2k views

Is “Unit testing” a form of formal method?

After some research, I understand that: Formal method contribute to the reliability and robustness of a design. (ref : Wikipedia - Formal method) Unit testing ensures us of the absence of errors ...
0
votes
0answers
253 views

Writing Z80 table based assembler/disassembler

I have a long-term project: DIY computer with various processors. One of my wishes not only make hardware, but software too. So I started from assembler/disassembler for Linux, though there is a lot ...
2
votes
2answers
174 views

Are single method interface and function type definition the same?

In a language where it is possible to define interfaces and typedefs (using Dart here): abstract class Receiver { void receive(int quantity); } typedef void Receive(int quantity); abstract class ...
1
vote
1answer
99 views

GUI concept for a reactive, asynchronous graphical editor

I think I could describe this problem in an abstract way, but I suppose it will be easier to understand when I describe it in a real world environment. The Problem Imagine a graphical editor where ...
1
vote
2answers
103 views

When, if ever, are basic concurrency optimizations generally made?

Lets say I need to preform the following computationally intensive task For i in range(100000000): doComplexCalculationWithNoSideEffects(i) Most people I talk to tell me that basically any ...
3
votes
1answer
313 views

Structure of stack of a function call

I've been reading Aleph One's paper on Smashing the Stack for Fun and Profit. I wrote down example1.c from his paper, modified it a bit to see what the stack looks like on my system. I'm running ...
5
votes
4answers
335 views

Dependency Inversion & Decoupling

I'm wondering if someone might explain the last paragraph written in this example on Dependency Inversion & Decoupling. http://www.springbyexample.org/examples/core-concepts.html Following the ...
3
votes
1answer
206 views

Why does Git's stash commit need two parents?

Why does Git's stash commit need two parents? In the Hacker's Guide to Git, I see this mental model for stashes: The guide tells me that stash@{0} needs both A and B as parents. Why? Why doesn't ...
1
vote
1answer
57 views

Locking on data vs locking on functions

In concurrent code, what is the difference between, and the pros and cons of each: Locking on data Locking on functions My understanding is that locking on data is better, and I think I'm doing ...
2
votes
3answers
2k views

What is a Database Environment?

I am going through Relational Database Design by JLM. I have come across words like database, data model, DBMS etc. which I am able to understand. But, I get confused when the author tries to use ...
1
vote
1answer
70 views

Exception class for each exception or for all framework

I am developing a framework and it can generate various types of exceptions. Initially I'm working with a single exception class that indicates that something went wrong inside the framework. However, ...
1
vote
0answers
60 views

Access public property of object on view

When we are working with some MVC FW on PHP, generally we have a view loading function like load(string viewName, optional array viewVariables). My doubt here is: if we are working with some object, ...
1
vote
4answers
222 views

What would you call the concept of CofeeScript or Sass to be? [duplicate]

There is this rising trend with web development of making new pseudo languages to extend the functionality of JavaScript, CSS and HTML given that those are static and their metamorphosis or evolution ...
1
vote
1answer
600 views

When does a Monad become a hammer?

I realize my precursory understanding on Monads is severely lacking in detail considering my knowledge comes mostly from Douglas Crockford's Monads and Gonads talk and complicated with my sevear ...
4
votes
3answers
316 views

MVC and the business rule

I need to know where in the MVC should I apply the business rule. Imagine the situation: I have a school and I need to generate a calendar of classes for teachers. Each teacher has a school subject ...
3
votes
1answer
232 views

How to store the file names, start offset and length while avoiding the issue of self imposed limits (lookup table) or having to scan the entire file?

I am attempting to learn more about C and it's descendants(C++ mainly). I have decided that I would like to create a "file system" of sorts. Not a particularly advanced one mind you but something to ...
2
votes
3answers
334 views

Should POCO domain classes contain collections?

The question title is not good, but I couldn't think of a way to word it better. I am used to develop using POCO classes in my projects, that is, domain objects contain absolutely no logic, only ...
1
vote
4answers
644 views

Alternatives to null values and option-like types

Related to this question i want to know if there is a concise way to eleminate null values out of code in general or if there is not. E.g. imagine a class that represents a user with birthday as ...
-2
votes
1answer
174 views

Explanation of the code snippet , keyword operator in , in c++ , use of objects in classes [closed]

class Vector { public: Vector(int s) :elem{new double[s]}, sz{s} { } double& operator[](int i) { return elem[i]; } //function 2 int size() { return sz; ...
2
votes
1answer
212 views

Slugify via helper or store slug on database?

I have a simple question: Slugify via helper or store the slug on database? I mean, let's suppose that I have Guilherme Oderdenge on database and I want to transform it into a human-readable URL such ...
2
votes
4answers
439 views

How to explain the difference between a variable and a key in a key-value pair?

Variables and the keys in key-value pairs are both identifiers for values, so, on a conceptual level, these seem very similar ideas. How would you explain the difference between these two concepts? ...
0
votes
2answers
64 views

How to approach design to minimize conflicts when distributing individual locations to merchants

One of my potential customers is operating an open market in their town. From what I'm told, they make a decent profit by renting out the individual locations on that market to small merchants who ...
1
vote
3answers
182 views

How to conceptually consider and implement user interface rules for numerous controls and data inputs?

I have a user interface with numerous controls and data inputs on it. Buttons, text fields, and checkboxes, etc. Imagine the following "rules" exist for a sample UI with 2 of those controls: B2 ...
1
vote
2answers
333 views

Modeling an extensible Domain Driven Design project

Say that we are developing an application with modules (Sales, Accounting, Purchasing, etc). An example case here is : Sales module is the basic / primary module available, and Accounting module is ...
2
votes
4answers
505 views

Why do we use to talk about addresses and memory of variable in C?

Why do we use to talk about addresses and memory of variable in C, where in other languages (like in Java, .Net etc) we do not talk about variable address and memory in a program, we will directly use ...
3
votes
3answers
377 views

In Objective C, what English words can I conceptually associate to the symbols?

I'm learning Objective C (from a C# background) and am having difficulty understanding the unusual method signatures and am looking for a shortcut to make the learning curve less steep. When reading ...
5
votes
1answer
439 views

How to display in compositional relationship that the item knows about the container?

I'm drawing a class diagram and noticed that sometimes I got a relationship (composition or aggregation) where the item uses the container, and sometimes not. What is the visual difference in a ...
14
votes
1answer
4k views

Erlang and Go concurrent programming, objective differences between CSP and Actors?

I was looking into concurrent programming in Erlang and Go programming languages. As per my finding they are used Actor model and CSP respectively. But still I am confused with what are the objective ...
9
votes
1answer
668 views

Is there an explicit word for non-abstract class?

I got mainly abstract classes in my project and there are a few other class which are using/inheriting them. When I'm writing the documentation I would like to specify that a part of it is just about ...
4
votes
2answers
1k views

Difference between trigger, handler and callback

It's current to see the terms callback, trigger and handler in some API documentations. It is just synonymous or each term correspond to a specific concept? I used to think that this terms are just ...
8
votes
3answers
1k views

What is “short-circuiting” in C like languages?

I have heard of the term "short-circuiting" being used in C, C++, C#, Java, and many others. What does this mean and in what scenario would it be used?
3
votes
3answers
168 views

Representational Equality versus Value Equality

I am coding a system where I have objects which represent a set of resources. These resources are identifiable (they have an ID). There can only be one resource with the same ID, and so multiple ...
3
votes
1answer
305 views

What is meant by binary compatibility? What is its importance during serialization/deserialization in a language like Java that deals in byte code?

In computing what is meant by binary compatibility? I read about it in context of serialization/deserialization that this process of serialize/deserialize should be binary compatible. What does it ...
3
votes
1answer
695 views

How do people develop emulators?

I hope this is right area on Stack Exchange to ask this question. People out there have built emulators for every game console but I don't understand how they do it. I consider myself (and have the ...
12
votes
5answers
684 views

Storing in-text metadata in a discrete data structure

I am developing an application which will need to store inline, intext metadata. What I mean by that is the following: let's say we have a long text, and we want to store some metadata connected with ...
13
votes
6answers
5k views

What *are* the programming concepts I should master to have a deep understanding of my craft (programming)? [closed]

In order of importance, if its possible to do so and it may not be, what are the most important foundations of knowing how to program. Algorithms, iteration, recursion, etc? Note that where I put ...
5
votes
3answers
7k views

How do we differentiate between a computer and a calculator?

In this SO Question there is a comment by starblue that A computer without loops is a calculator Is this true? Is that the only difference? Is there a set of criteria to differentiate or has ...
8
votes
3answers
392 views

Is there such a concept as “pseudo implementation” in software development?

I'm looking for a label to describe the practice of using human-based computation methods or other means of "faking" an algorithm for the sake of getting a product or demo off the ground quickly ...