instruction stringlengths 34 19.9k |
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Question 11 in the Software Quality section of "IEEE Computer Society Real-World Software Engineering Problems", Naveda, Seidman, lists fp computation as undesirable because "the accuracy of the computations cannot be guaranteed".
This is in the context of computing acceleration for an emergency braking system for a hi... |
I am trying to come up with a decent Adjacency List graph implementation so I can start tooling around with all kinds of graph problems and algorithms like traveling salesman and other problems... But I can't seem to come up with a decent implementation. This is probably because I am trying to dust the cobwebs off my... |
Let's say I have a build. I need to know if a particular changelist/commit is present in that build.
How would I solve this problem?
I can think of a couple of possible approaches:
1) Add the changelist number into the binary so that I can look somewhere in the GUI and know what the changelist number is. I can then us... |
Possible Duplicate:
What “version naming convention” do you use?
Do you change your major/minor/patch version numbers right before you release or right after?
Example: You just released 1.0.0 to the world (huzzah!). But wait, don't celebrate too much. 1.1.0 is coming out in six weeks! So you fix a bug and do a new b... |
Write psuedocode to determine the number of pairs of values in an
input file that are equal. If your first try is quadratic, think again
and develop a linearithmic solution.
I found this question in a textbook and I'm not sure how to write this algorithm. My guess at first was to write it along the formula nC2 = ... |
I need a bit of advice from you developers who deal with cross-platform applications (specifically programs with a GUI).
I will be creating an application soon that needs to be cross-platform and so I have done some preliminary research on two different frameworks: JavaFX 2.0 and Qt.
Honestly, both would more than suit... |
When reading others code do you usually have any troubles understanding it,
Or its more usually that you question the others code about it being wrong/non-efficient/bad-formatted(etc)?
Someone reading what you coded on your first job
|
I think this might be a useful language feature and was wondering if any languages already support it.
The idea is if you have:
class C
virtual F
statement1
statement2
and
class D inherits C
override F
statement1
statement2
C.F()
There would be a keyword applied to C.F() such that removin... |
I'd like some input on this on those working with agile methodologies...
A current project is finding that development on our planned user stories is finishing some time before the end of the iteration, and that the testing effort and business acceptance is what's actually dragging us out longer towards the end. This m... |
I'm teaching some middle and high school students programming right now, and I found that some of them really liked online programming puzzles. So I created http://www.kapparate.com/coder/ , and right now there's 4 categories of puzzles.
All the puzzles are set up right now so that variables are pre-initialized, and th... |
I am quite familiar with and love using git, among other reasons due to its distributed nature. Now I'd like to set up some similarly distributed (FOSS) Project Management software with features similar to what Redmine offers, such as
Issue & time tracking, milestones
Gantt charts, calendar
git integration, maybe some... |
For experimental reasons, I am trying to convert user input into a fictitious language. All of the translation can be 1:1.
I would prefer if I could accomplish this with PHP.
Should I use gettext and poedit? The fictitious language is not very large, I imagine I can do most of the translation 1:1
I have scoured the goo... |
Should I be concerned with security when installing Node packages globally? Why or why not?
|
What are the advantages of using Javascript-only versus using JQuery-only?
I have limited experience with JavaScript and JQuery coding. I've added bits and snippets of each to HTML pages but I've mostly coded server-side stuff in other languages. I've noticed that while you can theoretically do the same things using ei... |
I have just started to use Pomodoro today and I am trying to work out what I should and should not do during my 25 minute work time.
For my 25 minute work stint I started to write some code and realised that I had done something similar in a related project so I opened that solution to copy and paste that existing code... |
This is purely an exercise in self improvement and education.I am trying to implement an extension for a vi-like text editor within a browser. Can anyone give any advice or pointers as to where and how I should start?
|
I'm a novice programmer and have been experimenting with Javascript, jQuery and PHP but felt I wasn't getting a real depth of understanding of what I was doing. So, after reading Joel Spolsky's response to a question on this site (which I can't find now!), I took it back to basics and read Charles Petzold's 'Code' and ... |
I'm interested in finding more books like The Pragmatic Programmer. Rather than the run of the mill, technology-specific books that are out of date by the time they go to press. Can you provide advice on finding more books along that vein?
|
Do vendors need to provide sources, at the customer's request, for GPL licensed software installed on the hardware they sell?
For example, a vendor sells an IPTV box and pre-installs some proprietary software product which is linked with some GPLed library. As a consequence, the software becomes GPLed itself.
Does the ... |
The asio::buffer function has (void*, size_t) and (PodType(&)[N]) overloads.
I didn't want to write ugly C-style (&x, sizeof(x)) code, so I wrote this:
SomePacket packet[1]; // SomePacket is POD
read(socket, asio::buffer(packet));
foo = packet->foo;
But that packet-> looks kinda weird - the packet is an array after al... |
I need to add some new features to a PHP application. It is to follow the steps of a order. A process create some orders, the order goes to confirmation, then if approved is sent to a provider, later the provider confirm that can deliver the order, a request is made to the provider and so on...
I need to register when ... |
I was reading the "C++ Coding Standards" and this line was there:
Variables introduce state, and you should have to deal with as little state as possible, with lifetimes as short as possible.
Doesn't anything that mutates eventually manipulate state? What does you should have to deal with as little state as possible ... |
With mobile technologies becoming increasingly popular what is happening on the server-side with most of these apps when they need to communicate with a back end?
I'm used to the world of technology from 10 years ago when most resources were accessed by requesting a dynamic web page that behind the seen used a server-s... |
Q1. I would like to know if it's free for a developer (I mean, if I have to pay no royalties to Sun/Oracle) to develop (Android) mobile apps in Java?
After reading this snippet about use of Java field, I'm getting the impression that Java is not free for mobile development, is that right?
.."General Purpose Desktop Co... |
I hear a lot of people speak poorly of Java, especially the ones coming from C/C++. Is there a historical reason why? Is it because it used to be machines were too slow to run the JVM without lag?
|
One of our application filters files in certain directory, extract some data from it and export a document from the extracted data. The algorithm for extracting the data depends on the file, and so far we use regex to select the algorithm to be used, for example .*\.txt will be processed by algorithm A, foo[0-5]\.xml w... |
In almost every project I work on with a team, the same problem seems to creep in. Someone writes UI code that needs data and writes a data access method:
AssetDto GetAssetById(int assetId)
A week later someone else is working on another part of the application and also needs an AssetDto but now including 'approvers' ... |
I have a MFC CMap object, each object stores 160K~ entries of long data. I need to store it on Oracle SQL. We decided to save it as a blob. Since we do not want to make additional table, we also thought about saving it as local file, with the SQL column pointing to that file. We would prefer to just keep it as blob on... |
For example, it's very straightforward to have an index.php controller be a procedural script like so:
<?php
//include classes and functions
//get some data from the database
//and/or process a form submission
//render HTML using your template system
?>
Then I can just navigate to http://example.com/index.php and ... |
Consider the following code fragment (adapted from https://stackoverflow.com/a/12265946/1333025):
// Using scalaz 6
import scalaz._, Scalaz._
object Example extends App {
case class Container(i: Int)
def compute(s: String): State[Container, Int] = state {
case Container(i) => (Container(i + 1), s.toInt + i)
... |
What is the difference between building an application Outside In vs building it Inside Out using TDD?
These are the books I read about TDD and unit testing:
Test Driven Development: By Example
Test-Driven Development: A Practical Guide: A Practical Guide
Real-World Solutions for Developing High-Quality PHP Frameworks ... |
In my program design, I often come to the point where I have to pass object instances through several classes. For example, if I have a controller that loads an audio file, and then passes it to a player, and the player passes it to the playerRunnable, which passes it again somewhere else etc. It looks kind of bad, but... |
I have a database table containing a list of systems relevant to the tool I am building, mostly in-house applications, or third-party systems we receive data from. This table is added to infrequently, approx every 2 months.
One of these systems is Windows itself, which is where we store our users' LANs, and I now need... |
Wikipedia defines programming paradigm thus:
a fundamental style of computer programming
which is echoed in the descriptive text of the paradigms tag on this site.
I find this a disappointing definition. Anyone who knows the words programming and paradigm could do about that well without knowing anything else about i... |
Let's say I have an assemblyA that has a method which creates an instance of assemblyB and calls its MethodFoo().
Now assemblyB also creates an instance of assemblyC and calls MethodFoo().
So no matter if I start with assemblyB in the code flow or with assemlyA, at the end we are calling that MethodFoo of AssemblyC().... |
A colleague and I have recently argued over whether a pure regex is capable of fully encapsulating the csv format, such that it is capable of parsing all files with any given escape char, quote char, and separator char.
The regex need not be capable of changing these chars after creation, but it must not fail on any o... |
I've got a library, which I inherited, which presents a zoomable representation of the Earth. It's a Mercator projection and is constructed from triangles, the properties of which are stored in binary files.
The surface is built up, for any given view port, by drawing these triangles in an overlapping fashion to pro... |
I notice that someone in my organization programs comparisons like:
if (100 == myVariable)
rather than:
if (myVariable == 100)
He claims the former is quicker in languages like C++. I can't find any evidence. We program in C#.
Is this true for any programming language?
|
In his blog post The Clean Architecture Uncle Bob suggests a 4-layer architecture. I understand the separation between business rules, interfaces and infrastructure, but I wonder if/when it's necessary to have separate layers for domain objects and use cases. What added value will it bring, compared to just having the ... |
I'm trying to have something like an integer array uniform for my fragment shader (I only need read access). Since it's a fairly large chunk of data (not so large that uploading it in every frame would be impossible, but enough to make me want to rather not do it). Essentially I want to just pass it a uniform telling t... |
I have an interview coming up soon for a Business Analyst position and the recruiter mentioned some feedback from a prior candidate that was interviewed who said the interviewers asked him what the difference between a Windows and Linux development environment was. Are there some high level things I need to be aware o... |
This Git branching model recommends branching for all development efforts and merging when complete:
Branch
Develop
Merge when complete
I'm wondering how this works in practice, given that performing a merge off this model will simply add a commit to the develop with whatever commit message happened to be the last on... |
I need to write a tree where each element may have any number of child elements, and because of this each branch of the tree may have any length.
The tree is only going to receive elements at first and then it is going to use exclusively for iterating though it's branches in no specific order.
The tree will have severa... |
Currently, Wikipedia Scrum Article defines "Sprint Backlog" as:
A prioritized list of tasks to be completed during the sprint.
It is my understanding that the "Product Backlog" is a prioritized list but that the "Sprint Backlog" does not have an order. I am looking for a definitive reference for the answer.
|
I'm using the Yii Framework which is an MVC php framework that is pretty similar to your standard web-based MVC framework. I want to display the related data from a many-to-many table as a list of strings in my view.
Assuming a table schema like:
tag { id, name }
post { id, title, content, date }
post_tag { post_id,... |
Ok I have a couple of questions here. First let me give you some background information. I'm starting a project where I have a node.js server running my application and my website running on another normal server. My application will allow multiple users simultaneous connections and updates to the database so Redis see... |
I'm designing a file handler interface:
public interface FileHandler
{
public void openFileHandler(String fileName);
public void closeFileHandler();
public String readLine();
public String [] parseLine(String line);
public String [] checkLine(String line[]);
public void incrementLineCount();
... |
I'm working in image processing (mainly OCR) and I wonder how I should integrate unit tests in my development.
I'm already using unit tests for more "common" type of code but when dealing with image processing code I'm not sure how to deal with it. This kind of code always need some image data input/output and mocking ... |
I have one question in my mind that in case of circular doubly linked list the head pointer of the doubly linked list also logically point to the next pointer of the tail node of the linked list and tail's next pointer also point to the previous pointer of head.
Please Answer me this question I am a bit confused.
|
I deployed a project some days ago that allow to extract some medical articles using the results of a questionnaire completed by a user. For instance, if I reply on questionnaire I'm affected by Diabetes type 2 and I'm a smoker, my algorithm extracts all articles related to diabetes bubbling up all articles contains in... |
Possible Duplicate:
Best practices for retrofitting legacy code with automated tests
I've been working on a project in Flex for three years now without unit testing. The simple reason for that is the fact that I just didn't realize the importance of unit testing when being at the beginning of studies at university. ... |
What is your approach with propagation to all classes/windows of preferences/settings of your application?
Do you share the preference_manager class to all classes/windows who need it or you make variables in each classes/windows and update them manually each time setting are changed?
Currently I have a PreferencesInt... |
I may not be able to give the right title to the question. But here it is,
We are developing financial portal for wealth management. We are expecting over 10000 clients to use the application. The portal calculates various performance analytics based on the the technical analysis of the stock market.
We developed lot o... |
I am very new in ASP.NET MVC and Web stuff. I want to know how I should separate my page logic into different controllers. Like for example should I use Home\BuyProduct or Product\Buy. When there is a sign to move logic to the new separate controller? Should it be one Controller per page? What is the basic rules?
|
A few days ago, I read an answer stating that writing queries within your c# code are long gone.
I'm not sure what the specific person meant with the comment but, it got me thinking. At the company where i work, we maintain an assembly containing all the queries to the database (let's call it Queries). This assembly i... |
I have an IT background and was pretty confident until an opportunity came up at work to go into programming(C#). I have never programmed before this, and the software I am programming for is a program I have never used before (a 3D modeling software).
It has been 6 months since then and I feel like giving up. I didn'... |
Recently, I have been tasked with more high-level planning assignments due to the lead developer of my team leaving. I hate long-term planning. My brain just doesn't naturally seem wired for it, and I am not interested enough in it to spend the time to learn it (it is hard enough to keep up with the programming side o... |
We have a prospect with FoxPro 2.6 (whatever it means) system.
Our product integrates with other systems by the means of triggers (usually). We would place couple of triggers on X system and then just pull collected data for our use. This way there is no need to customize customers product and it works great(almost rea... |
I have an app that runs a C++ server backend and Javascript on the client. I would like to define certain strings once only, for both pieces of code. For example, I might have a CSS class "row-hover" - I want to define this class name in one place only in case I change it later.
Is there an easy way to include, or re... |
I've been studying n-tier architectures as of late, particularly in VB.NET with Entity Framework and/or LINQ to SQL. I understand the basic concepts, but have been wondering about best practices in regard to triggering CRUD-type operations from user input/action. So, the arcitecture looks something like the following:
... |
I understand that it is capable of managing concurrent users on same file, but how does it do that?
I am working on a file that another user is using concurrently and he committed couple of times before me, now my files don't have the changes he made. Every time I end up in such a situation I gets a conflict and I am s... |
They both serve the same purpose: Providing a vocabulary for semantic markup. Schema is recognized and standardized… but the microformats standard is by an open community process.
Schema exploits microdata in documentation, while microformats go on classes. (Of note: microdata means that an element must be of a single ... |
As i remember the time when i was learning PHP, it was suggested to build a simple blog or a forum after reading the language fundamentals. I was told/read that this would cover everything that I would need to learn about PHP from a beginners book.
This advice was out there in a number of places, and after following a... |
Our T-SQL developer just gave his two weeks notice. We have been asked if our team of four developers would like an additional developer.
We are offered to do our own T-SQL / Entitiy Framework development or we could get another dedicated T-SQL developer.
What are the pros and cons with having a dedicated T-SQL develop... |
GOing over a lecture on DES
I got most of it except WHERE DOES DES KEY COME FROM?
Does an authority give you the key or what?
Simple language please
|
I've worked in a few shops where management has passed the idea of pair programming either to me or another manager/developer, and I can't get behind it at all. From a developer stand-point I can't find a reason why moving to this coding style would be beneficial, nor as a manager of a small team have I seen any benef... |
Possible Duplicate:
Programming languages with a Lisp-like syntax extension mechanism
I'm making a programming language, and, having spent some time in Lisp/Scheme, I feel that my language should be malleable. Should I use macros, or is there something else I might/should use? Is malleable syntax even a good idea?... |
I'm not totally clear on how using the command line differs from working through the OS' interface using an editor for example. Obviously the UI is different but I want to understand how the command line interacts with the kernel and microprocessor, and how this compares to how kernel interfaces with the OS' GUI. I kno... |
I work in a medium sized company but with a very small IT force.
Last year (2011), I wrote an application that is very popular with a large group of end-users. We hit a deadline at the end of last year and some functionality (I will call funcA from now on) was not added into the application that was wanted at the very... |
I'm imagining a situation where you are creating an F# module in a purely functional style. This means objects do not have mutable fields and are not modified in place. I'm assuming for simplicity that there is no need to use .NET objects or other kinds of objects. There are two possible ways of implementing an object... |
I have taken a programming course 2 years ago but I haven't worked in programming since then. I recently found a programmer job, but there is no programming team so for me to gain valuable experience from.
I am Programming by myself and making changes on a program already made by my Ex-colleague. I need to know what ... |
Regarding Software Engineering, there are several obstacles for Extreme Programming, one of them is reluctant ideas. Not to accepting certain kind of idea.
What is the exact meaning of the term "reluctant ideas"
|
Say, I have two classes:
Airplane and Bird, both of them fly. Both implement the interface IFly. IFly declares a function StartFlying(). Thus both Airplane and Bird have to define the function, and use it as per their requirement.
Now when I make a manual for class reference, what should I write for the function Star... |
I need to define enums in several classes. The majority of fields are the same in all of the enums. But one has one or two more fields, another has fewer fields. Now I wonder what is the best way to deal with this?
Create separate enums
public enum Foo {field1, field2, field5 };
public enum Bar {field1, field2, field3... |
Suppose I have a file foo.py containing a class Foo:
class Foo(object):
def __init__(self, data):
...
Now I want to add a function that creates a Foo object in a certain way from raw source data. Should I put it as a static method in Foo or as another separate function?
class Foo(object):
def __init__(self... |
I want to create a basic search engine, and I want you to give me some ideas how to filter out the best results for my visitors.
I have three fields regarding a product the user can search in:
Title
Category
Description
I came up with these ideas and I ask you to either competently criticize them or add to them.
If ... |
When programming in Windows, how does Windows communicate with the programs that run on it?
When you incorporate a function call which is in another memory location on the disk or memory (not a function you yourself wrote and is included in the compilation), especially the Windows API, how does the compiler know where ... |
I'm having trouble finding a feature comparison between Visual Studio 2012 Express Edition and the professional edition. I'm using the trial Professional version at the moment, but it'll run out soon, so I need to make a decision whether to purchase the full version.
Obviously, I can just try both initially and see if... |
According to W3C:
Web service is a software system designed to support interoperable machine-to-machine interaction over a network. It has an interface described in a machine-processable format
Web application conforms to this definition. Its interface is HTTP.
So can web application be called web service?
|
I am learning algorithms, and I came across something very interesting.
The asymptotic bound of the linear equation (a * n)+b is O(n^2), for all a > 0.
This is same bound as a * n^2 + b * n + c, which is surprising.
|
I'm in the midst of refactoring a project. I've recently read Clean Code, and want to heed some of the advice within, with particular interest in Single Responsibility Principle (SRP).
Currently, there's a class called OrderProcessor in the context of a manufacturing product order system.
This class is currently perfor... |
obj.id seems fairly common and also seems to fall within the range of something an object could know about itself. I find myself asking why should my object know its own id?
It doesn't seem to have a reason to have it? One of the main reason for it existing is retrieve it, and so my repositories need to know it, and th... |
Hello fellow programmers,
I am reading a book on C# and the author is comparing Abstract classes and Interfaces. He claims that if you have the following "abstract class:"
abstract class CloneableType
{
public abstract object Clone();
}
Then you cannot do this:
public class MiniVan : Car, CloneableType
{}
This, I und... |
Cocos2d-X is a game engine framework based on Cocos2d-iPhone, which consists of expanding supported platforms, with multiple choice of programming languages thats shares the same API structure.
What is be better Project Resource Organization and Structure at Cocos2d-X Development?
|
I'm rewriting a vehicle tracking application, a google maps based thing..
The users are able to search for a vehicle by typing a few characters of the vehicles "callsign".
My application is based around a sort of "event bus" within Backbone.. when a search occurs I send a message on the bus saying something like "does... |
As an Electronic Engineer, my programming experience started with Assembly and continue with PL/M, C, C++, Delphi, Java, C# among others (imperative programming is in my blood).
I'm interested in add to my previous knowledge, skills about functional programming, but all I've seen until now seems very obfuscated and e... |
I am an entrepreneur of a small software developer company. The flagship product is developed by myself and my company grew up to 14 people. One of pride is that we've never have to be invested or loaned.
The core development team is 5 people. 3 are seniors and 2 are juniors.
After the first release, we've received man... |
I wrote two programs that server and client can connect to each other (one program for server and another for client) with their IP addresses (socket programming).
Now I want to modify it so that if the client or server for example wrote something in textbox other user be notify of that.
My programs are Windows Form Ap... |
The Oracle website says this about Java SE Embedded license:
development is free, but royalties are required upon deployment on
anything other than general purpose systems
What does "general purpose system" mean here?
We have a sensor network around the country. On each box we have installed, there is a micro contr... |
Given a sequence of integers in range 1 to n. Each number can appear at most once. Let there be a symbol X in the sequence which means remove the minimum element from the list. There can be an arbitrarily number of X in the sequence.
Example: 1,3,4,X,5,2,X
The output is 1,2.
We need to find the best way to perform thi... |
I built a social Android application in which users can see other users around them by GPS location. At the beginning thing went well as I had low number of users, but now that I have increasing number of users (about 1500 +100 every day) it has revealed a major problem in my design.
In my Google App Engine servlet I ... |
What benefits are gained from using the command line for software development over using an alternative GUI? Is the command line faster for certain tasks? Are certain tools only available via the command line?
|
There is an AGPLv3 based software (Client) that makes web service calls (using SOAP) to another software (Server - commercial, cloud based). There is no common code or any connection whatsoever between these two except for the web service calls being made.
My questions -
Does the Server need to be AGPL too? I guess n... |
Let's assume a successful web Spring application running on a MySQL or PostgreSQL database. The traffic is becoming so high and the amount of data is becoming so big that a distributed database solution needs to be implemented to address scalability issue. Let's also assume this application is using Hibernate and the d... |
I want to create a project in C++ that can work in Windows, Linux and Embedded Linux.
How are projects created when they have to work across many OS'es? Is it first created on one OS and then the code slowly modified to be ported to another OS? Eg: to me, the Linux version of Firefox appears to be created as a Window... |
I have to develop 3 different sites
video.com for hosting video
audio.com for hosting audio
docs.com for hosting docs.
domain names for example only
Almost 80% of the functionality is the same for all the three, with remaining 20% being completely different features...
How do I handle this? How does sites like SO ... |
The Unicode Terms of Use state that any software that uses their data files (or a modification of them) should carry the Unicode license references. It seems to me that most Unicode libraries have functions to check whether a character is a digit, a letter, a symbol, etc., and so will contain a modification of the Unic... |
I have a client who wants a tool for him to be able to upload his products, enter orders, and keep track of customer details. There are quite a few highly customised requests, which is why he wants the tool custum made.
He does not care much about the interface design - it just has to be usable and provide access to t... |
I'm thinking of developing a proxy-like program to forward ports on a remote PC to a local PC (for example SSH).
Assume that both local and remote PCs are running behind typical firewalls (i.e. consumer broadband router firewall, Windows firewall or corporate firewalls).
The program will be a Java program which the use... |
What is better naming conventions at Xcode regardng External File
(images, sounds) etc?
Is there any guideline from vendor Apple?
As we store our projects at SVN, is there any complicity from Hosted
Server (we use Linux + Server SVN ) ?
|
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