instruction stringlengths 34 19.9k |
|---|
This might be a rather silly question as I am at my first attempts at TDD. I loved the sense of confidence it brings and generally better structure of my code but when I started to apply it on something bigger than one-class toy examples, I ran into difficulties.
Suppose, you are writing a library of sorts. You know w... |
A simple scenario:
2 projects are in version control
The application
The test(s)
A significant number of checkins are made to the application daily.
CI builds and runs all of the automation nightly.
In order to write and/or run tests you need to have built the application (to reference/load instrumented assembli... |
As a hypothetical, if I were to interview someone for a new PHP developer position when my experience is in .NET, how can I determine if the code sample they've provided me is efficient and of good quality?
In other words, what is the best way to evaluate a programmer's code if you're not familiar with the language?
|
We're using Subversion as a full CM for code and also for related project documents. We have JIRA and Fisheye. When we wanted to add a peer review tool, we looked at and tested several candidates. Our weighted requirements included both code and document review, but ultimately, the integration with JIRA slanted the sco... |
Here are some questions I've recently asked interviewees who say they know Java concurrency:
Explain the hazard of "memory visibility" - the way the JVM can reorder certain operations on variables that are unprotected by a monitor and not declared volatile, such that one thread may not see the changes made by another ... |
Let's assume I want (for fun at start) to play with some new DSL (domain specific language) idea. And I really want its user[s] (probably only me at first) to interact thru a web interface. I'll probably implement it in C++ (probably using LLVM).
Should I use an HTTP server library (like libonion or microhttpd) to talk... |
We have written an application that spawns at least 9 parallel processes. All processes generate a lot of logging information.
Currently we are using Python’s QueueHandler to consolidate all logs into one file. Unfortunately, this sometimes results in very messy files which are hard to read (making it difficult to tra... |
In my current project, I need to store a very long ASCII string to each instance of a given object. This string will receive an 2 appends per minute and will not be retrieved so frequently.
The worst case scenario is a 5-10MB string. I'll have thousands of instances of my object and I'm worried that storing all those ... |
Here's a situation that usually happens in some companies:
Announce interesting product X.
Promise a release date.
Release on the promised released date, ready or not.
Users discover and report defects.
Send patch after patch after patch after patch after patch.
My question is:
Ummm, what could be the factors that wou... |
I'm an aspiring game developer, I work on occasional indie games, and for a while I've been doing something which seemed like a bad practice at first, but I really want to get an answer from some experienced programmers here.
Let's say I have a file called enumList.h where I declare all the enums I want to use in my ga... |
Is there any possibility to add a prefix before localhost?
My question is that I want to add a prefix before localhost for my project url (ie. "dev.localhost/project/default.htm"). This is for an ASP.NET application running in IIS.
|
If you were asked to design the backward and forward button operation (as a library) in a browser, how would you do it? What will be your APIs and parameters to them? what data structure will be best suitable for this usecase?
|
I've always coded in C# MVC3 when developing web applications. But now i wanted to learn a bit more about developing web sites with just ASP.NET.
But now i'm wondering what a good setup for my code would be. For me, an MVC like pattern seems to be a good way to go. But obviously ASP.NET doesn't have any router and cont... |
First of all, I want to note I love C++ and I'm one of those people who thinks it is easier to code in C++ than Java. Except for one tiny thing: libraries.
In Java you can simply add some jar to the build path and you're done.
In C++ you usually have to set multiple paths for the header files and the library itself. In... |
There is a partial answer on Stack Overflow, but I'm asking something a teeny bit more specific than the answers there.
So... Does the formal semantics (Section 7.2) specify the meaning of such a numeric literal? Does it specify the meaning of numeric operations on the value resulting from interpreting the literal?
If ... |
This is a question about solving a particular problem I am struggling with, I am parsing a long list of text data, line by line for a business app in PHP (cron script on the CLI). The file follows the format:
HD: Some text here {text here too}
DC: A description here
DC: the description continues here
... |
I've decided to create a programming language of my own, mostly just for fun. However, I got interested in the legal aspect of it all.
You can, for example, licence specific programs under specific terms. However, how do you go about licensing a language? Also, by that I don't just mean the implementation of the langua... |
A friend of mine (let's call him Joe) is working on a promising project, and has asked me for help. As a matter of friendship I agreed (orally) not to discuss the details, but now he has a potential investor who wants me to sign a non-disclosure agreement (NDA). Since thus far all my work has been pro bono I told Joe I... |
In an ASP.NET MVC project (Razor), I have a Get request, which loads two properties on a model, dependent on the property passed into the action method. So if the parameter has a value, the Group property is supplied data. But if not, the Groups collection property is supplied data.
In the post action method, when I ... |
Having read the quick start at nspec.org, I realized that NSpec might be a useful tool in a scenario which was becoming a bit cumbersome with NUnit alone.
I'm adding an OAuth (or, DotNetOpenAuth) to a website and quickly made a mess of writing test methods such as
[Test]
public void UserIsLoggedInLocallyPriorToInvokin... |
I am maintaning a memory mapped file to store my tree like datastructure.
When I'm updating the datastructure ,I got this problem.
The file is limited on it's size and can't be too long or too small.
I have a methods like
void mapfile_insert_record(RECORD* /* record*/);
void mapfile_modify_record(RECORD* /* record*/... |
I have started to write a program in C++ 11 that would analyse chords, scales, and harmony.
The biggest problem I am having in my design phase, is that the note 'C' is a note, a type of chord (Cmaj, Cmin, C7, etc), and a type of key (the key of Cmajor, Cminor). The same issue arises with intervals (minor 3rd, major 3rd... |
And how does it (or does not) correspond to "polymorphic"? Occasionally I see this notion like in: Implement and represent polyadic operations. I checked Wiktionary but it only gives a general meaning, not specific to functional programming.
|
I asked this question at stackoverflow and received no response (closed as duplicate with no answer). I'm experimenting with OOP and I have the following basic MVC layout:
class Model {
// do database stuff
}
class View {
public function load($filename, $data = array()) {
if(!empty($data)) {
... |
I am currently learning Python (from Java) and have a question on contracts.
Example: an application defines an interface that all plugins must implement and then the main application can call it.
In Java:
public interface IPlugin {
public Image modify(Image img);
}
public class MainApp {
public main_app_lo... |
I want to make sure a piece of software I am writing is usable by people with various disabilities such as blindness and an inability to use a mouse and / or keyboard.
Unfortunately I have no experience with things such as screen readers or other methods that disabled people use to make using a computer easier / possib... |
I have an Entity Student with following properties - (name, joinedOn, birthday, age, batch, etc.) and a function fetchStudents(<params>).
I want to fetch students based on multiple filters.
In my method I have two ways to pass filters.
Pass all filters as params to the method
Make a class StudentCriteria with filters... |
I'm in transition from "writing unit tests" state to TDD.
I saw as Johannes Brodwall creates quite acceptable design from avoiding any of architecture phase before. I'll ask him soon if it was real improvisation or he had some thoughts upfront.
I also clearly understand that everyone has experience that prevents to wr... |
I noticed on the first day my iOS app hit the app store I got a download from Albania and another one from China. The app is only useful to a specific group, all of which are in a certain U.S. city. Are there bots that automatically download every new app? If so, to what end?
|
Been teaching myself how to code over the past four months or so -- mainly in JavaScript, but just started Python -- and had a revelation today. I can write in JavaScript pretty well, but I don't actually know what JavaScript is. Basically I know how to use it, but not the advantages/disadvantages, its origination, its... |
Say I have a class Person that has instance variables age, weight, and height, and another class Fruit that has instance variables sugarContent and texture. The Person class has no methods save setters and getters, while the Fruit class has both setters and getters and logic methods like calculateSweetness. Is the Frui... |
As a personal project, I'm creating a single page, asp.net web application using Nancy to provide RESTful services to the single page. Due to the complexity of the single page, particularly the JavaScripts used, I've think creating a dedicated project for the client side of web development and another for service side ... |
I'm looking for a reference to the following. I commonly hear that one-third of a projects time will be spent in design, one-third in implementation, and one-third in testing. The three phases of development seems to be derived from the waterfall model. But, where did the time division originate (1/3, 1/3, 1/3)? Is... |
I'm trying to follow LSP in practical programming. And I wonder if different constructors of subclasses violate it. It would be great to hear an explanation instead of just yes/no. Thanks much!
P.S. If the answer is no, how do I make different strategies with different input without violating LSP?
class IStrategy
{
... |
I am working on personal project that will be designed to help manage my media library, specifically recordings created by Windows Media Center.
So I am going to have the following parts to this application:
A Windows Service that monitors the recording folder. Once a new recording is completed that meets specific cr... |
From the discussion I've seen it seems that atomic operation and thread safety are the same thing, but a lot of people say that they're different. Can anyone tell me the difference if there is one?
|
Consider this scenario:
I am developing a program FooSuite that uses a GPL-licenced library QuuxTools
I release the program FooSuite 1.0 under GPL
Later on I discover that, for some reason, I need to licence the program to someone on different terms.
Hence:
I remove the dependency on GPL via QuuxTools, by either...
... |
In one of my server application I have a class that look like,
class A
{
static int _value = 0;
void DoSomething()
{
// a request start here
_value = 0;
_value++;
// a request end here
}
// This method can be called many time during request
void SomeAsyncMethods()
... |
Possible Duplicate:
what are the best tips for storing images in a database?
In those study cases of image storage,
An image that change only once in a while, if it changes at all (like an image for an article)
The image case from above is not only one image but over 10, that link to the same article
An image that... |
I'm due to meet with a developer/sales person from a new 3rd party resource we're about to start using. The main topic I'll be interested in, is their API as I will be the developer making use of it and explaining it to the rest of the team.
What questions would you recommend asking?
Things I'm already thinking about ... |
How many bits of address is required (for the program counter for example) in a byte-addressed computer with 512 Mbyte RAM?
What does the formula look like?
How is this connected with the fact that 32 bits can address no more than 4 GB RAM?
|
I have a little problem with the terms module and component.
In my mind, a module are bundled classes, which are only accesable via a well defined interface. They hide all implementation details and are reusable. Modules define modules on which they depend.
What is the difference to components? I looked it up in some b... |
I am curious about how global variables are handled by script engines. I am looking for a script engine that does not preserve the state of global variables upon invocation. Are there such engines out there? We are looking for a scripting language we can use under the script engine API for Java.
When making multiple in... |
On the Wikipedia page for Windows, it states the Windows is written in Assembly for the bootloader and task switcher, and C and C++ for kernel routines.
IIRC, you can call C++ functions from an extern "C"'d block. I can get using C for the kernel functions so pure C apps can use them (like printf and such), but if they... |
We are on the verge of a conversion. For years, our company supported only IE for its internal (intranet) home-built tools.
Since a few of our users are still on XP, which means IE only goes up to 8... a heavily JS / jQuery site wont even load!
We have been in the process of converting to use Chrome instead, to make u... |
"A" is related to "B" and "C". How do I show that "B" and "C" might, by this context, be related as well?
Example:
Here are a few headlines about a recent Broadway play:
David Mamet's Glengarry Glen Ross, Starring Al Pacino, Opens on Broadway
Al Pacino in 'Glengarry Glen Ross': What did the critics think?
Al Pacino e... |
Making new inheritance hierarchy with the help of C++ I think about:
Why there is no inheritance from the class objects? Abstract example (on abstract C++):
struct Foo { int v; Foo(int a) : v(a) {} };
struct Buz : public Foo(2) { ... }
So, the Buz is inherited only from instance of Foo - Foo(2).
Can such idea be use... |
I've recently undertaken a refactoring of a medium sized project in Java to go back and add unit tests. When I realized what a pain it was to mock singletons and statics, I finally "got" what I've been reading about them all this time. (I'm one of those people that needs to learn from experience. Oh well.)
So, now tha... |
When reading Scrum Guide, as the official text for scrum, I find out there is no specific solution to provide software testing in scrum. (the only hint is on page15)
I'm a little vague on whether scrum is considered a software development methodology or not?
If it is not, then how come some of its practices opposes Ext... |
I have a class that is a singleton and off of the singleton are properties that hold the instances of all the performance counters in my application.
public interface IPerformanceCounters
{
IPerformanceCounter AccountServiceCallRate { get; }
IPerformanceCounter AccountServiceCallDuration { get; }
... |
Is there a good design pattern for this?
I want to create a messaging class.
The class will be passed:
the type of message (eg. signup, signup confirmation, password reminder etc)
the client's id
The class needs to then look up the client's messaging preferences in the db (whether they want communication by email, sms ... |
When working with fragments, I have been using a class composed of static methods that define actions on fragments. For any given project, I might have a class called FragmentActions, which contains methods similar to the following:
public static void showDeviceFragment(FragmentManager man){
String tag = AllDevices... |
I've read several books on iOS development and Objective-C, however what a lot of them teach is how to work with interfaces and all contain the model inside the view controller, i.e. a UITableViewController based view will simply have an NSArray as it's model. I'm interested in what the best practices are for designing... |
I was looking at the sqlite table that Core Data generates and noticed that all table columns start with 'Z'. I realize this is an implementation detail, but I was curious as to why that's the case and if there was a design decision involved in this. Anyone happen to know or guess why?
Here's a sample schema output of ... |
There is this new kid on the block called Interaction Oriented Programming (IOP).
Can somebody explain how it works? How does it compare to object oriented programming? Will this replace object oriented programming or will it just be a niche thing?
What exactly is it and what is its intended purpose?
|
I want to create an app that accesses the GMail API, but I'm finding that it isn't as simple as I thought it might be.
I'm hoping somebody in the community here might have some experience working with one of these API's and could not only recommend the right solution, but also show me to some tutorials or examples that... |
The question is in the title. I want to have my thinking verified by experienced people. You can add more or disregard my opinion, but give me a reason.
Here is an example requirement: Suppose you are required to implement a fighting game. Initially, the game only includes fighters, who can attack each other. Each figh... |
I am trying to get an understanding of Inversion of Control and the dos and donts of this. Of all the articles I read, there is one by Mark Seemann (which is widely linked to in SO) which strongly asks folks not to use the service locator pattern.
Then somewhere along the way, I came across this article by Ken where he... |
I'm writing script for fb and I have 3 objects that I'll be using through all classes. I'm wondering if there is any advantage in using the static keyword except I don't have to create an instance every time I need to use a method/object? Which way should I go, with static or without it?
I know this is basic, but I'm n... |
My job is to refactor an old library for GIS vector data processing. The main class encapsulates a collection of building outlines, and offers different methods for checking data consistency. Those checking functions have an optional parameter that allows to perform some process. For instance:
std::vector<Point> checkI... |
I program simple tasks everyday, but I have a hard time finding the scripts, and code snippets I write. Is there an manageable way to keep track of this sort of thing?
|
I am planning to integrate real time notifications into a web application that I am currently working on. I have decided to go with XMPP for this and selected openfire server which I thought to be suitable for my needs.
The front end uses the strophe library to fetch the notifications using BOSH from my openfire server... |
RFC:
Request for Comments (RFC) is a memorandum published by the Internet
Engineering Task Force (IETF) describing methods, behaviors, research,
or innovations applicable to the working of the Internet and
Internet-connected systems.
At the end of this Intro to REST video, RFC2616 and RFC3986 are mention... |
Say I've got a cache memory where instruction and data have different cache memories ("Harvard architecture"). Which cache, instruction or data, is used most often? I mean "most often" as in time, not amount of data since data memory might be used "more" in terms of amount of data while instruction cache might be used ... |
I want to create a data structure to work with isomorphic tree. I don't search for a "algorithms" or methods to check if two or more trees are isomorphic each other. Just to create various trees with the same structure.
Example:
2 - - - - - - - 'a' - - - - - - - 3.5
/ \ / \ / \
3 3 ... |
I am trying to model in UML 2.0 a Java servlet application that has three classes
Servlet class; essentially a main class that acts as the controller
DatabaseLogic; contains methods for database operations
XMLBuilder; builds an XML from a query result string
The classes use a variety of packages from the Java library... |
I notice two types of design used in web applications, some with a particular subdomain for users contents, and some with same URL structure for all the accounts.
Ex: unique.domain.com and another_unique.domain.com for subdomains for sites like blogspot, wordpress, basecamp etc.
while in the other approach domain.com/a... |
I got several explanations but so far I'm not able to understand that what are the abstract classes and methods in Java.
Some said it has to do something with the security of the program, other said it isn't anything like that.
Even from the Dietel & Dietel's book I don't get it's purpose.
When, where and why do we use... |
Suppose there is a library xxx under GNU GPL, that provides a function yyy. Suppose my code links to the library and uses this function. Does my code inherit GPL license?
IANAL, but my thoughts are conflicting:
On one hand, my code is derivative from the library, so it should inherit GPL.
On other hand, my code just u... |
I'm working on a project to schedule a machine shop, basically I've got everything covered BUT date calculations, I've got a method called schedule (working on PHP here):
public function schedule($start_date, $duration_in_minutes)
Now my problem is, currently I'm calculating end time manually because time calculations... |
I was reading up on Algorithms and came across the Karatsuba multiplication algorithm and a little wiki-ing led to the Schonhage-Strassen and Furer algorithms for multiplication.
I was wondering what algorithms are used on the * operator in C#? While multiplying a pair of integers or doubles, does it use a combination... |
I'm in the process of writing a library in PHP, based on a Java package that comes with a BSD license.
The code will obviously not be the same as the original, but most class/method names, and the in-line documentation, will be the same.
Is a link the original Java library in the code documentation enough?
Can I then r... |
LGPL requires that it if a program uses LGPL-ed library, users must be able to re-link the program with a different version of the library:
...
d) Do one of the following:
0) Convey the Minimal Corresponding Source under the terms of this License, and the Corresponding Application Code in a form suitable for, and unde... |
Python's lack of pointers makes data-structure construction intuitively more challenging, and has so much built in functionality that, as an amateur, I can't see when, why, or how you would create something beyond what's already there.
When have you built your own, and why did you do it? E.g. special types of trees, et... |
I've been taking a look at Clojure lately and I stumbled upon this post on Stackoverflow that indicates some projects following best practices, and overall good Clojure code. I wanted to get my head around the language after reading some basic tutorials so I took a look at some "real-world" projects.
After looking at C... |
I recently stumbled across a company that has created what appears to be a computer vision technology that is capable of detecting shoplifting automatically and alert its users.
LINK
Watching some of the videos and examples provided by the company has left me completely baffled and amazed as to how on earth they may ha... |
I need to write a script (based on basic functions) to process /image/audio/video files. The process is mainly filesystem tasks and converts. The database of files has been stored by mysql. The script is simple but cause heavy tasks on the system; for example renaming/converting/copying thousands of file in a run. The ... |
This question is regarding a homework project in my first Java programming class (online program).
The assignment is to create a "stringed instrument" class using (among other things) an array of String names representing instrument string names ("A", "E", etc). The idea for the 12-string is beyond the scope of the as... |
Architecturally speaking, which is the preferable approach (and why)?
$validation_date = $users_repository->getUser($user_id)->validation_date;
Seems to violate Law of Demeter by accessing member of object returned by method call
Seems to violate Encapsulation by accessing object member directly
$validation_date = $... |
I am in the process of designing a search engine for an asp.net site. The site currently uses Microsoft Indexing Server to index and search content which range from simple text files to MS documents to PDFs. MIS is also used to crawl File servers. MIS in tandem with Index Server Companion crawls for content from extern... |
Here is a little problem
Have an entity, with a value object. Not a problem. I replace a value object for a new one, then nhibernate inserts the new value and orphan the old one, then deletes it. Ok, that's a problem.
Insured is my entity in my domain.
He has a collection of Addresses (value objects). One of the addres... |
I have a friend who has the specific problem of building a case against the use of a custom HTML <wrapper> tag in some site's markup. Now, intuitively we can answer that use of such a tag is risky, as future HTML specs may define a wrapper tag with semantics that conflict with its use on the site. We can also appeal to... |
Based on what information, can we identify something as a software development framework? For example the Wikipedia article of 'software framework' claims it should include support programs, compilers, code libraries, etc. But there are some companies I know of which call a code library 'framework'!
What should a cert... |
I have not see these links explicitly stated in the Agile literature I have read. So, I was wondering if this approach was correct: Let a story be defined as "In order to [RESULT], [ROLE] needs to [ACTION]" then
RESULT generates system tests.
ROLE generates acceptance tests.
ACTION generates component and unit tests.... |
Background
I have a web application that I host on my own server. I have clients who use the application as is, but some have asked if they can host the application on their own server. This enables them to have their own URLS rather than mine. The application only forms part of their website so I'm assuming it will n... |
I am using MVC3 and Enitty Framework 4 with the Database first approach. It created the context template with its own validation for the fields based on the database. My question is where should I put the other validation based on the buisness logic. Should I put it in the Context.tt file, should it go in the controlle... |
I am currently writing code and want to make sure all the params that get passed to a function/method are valid. Since I am writing in PHP I don't have access to all the facilities of other languages like C, C++ or Java to check for parameters values and types
public function inscriptionExists($sectionId, $userId) // P... |
What to do when a sprint is finished early?
At the moment our Scrum team works off stories from the backlog, if the sprint is finished early.
What happens with stories taken from the backlog? Will the stories be added to the current Sprint ? If yes, what if these stories won't be finished in time. Is the Sprint failed ... |
I recently posted a question regarding recovering a DDD architecture that became an anemic domain model into a multitier architecture and this question is a follow-on of sorts.
My question is when do domain concepts become application constructs.
My application is a local client C# 4/WPF with the following architectur... |
Let's say I have a web service that is poorly written and inefficient, but it's output is cached so there's no bottleneck. Do you just leave it? Would you go as far as to take deliberate shortcuts knowing that performance problems will be masked?
|
Typically we follow an Agile development process that tends not to put an emphasis on writing requirements and technical documents that nobody will read. We tend to focus our limited manpower to development and testing activities with collaborative design and whiteboarding as a key focus.
There is a mostly standalone ... |
A lot of JavaScript libraries (notably jQuery) use chaining, which allows the reduction of this:
var foo = $(".foo");
foo.stop();
foo.show();
foo.animate({ top: 0 });
to this:
$(".foo").stop().show().animate({ top: 0 });
With proper formatting, I think this is quite a nice syntactic capability. However, I often see a... |
These days computers usually have 2GB or 4GB memory.
I like to use some secure client server model, and well an sql database is likely candidate.
On the other hand I only have about 8000 records, who will not frequently be read or written in total they would consume less then 16 Megabyte.
And it made me wonder what wou... |
Our company ported moderate chunks of business logic to JavaScript. We compile the code with a minifier, which further improves performance. Since the language is dynamically typed, it lends itself well to obfuscation, which occurs as a byproduct of minification. We went to great efforts to ensure it positively screams... |
Our team supports BackOffice application: a mix of WinForm and WPF windows. (about 80 including dialogs). Really a kind of a Swiss Army Knife. It is used by developers, tech writers, security developers, testers.
The requirements for new features come quite often and sometimes we play Wizard of Oz to decide which GUI o... |
I'm an interface designer and now I'm working with a team of programmers to develop a new CMS for a heavy media site.
As I've started developing a specification list for a prototype it turned out a very big one. I do realize now that the client-side will be JS heavy, with lots of DnD and other "cool designer stuff". Th... |
We have a website and two mobile apps that connect through an API. All the platforms do the exactly same things. Right now the structure is the following:
Website. It manages models, controllers, views for the website. It also executes all background tasks. So if a user create a place, everything is executed in this c... |
I have been having some fun lately exploring the development of language parsers in the context of how they fit into the Chomsky Hierarchy.
What is a good real-world (ie not theoretical) example of a context-sensitive grammar?
|
I wrote an open source library that parses structured data but intentionally left out carriage-return detection because I don't see the point. It adds additional complexity and overhead for little/no benefit.
To my surprise, a user submitted a bug where the parser wasn't working and I discovered the cause of the issue ... |
I work on a few high traffic websites that all share the same database and that are all heavily database driven. Our SQL server is max-ed out and, although we have already implemented many changes that have helped but the server is still working too hard.
We employ some caching in our website but the type of queries we... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.