instruction stringlengths 34 19.9k |
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Assume I have 4 points (they are 2-dimension), which are different from each other, and I want to know whether they form a square. How to do it? (let the process be as simple as possible.)
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I'm trying to use a '~classic' layered arch using .NET and Entity Framework. We are starting from a legacy database which is a little bit crappy:
Inconsistent naming
Unneeded views (view referencing other views, select * views etc...)
Aggregated columns
Potatoes and Carrots in the same table
etc...
So I ended with fu... |
I am in the planning process for a new application, the application will be written in PHP (using the Symfony 2 framework) but I'm not sure how relevant that is. The application will be browser based, although there will eventually be API access for other systems to interact with the data stored within the application... |
I believe that agile works if everything is agile.
In software development area, in my opinion, if team members' code is integrated early, code will be more in sync and this has a lot of pros:
Early integration helps team members to avoid painful merges.
Encourages better coding habits, because everyone makes sure tha... |
We have very recently started a new project (MVC 3.0) and some of our early discussion has been around how the work and development will be split amongst the team members to ensure we get the least amount of overlap of work and so help make it a bit easier for each developer to
get on and do their work. The project is... |
I have to develop a real estate marketing CRM software for my client - where the application is installed on desktop but can also be accessed from web.
2 reasons why they want the application to run from desktop :
So that it can work with/without internet connection
They don't want their complete data to be online
... |
I currently use Resharper with VS 2008 Pro. I find it almost a necessity to be as productive as I can be due to lack of some of the basic refactors/shortcuts in VS.
However I was wondering if since VS 2008 improvements have been made that make it almost as good as Resharper?
|
I wrote a function and I'd like to find out if it is an implementation of some functional programming pattern or construct. I'd like to find out the name of this pattern or construct (if it exists)?
I have a function which takes a list of functions and does this to them:
wrap(fn1, fn2, fn3, fn4)
# returns
... |
So, my father is currently in the process of "hacking" together a database using FileMaker Pro, a GUI based databasing tool for his small (4 doctor) practice. The database will be used to help ease the burden on reporting from medical machines, streamlining quite a clumsy process.
He's got no programming background, an... |
I'm finding lots of 2-3k line files, and it doesn't really feel like they should be that big.
What is a good criteria to objectively call a source code file "too big"?, is there such thing as a maximum amount of lines a source code file should have?
|
I'm coming from a python CGI background and was wanting to move into something more contemporary and think I have decided upon web.py as the framework I would like to use. In regards to templating, previously I used formatted strings and the string.Template module to effect most of my templating needs. After reading th... |
I was wondering if I can use the aac codec in my commercial app for free (through lgpl ffmpeg). It says on the wiki:
No licenses or payments are required to be able to stream or distribute content in AAC format.[36] This reason alone makes AAC a much more attractive format to distribute content than MP3, particularly ... |
I'm developing a big community/forum website and I'd like to upload my code to GitHub to have at least some sort of version control over it (because I have nothing other than a .rar file as a backup, not even SVN), to let others contribute to the project, and also perhaps using it to let my potential future employers s... |
I'm just starting out on the implementation of a large enterprise-wide system, which has complex requirements and many stakeholders.
The company has been through high-level evaluation and tender process and determined to purchase a highly configurable "off-the-shelf" product rather than building an entirely bespoke sy... |
In the paper “An Extended Comparative Study of Language Support for Generic Programming” by Garcia et al. an interesting comparison of programming languages features for generic programming is given:
with the brief explanation of terminology:
Can anyone test Scala support for generic programming inside this framework... |
From brain driven development
It turns out, that every Function you’ll ever define in Scala, will
become an instance of an Implementation which will feature a certain
Function Trait.
There is a whole bunch of that Function Traits, ranging from Function1 up to
Function22.
Since Functions are Objects in Scala and... |
I'd like to create a web wizard or a wizard on/within a website.
I know there are several java frameworks for wizards but there is none for the web in particular.
If I search for a framework, I always get wizards to create a website, applet, servlet and what not. But never how to create such a wizard itself.
So the que... |
For a non-OOP language like google Go, is it idiomatic to go about implementing new container types using datatypes like arrays or lists so as to implement convenient functionality like contains method which is absent from all in built container types?
|
Possible Duplicate:
I’ve inherited 200K lines of spaghetti code — what now?
Recently I got hired to work on existing web application because of NDA I'm not at liberty to disclose any details but this application is working online in sort of a beta testing stage before official launch. We have a few hundred users rig... |
I am a sole developer and I have a web application template that I have created in Visual Studio. I am using GIT for source control, but only on my development machine. Presently I have a master and I create branches for new features, merging them back in to the master as I complete the features.
I am at a point now wh... |
I've got an implementation of the merge sort in C++ using a custom doubly linked list. I'm coming up with a big O complexity of n^2, based on the merge_sort() > slice operation. But, from what I've read, this algorithm should be n*log(n), where the log has a base of two.
Can someone help me determine if I'm just de... |
I am trying to find max value of an array, firstly i am shorting my array min to max after that i am using array[array.length-1] Is this logic efficient in large arrays?
public static int findMax(int[] array){
Arrays.sort(array);
int max = array[array.length-1];
return max;
}//end method
|
I am working on an HTTP Server in Delphi which simply sends back a custom XML dataset. I am not following any type of standard formatting, such as SOAP. I have the system working seamlessly, except one small flaw: When I have a very large dataset to send back to the client, it might take up to 2 minutes for all the dat... |
Some might argue this question is too general, but because keeping up seems especially relevant to programming, is anyone's experience that:
do employers expect you to stay current? what is the "industry standard" of expected time a programmer should spend keeping up-to-date?
is it generally acceptable that a progra... |
I mean, say you were writing professional grade software that would involve sensitive client information. (Take this in the context of me being an amateur programmer.)
Would you use hlib and hmac? Are they good enough to secure data? Or would you write something fancier by hand?
Edit: In context of those libraries cont... |
I'm attempting to design a single sign on system for use in a distributed architecture. Specifically, I must provide a way for a client website (that is, a website on a different domain/server/network) to allow users to register accounts on my central system.
So, when the user takes an action on a client website, and t... |
I've been writing a website in PHP. As the code becomes more complex, I keep finding problems that can be solved using the factory design pattern. For example: I've a got a class Page which has subclasses HTMLPage, XMLPage, etc. Depending on some input I need to return an object of either one of these classes. I use th... |
I'm new to OOP and design pattern.
I've a simple app that handles the generation of Tables, Columns (that belong to Table), Rows (that belong to Table and have Columns) and Values (that belong to Rows). Each of these object can have a collection of Property, which is in turn defined as an enum.
They are all interfaces:... |
I'm working on an application. I'm using a mixture of TDD and DDD. I'm working hard to separate the layers of my application and that is where my question comes in.
My solution is laid out as follows
Solution
MyApp.Domain (WinRT class library)
Entity (Folder)
Interfaces(Folder)
... |
I failed an interview question in C years ago about converting hex to decimal by not exploiting the ASCII table if (inputDigitByte > 9) hex = inputDigitByte - 'a'. The rise of Unicode has made this question pretty silly, but the point was that the interviewer valued raw execution speed above readability and error hand... |
I want to have fully cacheable pages in my websites, but one cannot do that if they contain user-specific data, like the userbar or things in the UI that can change depending on the permissions the user has.
So I was thinking whether it was possible to pull everything that is user-specific via ajax, and update the UI a... |
I got into an interesting internet argument about getter and setter methods and encapsulation. Someone said that all they should do is an assignment (setters) or a variable access (getters) to keep them "pure" and ensure encapsulation.
Am I right that this would completely defeat the purpose of having getters and sett... |
I'm drawing a flow diagram which should visualize the communication between 4 services I created.
Now I've got a question I'm not quite sure about. There are two ways the services could be started. Is it allowed to have multiple starting-points in a flow chart?
And: do I have to visualize error handling, like a service... |
Where does the term "front-end" come from? Is there a particular presentation/talk/job-posting which is regarded as the first use of the term? Is someone credited with coining the term?
The Merriam-Webster entry for "front-end" claims the first known use of the term was 1973 but it doesn't seem to provide details about... |
I am currently working on a WP8 application. My current design is to have each view bind against a specific view model directly.
Looking through the samples though, it seems that another way is to have all the view models accessed through the Main View Model and then have all the views to their view models through the ... |
What are the best methods of knowledge transfer?
What kinds of documentation should be expected?
What activities should take place before and after handover, both by the external party and ourselves?
|
Let's say I have a big corpus (for example in english or an arbitrary language), and I want to perform some semantic search on it. For example I have the query:
"Be careful: [art] armada of [sg] is coming to [do sg]!"
And the corpus contains the following sentence:
"Be careful: an armada of alien ships is coming to des... |
I'm doing a code-review on someone's code for class.
The class is about 800 lines long, contains a good dozen of functions but the description is like 1 line long.
I'm wondering, generally speaking, how long should the description of a class be? (in Java)?
|
I am a team lead with 5+ developers. I have a developer (let's call him A) who is a good programmer, who writes good clean, easy to understand code. However he is somewhat difficult to manage, and sometimes I wonder whether he is really under-performing or not.
Our company requires the developers to indicate the work ... |
We're evaluating a set of requirements for a customer who wants Liferay which mainly has AAA and Web CMS requirements, and allowing user to upload their own content. Also all inetgration is via web services.
However there is no need for other features such as actual "portlets", i18n, mashups, skins, themes, tagging, so... |
I have two classes Class A and Class B
In Class A, I have three methods that perform the save, delete and select operation based upon the object I pass them. In Class B I perform the logic operations, such as modification to the property of the object before being passed to the methods of Class A.
My problem is in Cla... |
I saw lot of code (for example some Android source code) where fields name start with a m while static fields start with s
Example (taken from Android View class source):
private SparseArray<Object> mKeyedTags;
private static int sNextAccessibilityViewId;
I was wondering what m and s stand for... maybe is m mutable an... |
My company has several versions of its core software in use by our customers at any one time. My job is to write bespoke Java software for the customers based on the version of core software they happen to be running.
I've created a common Java library that performs many of the tasks I regularly require in a normal pro... |
I'm an iOS dev, working for a small agency. I'm currently on a few smaller projects where I'm the only developer. We recently acquired a Jenkins server, but each project is left to fend for themselves as for how to use it.
I'd like to use it for making and distributing builds. My ideal would be:
Every commit is built ... |
Pushing new Sparkle releases of our internal apps is a pain. I have to make the build, make the release notes file, sign the .zip with the private key, and add a new entry to the appcast file tying everything together.
I'd love it if Jenkins could help: use the commit messages for the release notes, and automatically d... |
Most websites set max-age=31536000 (1 year) on the Cache-control headers of static assets such as logo images. Examples:
YouTube
Yahoo
Twitter
BBC
But there is a notable exception: Google's logo has max-age=691200 (8 days).
I've checked the headers on the Google logo in the past, and it definitely used to be 1 year. ... |
I'm new to Java and Eclipse. One of my most recent discoveries was how Eclipse comes shipped with its own java compiler (ejc) for doing incremental builds. Eclipse seems to by default output incrementally built class files to the projRoot/bin folder.
I've noticed too that many projects come with ant files to build the ... |
So we have a team with 2 developers one manager. The dev server sits in a home office and the live server sits in a rack somewhere handled by the larger part of my company. We have freedom to do as we please but I want to incorporate Kiln DSVC and FogBugz for us with some standard procedures to make sense of our decisi... |
I have read these related questions:
I'm a Subversion geek, why should I consider or not consider Mercurial or Git or any other DVCS?
git for personal (one-man) projects. Overkill?
...and I understand why git is useful. What I don't understand is why tools like git-svn that allow git to integrate with svn are useful... |
I just developed my first non-trivial android app. It was a complete nightmare. I came up with an idea, build the app, changed my idea, and implemented a lot of input from others on new features. All in all my app took 10 times longer than I think that it should have, it is almost impossible to look the source code and... |
I work in IT at a university and I'm working with about 5 different departments to develop a new process for students to apply to a specific school within the university (not the university as a whole). We're using a web-based college application vendor and adding the applicant questions for the school itself to the ... |
This may be a very simple question. I'm curious how blocking calls are implemented. Specifically, how do they block? Is this just thread.sleep?
|
In my project, I have a collection of classes. These classes for the most part contain data which is updated infrequently or not at all - that is they don't really do much - their purpose is to be passed around consumer objects that do do things, seperating data from functionality.
I would like to continue this model, ... |
I've spent the past few years working on iOS apps, and I'm now giving some serious consideration to creating an Android port of one of my apps.
I'm sure that complaints about fragmentation are a frustrating cliche to experienced Android programmers, but as an iOS programmer, I'm quite honestly overwhelmed by the number... |
I'm curious if anyone here has any idea how the images were generated as shown in this response: Which hashing algorithm is best for uniqueness and speed?
Ian posted a very well-received response but I can't seem to understand how he went about making the images. I hate to make a new question dedicated to this, but I c... |
I'm attempting to create a dashboard so that people not intimately involved with the project can get an indication of project's health. I'm struggling with determining what to put on said dashboard. I think it needs to be brief to be useful, yet complete. The project I'm working on depends on both 3rd party contractors... |
I watched a bunch of lectures on Clojure and functional programming by Rich Hickey as well as some of the SICP lectures, and I am sold on many concepts of functional programming. I incorporated some of them into my C# code at a previous job, and luckily it was easy to write C# code in a more functional style.
At my new... |
My employer has a need for a web-based application to manage and share data within the department, with approximately 50-75 possible users. I feel I have the ability to write it for them. I would likely use Python/Django with a MySQL database, so it would be open source. However, I'm the only IT person in my departm... |
I am faced with some legacy shell scripts that run batch data processing jobs in Oracle using SQL+. For the most part, the data tier does not have to communicate back to the script with retrieved data to be passed for shell-level processing but in a few cases it does.
The problem is, SQL+ is really meant to be an en... |
There's a bunch of languages that automatically return the last value in a function (mostly functional) like Ruby, Haskell, Lisp, etc.
Does this feature (or what do you call it) affect the performance of these languages?
|
Our team is mantaining and developing a .NET web service written in C#. We have stress tested the web service's farm and we have evidence that the actual architecture doesn't scale well, as the number of requests are constantly increasing.
We analyzed Martin Fowler's conclusion in this article, and our team feels that ... |
We are a group of people who are about to start a software cooperative, which means all of us (and other future workers) will be the owners of the 'company' rather than having bosses and employees. We do this from ideological reasons but also because we believe this allows many advantages - power of democracy (see SE..... |
This is actually a solved problem, but I want to understand why my original method didn't work (hoping someone with more knowledge can explain).
(Keep in mind, I've not very experienced in 3d programming, having only played with the very basic for a little bit...nor do I have a lot of mathematical experience in this ar... |
I want to use the ICSOpenVpn project source code in my commercial application.
If we see the ICSOpenVpn project, it states that its license is New BSD but the libopenvpn.so library it uses is under GNU GPLv2 license.
As per FAQ for version 2 of GNU GPL "If a library is released under the GPL (not the LGPL), does that m... |
Is there any specific language which is designed for mechatronics programming? I know about LabView, which is a data flow language, but not sure about its main platform.
Could you recommend to me, some languages apart from c/c++? Any language which is used in the topic of mechatronics( robotics, sensor programming, etc... |
I'm thinking specifically in Rails here, but I suspect this is a wider question.
In a Rails web application I'm using data from the session in models in order that the models know who is logged in. I use this in a method which filters out some data from the database depending on a very simple permissions system.
The th... |
I've been reading articles on Functional programming everyday and been trying to apply some practices as much as possible. But I don't understand what is unique in currying or partial application.
Take this Groovy code as an example:
def mul = { a, b -> a * b }
def tripler1 = mul.curry(3)
def tripler2 = { mul(3, it) }
... |
To be as restful as possible, is a user login better designed using a GET or a POST on a REST webservice? And why?
|
I have a two classes:
------------ ---------------
X Y
------------ ---------------
relation
------------ ------------------ ---------------
A() C()
B... |
There are many academic/industrial researchs about various development methods (Scrum, XP, waterfall, ect.), telling us how to do it right and stuff. But I never saw something that suggest how to choose a method, what will be better for a given project.
I know that what the developers are used to is an very important a... |
Passwords shouldn't be stored in plain text for obvious security reasons: you have to store hashes, and you should also generate the hash carefully to avoid rainbow table attacks.
However, usually you have the requirement to store the last n passwords and to enforce minimal complexity and minimal change between the dif... |
I've spend a few hours playing around with Maven + reading some stuff on the apache official site and also a few random googled articles. By this I mean that I really tried to find the answers myself - both by reading and by doing things on my own. Also maybe worth to mention that I installed the m2e plugin so most of ... |
I've seen these 2 guidelines in coding c# standard and I’m not sure the what the 2nd one means.
With the exception of zero and one, never hard-code a numeric value; always declare a constant instead.
Use the const directive only on natural constants such as the number of days of the week.
What is the definition of a ... |
Where SQL statements are executed from a program, what is the best practice to store the statement text?
Most often it is in a read only string, in the source file it is executed in.
I think a better approach would be to have a separate text file containing all SQL statements, that are then read in to a dictionary obje... |
I've been debating asking this question for some time. Based several of the comments I read in this question I decided I had to ask.
This feels like I'm stating the obvious, but I believe that regular reading (of books, blogs, StackOverflow, whatever) and/or practice are required just to stay current (let alone excel)... |
I don't have any code for this since I don't know how I am meant to do this.
I have a car and I am able to move it around on a flat plane and I have that working correctly. However, I want it to also be able to move up hills accurately. So that when I drive up a hill the front wheels start going up first and then the b... |
I understand that the "mm" suffix [in various GTK-associated C++ binding libraries] means "minus minus," but where exactly does it come from?
I understand that there is a programming language called "C--," but if there were bindings (and I'm pretty sure I've seen some), they would be suffixed "--".
TL;DR: Is there some... |
We have a Visual SourceSafe installation that 4 developers collaborate on. Inside that there are 30 or so independent projects in different top level folders.
Is it necessary for us to create a new TFS "Project" for each of those 30 items, or can we simply place them in the same overarching project folder... possibly ... |
I'm working on a project where I need heavy numerical calculations to be real-time visualized with something flexible like D3.js. Are there frameworks out there that would let me painlessly achieve this? Or do I need to use some sort of "glue" code written in, say, Python?
|
I am importing a website into TFS that is stored in SourceSafe as
$/MyApp 1.0
$/MyApp 2.0
$/MyApp 3.0
$/MyApp 3.5
Should I import this as several distinct projects (MyApp1.0 ... ) or as one project called "MyApp"?
|
I'm reading part 17.2.1 of Java language specification: http://docs.oracle.com/javase/specs/jls/se7/html/jls-17.html#jls-17.2.1
I won't copy a text, it's too long, but I would like to know, why for third step of sequence they're saying that
If thread t was removed from m's wait set in step 2 due to an interrupt
Threa... |
In the context of C#, .NET 4/4.5 used for an application running on a web-server, what is the relationship between "Task Parallel Library" and "Task-based Asynchronous Pattern"?
I understand one is a library and the other is a pattern. But to dig deeper, is it like "The library is used by the pattern to enforce good p... |
I am developing a tool that discovers network services enabled on host and writes short summary on them like this:
init,1
└── login,1560 --
└── bash,1629
└── nc,12137 -lup 50505
{
:net => [
[0] "*:50505 IPv4 UDP "
],
:fds => [
[0] "/root (cwd)",
[1] "/",
[2] "/bi... |
I have seen a lot of advice that it is better to do Type object; than
Type* object = new Type();
in C++ whenever possible—i.e., minimize your use of new. I understand the rational behind this and appreciate it.
But according to my understanding, to practice dependency inversion requires pointers, e.g.:
Type* object = ... |
I've been thinking about solar collectors where several independent mirrors to focus the light on a solar collector, similar to the following design from Energy Innovations.
Because there will be flaws in the assembly of this solar array, I am proceeding with the following assumptions (or lack thereof):
The software ... |
I'm making an application (wxPython) to process some data from Excel documents. I want the user to be able to undo and redo actions, even gigantic actions like processing the contents of 10 000 cells simultaneously. I Googled the topic, and all the solutions I could find involves a lot of black magic or is overly compl... |
Excuse me if I'm not descriptive enough, as I do not have much of a background when it comes to these things:
How would I go about coding a primitive trading strategy and link it to some sort of artificial trading environment? Where do I start, and what are some other essential questions I should be asking?
I am intere... |
I have a rest service that is essentially a proxy to a variety of other services. So if I call
GET /users/{id}
It will get their user profile, as well as order history, and contact info, etc... all from various services, and aggregates them into one nice object. My problem is that each call to a different service has t... |
I recently came across a website that generates a random adjective, surrounded by a prefix and suffix entered by the user. For example, if the user enters "123" for prefix, and "789" for suffix, it might generate "123Productive789". I've been screwing around with it, and I thought I might try something out. I entered t... |
I have been doing some investigation regarding ASP.NET Web API. I have enjoyed using the WCF REST template to create new RESTful web services, and Web API seems to be a cleaner iteration on that.
However, I like the flexibility of WCF in allowing http, TCP, MSMQ. This aspect seems to facilitate a distributed and scalab... |
I really like google golang but could some one explain what the rationale is for the implementors having left out a basic data structure such as sets from the standard library?
|
Basically I want to develop a Address lookup(part of my project) using C# (and I can use SQL if necessary). I have a very large text file which have all the UK address and postcodes. Addresses needs to be looked up from this text file.
For example, as soon as a user type in the first letter of the postcode it should... |
What's the difference between a design pattern and a strategy?
Is the monolith actually an anti-pattern?
|
This Turing award lecture by Ken Thompson on topic "Reflections on Trusting Trust" gives good insight about how C compiler was made in C itself.
Though I understand the crux, it still hasn't sunk in. So ultimately, once the compiler is written to do lexical analysis, parse trees, syntax analysis, byte code generation e... |
According to this post :
http://channel9.msdn.com/Forums/Coffeehouse/MS-working-on-a-same-compiler-for-C-AND-C--Not-in-incubation-but-for-production-
How much truth is in this post? Should it be taken seriously by hardcore C++ programmers (game devs etc)??
Edit : There's another purpose to this question... Will C# be ... |
Based on the example of Rastrigin's function. At the plot function, if I chose 'best fitness', on the same graph 'mean fitness' will also be plotted. I understand well about 'best fitness' whereby it plots the best function value in each generation versus iteration number. It will reach value zero after some times.
I ... |
In our development environment We have more and more build scripts for ant to perform the build tasks for several different build jobs.
These build scripts sometimes become large and do a lot of things and basically is source code in and of itself.
So in a "TDD-world" we should have unit tests and coverage reports for ... |
I am looking for advice how to architect licensing for a .NET library. I am not asking for tool/service recommendations or something like that.
My library can be used in a regular desktop application, in an ASP.NET solution. And now Azure services come into play.
Currently, for desktop applications the library checks ... |
I'm new to cache and haven't used it on my projects. I would like to know about what is best practice in caching.
Should caching be done while developing or finish development then cache everything?
|
I recently found out that I can have two interfaces, one containing a method with the same signature as a method in the other interface. And I can have an interface or class that implements both of afore-mentioned interfaces. So the descendant class/interface implicitly implements two different methods as one method.
W... |
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