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  • On the frontier between work and home

    - by MPelletier
    I think we've all been there: You hear of someone say "hey, wouldn't it be nice if platform X had feature Y?" You look around (on SO!), the feature really doesn't exist, even though it probably would be useful in many contexts. So it's pretty generic. Your mind wanders for a bit. "How tough would it be? Well, it'd probably be just a snippet. And an ad-hoc function. And maybe a wrapper." And boom, before you know it, you've spent a dozen hours of your free time implementing a FooFeature that's really neat and generic. The kind of code you might not even have the time to spit and shine at work, that would be a bit rushed and not so documented. So now you wonder "wouldn't this be useful to others?" And you've got your blog, maybe a CodeProject account, and your colleague who asked if FooFeature exists might, haphazardly, come accross that blog entry, had it existed before they told you. On the otherhand, the NDA agreement. It's sort of vague and general. It doesn't forbid you from coding at home, but it's clear on sharing company code, that's a big NO. But this isn't company code. Or is it? Or will it be? So, what do you do with code (that's more than just a snippet) you wrote in your off time with universality in mind but an idea that came from work, and that will most likely be used at work? Can it be published?

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  • Are short identifiers bad?

    - by Daniel C. Sobral
    Are short identifiers bad? How does identifier length correlate with code comprehension? What other factors (besides code comprehension) might be of consideration when it comes to naming identifiers? Just to try to keep the quality of the answers up, please note that there is some research on the subject already! Edit Curious that everyone either doesn't think length is relevant or tend to prefer larger identifiers, when both links I provided indicate large identifiers are harmful!

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  • What is the correct term for - server/client database sync via API?

    - by Daniel
    Forgive the vague question title. I've been programming mobile apps for 3 years now, and I've got a little too far from the web services and server side code then I probably should have. Anyway, I'm doing a personal project now and I want to create an web API for it. One of my requirements is to check for updates from my app, so I would send a timestamp to the API. I've used many APIs that my clients prepared for me and only now am I appreciating their work ! What is the term or technique used to create an API backed by a database which tracks changes via dates/timestamps, basically an effective way for me to query changes occurring since a timestamp. Simply put, I want that my app can call my API in order to sync new data and changed data from the server, to the app. The app would only have a timestamp of the last time it synced with the server. Would I have a log table for each data table in my database which adds a record for each change? Then I could query all changes with a timestamp superior to the one passed to the API. Can anyone point me in the right direction on this?

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  • How to represent a tree structure in NoSQL

    - by Vlad Nicula
    I'm new to NoSQL and have been playing around with a personal project on the MEAN stack (Mongo ExpressJs AngularJs NodeJs). I'm building a document editor of sorts that manages nodes of data. Each document is actually a tree. I have a CRUD api for documents, to create new trees and a CRUD api for nodes in a given document. Right now the documents are represented as a collection that holds everything, including nodes. The children parent relationship is done by ids. So the nodes are an map by id, and each node has references to what nodes are their children. I chose this "flat" approach because it is easier to get a node by id from a document. Being used to having a relation table between nodes and documents, a relation table between nodes and children nodes I find it a bit weird that I have to save the entire "nodes" map each time I update a node. Is there a better way to represent such a data type in NoSQL?

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  • What is a good site to use for scheduling 20+ developers and 10 projects? (resource planning) [closed]

    - by b-ryce
    I have around 20 developers and 10 or so active projects. Then I get asked if my team can take on more work, and who is going to free up when. Currently we are using a spreadsheet to keep track :( I've been digging around for a few hours and haven't found anything that meets my requirements, which are: Web based Schedule a developer's time over a period of days/weeks/months Be able to see at a glance which developer has extra capacity Quickly see when the group could take on another large project I don't mind paying for the software (It does NOT need to be free) Two projects which look close are http://www.ganttic.com/tour and http://resourceguruapp.com/ What else are people using? Anyone have the perfect solution

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  • Good ruby book with exercises? [closed]

    - by watabou
    I find that I learn the best with a book that has a number of exercises at the end of each chapters. A great example of this is C++ Primer Plus by Stephen Prata or Scientific Programming with Python or the Horstmann Java books. All of those books have a number of programming exercises at the end tailored to that specific chapter. I love the styles of those book and was wondering if there is anything similar for Ruby. I've extensively searched google for this and people have been suggesting different stuff like different websites like Ruby Koans and LRTHW but honestly, I've tried those and they aren't for me. I taught myself Python with the the Hard Way book and to be honest, it's not for me. Now, forgive me if I'm blunt but does anyone have a Ruby programming BOOK (i.e. not a website), that has EXERCISES in it? I do NOT want a website, unless the book is only or is freely available online by the author, similar to the Hard Way books. I would say that I'm a intermediate level programmer with only some Ruby experience but if you know of a beginner book on Ruby, that is fine too. Thanks in advance, I would really really appreciate the help.

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  • Can I use silverlight for building SocialNetworking applicaiton?

    - by dimmV
    Hi all, I am wondering: how feasible it would be to start developing a social networking website entirely based on silverlight; This has been fairly discussed over the years in favor of HTML. Has something changed with silverlight improvements over the years? What about: * Performance -- active users -- technology used, MVVM + MEF (possibility of lags, server memory overflow...) * Security --- WCF Ria Services & EF What are your thoughts on this subject?

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  • What is a best practice tier structure of a Java EE 6/7 application?

    - by James Drinkard
    I was attempting to find a best practice for modeling the tiers in a Java EE application yesterday and couldn't come up with anything current. In the past, say java 1.4, it was four tiers: Presentation Tier Web Tier Business Logic Tier DAL (Data Access Layer ) which I always considered a tier and not a layer. After working with Web Services and SOA I thought to add in a services tier, but that may fall under 3. the business logic tier. I did searches for quite a while and reading articles. It seems like Domain Driven Design is becoming more popular, but I couldn't find a diagram on it's tier structure. Anyone have ideas or diagrams on what the proper tier structure is for newer Java EE applications or is it really the same, but more items are ranked under the four I've mentioned?

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  • mp3 file streaming/download - apache server memory issue

    - by Manolis
    I have a website, in which users can upload mp3 files (uploadify), stream them using an html5 player (jplayer) and download them using a php script (www.zubrag.com/scripts/). When a user uploads a song, the path to the audio file is saved in the database and i'm using that data in order to play and show a download link for the song. The problem that i'm experiencing is that, according to my host, this method is using a lot of memory on the server, which is dedicated. Link to script: http://pastebin.com/Vus8SRa7 How should I handle the script properly? And what would be the best way to track down the problem? Any ideas on cleaning up the code? Any help much appreciated.

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  • Remote Data connection in iphone app

    - by Tariq- iPHONE Programmer
    Hello, i am working with Social Networking iphone app which require remote data connection. So i hired a php developer in order to provide me RESTful services. But when i start working with him, he arguing me that he will not make stored procedures and web services. Instead of he suggested me to pass query as a parameter. Suppose If I have to call Search service, he told me to send POST request with 3 parameters: Query="select * from users", username=abd and password = 123 And i thing there is no such architecture in order to use remote data. Then he is saying it is possible through socket programming. And I am 100% sure this is not an appropriate way to access remote data. This is simply illogical. Thousands of iphone application using REST/SOAP services to make remote data connection He just declined me to provide RESTful services. Please its my heartily advice to all developers that post your own views over here. So that I can show to that developers that these are the views from all developers worldwide.

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  • Should I create my own Assert class based on these reasons?

    - by Mike
    The main reason I don't like Debug.Assert is the fact that these assertions are disabled in Release. I know that there's a performance reason for that, but at least in my situation I believe the gains would outweigh the cost. (By the way, I'm guessing this is the situation in most cases). And yes, I know that you can use Trace.Assert instead. But even though that would work, I find the name Trace distracting, since I don't see this as tracing. The other reason to create my own class is laziness I guess, since I could write methods for the most usual cases like Assert.IsNotNull, Assert.Equals and so forth. The second part of my question has to do with using Environment.FailFast in this class. Would that be a good idea? I do like the ideas put forth in this document. That's pretty much where I got the idea from. One last point. Does creating a design like this imply having an untestable code path, as described in this answer by Eric Lippert on a different (but related) question?

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  • Five new junior developers and lots of complex tasks. What's now?

    - by mxe
    Our company has hired five new junior developers to help me to developer our product. Unfortunately the new features and incoming bug fixes usually require deeper knowledge than a recently graduated developer usually has (threading/concurrency, debugging performance bottlenecks in a complex system, etc.) Delegating (and planning) tasks which they (probably) can solve, answering their questions, mentoring/managing them, reviewing their code use up all of my time and I often feel that I could solve the issues less time than the whole delegating process takes (counting only my time). In addition I don't have time to solve the tasks which require deeper system knowledge/more advanced skills and it does not seem that it will change in the near future. So, what's now? What should I do to use their and my time effectively?

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  • What is the justification for Python's power operator associating to the right?

    - by Pieter Müller
    I am writing code to parse mathematical expression strings, and noticed that the order in which chained power operators are evaluated in Python differs from the order in Excel. From http://docs.python.org/reference/expressions.html: "Thus, in an unparenthesized sequence of power and unary operators, the operators are evaluated from right to left (this does not constrain the evaluation order for the operands): -1*2 results in -1."* This means that, in Python: 2**2**3 is evaluated as 2**(2**3) = 2**8 = 256 In Excel, it works the other way around: 2^2^3 is evaluated as (2^2)^3 = 4^3 = 64 I now have to choose an implementation for my own parser. The Excel order is easier to implement, as it mirrors the evaluation order of multiplication. I asked some people around the office what their gut feel was for the evaluation of 2^2^3 and got mixed responses. Does anybody know of any good reasons or conciderations in favour of the Python implementation? And if you don't have an answer, please comment with the result you get from gut feel - 64 or 256?

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  • Best Software Development Methodology Environment for Fresh Graduates

    - by newbie
    I am looking online for IT-related jobs and most of the time, they are indicating the need that the candidate must have an experience in certain software development methodology (SCRUM, RAD, Waterfall, Agile, etc). Truly, different companies have different needs. What do you think is the best environment / software development methodology for a fresh graduate to be part of so that they could really be a good programmer? What will be avoided?

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  • Web Developer interview questions

    - by Baba
    I read an article today that listed some basic questions about web development: Describe how POST data was submitted to a server by a browser. Explain a number of HTTP status codes (except maybe 404 and 500). Explain SOLID or name a design pattern. Explain ways to improve a page load speed or user experience. The author says "if you can’t answer the questions above there are a lot of people who wouldn’t think of you as a Senior Web Developer." My questions are: How relevant are these questions in respect to real life web programming and scalability? How true is that statement? In other words, do you consider this knowledge a requirement to be considered a Senior Web Developer? I was able to answer all the questions, too easily it seemed, so I'm wondering whether it is effective to use these or similar questions to screen developers rather than asking them to write sample code.

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  • Should I comment Tables or Columns in my database?

    - by jako
    I like to comment my code with various information, and I think most people nowadays do so while writing some code. But when it comes to database tables or columns, I have never seen anyone setting some comments, and, to be honest, I don't even think of looking for comments there. So I am wondering if some people are commenting their DB strcuture here, and if I should bother commenting, for instance when I create a new column to an existing table?

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  • Reverse horizontal and vertical for a HTML table

    - by porton
    There is a two-dimensional array describing a HTML table. Each element of the array consists of: the cell content rowspan colspan Every row of this two dimensional array corresponds to <td> cells of a <tr> of the table which my software should generate. I need to "reverse" the array (interchange vertical and horizontal direction). Insofar I considered algorithm based on this idea: make a rectangular matrix of the size of the table and store in every element of this matrix the corresponding index of the element of the above mentioned array. (Note that two elements of the matrix may be identical due rowspan/colspan.) Then I could use this matrix to calculate rowspan/colspan for the inverted table. But this idea seems bad for me. Any other algorithms? Note that I program in PHP.

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  • Should a domain expert make class diagrams?

    - by Matthieu
    The domain expert in our team uses UML class diagrams to model the domain model. As a result, the class diagrams are more of technical models rather than domain models (it serves of some sort of technical specifications for developpers because they don't have to do any conception, they just have to implement the model). In the end, the domain expert ends up doing the job of the architect/technical expert right? Is it normal for a domain expert (not a developer or technical profile) to do class diagrams? If not, what kind of modeling should he be using?

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  • Is it more difficult to upgrade your certification from SQL Server 2008 to 2012 than to get it from scratch?

    - by Diego
    I was wondering about the new MCSA certification on SQL 2012 and how it seems to be more difficult to upgrade your certification from 2008 to 2012 than to get the 2012 from scratch. Reason I think that is true is because anyone with any MCTS SQL Server 2008 certification can upgrade it to a MCSA 2012 by passing 2 tests (457 and 458). If you try to get it from scratch, you need to pass 3 tests (461, 462 and 463 - which are pretty much the same as 432, 433 and 448 for SQL 2008). But the thing is, even though its one test less to upgrade, all the skills necessary to pass 461, 462 and 463 are squeezed on 457 and 458 so, it seems easier to get from scratch than upgrade. Any thoughts?

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  • Proper attribution of derived work in a GPL project

    - by Anton Gogolev
    This is a continuation of me rewriting GPL project. What will be the correct way of attributing my project as being a derivative of some other GPL-licensed project? So far I came up with: HgSharp Original Copyright Matt Mackall <[email protected]> and contributors. The following code is a derivative work of the code from the Mercurial project, which is licensed GPLv2. This code therefore is also licensed under the terms of the GNU Public License, verison 2. For information on the license of this code when distributed with and used in conjunction with the other modules in the HgSharp project, please see the root-level COPYING file. Copyright 2011-2012 Anton Gogolev <[email protected]>

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  • Data structure for pattern matching.

    - by alvonellos
    Let's say you have an input file with many entries like these: date, ticker, open, high, low, close, <and some other values> And you want to execute a pattern matching routine on the entries(rows) in that file, using a candlestick pattern, for example. (See, Doji) And that pattern can appear on any uniform time interval (let t = 1s, 5s, 10s, 1d, 7d, 2w, 2y, and so on...). Say a pattern matching routine can take an arbitrary number of rows to perform an analysis and contain an arbitrary number of subpatterns. In other words, some patterns may require 4 entries to operate on. Say also that the routine (may) later have to find and classify extrema (local and global maxima and minima as well as inflection points) for the ticker over a closed interval, for example, you could say that a cubic function (x^3) has the extrema on the interval [-1, 1]. (See link) What would be the most natural choice in terms of a data structure? What about an interface that conforms a Ticker object containing one row of data to a collection of Ticker so that an arbitrary pattern can be applied to the data. What's the first thing that comes to mind? I chose a doubly-linked circular linked list that has the following methods: push_front() push_back() pop_front() pop_back() [] //overloaded, can be used with negative parameters But that data structure seems very clumsy, since so much pushing and popping is going on, I have to make a deep copy of the data structure before running an analysis on it. So, I don't know if I made my question very clear -- but the main points are: What kind of data structures should be considered when analyzing sequential data points to conform to a pattern that does NOT require random access? What kind of data structures should be considered when classifying extrema of a set of data points?

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  • When there's no TCO, when to worry about blowing the stack?

    - by Cedric Martin
    Every single time there's a discussion about a new programming language targetting the JVM, there are inevitably people saying things like: "The JVM doesn't support tail-call optimization, so I predict lots of exploding stacks" There are thousands of variations on that theme. Now I know that some language, like Clojure for example, have a special recur construct that you can use. What I don't understand is: how serious is the lack of tail-call optimization? When should I worry about it? My main source of confusion probably comes from the fact that Java is one of the most succesful languages ever and quite a few of the JVM languages seems to be doing fairly well. How is that possible if the lack of TCO is really of any concern?

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  • Good Practices for development team in large projects

    - by Moshe Magnes
    Since I started learning C a few years ago, I have never been a part of a team that worked on a project. Im very interested to know what are the best practices for writing large projects in C. One of the things i want to know, is when (not how) do I split my project into different source files. My previous experience is with writing a header-source duo (the functions defined in the header are written in the source). I want to know what are the best practices for splitting a project, and some pointers on important things when writing a project as part of a team.

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  • What is the current "standard" for setting up a development environment that supports remote collaboration as well as secure version control?

    - by Andrew
    What is the current "standard" for setting up a development environment that supports remote collaboration as well as secure version control? Considering a virtual dedicated solution with vm for a web layer and a data layer, using VPN for each programmer. We're a small start-up that do both Microsoft and open-source development. Is there a set software tools or packages that are appropriate for a small shop and yet scalable? Thanks.

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  • Ruby or Python?

    - by Bobby Tables
    Hi all, This question is extremely subjective and open-ended. It might even sound like something I should just research for myself and make my own decision. But I'd like to put it out there and get some thoughts from others. Long story short - I burned out with the rat race and am on a self-funded sabbatical this year. Much of it is to take a break from the corporate grind and travel around, but I also want to play around with new technologies and do some self-learning projects, to stay up to speed on programming, and well - I just love tinkering with programming, when there's no pressure! Here's the thing: I am a lifetime C/C++/Java programmer. I'm a bit of a squiggly bracket snob since I've been working with this family of languages for my entire programming career. So I'd like to learn a language which isn't so closely syntactically related to this group. What I'm basically looking for is a language which is relatively general purpose, fun to learn, has some new concepts that are different from C++/Java, and has a good community. A secondary consideration is that it has good web development frameworks. A tertiary consideration is that it's not totally academic (read: there are real world jobs out there using it). I've narrowed it down to Ruby or Python. My impression of Ruby is that it is extremely web oriented - that the only real application of it is as a server side scripting language for doing web stuff (mainly Ruby on Rails). For Python I'm not so sure. TL;DR and to put it as succinctly as possible: which of these would be better for a C++/Java guy to learn to get some new perspectives on programming? And which is more open and general purpose and applicable to a wider set of applications? I'm leaning towards Ruby at the moment, but I worry to an extent that it looks like it's used as nothing but a server side web language.

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