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  • Is there something special about the number 65535?

    - by Nick Rosencrantz
    2¹6-1 & 25 = 25 (or? obviously ?) A developer asked me today what is bitwise 65535 & 32 i.e. 2¹6-1 & 25 = ? I thought at first spontaneously 32 but it seemed to easy whereupon I thought for several minutes and then answered 32. 32 seems to have been the correct answer but how? 65535=2¹6-1=1111111111111111 (but it doesn't seem right since this binary number all ones should be -1(?)), 32 = 100000 but I could not convert that in my head whereupon I anyway answered 32 since I had to answer something. Is the answer 32 in fact trivial? Is in the same way 2¹6-1 & 25-1 =31? Why did the developer ask me about exactly 65535? Binary what I was asked to evaluate was 1111111111111111 & 100000 but I don't understand why 1111111111111111 is not -1. Shouldn't it be -1? Is 65535 a number that gives overflow and how do I know that?

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  • Bare minimum on the Joel Test

    - by Fung
    From the Joel Test, of the 12, which do you think are the absolute must-haves to at least have a decently running software department/company? I realise there is no absolutely right answer. I'm just trying to get opinions of others out there. My own organization only manages a measly 5 of 12. If you check listings on Careers 2.0, most companies don't score a full 12 either but I'm sure they're doing fine. Does SO publish the stats for those anywhere? Or has anyone tried scrapping the results? Would be interesting to know which are practised the most. And whether because they are easier to implement or whether they actually have the most impact. Thanks.

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  • How can I transition from being a "9-5er" to being self-employed?

    - by Stephen Furlani
    Hey, I posted this question last fall about moonlighting, and I feel like I've got a strong case to make to start transitioning from being a Full-Time Employee to being self-employed. So much so, that I find it hard to concentrate at work on the things I'm supposed to be doing. However, self-employment comes with things like no health benefits or guaranteed income... so I don't feel like I can just quit. (At least not in this economy with a house and family). I'm already working 40hrs/wk on my main job, going to school to get my MS, and trying to freelance on weekends and evenings, but I want to give it more time. If I can't take LWOP or just work less than 40hrs/wk I feel like I have to give up self-employment because I just can't give my day job all my best. Would it be reasonable to ask my employer if they can cut my hours (and pay)? Is there something else I can/should do? Has anyone done this transition and had it turn out well? or bad? I am in the USA and I understand answers are not legal advice. Thanks!

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  • Is there any evidence that one of the current alternate JVM languages might catch on?

    - by FarmBoy
    There's been a lot of enthusiasm about JRuby, Jython, Groovy, and now Scala and Clojure as the language to be the successor to Java on the JVM. But currently only Groovy and Scala are in the TIOBE top 100, and none are in the top 50. Is there any reason to think that any of this bunch will ever gain significant adoption? My question is not primarily about TIOBE, but about any evidence that you might see that could indicate that one of these languages could get significant backing that goes beyond the enthusiasts.

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  • What's wrong with relative imports in Python?

    - by Oddthinking
    I recently upgraded versions of pylint, a popular Python style-checker. It has gone ballistic throughout my code, pointing out places where I import modules in the same package, without specifying the full package path. The new error message is W0403. W0403: Relative import %r, should be %r Used when an import relative to the package directory is detected. Example For example, if my packages are structured like this: /cake /__init__.py /icing.py /sponge.py /drink and in the sponge package I write: import icing instead of import cake.icing I will get this error. While I understand that not all Pylint messages are of equal importance, and I am not afraid to dismiss them, I don't understand why such a practice is considered a poor idea. I was hoping someone could explain the pitfalls, so I could improve my coding style rather than (as I currently plan to do) turning off this apparently spurious warning.

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  • What are some examples of open source software that has turned into closed source software? [on hold]

    - by Verrier
    As the title says... can anyone think of any software that has made the transition from open source to closed source / proprietary? These could include software owned by the same company who decided to take a once open source offering and turn it into closed source... but I'm really looking for some examples of companies who developed a commercial closed source product off of an existing open source one (obviously with a permissive license).

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  • What are the disadvantages of automated testing?

    - by jkohlhepp
    There are a number of questions on this site that give plenty of information about the benefits that can be gained from automated testing. But I didn't see anything that represented the other side of the coin: what are the disadvantages? Everything in life is a tradeoff and there are no silver bullets, so surely there must be some valid reasons not to do automated testing. What are they? Here's a few that I've come up with: Requires more initial developer time for a given feature Requires a higher skill level of team members Increase tooling needs (test runners, frameworks, etc.) Complex analysis required when a failed test in encountered - is this test obsolete due to my change or is it telling me I made a mistake? Edit I should say that I am a huge proponent of automated testing, and I'm not looking to be convinced to do it. I'm looking to understand what the disadvantages are so when I go to my company to make a case for it I don't look like I'm throwing around the next imaginary silver bullet. Also, I'm explicity not looking for someone to dispute my examples above. I am taking as true that there must be some disadvantages (everything has trade-offs) and I want to understand what those are.

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  • What are the legal risks if any of using a GPL or AGPL Web Application Framework/CMS?

    - by Seth Spearman
    Tried to ask this on SO but was referred here... Am I correct in saying that using a GPL'ed web application framework such as Composite C1 would NOT obligate a company to share the source code we write against said framework? That is the purpose of the AGPL, am I correct? Does this also apply to Javascript frameworks like KendoUI? The GPL would require any changes that we make to the framework be made available to others if we were to offer it for download. In other words, merely loading a web sites content into my browser is not "conveying" or "distributing" that software. I have been arguing that we should avoid GPL web frameworks and now after researching I am pretty sure I am wrong but wanted to get other opinions? Seth

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  • What is the definition of "Big Data"?

    - by Ben
    Is there one? All the definitions I can find describe the size, complexity / variety or velocity of the data. Wikipedia's definition is the only one I've found with an actual number Big data sizes are a constantly moving target, as of 2012 ranging from a few dozen terabytes to many petabytes of data in a single data set. However, this seemingly contradicts the MIKE2.0 definition, referenced in the next paragraph, which indicates that "big" data can be small and that 100,000 sensors on an aircraft creating only 3GB of data could be considered big. IBM despite saying that: Big data is more simply than a matter of size. have emphasised size in their definition. O'Reilly has stressed "volume, velocity and variety" as well. Though explained well, and in more depth, the definition seems to be a re-hash of the others - or vice-versa of course. I think that a Computer Weekly article title sums up a number of articles fairly well "What is big data and how can it be used to gain competitive advantage". But ZDNet wins with the following from 2012: “Big Data” is a catch phrase that has been bubbling up from the high performance computing niche of the IT market... If one sits through the presentations from ten suppliers of technology, fifteen or so different definitions are likely to come forward. Each definition, of course, tends to support the need for that supplier’s products and services. Imagine that. Basically "big data" is "big" in some way shape or form. What is "big"? Is it quantifiable at the current time? If "big" is unquantifiable is there a definition that does not rely solely on generalities?

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  • Opinion on LastPass's security for the Average Joe [closed]

    - by Rook
    This is borderline on objective/subjective, but I'm posting it here since I'm more interested in objective facts, without going into too much technical details, than I am in user reviews of LastPass. I've always used offline ways for (password / sensitive data) storage, but lately I keep hearing good things about LastPass. Indeed, it is more practical having it always accessible from every computer you're using without syncing and related problems, but the security aspect still troubles me. How (in a nutshell for dummies) does LastPass keep your data secure / can their employees see your data, and what is your opinion for such storage of more than usual keeping of sensitive data (bank PIN codes, some financial / business related stuff and so on - you know, the things that would practically hurt if lost / phished)? What are your opinions of it, and do you trust it for such? Any bad experiences? If someone for example is sniffing your wifi network, would such data be easier than usual to sniff out?

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  • Applicability of the Joel Test to web development companies

    - by dreftymac
    QUESTION: How can you re-write the questions of the Joel test to apply to web developers? 1. Do you use source control? (source control for all aspects of your app, including configuration, database and user-based settings?) 2. Can you make a build in one step? (can you deploy a site from staging to prod in 1 step?) ... 10. Do you have testers? (how do you test AJAX and CSS?) BACKGROUND: This is for people who work in a shop that does some web development but also uses some off-the-shelf tools like Drupal and Wordpress, but doing custom development on top of that. RELATED LINKS: http://www.joelonsoftware.com/articles/fog0000000043.html What do you think about the Joel Test?

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  • Visio Architecture Diagram [closed]

    - by Mike
    I am using Visio to create an architecture diagram similar to the following Windows block diagram: Are there components available in Visio to make a diagram like this? I can do it manually by using the open/closed bar shape from Blocks and then adding the text as textboxes but it means I have to worry about sizing/offsetting text for each black box. Is anyone aware of whether there is some built-in shape already for this?

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  • Role of "Refactoring" in good programming pratices?

    - by Niranjan Kala
    I have learned in Agile Development that: Refactoring is the process of clarifying and simplifying the design of existing code, without changing its behavior. I have heard about some GUI refactoring tools like resharper and DevExpress Refactor Pro! Here is my Questions: Question 1: how does it takes place in the Software development process and How far it effects the system? Question 2: Is Refactoring using these tools really fast the process of development/ maintenance?

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  • Development processes, the use of version control, and unit-testing

    - by ct01
    Preface I've worked at quite a few "flat" organizations in my time. Most of the version control policy/process has been "only commit after it's been tested". We were constantly committing at each place to "trunk" (cvs/svn). The same was true with unit-testing - it's always been a "we need to do this" mentality but it never really materializes in a substantive form b/c there is no institutional knowledge base to do it - no mentorship. Version Control The emphasis for version control management at one place was a very strict protocol for commit messages (format & content). The other places let employees just do "whatever". The branching, tagging, committing, rolling back, and merging aspect of things was always ill defined and almost never used. This sort of seems to leave the version control system in the position of being a fancy file-storage mechanism with a meta-data component that never really gets accessed/utilized. (The same was true for unit testing and committing code to the source tree) Unit tests It seems there's a prevailing "we must/should do this" mentality in most places I've worked. As a policy or standard operating procedure it never gets implemented because there seems to be a very ill-defined understanding about what that means, what is going to be tested, and how to do it. Summary It seems most places I've been to think version control and unit testing is "important" b/c the trendy trade journals say it is but, if there's very little mentorship to use these tools or any real business policies, then the full power of version control/unit testing is never really expressed. So grunts, like myself, never really have a complete understanding of the point beyond that "it's a good thing" and "we should do it". Question I was wondering if there are blogs, books, white-papers, or online journals about what one could call the business process or "standard operating procedures" or uses cases for version control and unit testing? I want to know more than the trade journals tell me and get serious about doing these things. PS: @Henrik Hansen had a great comment about the lack of definition for the question. I'm not interested in a specific unit-testing/versioning product or methodology (like, XP) - my interest is more about work-flow at the individual team/developer level than evangelism. This is more-or-less a by product of the management situation I've operated under more than a lack of reading software engineering books or magazines about development processes. A lot of what I've seen/read is more marketing oriented material than any specifically enumerated description of "well, this is how our shop operates".

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  • design pattern advice: graph -> computation

    - by csetzkorn
    I have a domain model, persisted in a database, which represents a graph. A graph consists of nodes (e.g. NodeTypeA, NodeTypeB) which are connected via branches. The two generic elements (nodes and branches will have properties). A graph will be sent to a computation engine. To perform computations the engine has to be initialised like so (simplified pseudo code): Engine Engine = new Engine() ; Object ID1 = Engine.AddNodeTypeA(TypeA.Property1, TypeA.Property2, …, TypeA.Propertyn); Object ID2 = Engine.AddNodeTypeB(TypeB.Property1, TypeB.Property2, …, TypeB.Propertyn); Engine.AddBranch(ID1,ID2); Finally the computation is performed like this: Engine.DoSomeComputation(); I am just wondering, if there are any relevant design patterns out there, which help to achieve the above using good design principles. I hope this makes sense. Any feedback would be very much appreciated.

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  • Which software development methodologies can be seen as foundations

    - by Bas
    I'm writing a small research paper which involves software development methodologiess. I was looking into all the available methodology's and I was wondering, from all methodologies, are there any that have provided the foundations for the others? For an example, looking at the following methodologies: Agile, Prototyping, Cleanroom, Iterative, RAD, RUP, Spiral, Waterfall, XP, Lean, Scrum, V-Model, TDD. Can we say that: Prototyping, Iterative, Spiral and Waterfall are the "foundation" for the others? Or is there no such thing as "foundations" and does each methodology has it's own unique history? I would ofcourse like to describe all the methodology's in my research paper, but I simply don't have the time to do so and that is why I would like to know which methodologies can be seen as representatives.

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  • As a code monkey, how to discuss programming with a guy who almost has a doctorate in computer science

    - by Peter Turner
    A friend of my wife's is coming over for dinner tonight and he is a lot smarter than me. What do we have in common, well... A Bachelor's in Computer Science, and that should be enough of a conversation starter. But he's nearly completed his doctoral studies and is light years ahead of me in his particular area, which I find fascinating but don't have any legit reason to care about (except for maybe a better way through heavy traffic - he's a combinatorics guy specializing in that I think) and I got married and had some kids and am a professional programmer for medical records software. We've got a lot in common, but there's a point where neither of us care or understand each other - although I really want to learn from him and I'm not certain he'd even want to talk about his work. So for all you doctors or code monkeys, what's a good conversation starter!

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  • Expected sprint completion rate and load in scrum?

    - by bjarkef
    Recently at work there have been increased focus on completion rate and load on the developers in our sprints. With completion rate I mean, if we plan 20 user stories for a sprint, what percentage of these user stories are closed at the end of the sprint. And with load I mean, if we have a sprint with 3 developers of 60 hours each, i.e. 180 hours for the sprint, how many hours worth of user stories do we schedule for the sprint. So I am really interested in others experience with this, I guess this is something everybody working with scrum deals with. My question is, what completion rate and load are expected/usual, and how are your team doing with respect to these parameters?

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  • How to capitalize maximally on location-independence … my personal #1-incentive for working as a developer

    - by SomeGuy
    To me the ultimate beauty in working as a developer is the fact that given a nice CV, your are going to find a new job, everywhere at any time. So I would like to ask if somebody here as experience in working while travelling for example. Or job-hopping from metropolis to metropolis every, say, six months. For example I have been investigating for how to get to Brazil. But it seems like that working as an employee in Brazil would be no option, b/c it takes a lot of time/money/effort to get the proper visas and permissions. So the only practical solution would be to freelance and the just travel, while getting your job done wherever you are. I bet my ass that there are loads of IT-guys out there and on here who know exactly what I am talking about. I'm looking forward to interesting ideas and stories.

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  • Pure Front end JavaScript with Web API versus MVC views with ajax

    - by eyeballpaul
    This was more a discussion for what peoples thoughts are these days on how to split a web application. I am used to creating an MVC application with all its views and controllers. I would normally create a full view and pass this back to the browser on a full page request, unless there were specific areas that I did not want to populate straight away and would then use DOM page load events to call the server to load other areas using AJAX. Also, when it came to partial page refreshing, I would call an MVC action method which would return the HTML fragment which I could then use to populate parts of the page. This would be for areas that I did not want to slow down initial page load, or areas that fitted better with AJAX calls. One example would be for table paging. If you want to move on to the next page, I would prefer it if an AJAX call got that info rather than using a full page refresh. But the AJAX call would still return an HTML fragment. My question is. Are my thoughts on this archaic because I come from a .net background rather than a pure front end background? An intelligent front end developer that I work with, prefers to do more or less nothing in the MVC views, and would rather do everything on the front end. Right down to web API calls populating the page. So that rather than calling an MVC action method, which returns HTML, he would prefer to return a standard object and use javascript to create all the elements of the page. The front end developer way means that any benefits that I normally get with MVC model validation, including client side validation, would be gone. It also means that any benefits that I get with creating the views, with strongly typed html templates etc would be gone. I believe this would mean I would need to write the same validation for front end and back end validation. The javascript would also need to have lots of methods for creating all the different parts of the DOM. For example, when adding a new row to a table, I would normally use the MVC partial view for creating the row, and then return this as part of the AJAX call, which then gets injected into the table. By using a pure front end way, the javascript would would take in an object (for, say, a product) for the row from the api call, and then create a row from that object. Creating each individual part of the table row. The website in question will have lots of different areas, from administration, forms, product searching etc. A website that I don't think requires to be architected in a single page application way. What are everyone's thoughts on this? I am interested to hear from front end devs and back end devs.

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  • when to use a scaled/enterprise agile software development framework and when to let agile processes 'emerge'?

    - by SHC
    There are quite a few enterprise agile software development frameworks available: Scott Ambler: Disciplined Agile Delivery Dean Leffingwell: Scaled Agile Framework Alan Shalloway: Enterprise Agile Book Craig Larman: Scaling Lean and Agile Barry Boehm: Balancing Agility and Discipline Brian Wernham: Agile Project Management in Government - DSDM I've also spoken with people that state that your enterprise agile processes should just 'emerge' and that you shouldn't need or use a framework because they constrain you. Question 1: When should one choose an enterprise agile software development framework, and when should one just let their agile processes 'emerge'. Question 2: If choosing an enterprise agile software development framework, how does one select the appropriate framework to use for their organisation? Please provide evidence of your experience or research when answering questions rather than just presenting opinions.

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  • Implementing custom "Remember Me" with Stripe

    - by Matt
    Implementing remember me with Stripe, while not using their Checkout (not supported on PhoneGap), seems to be fine using the path: First time: Request token on the client side using card info. Create customer on server side using token. Upon confirm, charge customer. Second time: Check if current user is Stripe customer by requesting the info from our server. If is Stripe customer, show "use credit card on file" instead of regular CC form. Upon confirm, charge customer. However, there is one important convenience items missing--last four digits of card number. Most sites inform you of the card you're using before making the payment, pretty important in case you have to switch out cards. I have seen that you can retrieve charges which would allow me to get the last four digits. Is it bad practice to pull that and display it? Are there alternative solutions anyone has in mind?

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  • What are the legal risks if any of using a GPL'ed Web Application Framework/CMS?

    - by Seth Spearman
    Tried to ask this on SO but was referred here... Am I correct in saying that using a GPL'ed web application framework such as Composite C1 would NOT obligate a company to share the source code we write against said framework? That is the purpose of the AGPL, am I correct? Does this also apply to Javascript frameworks like KendoUI? The GPL would require any changes that we make to the framework be made available to others if we were to offer it for download. In other words, merely loading a web sites content into my browser is not "conveying" or "distributing" that software. I have been arguing that we should avoid GPL web frameworks and now after researching I am pretty sure I am wrong but wanted to get other opinions? Seth

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  • What are the options for simple Ajax calls for a Java webapp?

    - by Cedric Martin
    I've got a very simple need and I don't know what are the options available. If I simplify, users see webpage like this server by a Java webapp server: [-] red [x] green [-] blue [-] yellow The selected color is green And then I want the user to be able to select the yellow color and have the part of the page containing the relevant text change to: [-] red [-] green [-] blue [x] yellow The selected color is yellow Basically I want something a bit more user friendly than simply using HTTP GET all the time. There shall be a lot of options the user can select from and this shall affect an (HTML formatted) text displayed on the page. And I want the user to see his change as soon as possible, without having the page to fully reload and without being redirected to another page. There shall be a client/server round-trip (the information to display depending on the options selected ain't available on the client-side so I cannot do it all in JavaScript in the browser). I'd like to use Ajax requests but I don't know which way to go: jQuery GWT something else What are my options and what would be the pros and cons of the various approach? P.S: I'm very familiar with Java (SCP since the last century and basically being a Java programmer for the last 12 years or so) but not familiar at all with JavaScript (though I did hack a few Ajaxy-calls years ago, way before great libraries existed).

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  • License Requirements for Including Dual-Licensed Open-Source Software

    - by Rick Roth
    How do you opt into one software license and not the other when the distributor gives the consumer more than one choice? For example I would like to use the DataTables JavaScript library in my web application. According to their web site, "DataTables is dual licensed under the GPL v2 license or a BSD (3-point) license." Furthermore, the source code of the JavaScript library has this text that calls out both licenses: /** * @summary DataTables * @description Paginate, search and sort HTML tables * @version 1.9.4 * @file jquery.dataTables.js * @author Allan Jardine (www.sprymedia.co.uk) * @contact www.sprymedia.co.uk/contact * * @copyright Copyright 2008-2012 Allan Jardine, all rights reserved. * * This source file is free software, under either the GPL v2 license or a * BSD style license, available at: * http://datatables.net/license_gpl2 * http://datatables.net/license_bsd * * This source file is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY * or FITNESS FOR A PARTICULAR PURPOSE. See the license files for details. * * For details please refer to: http://www.datatables.net */ Finally, the web pages with the licensing text (e.g. the DataTables BSD license page) has this statement: "DataTables is made available under both the GPL v2 license and a BSD (3-point) style license. You can select which one you wish to use the DataTables code under." My specific question is "how do you select which one you want to use." In my case, I want to only use the BSD license and I want to make it explicitly clear that I do not opt into the GPL v2 license in any way. How do you do that and have it hold up to legal challenge?

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