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  • Pass FORTRAN variable to Python [migrated]

    - by Matthew Bilskie
    I have a FORTRAN program that is called from a Python script (as an ArcGIS tool). I need to pass an array, Raster_Z(i,j), from FORTRAN to python. I have read about the Python subprocess module; however, I have not had much luck in understanding how to do this with FORTRAN. All examples I have found involve simple unix command line calls and not actual programs. Has anyone had any experience in passing a variable from FORTRAN to Python via a memory PIPE? Thank you for your time.

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  • Bump version before kicking off new development or when tagging a release, which is better?

    - by linquize
    Some projects bump version before kicking off a new development, while the other projects bump version when tagging a release. Which approach is better? If version number not changed at the start of new phase, the developers may forget to change it and simply release the program. If version number changed before tagging release, then 2 the version numbers (tag and Makefile/AssemblyInfo.cs) do not match. git describe may give you v1.2.3.4-15-g1234567 if current revision is after v1.2.3.4, but you have already changed the files to have v1.2.3.5

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  • Gradual approaches to dependency injection

    - by JW01
    I'm working on making my classes unit-testable, using dependency injection. But some of these classes have a lot of clients, and I'm not ready to refactor all of them to start passing in the dependencies yet. So I'm trying to do it gradually; keeping the default dependencies for now, but allowing them to be overridden for testing. One approach I'm conisdering is just moving all the "new" calls into their own methods, e.g.: public MyObject createMyObject(args) { return new MyObject(args); } Then in my unit tests, I can just subclass this class, and override the create functions, so they create fake objects instead. Is this a good approach? Are there any disadvantages? More generally, is it okay to have hard-coded dependencies, as long as you can replace them for testing? I know the preferred approach is to explicitly require them in the constructor, and I'd like to get there eventually. But I'm wondering if this is a good first step.

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  • Various roles in an Organization and their respective tasks.

    - by balu
    In various organizations(Software Company) there would be various designations having different roles. I would like to know the Industry accepted & followed trend in the organization hierarchy(..Like DBA,System Architect,Project Manager,Senior Developer,Developer,QA,Design Team,Delivery Manager etc..).And the various roles played by each of them in the various stages of the Software Development Life Cycle.Who all could possibly be sharing the responsibility mutually?

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  • Understand how the TLB (Translation Lookaside buffer) works and interacts with pagetable and addresses

    - by Darxval
    So I am trying to understand this TLB (Translation Lookaside Buffer). But I am having a hard time grasping it. in context of having two streams of addresses, tlb and pagetable. I don't understand the association of the TLB to the streamed addresses/tags and page tables. a. 4669, 2227, 13916, 34587, 48870, 12608, 49225 b. 12948, 49419, 46814, 13975, 40004, 12707 TLB Valid Tag Physical Page Number 1 11 12 1 7 4 1 3 6 0 4 9 Page Table Valid Physical Page or in Disk 1 5 0 Disk 0 Disk 1 6 1 9 1 11 0 Disk 1 4 0 Disk 0 Disk 1 3 1 12 How does the TLB work with the pagetable and addresses? The homework question given is: Given the address stream in the table, and the initial TLB and page table states shown above, show the final state of the system also list for each reference if it is a hit in the TLB, a hit in the page table or a page fault. But I think first i just need to know how does the TLB work with these other elements and how to determine things. How do I even start to answer this question?

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  • How are Programing Language Designed?

    - by Anteater7171
    After doing a bit of programing, I've become quite curious on language design itself. I'm still a novice (I've been doing it for about a year), so the majority of my code pertains to only two fields (GUI design in Python and basic algorithms in C/C++). I have become intrigued with how the actual languages themselves are written. I mean this in both senses. Such as how it was literally written (ie, what language the language was written in). As well as various features like white spacing (Python) or object orientation (C++ and Python). Where would one start learning how to write a language? What are some of the fundamentals of language design, things that would make it a "complete" language?

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  • Models, controllers, and code reuse

    - by user11715
    I have a blog where users can post comments. When creating a comment, various things happen: creating the comment object, associations, persisting sending notification emails to post's author given his preferences sending notification to moderators given their preferences updating a fulltext database for search ... I could put all this in the controller, but what if I want to reuse this code ? e.g. I would like to provide an API for posting comments. I could also put this in the model, but I wonder if I won't lose flexibility by doing so. And would it be acceptable to do all of this from the model layer ? What would you do ?

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  • Dangerous programming

    - by benhowdle89
    Ok, i'm talking pure software/web, i'm not on about code to power Life Support machines or NASA rockets. In terms of software/web development what is the most dangerous single piece of code someone could put into a program (say if they had a grudge against a client/employee) In PHP, the first thing that comes to mind is some sort of file deletion: function EmptyDir($dir) { $handle=opendir($dir); while (($file = readdir($handle))!==false) { echo "$file <br>"; @unlink($dir.'/'.$file); } closedir($handle); } EmptyDir('images'); Or a PHP script that takes a user's sensitive input and posts it to Google sitemap or something? I hope this doesnt get closed off as subjective as there surely must be a ranking order of dangerous code. So i'm asking for the No.1 spot :) DISCLAIMER: I have no grudges against anyone, just curious for the answer!

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  • Beta Testing iOS Application

    - by dbramhall
    I was wondering if it is advisable to get a small team of beta testers for an iOS application that will be released to the App Store. I am developing an iOS application and I have setup a beta application form however I was wondering if it is advisable to even do beta testing considering I am actively testing and using my application on all of my own iOS devices (iPad 2, 2 iPod Touches and an iPhone 4 (plus, of course iOS Simulator)) - all running various versions of iOS 4. My question is: would you advise someone to get beta testers for an iOS application and, if so, how would you advise them to go about getting testers. For those interested, my application is at http://affogato.visioa.com/

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  • Small projects using the cathedral model: does open-source lower security?

    - by Anto
    We know of Linus' law: With enough eyeballs all bugs are shallow In general, people seem to say that open-source software is more secure because of that very thing, but... There are many small OSS projects with just 1 or 2 developers (the cathedral model, as described by ESR). For these projects, does releasing the source-code actually lower the security? For projects like the Linux kernel there are thousands of developers and security vulnerabilities are quite likely going to be found, but when just some few people look through the source code, while allowing crackers (black hat hackers) to see the source as well, is the security lowered instead of increased? I know that the security advantage closed-source software has over OSS is security through obscurity, which isn't good (at all), but it could help to some degree, at least by giving those few devs some more time (security through obscurity doesn't help with the if but with the when). EDIT: The question isn't whether OSS is more secure than non-OSS software but if the advantages for crackers are greater than the advantages for the developers who want to prevent security vulnerabilities from being exploited.

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  • Does TDD really work for complex projects?

    - by Amir Rezaei
    I’m asking this question regarding problems I have experienced during TDD projects. I have noticed the following challenges when creating unit tests. Generating and maintaining mock data It’s hard and unrealistic to maintain large mock data. It’s is even harder when database structure undergoes changes. Testing GUI Even with MVVM and ability to test GUI, it takes a lot of code to reproduce the GUI scenario. Testing the business I have experience that TDD works well if you limit it to simple business logic. However complex business logic is hard to test since the number of combinations of tests (test space) is very large. Contradiction in requirements In reality it’s hard to capture all requirements under analysis and design. Many times one note requirements lead to contradiction because the project is complex. The contradiction is found late under implementation phase. TDD requires that requirements are 100% correct. In such cases one could expect that conflicting requirements would be captured during creating of tests. But the problem is that this isn’t the case in complex scenarios. I have read this question: Why does TDD work? Does TDD really work for complex enterprise projects, or is it practically limit to project type?

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  • Best Practices and Etiquette for Setting up Email Notifications

    - by George Stocker
    If you were going to set up a Email Alerts for the customers of your website to subscribe to, what rules of etiquette ought to be followed? I can think of a few off the top of my head: Users can Opt-Out Text Only (Or tasteful Remote Images) Not sent out more than once a week Clients have fine-grained control over what they receive emails about (Only receive what they are interested in) What other points should I consider? From a programming standpoint, what is the best method for setting up and running email notifications? Should I use an ASP.NET Service? A Windows Service? What are the pitfalls to either? How should I log emails that are sent? I don't care if they're received, but I do need to be able to prove that I did or did not send an email.

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  • Confused about ASP.NET Ajax, jQuery and JavaScript

    - by Mr.Y
    Yesterday, I read couple of chapters on ASP.NET Ajax and jQuery from my ASP.NET 4 book and I found those frameworks pretty interesting and decide to learn more about them. Today, I borrowed some books from library on Ajax and JavaScript. It seems ASP.NET Ajax is different from Ajax and jQuery seems like the "new" JavaScript. Does it mean that I can skip JavaScript and learn jQuery directly? On the other hand, the non-ASP.NET Ajax book I borrowed seems to apply to the client side web programming only and looks quite different from what I learned from ASP.NET Ajax. If I'm an ASP.NET developer, I guess I should stick with ASP.NET Ajax instead of client side Ajax right? What about PHP? Is there a "PHP Ajax" similar to ASP.NET Ajax? It's not that I'm lazy to learn other tools, but I just want to focus on the right ones.

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  • Shared Data Source name error underscore characters added

    - by mick
    The name of our shared data source in RS (report server) is "AF1 Live Database" (no underscore characters - just spaces between words) and is the same in report builder in VS. However, the following error pops up when the RDL of this report is uploaded onto our company site and run. (error we are receiving...) The report server cannot process the report or shared dataset. The shared data source 'AF1_Live_Database' for the report server or SharePoint site is not valid. Browse to the server or site and select a shared data source. (rsInvalidDataSourceReference) We have no idea why the error reports the shared data source as 'AF1_Live_Database' with underscore characters? As this appears to be the problem that keeps the report from running we are seeking your help, thanks.

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  • Is SugarCRM really adequate for custom development (or adequate at all)? [closed]

    - by dukeofgaming
    Have you used SugarCRM for custom development successfully?, if so, have you done it programmatically or through the Module Builder? Were you successful? If not, why? I used SugarCRM for a project about two years ago, I ran into errors from the very installation, having to hack the actual installation file to deploy the software in the server and other erros that I can't recall now. Two years after, I'm picking it up for a project once again. I'm feeling like I should have developed the whole thing from scratch myself. Some examples: I couldn't install it in the server (again). I had to install it locally, then copy the files and database over to the server and manually edit the config file. Constantly getting deployment errors from the module builder. One reason is SugarCRM keeps creating a record in the upgrade_history table for a file that does not exist, I keep deleting such record and it keeps coming back corrupt. I get other deployment errors, but have not figured them out. then I have to rollback all files and database to try again. I deleted a custom module with relationships, the relationships stayed in the other modules and cannot be deleted anymore, PHP warnings all over the place. Quick create for custom modules does not appear, hack needed. Its whole cache directory is a joke, permanent data/files are stored there. The module builder interface disappears required fields. Edit the wrong thing, module builder won't deploy again, then pray Quick Repair and/or Rebuild Relationships do the trick. My impression of SugarCRM now is that, regardless of its pretty exterior and apparent functionality, it is a very low quality piece of software. This even scared me more: http://amplicate.com/hate/sugarcrm; a quote: I wis this info had been available when I tried to implement it 2 years ago... I searched high and low and the only info I found was positive. Yes, it's a piece of crap. The community edition was full of bugs... nothing worked. Essentially I got fired for implementing it. I'm glad though, because now I work for myself, am much happier and make more money... so, I should really thank SugarCRM for sucking so much I guess! I figured that perhaps some of you have had similar experiences, and have either sticked with SugarCRM or moved on to another solution. I'm very interested in knowing what your resolutions were -or your current situations are- to make up my own mind, since the project I'm working on is long term and I'm feeling SugarCRM will be more an obstacle than an aid. After further failed attempts to continue using this software I continued to stumble upon dead-ends when using the module editor, I could only recover from this errors by using version control. We are now moving on to a custom implementation using Symfony; perhaps if we were using it with its out-of-the-box modules we would have sticked with it.

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  • So what *did* Alan Kay really mean by the term "object-oriented"?

    - by Charlie Flowers
    Reportedly, Alan Kay is the inventor of the term "object oriented". And he is often quoted as having said that what we call OO today is not what he meant. For example, I just found this on Google: I made up the term 'object-oriented', and I can tell you I didn't have C++ in mind -- Alan Kay, OOPSLA '97 I vaguely remember hearing something pretty insightful about what he did mean. Something along the lines of "message passing". Do you know what he meant? Can you fill in more details of what he meant and how it differs from today's common OO? Please share some references if you have any. Thanks.

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  • Representation of data in application versus database

    - by user1815201
    I'm going to make an application that will be given data to put in a database. The data will for the most part be the same, but the way it is formatted will vary a lot (could be in anything from text files to .xls to .doc). I'm not a very experienced developer, but I can see some potential issues and I want to minimize them. First off I have decided to use the DAO pattern, so that I can easily support new file formats or file suddenly formatted in different ways. What I really wonder about though, is how I should manage the data itself within my application. I'm thinking that the database DAO should have models representing each table of the database with the same relations between them, to make the uploading process easy. But should the filesystem DAO's have to use the same models? I can imaging that when the database changes, the change will suddenly propagate throughout the entire system, all DAOs and models alike. And that is obviously a bad thing. I'm a little bit tired and out of time. Will update with what ever questions you have. Thanks!

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  • Why does editor color scheme preference seem to vary by language?

    - by Carl Manaster
    I've spent most of my career in C++ and Java, and like most of my peers I have the editor configured to display dark (black with dark-colored syntax highlighting) on a white background. I spent a day this week with Rubyists, and they all seem to favor light text on a dark background. I've observed this before. Why is it? What cultural differences between the Java and Ruby communities explain it? Or is it as simple as these are the default settings for our respective editors?

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  • How to create a Semantic Network like wordnet based on Wikipedia?

    - by Forbidden Overseer
    I am an undergraduate student and I have to create a Semantic Network based on Wikipedia. This Semantic Network would be similar to Wordnet(except for it is based on Wikipedia and is concerned with "streams of text/topics" rather than simple words etc.) and I am thinking of using the Wikipedia XML dumps for the purpose. I guess I need to learn parsing an XML and "some other things" related to NLP and probably Machine Learning, but I am no way sure about anything involved herein after the XML parsing. Is the starting step: XML dump parsing into text a good idea/step? Any alternatives? What would be the steps involved after parsing XML into text to create a functional Semantic Network? What are the things/concepts I should learn in order to do them? I am not directly asking for book recommendations, but if you have read a book/article that teaches any thing related/helpful, please mention them. This may include a refernce to already existing implementations regarding the subject. Please correct me if I was wrong somewhere. Thanks!

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  • Why use try … finally without a catch clause?

    - by Nick Rosencrantz
    The classical way to program is with try / catch but when is it appropriate to use try without catch? In Python the following appears legal and can make sense: try: #do work finally: #do something unconditional But we didn't catch anything. Similarly one could think in Java it would be try { //for example try to get a database connection } finally { //closeConnection(connection) } It looks good and suddenly I don't have to worry about exception types etc. But if this is good practice, when is it good practice? Or reasons why this is not good practice or not legal (I didn't compile the source I'm asking about and it could be a syntax error for Java but I checked that the Python surely compiles.) A related problem I've run into is that I continue writing the function / method and at the end I must return something and I'm in a place which should not be reached and it must be a return point so even if I handle the exceptions above I'm still returning null or an empty string at some point in the code which should not be reached, often the end of the method / function. I've always managed to restructure to code so that I don't have to return null since that absolutely appears to look like less than good practice.

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  • Are there any companies using BDD in a .NET environment?

    - by Nick
    I've seen BDD in action (in this case using SpecFlow and Selenium in a .NET environment) for a small test project. I was very impressed - mainly due to the fact that the language used to specify the acceptance tests meant they engaged with the product owner much more easily. I'm now keen to bring this into my current organisation. However I'm asked 'who else uses this?' and 'show me some case-studies'. Unfortunately I cannot find any 'big names' (or even 'small names' for that matter!) of companies who are actively using BDD. I have two questions really: Is BDD adopted by companies out there? Who are they? How can BDD be implemented in an agile .NET environment and are there any significant drawbacks to doing it?

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  • Why binding is not a native feature in most of the languages?

    - by Gulshan
    IMHO binding a variable to another variable or an expression is a very common scenario in mathematics. In fact, in the beginning, many students think the assignment operator(=) is some kind of binding. But in most of the languages, binding is not supported as a native feature. In some languages like C#, binding is supported in some cases with some conditions fulfilled. But IMHO implementing this as a native feature was as simple as changing the following code- int a,b,sum; sum := a + b; a = 10; b = 20; a++; to this- int a,b,sum; a = 10; sum = a + b; b = 20; sum = a + b; a++; sum = a + b; Meaning placing the binding instruction as assignments after every instruction changing values of any of the variable contained in the expression at right side. After this, trimming redundant instructions (or optimization in assembly after compilation) will do. So, why it is not supported natively in most of the languages. Specially in the C-family of languages? Update: From different opinions, I think I should define this proposed "binding" more precisely- This is one way binding. Only sum is bound to a+b, not the vice versa. The scope of the binding is local. Once the binding is established, it cannot be changed. Meaning, once sum is bound to a+b, sum will always be a+b. Hope the idea is clearer now. Update 2: I just wanted this P# feature. Hope it will be there in future.

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  • Diagram that could explain a state machine's code?

    - by Incognito
    We have a lot of concepts in making diagrams like UML and flowcharting or just making up whatever boxes-and-arrows combination works at the time, but I'm looking at doing a visual diagram on something that's actually really complex. State machines like those that parse HTML or regular expressions tend to be very long and complicated bits of code. For example, this is the stateLoop for FireFox 9 beta. It's actually generated by another file, but this is the code that runs. How can I diagram something with the complexity of this in a way that explains flow of the code without taking it to a level where I draw every single line-of-code into it's own box on a flowchart? I don't want to draw "Invoke loop, then return" but I don't want to explain every last detail. What kind of graph is suitable to do this? Is there already something out there similar to this? Just an example of how to do this without going overboard in complexity or too-high-level is really what I want. If you don't feel like looking at the code, basically it's 70 different state flags that could occur, inside an infinite loop that exists to a label based on some conditions, each flag has it's own infinite loop that exists to a label somewhere, and each of those loops has checks for different types of chars, which then runs off into various other methods.

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  • What is so good about Linux? [closed]

    - by Chris Bridgett
    Self-explanatory question title. I've only ever used Windows OS's (except Mac OSX at friends etc, years ago occasionally) and when diving into the world of programming, Linux is a name that is coming up every other tutorial or article. All my web hosts run Linux and a lot of programming literature covers how to go about various tasks on Linux as well as Windows, but other than the odd raving I've read years ago about Linux being less resource-intensive, I haven't really given it much thought. Any article I read about Linux and whether it should be used for... 'regular' use, it's shunned since any windows applications I'm familiar with will usually require the windows API and there's no end of 'hacking' to get various programs working on Linux. As far as I understand a GUI is optional on Linux too? This all sounds very noobish I'm sure, but we all start somewhere, so: What is Linux good for? What should Linux be used for?

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  • Is there a language where collections can be used as objects without altering the behavior?

    - by Dokkat
    Is there a language where collections can be used as objects without altering the behavior? As an example, first, imagine those functions work: function capitalize(str) //suppose this *modifies* a string object capitalizing it function greet(person): print("Hello, " + person) capitalize("pedro") >> "Pedro" greet("Pedro") >> "Hello, Pedro" Now, suppose we define a standard collection with some strings: people = ["ed","steve","john"] Then, this will call toUpper() on each object on that list people.toUpper() >> ["Ed","Steve","John"] And this will call greet once for EACH people on the list, instead of sending the list as argument greet(people) >> "Hello, Ed" >> "Hello, Steve" >> "Hello, John"

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