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• Oracle announces Brand New Tuxedo 11g Release

  - by ruma.sanyal

  Today Oracle introduced two brand new products within the Tuxedo product line of its application grid portfolio. Oracle Tuxedo Application Runtime for CICS and Batch and Oracle Application Rehosting Workbench provide the ability to automate rehosting of mainframe Online and Batch applications to open systems running under Oracle Tuxedo. Oracle Application Rehosting Workbench automates adaptation of COBOL programs, JCL conversion for batch applications, and migration of VSAM files and DB2 data schema. Migration cost, risk, and project length and complexity are dramatically reduced with over 90% of application assets re-hosted on open systems 'as-is'. Impact on the organization is minimized - users are protected from change by support for 3270 green screens, and developers continue to use familiar CICS APIs, batxh functions, and common utilities. Other major features of this release are as follows: - Hotpluggability through introduction of Oracle Tuxedo JCA Adapter - Metadata driven application development using SCA programming model - Support for Python and Ruby languages to develop business services - Improved scalability and availability, TSAM enhancements Register for a live webinar with Oracle Fusion Middleware Senior VP Hasan Rizvi Read the press release Find more details on these exciting new products

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• Changing Platform

  - by Liam McLennan

  From time to time a developer makes a break from their platform of choice (.NET, Java, VB, Access, COBOL) and moves to perceived greener pastures. Zed Shaw did it, jumping from Ruby to Python, and Mike Gunderloy went from .NET to Rails. But it can be difficult to change platform. My clients don’t come to me looking for  a software developer, they come looking for a .NET developer. This is a tragic side effect of big software companies marketing. If your village is under attack by bandits, would you turn away the first seven samurai who offered to help because you didn’t like their swords? What matters is how effectively they can defend your village. You should not tell your carpenter what sort of hammer to use and you should not tell your software developer what platform to use.

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• Sharing classes between projects in xcode/objective-c

  - by Allyn

  Hey folks, I've got a client<=server app I'm building for Mac OS X, using Objective-c/Cocoa and xCode. I've created a different project for both the apps I have, and I'm wondering the best way to share classes between them. There are several classes I've made that would be useful to both. This far I've been copying them around, but I feel like this isn't the best solution. How do I share classes effectively? Should I redo it as 1 project and just have two build targets? How do I do this? Any other info? Thanks.

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• How do I explain to HR that my work experience is relevant even if it doesn't match the keywords in the job description?

  - by Dmitri

  I am looking at a job with a great company and in a field that I really want to be in. Unfortunalty, what they want is someone with "experience with ASP (VB), T-SQL in a production environment." But I've never done anything except with FOSS tools: C, Ruby(straight and RoR), Perl, MySQL, et c. I'm thinking that I could probably pick up VB without much trouble (I took a class that used it on college, was impressed at how easy it was to construct Windows UIs, but I've never needed it) Is there any way that I can demonstrate that my experience is similar? What would equivalent experience be in the FOSS world?

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• Design patterns and multiple programming languages

  - by Eduard Florinescu

  I am referring here to the design patterns found in the GOF book. First, how I see it, there are a few peculiarities to design pattern and knowing multiple languages, for example in Java you really need a singleton but in Python you can do without it you write a module, I saw somewhere a wiki trying to write all GOF patterns for JavaScript and all the entries were empty, I guess because it might be a daunting task to do that adaptation. If there is someone who is using design patterns and is programming multiple languages supporting the OOP paradigm and can give me a hint on how should I approach design patterns. An approach that might help me in all languages I use(Java, JavaScript, Python, Ruby): Can I write good application without knowing exactly the GOF design patterns or I might need just some of them which might be crucial and if yes which one, are there alternatives to GOF for specific languages, and should a programmer or a team make their own design patterns set?

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• How to burn an Audio CD programmatically in Mac OS X

  - by Adion

  All the info I can find about burning cd's is for Windows, or about full programs to burn cd's. I would however like to be able to burn an Audio CD directly from within my program. I don't mind using Cocoa or Carbon, or if there are no API's available to do this directly, using a command-line program that can use a wav/aiff file as input would be a possibility too if it can be distributed with my application. Because it will be used to burn dj mixes to cd, it would also be great if it is possible to create different tracks without a gap between them.

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• Calculate broadcast address from ip and subnet mask

  - by Kolja

  Hi I want to calculate the broadcast address for e.g -IP 192.168.3.1 -Subnet 255.255.255.0 =192.168.3.255 in C. I know the way (doing fancy bitwise OR's between the inversed IP and Subnet), but my problem is I come from the green fields of MacOSX Cocoa programing. I looked into the source of ipcal, but wasn't able to integrate it into my code base. There must be a simple 10 line of code example somewhere on the internet, I just can't find it. Could someone point me to a 10 line of code example of how to do it in C. Cheers, Kolja

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• Using C Structs which contains ObjC Objects?

  - by GuidoMB

  I'm using C structs in objc and I've created a function that assembles the structure like the one from the Cocoa API. The things is that this structure is not like NSRect o NSPoint this structure packs objc objects soo I'm seeing a potential memory leak here. Do I need to provide a function to 'release' the structure? I'am not creating a ISKNewsCategory class because there will be no behavior but Do you think this is a good approach or I should define the class even doe there will be no behavior? typedef struct ISK_NewsCategory { NSString *name; NSString *code } ISKNewsCategory; NS_INLINE ISKNewsCategory ISKMakeNewsCategory(NSString *name, NSString *code) { ISKNewsCategory category; category.name = [name retain]; category.code = [code retain]; return category; }

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• Software Craftsman Pilgrimage Comes Together

  - by Liam McLennan

  Last week on Software Craftsman Pilgrimage I was trying to organise where I will be travelling, and the companies I will be pairing with. I now have a confirmed itinerary. 9 - 11th April Alt.NET Seattle 12th April Craftsman visit with Didit (Long Island) 13th April rest day :) 14th April Craftsman visit with Obtiva (Chicago) 15th – 16th April Craftsman visit with 8th Light (Chicago) 17th – 18th April Seattle Code Camp I am looking forward to all of my visits and talking to all the smart people who work there. I will be blogging my progress and hopefully shooting some video. If you are in Seattle, New York or Chicago and would like to meet up to chat about craftsmanship, programming, ruby or .NET please email me.

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• UITableView's cellForRowAtIndexPath is not getting called after low memory warning

  - by Jinesh

  I am new to COCOA and Objective C. I am working on an application which have two controllers with one table view in each, clicking an item form this table will lead to another controller to be pushed to the stack. All was working fine till i started handling low memory warning in app delegate. What i am doing in app delegate's applicationDidReceiveMemoryWarning is, deleting all of my model and popping out all controllers to its root view using popToRootViewControllerAnimated. Now my problem starts, once low mem warning is received table's cellForRowAtIndexPath is not getting called. All other methods of UITableViewDataSource is properly called. What i get on screen is a blank white screen. I am testing my app in iPhone OS 3.0 and development is done in Xcode V 3.1.3. Hope you guys can help me to nail this. Thanks in advance, Jinesh.

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• Is it a bad practice to store large files (10 MB) in a database?

  - by B Seven

  I am currently creating a web application that allows users to store and share files, 1 MB - 10 MB in size. It seems to me that storing the files in a database will significantly slow down database access. Is this a valid concern? Is it better to store the files in the file system and save the file name and path in the database? Are there any best practices related to storing files when working with a database? I am working in PHP and MySQL for this project, but is the issue the same for most environments (Ruby on Rails, PHP, .NET) and databases (MySQL, PostgreSQL).

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• Subclassing UIScrollView for drawing w/o views

  - by David Dunham

  I'm contemplating subclassing UIScrollView (the way UITextView does) to draw a fairly large amount of text (formatted in ways that NSTextView can't). So far the view won't actually scroll. I'm setting contentSize, and when I drag, I see the scroll indicator. But nothing changes (and I don't get a drawRect: message). An alternate approach is to use a child view, and I've done this. The view can be over 5000 pixels high, however, and I'm a bit concerned about performance on an actual device. (The other approach, be like UITableView, would be a huge pain -- I'm "porting" Mac Cocoa code, and a collection of views would be a huge architecture change.) I've done some searching, but haven't found anyone who is using UIScrollView to do the drawing. Has anyone done this and know of any pitfalls?

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• data maintenance/migrations in image based sytems

  - by User

  Web applications usually have a database. The code and the database work hand in hand together. Therefore Frameworks like Ruby on Rails and Django create migration files Sure there are also servers written in Self or Smalltalk or other image-based systems that face the same problem: Code is not written on the server but in a separate image of the programmer. How do these systems deal with a changing schema, changing classes/prototypes. Which way do the migrations go? Example: What is the process of a new attribute going from programmer's idea to the server code and all objects? I found the Gemstone/S manual chapter 8 but it does not really talk about the process of shipping code to the server.

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• Starting a career in quantitative finance

  - by Vitor Braga

  I've been reading John Hull book (Options, Futures and Other Derivatives) mostly on curiosity. I've read other books about financial markets in the past (like Elder's Trading for Living and the novel Reminiscences of a Stock Operator). But I'm really hooked by the John Hull book. My background is mostly scientific computing: number crunching, visualization and image processing. Mostly in C++, with some C, Fortran, Python, Ruby here and there. I've been thinking on moving on to quantitative finance - I'd like to do that. What would be the best way to start? Any tips?

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• Core Data store corruption

  - by sehugg

  A handful of customers for my iPhone app are experiencing Core Data store corruption (I assume so, since the error is "Failed to save to data store: Operation could not be completed. (Cocoa error 259.)") Has anyone else experienced this kind of store corruption? I am worried since I aim to soon push an update which performs a schema migration, and I am worried that this will expose even more problems. I had assumed that the Core Data/SQLlite APIs use atomic operations and are immune to corruption except if the underlying filesystem experiences corruption. Is there a way to reduce/prevent corruption, or at least a good way to reproduce (I have been unsuccessful thus far).

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• iphone core data app crash

  - by satyam

  I'm able to complete my iphone app using core data internally. But for the first time when I'm running in simulator or on device its crashing with following error: 2010-03-18 10:55:41.785 CrData[1605:4603] Unresolved error Error Domain=NSCocoaErrorDomain Code=513 UserInfo=0x50448d0 "Operation could not be completed. (Cocoa error 513.)", { NSUnderlyingException = Error validating url for store; } When I run the app again in simulator or on device, its running perfectly. I'm not able to identify the exact problem. Can some one guide me on how to proceed further???

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• Does Dart have any useful features for web programmers?

  - by marko

  http://www.dartlang.org/ I've checked out the site very briefly, and got curious. Is there any advantages of using Dart? Is it just a replacement for JavaScript? It looks like simpler Java. Writing quite a lot of C# at work, the language feels very much like what I'm used to, so learning the syntax looks like a breeze to learn. Has anybody any opinions or experiences with the language? (Compared to CoffeeScript (= I'm not doing Ruby syntax) the syntax looks more familiar to me).

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• iTunes Apple Events API

  - by jldupont

  I'd like to control iTunes through Objective-C ( I just can't get Python appscript installed correctly on my OS/X 10.6.3 system ... that would have been my first choice ). From what I gather, the IPC on Cocoa is based on Apple Events : is there either: Online documentation on iTunes / Apple Events API ? Instrospection mechanism to get to iTunes API? I know about Applescript Editor / Open Dictionary functionality but I can't figure out how to translate the information I see into IPC calls. Note: I have already tried working out a solution through PyObjC but the main function I am after is track searching which I can't figure out. Disclaimer: OS/X super-newbie here.

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• How to access the theming Fonts and Colors on GTK/Gnome

  - by Lothar

  Lets say i want to write a special text editor widget. How can i get the default themed colors for texts, selected text and background and which are the users default fonts? I see that GNOME does define 5 special system fonts and default sizes for this purpose in the GNOME Appearance Configuration dialog, but i haven't found a single word in the GTK documentation how to access them (and the GTK mailing list is a joke:-( ). Windows and Cocoa both give me dozens of system values. I found the GtkStyle class but this doesn't seem to be what i need.

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• Does syntax really matter in a programming language?

  - by Saif al Harthi

  One of my professors says "the syntax is the UI of a programming language", languages like Ruby have great readability and it's growing, but we see a lot of programmers productive with C\C++, so as programmers does it really matter that the syntax should be acceptable? I would love to know your opinion on that. Disclaimer: I'm not trying to start an argument. I thought this is a good topic of discussion. Update: This turns out to be a good topic. I'm glad you are all participating in it.

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• How do I write a good talk proposal for a FOSS programming conference?

  - by Andrew Grimm

  I'm hoping to give a talk at RubyKaigi this year, and I'd like to know what makes a good talk proposal. RubyKaigi is a conference run by Ruby enthusiasts (as opposed to it being a trade conference, or an academic conference). The proposal form can be seen here. So far, my draft proposal about a program I'm working on mentions: What the program is useful for and why it is relevant. How it works. What topics it touches upon (such as metaprogramming and testing) Is there anything that I should mention in my proposal? Also, how thorough should I be in my "Details of your talk" section? Should I be exhaustive, or only have a couple of short paragraphs?

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• Is there a good book to grok C++?

  - by Paperflyer

  This question got me thinking. I would say I am a pretty experienced C++ programmer. I use it a lot at work, I had some courses on it at the university, I can understand most C++ code I find out there without problems. Other languages you can pretty much learn by using them. But every time I use a new C++ library or check out some new C++ code by someone I did not know before, I discover a new set of idioms C++ has to offer. Basically, this has lead me to believe that there is a lot of stuff in C++ that might be worth knowing but that is not easily discoverable. So, is there a good book for a somewhat experienced C++ programmer to step up the game? You know, to kind of 'get' that language the way you can 'get' Ruby or Objective-C, where everything just suddenly makes sense and you start instinctively knowing 'that C++ way of thing'?

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• Is there such a thing as too much experience?

  - by sunpech

  For modern software developers in today's world, is there such a thing as having too much experience with a certain technology or programming language? To a recruiter, interviewer, or company hiring-- could there often be cases where a particular candidate has so much experience in a certain area or technology where it works against the candidate to being hired? I'm not talking about cases where a senior developer is applying for an entry-level developer position, and has a lot of experience in that sense. Nor am I talking about cases where a candidate is outright lying (e.g. 20+ years experience with Ruby on Rails). I've overheard this in conversations between hiring managers/developers during happy hours, yet I'm not quite sure I fully understand what they mean.

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• Cyclic Dependencies.

  - by PhilCK

  Are cyclic dependencies a common thing in games dev? I ask as I keep getting into situation where I'm using and have been told more than once that they should be avoided. I am wondering if this is just a what people say as a general rule of thumb in the software development business. and that the nature of game programming produces such dependencies. // Foo #include <Bar.hpp> class Foo { bar& m_bar; }; and // Bar class Foo; class Bar { Foo* m_foo; }; I do this alot in Ruby, but dynamic languages are more forgiving in this instance, where as static ones, not so much.

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• Objective-C Plugin Architecture Security (Mac, not iphone)

  - by Tom Dalling

  I'm possibly writing a plugin system for a Cocoa application (Mac, not iphone). A common approach is the make each plugin a bundle, then inject the bundle into the main application. I'm concerned with the security implications of doing this, as the bundle will have complete access to the Objective-C runtime. I am especially concerned with a plugin having access to the code that handles registration and serial keys. Another plugin system we are considering is based on distributed notifications. Basically, each plugin will be a separate process, and they will communicate via distributed notifications only. Is there a way to load bundles securely (e.g. sandboxing)? If not, do you see any problems with using distributed notifications? Are there any other plugin architectures that would be better?

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