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  • How to improve Algorithmic Programming Solving skill? [closed]

    - by gaurav
    Possible Duplicate: How can I improve my problem-solving ability? How do you improve your problem solving skills? Should I learn design patterns or algorithms to improve my logical thinking skills? What to do when you're faced with a problem that you can't solve quickly? Are there non-programming related activities akin to solving programming problems? I am a computer engineering graduate. I have studied programming since three years. I am good in coding and programming. I have been trying to compete in algorithmic competitions on sites such as topcoder,spoj since one and a half year, but I am still unable to solve problems other than too easy problems. I have learned from people that it takes practice to solve such problems. I try to solve those problems but sometimes I am unable to understand and even if I do understand I am unable to think of a good algorithm for solving it. Even if I solve I get Wrong answer and I am unable to figure out what is the problem with my code as it works on samples given on the sites but fails on test cases which they do not provide. I really want to solve those problems and become good in algorithms. I have read books for learning algorithms like Introduction to algorithms by CLRS,practicing programming questions. I have gone through some questions but they don't answer this question. I have seen the questions which are said duplicates but those questions focus on overall programming, but I am asking for algorithm related programming, basically for competing in programming which involve solving a problem statement then online judge will automatically evaluate it, such type of programming is quite different from the type of programming these questions discuss.

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  • What characteristic of a software determines its operational scope?

    - by Dark Star1
    How can I classify whether a software is a medium with the ability to grow into an enterprise level software or whether it is already there? And how should I use the information to choose the appropriate language/tool to create the software? At first I was asking whether Java or PHP is the best tool to design enterprise level software, however I've suddenly realized that I am unable to put the software I'm tasked with redesigning into the proper scope so I'm lost. Edit: I guess I'm looking for tell tale signs in software that may tip the favour towards enterprise level type software in the sense of functional and operational characteristics; functional: what it does (multi-functional), Architectural characteristics such as highly modular. operational: multi-sourced and multi-homed, databases, e.t.c. To be honest the reason I ask is because I'm skeptical about the use of PhP to design a piece of employee and partial accounting software. I'm more tipping towards the use of JSP and an hmvc framework such as JSF, wickets, e.t.c. where as the other guy wants to go the PhP way although I'm not experienced with PhP, as far as I know it's not an OO oriented language hence my skepticsm towards it.

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  • Need help deciding if Joomla! experience as a good metric for hiring a particular prospective employee.

    - by Stephen
    My company has been looking to hire a PHP developer. Some of the requirements for the job include: an understanding of design patterns, particularly MVC. some knowledge of PHP 5.3's new features. experience working with a PHP framework (it doesn't matter which one). I interviewed a man today who's primary work experience involved working with Joomla!. As an employee, he will be required to work on existing and new web applications that use Zend Framework, CakePHP and/or CodeIgniter. It is my opinion that we shouldn't dismiss hiring a developer just because he has not used the same technologies that he'll be using on the job. So, I'd like to know about the kind of coding experience working with Joomla! can provide. I've never bothered to take more than a brief look (if that) at the Joomla! package, so I'm hoping to lean on the knowledge of my peers. Would you consider Joomla! to contain a professional code-base? Is the package well organized, and/or OO in general, or is it more like WordPress where logic and presentation are commingled? When working with Joomla!, is the developer encouraged to use best practices? In your opinion, would experience working with Joomla! garner the skills needed to get up to speed with Zend or CakePHP quickly, or will there be a steep learning curve ahead of the developer? I'm not saying that Joomla! is a bad technology, or even that it is lower on the totem pole when compared to the frameworks I've mentioned. Maybe it's awesome, I dunno. I simply have no idea!

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  • Computer Bugs - Etymology and Entomology

    - by PointsToShare
    Whatever bugs you My wife and I used to take some of our summer vacation I a cabin on the shore of Lake Atsion in NJ. I t is a delightful place in the Wharton forest with Brown yet fresh water, where we would canoe, swim and enjoy true rest. Alas, in the last few years, yellow flies also discovered the area’s pastoral delights and came in hoards to bug us. So much so that we had to give up. As a computer programmer I abhor bugs. The bugs that bug me – except the pesky yellow flies – are program bugs , a specific variety of computer bugs. You can find an excellent take on the etymology of the word ‘bug” in this delightful monogram: http://www.jamesshuggins.com/h/tek1/first_computer_bug.htm In my youth, I worked on Burroughs computers. Unlike their IBM brethren, the Burroughs used a 96 column card. The cards were much smaller than the 80 column IBM cards. We wrote our programs on coding sheets and then a key-punch operator transcribed them into punched cards. These were fed into a card reader and compiled. The compiler would notify us of compiler errors or bugs, but it was not always easy to get the meaning of the message. My friend Mark Wildt, also a Burroughs veteran, gave me an old punched card from one of his programs. Obviously a bug!! Here It Is!! That’s All Folks!

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  • Is it just me or is this a baffling tech interview question

    - by Matthew Patrick Cashatt
    Background I was just asked in a tech interview to write an algorithm to traverse an "object" (notice the quotes) where A is equal to B and B is equal to C and A is equal to C. That's it. That is all the information I was given. I asked the interviewer what the goal was but apparently there wasn't one, just "traverse" the "object". I don't know about anyone else, but this seems like a silly question to me. I asked again, "am I searching for a value?". Nope. Just "traverse" it. Why would I ever want to endlessly loop through this "object"?? To melt my processor maybe?? The answer according to the interviewer was that I should have written a recursive function. OK, so why not simply ask me to write a recursive function? And who would write a recursive function that never ends? My question: Is this a valid question to the rest of you and, if so, can you provide a hint as to what I might be missing? Perhaps I am thinking too hard about solving real world problems. I have been successfully coding for a long time but this tech interview process makes me feel like I don't know anything. Final Answer: CLOWN TRAVERSAL!!! (See @Matt's answer below) Thanks! Matt

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  • Programming and Ubiquitous Language (DDD) in a non-English domain

    - by Sandor Drieënhuizen
    I know there are some questions already here that are closely related to this subject but none of them take Ubquitous Language as the starting point so I think that justifies this question. For those who don't know: Ubiquitous Language is the concept of defining a (both spoken and written) language that is equally used across developers and domain experts to avoid inconsistencies and miscommunication due to translation problems and misunderstanding. You will see the same terminology show up in code, conversations between any team member, functional specs and whatnot. So, what I was wondering about is how to deal with Ubiquitous Language in non-English domains. Personally, I strongly favor writing programming code in English completely, including comments but ofcourse excluding constants and resources. However, in a non-English domain, I'm forced to make a decision either to: Write code reflecting the Ubiquitous Language in the natural language of the domain. Translate the Ubiquitous Language to English and stop communicating in the natural language of the domain. Define a table that defines how the Ubiquitous Language translates to English. Here are some of my thoughts based on these options: 1) I have a strong aversion against mixed-language code, that is coding using type/member/variable names etc. that are non-English. Most programming languages 'breathe' English to a large extent and most of the technical literature, design pattern names etc. are in English as well. Therefore, in most cases there's just no way of writing code entirely in a non-English language so you end up with a mixed languages. 2) This will force the domain experts to start thinking and talking in the English equivalent of the UL, something that will probably not come naturally to them and therefore hinders communication significantly. 3) In this case, the developers communicate with the domain experts in their native language while the developers communicate with each other in English and most importantly, they write code using the English translation of the UL. I'm sure I don't want to go for the first option and I think option 3 is much better than option 2. What do you think? Am I missing other options?

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  • Displaying the Saved Pictures in the Windows Phone 8 emulator

    - by Laurent Bugnion
    One cool feature of the Windows Phone emulator is that it allows you to select pictures from your app (using the PhotoChooserTask) without having to try your app on a physical device. For example, this code (which I used in some of my recent presentations) will trigger the Photo Chooser UI to be displayed on the emulator too: private Action<IEnumerable<IImageFileInfo>> _callback; public void SelectFiles(Action<IEnumerable<IImageFileInfo>> callback) { var task = new PhotoChooserTask { ShowCamera = true }; task.Completed += TaskCompleted; _callback = callback; task.Show(); } void TaskCompleted(object sender, PhotoResult e) { if (e.Error == null && e.ChosenPhoto != null && _callback != null) { var fileName = e.OriginalFileName .Substring(e.OriginalFileName.LastIndexOf("\\") + 1); var info = new FileViewModel(e.ChosenPhoto, fileName); var infos = new List<IImageFileInfo> { info }; _callback(infos); } } In Windows Phone 8 however, when you execute this code, you will be shown an almost empty Photo Chooser UI: Notice that the “Saved Pictures” album is missing. At first I thought it was just not there at all, but you can actually restore it with the following steps: Press on the Windows button On the main screen, press on Photos Press on Albums Open the so called “8” photo album Press Back until you are back into your app and try again. This time you will see the saved pictures, and can perform your tests in more realistic conditions! Happy coding! Laurent   Laurent Bugnion (GalaSoft) Subscribe | Twitter | Facebook | Flickr | LinkedIn

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  • I can't install Ubuntu on my Dell Inspiron 15R at all

    - by Kieran Rimmer
    I'm attempting to install Ubuntu 12.04LTS, 64 bit onto a Dell Inspiron 15R laptop. I've shrunk down one of the windows partitions and even used gparted to format the vacant space as ext4. However, the install disk simply does not present any options when it comes to the partitioning step. What I get is a non-responsive blank table As well as the above, I've changed the BIOS settings so that USB emulation is disabled (as per Can't install on Dell Inspiron 15R), and changed the SATA Operation setting to all three possible options. Anyway, the install CD will bring up the trial version of ubuntu, and if I open terminal and type sudo fdisk -l, I get this: Disk /dev/sda: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0xb4fd9215 Device Boot Start End Blocks Id System /dev/sda1 63 80324 40131 de Dell Utility Partition 1 does not start on physical sector boundary. /dev/sda2 * 81920 29044735 14481408 7 HPFS/NTFS/exFAT /dev/sda3 29044736 1005142015 488048640 7 HPFS/NTFS/exFAT /dev/sda4 1005154920 1953520064 474182572+ 83 Linux Disk /dev/sdb: 32.0 GB, 32017047552 bytes 255 heads, 63 sectors/track, 3892 cylinders, total 62533296 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xb4fd923d Device Boot Start End Blocks Id System /dev/sdb1 2048 16775167 8386560 84 OS/2 hidden C: drive If I type 'sudo parted -l', I get: Model: ATA WDC WD10JPVT-75A (scsi) Disk /dev/sda: 1000GB Sector size (logical/physical): 512B/4096B Partition Table: msdos Number Start End Size Type File system Flags 1 32.3kB 41.1MB 41.1MB primary fat16 diag 2 41.9MB 14.9GB 14.8GB primary ntfs boot 3 14.9GB 515GB 500GB primary ntfs 4 515GB 1000GB 486GB primary ext4 Model: ATA SAMSUNG SSD PM83 (scsi) Disk /dev/sdb: 32.0GB Sector size (logical/physical): 512B/512B Partition Table: msdos Number Start End Size Type File system Flags 1 1049kB 8589MB 8588MB primary Warning: Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0 has been opened read-only. Error: Can't have a partition outside the disk! I've also tried a Kubuntu 12.04 and Linuxmint install disks, wityh the same problem. I'm completely lost here. Cheers, Kieran

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  • SQL SERVER 2008 – 2011 – Declare and Assign Variable in Single Statement

    - by pinaldave
    Many of us are tend to overlook simple things even if we are capable of doing complex work. In SQL Server 2008, inline variable assignment is available. This feature exists from last 3 years, but I hardly see its utilization. One of the common arguments was that as the project migrated from the earlier version, the feature disappears. I totally accept this argument and acknowledge it. However, my point is that this new feature should be used in all the new coding – what is your opinion? The code which we used in SQL Server 2005 and the earlier version is as follows: DECLARE @iVariable INT, @vVariable VARCHAR(100), @dDateTime DATETIME SET @iVariable = 1 SET @vVariable = 'myvar' SET @dDateTime = GETDATE() SELECT @iVariable iVar, @vVariable vVar, @dDateTime dDT GO The same should be re-written as following: DECLARE @iVariable INT = 1, @vVariable VARCHAR(100) = 'myvar', @dDateTime DATETIME = GETDATE() SELECT @iVariable iVar, @vVariable vVar, @dDateTime dDT GO I have started to use this new method to assign variables as I personally find it very easy to read as well write. Do you still use the earlier method to declare and assign variables? If yes, is there any particular reason or just an old routine? I am interested to hear about this. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: Pinal Dave, PostADay, SQL, SQL Authority, SQL Query, SQL Scripts, SQL Server, SQL Tips and Tricks, T SQL, Technology

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  • Are there open source alternatives to Bitbucket, Github, Kiln, and similar DVCS browsing and management tools?

    - by Ryan Taylor
    I am aware of several tools/services that provide DVCS browsing and management such as Bitbucket, Github, Kiln, SCM-Manager and Rhodecode. However, the use case I am considering is one such that: Any source code must reside on an employers internal servers. The solution must be open source. It should provide a Bitbucket or Github like experience, including a project wiki, repository browsing and management, and social coding aspects such as code review. The solution should have mercurial support (if not support for other DVCSs). Of these, only SCM-Manager and RhodeCode come close as they can be installed on your own servers and are open source. However they do not have the Bitbucket or Github experience. There is no issue tracker or wiki and the UI, while functional, is not up to par with Github or Bitbucket. I can get close with Trac or Redmine with their repository browsers but unfortunately they do not have any repository management capabilities. Are there other open source tools out there that would provide a similar experience to Bitbucket, Github or Kiln?

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  • How to Fix this specific Google "Fetch as Googlebot" error appearing on my Webmaster Tools?

    - by UXdesigner
    Good day, I'm currently finding out why I have lost all of my website's rank in google. I don't even appear in google results by the domain. But other sites do link me and they appear in the google results. I think it's all about leaving my site two months alone and finding out I had 20k in comment spam, which I completely deleted and fixed with filters and adding a new Disqus comment service. Thing is, I added my site to Google Webmaster Tools and I'm finding out several awful things. For example, when I click in Google Fetch As GoogleBot. I receive this error message below in response to my request. And I don't even know what's the real problem and how to fix it. I simply don't get it. This is what appears: Date: Wednesday, July 20, 2011 9:43:35 AM PDT Googlebot Type: Web Download Time (in milliseconds): 55 HTTP/1.1 403 Forbidden Date: Wed, 20 Jul 2011 16:43:36 GMT Server: Apache Vary: Accept-Encoding Content-Encoding: gzip Content-Length: 248 Keep-Alive: timeout=2, max=100 Connection: Keep-Alive Content-Type: text/html; charset=iso-8859-1 403 Forbidden Forbidden You don't have permission to access / on this server. Additionally, a 403 Forbidden error was encountered while trying to use an ErrorDocument to handle the request. Do you guys know anything about this problem ? I need to have Google crawl my site again. I used to have a really nice google result in the past three years. Now, there's nothing. thanks,

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  • Building Single Page Apps on the Microsoft Stack

    - by Stephen.Walther
    Thank you everyone who came to my talk last night on Building Single Page Apps on the Microsoft Stack. I’ve attached the slides and code samples below. Here’s a quick summary of the talk. I argued that Single Page Apps are better than traditional Server Side Apps because: Single Page Apps are Stateful – In a traditional server-side app, whenever you navigate to a new page, all of your previous state is lost. It is like rebooting your computer whenever you perform any action In a Single Page App, Your Presentation Layer is Not Miles Away – In a traditional server-side app, because everything happens on the server, your presentation layer is separated from the user by space and time. In a Single Page App, the presentation layer is in the browser and not the server (which is the right place for a presentation layer). A Single Page App Respects the Web – It is easier to take advantage of HTML5 and related standards when building a Single Page App. Next, I recommended using the following four technologies when building a web application: Knockout – This is how you create your presentation layer. ASP.NET Web API – This is how you expose JSON data from your web server and perform server-side validation. HTML5 – This is how you implement client-side validation. Sammy – This is how you implement client-side routing and create a Single Page App with multiple virtual pages. There are code samples in the download (look in the Samples folder) which demonstrate how all of these technologies work when building Single Page Apps. Powerpoint Sample Code

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  • When and why you should use void (instead of i.e. bool/int)

    - by Jonas
    I occasionally run into methods where a developer chose to return something which isn't critical to the function. I mean, when looking at the code, it apparently works just as nice as a void and after a moment of thought, I ask "Why?" Does this sound familiar? Sometimes I would agree that most often it is better to return something like a bool or int, rather then just do a void. I'm not sure though, in the big picture, about the pros and cons. Depending on situation, returning an int can make the caller aware of the amount of rows or objects affected by the method (e.g., 5 records saved to MSSQL). If a method like "InsertSomething" returns a boolean, I can have the method designed to return true if success, else false. The caller can choose to act or not on that information. On the other hand, May it lead to a less clear purpose of a method call? Bad coding often forces me to double-check the method content. If it returns something, it tells you that the method is of a type you have to do something with the returned result. Another issue would be, if the method implementation is unknown to you, what did the developer decide to return that isn't function critical? Of course you can comment it. The return value has to be processed, when the processing could be ended at the closing bracket of method. What happens under the hood? Did the called method get false because of a thrown error? Or did it return false due to the evaluated result? What are your experiences with this? How would you act on this?

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  • Junior developer introduction to job industry

    - by lady_killer
    I am a junior developer at my second working experience, the first one using PHP with WordPress and currently on Groovy on Grails. I like coding, I attend meetup to discuss technology etc but I still did not understand how to become a real professional with the "know how" attitude. I read Clean Coder, the author advises to spend 20 hours per week of my spare time to learn new technologies and to keep myself up to date. I do not find this realistic, if you want to have a bit of a social life, and I also noticed that learning at work, at least in the places where I worked, is not ideal. No support from seniors for new projects, no pair programming and code reviews, no company trainings, one hour a week tech meetings where seniors walk away after a bit because they already know the topic discussed and so on. Sometimes is quite hard to keep the motivation... My questions are: Is our industry supposed to be like this? Is there real team working in the sense of sharing knowledge and help juniors to get up to speed? Are we supposed to learn new technologies or technology features just in our spare time?Clean Coder says football players do not train during official matches and our working hours are like official matches, we should just perform and learn in other moments. Is it really like this? How can I improve my skills with no support? Is it enough to read books and try out the exercises and perhaps some katas? In almost 5 month of Groovy on Grails experience at work, I have never had the opportunity to create anything from scratch, just worked on existing issues where it was even really difficult to get the domain knowledge from senior devs.

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  • Mac OS needs Windows Live Writer &ndash; badly!

    - by digitaldias
    I recently bought a new  Macbook Pro (the 13” one) to dive into a new world of programming challenges as well as to get a more powerful netbook than my Packard Bell Dot which I’ve been using since last year. I’ve had immense pleasure using the netbook format and their small size in meetings (taking notes with XMind), surfing “anywhere”, and, of course blogging with windows live writer. So far the Mac is holding up, it’s sleek, responsive, and I’ve even begun looking at coding in Objective C with it, but in one arena, it is severely lacking: Blogging software. There is nothing that even comes close to Live Writer for getting your blog posts out. The few blogger applications that do exist on mac both look and feel medieval in comparison, AND some even cost money! It looks like some mac users actually install a virtual machine on their mac to run Windows XP just so they can use WLW. I’m not that extreme; instead, I’m hoping that the WLW team will write it’s awesome application as a Silverlight 4 app. That way, it would run on Mac and Windows (as a desktop app). I wonder if it will ever happen though…   PS: The image is of me, took it with the built-in camera on the mac and emailed it to the windows PC that I am writing on :)

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  • How do I stop my ethernet network connection from dropping?

    - by Sean Hill
    My ethernet-based network connection doesn't stay up consistently. I'm running a ping against the gateway and it will: Work for a minute Freeze, time out, or give multi-second response times Repeat If it's stuck and I disable/enable networking through the network manager applet everything will work fine again for a minute. After 280 packets transmitted I'm getting 41% packet loss. I've tried a different cable and connection to the gateway but this had no effect. The distance to the gateway is just about 3 feet. Seems to work fine if I switch over to Windows, but Ubuntu is my main OS and I can't even use it right now as I depend on the network. My setup... OS: Ubuntu 11.04, dual-booting Windows 7 Mobo: Gigabyte Z68X-UD4-B3 CPU: Intel Core i7 2600K Edit A little clarification... Network Manager is still showing me as connected, but I am unable to reach to gateway or anything beyond. At no point does NM suggest the connection is lost and calling ifconfig shows that I still have an IP address. I tried connecting to a different gateway with a different cable and the same problem arises. As requested: lspci | grep -i eth 07:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 06) dmesg | tail -f [ 14.024709] EXT4-fs (sda5): re-mounted. Opts: errors=remount-ro,commit=0 [ 14.026443] EXT4-fs (sda7): re-mounted. Opts: commit=0 [ 14.176101] hda-intel: IRQ timing workaround is activated for card #2. Suggest a bigger bdl_pos_adj. [ 23.917731] eth0: no IPv6 routers present [ 726.109697] r8169 0000:07:00.0: eth0: link up [ 733.169494] r8169 0000:07:00.0: eth0: link up [ 753.930119] r8169 0000:07:00.0: eth0: link up [ 880.787332] r8169 0000:07:00.0: eth0: link up [ 1159.161283] r8169 0000:07:00.0: eth0: link up [ 1406.623550] r8169 0000:07:00.0: eth0: link up Edit @roland-taylor: Network is always available under Windows. Pings do not timeout, applications do not complain of no network availability, large downloads are not interrupted or slowed.

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  • How to compile FFmpeg with x265 support?

    - by Levan
    Today I found out that x265 is already present in ffmpeg so I compiled ffmpeg with this guide Sadly libx265 did not work on ubuntu, however on windows I tried the same thing with zeranoe ffmpeg build and it worked without a problem. So do you think i did something wrong or it is not yet implemented in linux build (using that guide)? The results of the command ffmpeg -codecs | grep -i hevc show: ffmpeg version 2.1.git Copyright (c) 2000-2014 the FFmpeg developers built on Feb 19 2014 19:00:17 with gcc 4.8 (Ubuntu/Linaro 4.8.1-10ubuntu9) configuration: --prefix=/home/levan/ffmpeg_build --extra-cflags=-I/home/levan/ffmpeg_build/include --extra-ldflags=-L/home/levan/ffmpeg_build/lib --bindir=/home/levan/bin --extra-libs=-ldl --enable-gpl --enable-libass --enable-libfdk-aac --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-x11grab libavutil 52. 64.100 / 52. 64.100 libavcodec 55. 52.102 / 55. 52.102 libavformat 55. 33.100 / 55. 33.100 libavdevice 55. 10.100 / 55. 10.100 libavfilter 4. 1.102 / 4. 1.102 libswscale 2. 5.101 / 2. 5.101 libswresample 0. 17.104 / 0. 17.104 libpostproc 52. 3.100 / 52. 3.100 D.V.L. hevc H.265 / HEVC (High Efficiency Video Coding) Thank you for your time

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  • First steps with Oracle ADF Mobile for iOS and Android

    - by Bruno.Borges
    Oracle announced recently its new Mobile development platform, called Oracle ADF Mobile. With it, you can build truly Java applications, deploy and run real Java code on both Android and iOS with its self-contained Java runtime. It also comes with PhoneGap. which allows you to use any feature your phone offers, like sensors and camera. It's probably the most complete solution for mobile development out there, simply because with Oracle ADF Mobile, you can write Native, Hybrid or Web applications for your smartphone and tablet. Do you want to take a quick look on what can be done with it? Check out this video!  Now, to start with Oracle ADF Mobile, here are the first steps you will have to go through. Download Oracle JDeveloperGo to this link and download the install file for your environment (Windows, Linux-32bit or Generic) Install JDeveloper (of course)If you need help on this, look at the documentation (if you've downloaded 11gR2, click here) Download Oracle ADF Mobile BundleThis is the download page for Oracle ADF Mobile. Accept the license as usual at the top, and follow with the Download button. It will take you to another page, where you will see a table containing a download link. Click on it and it will start downloading a ZIP file. Start JDeveloperStart Oracle JDev. It may self update. Restart the IDE if you are asked to. Go to Help > Check for updates Click Next and make sure you are at the "Source" tab Select "Install From Local File" Select the Oracle ADF Mobile ZIP you downloaded on step 3 Finish the process   Now you have JDeveloper with Oracle ADF Mobile sucessfully installed! There are two great tutorials to start coding with ADF Mobile. Just choose your platform! Android Tutorial iOS Tutorial And have fun! :-) 

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  • Can One Get a Solid Programming Foundation Without Going To College/University?

    - by Daniel
    First, I have already searched the site and read all the previous "self-taught vs. college" topics. The majority of the answers defended that going to college was the best choice, for two main reasons: Going to college gives you the paper, which is essential to landing jobs, especially in tough economic times. Going to college gives you a solid programming base, teaching you the principles that will be essential regardless of the language/path you take after. Here comes my question: I am not worried about reason 1 at all, because I already have my own company (I build websites/ do affiliate marketing) and a stable financial situation, so I am pretty sure I won't need to look around for a job. I am worried about reason 2 though. That is, I want to make sure I'll have as solid a programming foundation as anyone else out there, and I am wondering if that is possible with self-learning. Suppose I take my time to study the very basics, like discrete maths, algorithm design, programming logic, computer architecture, Assembly, C programming, databases and data structures - mostly using books,online resources and lots of coding. Say I spend 1-2 years covering those basics. Do you think my foundation would be solid, or still lack in comparison to someone who went to college?

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  • Is paper indispensable in a programmer's everyday work?

    - by rwong
    As a programmer who work in a company whose vision is to make paperless office possible, is there any way I can work effectively while using less paper? I can list at least several kinds of papers I use quite often: Paper notebook, on which I do most of the pre-coding design work and ideas Books Temporary printouts of source code, though not so often (in color, with a 6 point font at 600 DPI) Sticky note, to remind myself of things that should be taken care of within a few days On the other hand, I also use a wiki and an office text editor. Once a while I would use a diagramming software to make a few flowcharts. Deeper questions: Is there a relationship between paper use and productivity? How can programmers help save the trees? Is paperless software development fundamentally different from paperless office? Related questions: Do you ever write code with pen and paper, and should we do it more often? What physical tools do you find useful to work as a programmer? What things are essential on a programmer's desk? Stuff every programmer needs while working Additional info, if it helps: Everyone has dual monitors. We have decent project management and issue tracking software (both web-based). Please be constructive. In particular, please give your answer to your peer programmers who wish to be flexible and are willing to change working style in order to become more productive as well as meeting certain their own personal values. Edited: I removed the company's view because it appears to be too flamebait. If you need to see my original words, go to the edit history. Deleted: Doxygen and whiteboard. Reason: disregarding my personal experience with these great tools, we never had to print out anything as a consequence of using/not using them. To see my original words, go to the edit history.

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  • Distinction between API and frontend-backend

    - by Jason
    I'm trying to write a "standard" business web site. By "standard", I mean this site runs the usual HTML5, CSS and Javascript for the front-end, a back-end (to process stuff), and runs MySQL for the database. It's a basic CRUD site: the front-end just makes pretty whatever the database has in store; the backend writes to the database whatever the user enters and does some processing. Just like most sites out there. In creating my Github repositories to begin coding, I've realized I don't understand the distinction between the front-end back-end, and the API. Another way of phrasing my question is: where does the API come into this picture? I'm going to list some more details and then questions I have - hopefully this gives you guys a better idea of what my actual question is, because I'm so confused that I don't know the specific question to ask. Some more details: I'd like to try the Model-View-Controller pattern. I don't know if this changes the question/answer. The API will be RESTful I'd like my back-end to use my own API instead of allowing the back-end to cheat and call special queries. I think this style is more consistent. My questions: Does the front-end call the back-end which calls the API? Or does the front-end just call the API instead of calling the back-end? Does the back-end just execute an API and the API returns control to the back-end (where the back-end acts as the ultimate controller, delegating tasks)? Long and detailed answers explaining the role of the API alongside the front-end back-end are encouraged. If the answer depends on the model of programming (models other than the Model-View-Controller pattern), please describe these other ways of thinking of the API. Thanks. I'm very confused.

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  • Too sell or give for free

    - by QAH
    Hello everyone! I am currently making a game that I was originally planning to sell. It is a simple 2D arcade style game for the PC. I've seen many indie games become popular and generate revenue from advertisements, but the game itself remains free. I need some advice on whether or not I should sell my game, release it for free with advertisements, or ask for donations and keep the game free. I feel that my game is fun, but of course the graphics aren't tip top because I am a programmer, not an artist. I just take screenshots of 3D models I get from Turbosquid and crop around it to make a sprite. Also, and I could be very wrong about this, it seems that there are more legal issues surrounding selling a game than making it free and generating revenue from advertisement, or asking for donations. If I am wrong, someone please correct me. Also, I am very interested in generating some revenue for my work, but that isn't at the very top of my list. I am in my last year of high school, soon to be going to college, and I am going to major in computer science/software engineering. So I am trying to gain some preliminary experience at home by coding stuff every day. One way of getting this experience is by making this game. So what do you think? What route should I take? What has worked well with other indie games? Thanks in advance.

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  • When does a Project Manager start in a project?

    - by johndoucette
    From a colleague of mine… “As a project manager, when do you typically like to get initially involved in the project? Is it better for the PM to be rolled on during the project kick-off, the first week, or is it better to roll-on the second week when things settle down?” My textbook answer is “the Project Manager is responsible for the successful completion and delivery of the expected outcome of the project through the following major tasks;” 1.    Identifying requirements 2.    Establishing clear and achievable objectives 3.    Balancing the competing demands for quality, scope, time, and cost 4.    Adapting the specifications, plans, and approach to the different concerns and expectations of the various stakeholders However; My colleague is often a lead technical consultant coming into a project alone to help a client solve a complex problem. As Magenic consultants, we all possess many of the “project managing” skills I talked about above and tend to be responsible for item #1 and #2 as well as the actual architecture/design tasks early in a project. When the real development begins and there is no PM involved, the project will quickly get harder to execute unless items #3 & #4 are assigned to a Project Manager. In software development, the concept of context switching between coding and other administrative activities is the hardest skill perfect. In my experience, I have rarely been introduced to someone who has mastered this skill. This is the limbo I was in when I was asked to become a PM -- while still developing. “Put down the code” was not only a profound statement, but looking back – a necessary one. Unless you are lucky to have found that one developer who is a superman, asking your developers (internal corporate or consultant) to perform #3 and #4 tasks, will surely take more time, allow opportunity for more scope, and eventually cost more. Project Managers are crucial to the overall success of a project, and I prefer them to start by taking ownership of delivery on day one.

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  • from Java to SAS

    - by Giovanni Rossi
    I am a seasoned python,java,...other programmer having a (fairly advanced) mathematical education (so I do understand statistics and data mining, for example) . For various reasons I am thinking to switch to SAS/BI area (I am naming SAS because it might be, for me, a possible way to enter in BI). My question, for whoever might have an experience of both: is it, in BI current state, worth it? I mean, the days of big ideas in BI for business seem to be over (there are the APIs, managers think that they know what you can do with them), and my mathematical background might turn out to be superflous. Also, the big companies now have their data organized, have their BI procedures well established, and trying to analyze it from a different standpoint might not be what they want. Another difference is: while in Java etc. development one codes and codes and codes, I don't know if this is the case for BI; in fact, from what I read on the net, a BI (or OLAP, ...etc) developer, in a big organization, is usually in a state of standby, and does in fact little coding. Any opinions, and in particular strong opinions, will be appreciated.

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  • Ubuntu...I love you, I hate you

    - by gregarobinson
     I have been working on seeing if a .NET 3.5 application will port over to Linux, Ubuntu to be specific. I started with version 9.01, then 9.10 and now 10.04 as I find more and more that I need from Mono. I have a dual boot on a dev box, Windows 7 and Ubuntu. An upgrade from Ubuntu 9.01 to 9.10 caused my mouse and keyboard to lock up. I was able to boot from a 9.10 cd. Then, I upgraded to 10.04 as I needed Mono 2,2. Upgrade worked, lost my windows boot though. it seems grub somehow jumped in and messed up the windows boot. After Googlign liek crazy and trying this and that, these 2 links finally got me my windows boot back:http://sourceforge.net/apps/mediawiki/bootinfoscript/index.php?title=Boot_Problems:Boot_Sector http://support.microsoft.com/kb/927392So, I am now thinking about trying SuSe instead as I hear\read it's more stable. I think a lot of my pains have been related to learning and getting use to Linux.        

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