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• ADF Mobile Released!!

  - by Denis T

  ADFmfAnnounce We are pleased to announce the general availability of the newest version of Oracle’s ADF Mobile framework. This new framework provides the much anticipated on-device capabilities that the latest mobile applications require.  Feature Highlights Java - Oracle brings a Java VM embedded with each application so you can develop all your business logic in the platform neutral language you know and love! (Yes, even iOS!) JDBC - Since we give you Java, we also provide JDBC along with a SQLite driver and engine that also supports encryption out of the box. Multi-Platform - Truly develop your application only once and deploy to multiple platforms. iOS and Android platforms are supported for both phone and tablet. Flexible - You can decide how to implement the UI: (a) Use existing server-based UI framework like JSF. (b) Use your own favorite HTML5 framework like JQuery. (c) Use our declarative HTML5 component set provided with the framework. ADF Mobile XML or AMX for short, provides all the normal input and layout controls you expect and we also add charts/maps/gauges along with it to provide a very comprehensive UI controls. You can also mix and match any of the three for ultimate flexibility! Device Feature Access - You can get access to device features from either Java or JavaScript to invoke features like camera, GPS, email, SMS, contacts, etc. Secure - ADF Mobile provides integrated security that works with your server back-end as well. Whether you’re using remote URLs, local HTML or AMX, you can secure any/all of your features with a single consistent login page. Since we also give you SQLite encryption, we are assured that your data is safe. Rapid - Using the same development techniques that ADF developers are already used to, you can quickly create mobile applications without ever learning another language! Architecture ADF Mobile is a “hybrid” architecture that employs a natively built “container” on each platform that hosts a number of browser windows that are used to display the application content. We add the Java VM as a natively built library to the container for business logic.   How To Get Started ADF Mobile is an extension to the recently released JDeveloper version 11.1.2.3.0. Simple get the latest JDeveloper from Oracle Technology Network and use the Check for Updates feature to get the ADF Mobile extension. Note: ADF Mobile does not require developers to learn any other languages or frameworks but to build/deploy to iOS, you must be on an Apple MacintoshTM and have Xcode installed. To build/deploy to Android™ you must have the Android SDK installed.

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• Lazy Processing of Streams

  - by Giorgio

  I have the following problem scenario: I have a text file and I have to read it and split it into lines. Some lines might need to be dropped (according to criteria that are not fixed). The lines that are not dropped must be parsed into some predefined records. Records that are not valid must be dropped. Duplicate records may exist and, in such a case, they are consecutive. If duplicate / multiple records exist, only one item should be kept. The remaining records should be grouped according to the value contained in one field; all records belonging to the same group appear one after another (e.g. AAAABBBBCCDEEEFF and so on). The records of each group should be numbered (1, 2, 3, 4, ...). For each group the numbering starts from 1. The records must then be saved somewhere / consumed in the same order as they were produced. I have to implement this in Java or C++. My first idea was to define functions / methods like: One method to get all the lines from the file. One method to filter out the unwanted lines. One method to parse the filtered lines into valid records. One method to remove duplicate records. One method to group records and number them. The problem is that the data I am going to read can be too big and might not fit into main memory: so I cannot just construct all these lists and apply my functions one after the other. On the other hand, I think I do not need to fit all the data in main memory at once because once a record has been consumed all its underlying data (basically the lines of text between the previous record and the current record, and the record itself) can be disposed of. With the little knowledge I have of Haskell I have immediately thought about some kind of lazy evaluation, in which instead of applying functions to lists that have been completely computed, I have different streams of data that are built on top of each other and, at each moment, only the needed portion of each stream is materialized in main memory. But I have to implement this in Java or C++. So my question is which design pattern or other technique can allow me to implement this lazy processing of streams in one of these languages.

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• A better way to organize your Silverlight Code Snippets.

  - by mbcrump

  I hate re-writing code. I also hate it when I find a great code snippet on the web and forget to bookmark it or it gets lost in my endless sea of bookmarks. So what do you do to get around this? This is the question that I was asking myself at the end of 2010. How can I get my Silverlight code organized? My requirements for a snippet manager were: Needs to be FREE. An easy way to view XAML/C# code behind together in one “view”. I wanted the ability to store the code snippets in cloud in case my HDD dies. Searchable Keywords to quickly find code snippets. I started looking for a snippet manager that would allow me to do just that and finally found Snippet Manager. Before going any further, I think that one of the most important things to note here is that this software supports 37 languages. It’s not just for Silverlight developers nor C# only guys. The software supports Java, SQL and even COBOL.   Below is a screenshot of the Snippet Manager that shows my Silverlight code snippet. You will notice that I have highlighted two sections. The top part is my XAML and the bottom is my C# code behind. I’ve included a sample below of my code snippets so that you can get an idea of how I organized it. Another thing that’s great about this software is that it supports plain text. I added some connection strings in the TEXT section below.  Once you have finished adding your code snippets, you can store them in the cloud. I created a FTP directory called “snippets” on my FTP Server and hit the upload button once I am finished adding my new codes snippets. This will allow me to use the code snippets on another computer with this application on my USB Key. See screenshots below: Enter your FTP credentials below: Hit the Uploads button on the Toolbar: Login in to your FTP Server and verify the following files are now on the FTP Server: Another great feature of the Snippet Manager is that you can also integrate this into VS2010 by clicking Tools –> External Tools: And setting up your External Screen to point to the Executable: You can now launch it by going to Tools –> Snippet Manager. If you want you could also a shortcut to launch the program with HotKeys. As you can see, this is a nice little program that includes everything needed to organize your code snippets very clean. I didn’t go over every feature but this is something that you might want to download and give it a shot.  Subscribe to my feed CodeProject

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• Why C++ people loves multithreading when it comes to performances?

  - by user1849534

  I have a question, it's about why programmers seems to love concurrency and multi-threaded programs in general. I'm considering 2 main approach here: an async approach basically based on signals, or just an async approach as called by many papers and languages like the new C# 5.0 for example, and a "companion thread" that maanges the policy of your pipeline a concurrent approach or multi-threading approach I will just say that I'm thinking about the hardware here and the worst case scenario, and I have tested this 2 paradigms myself, the async paradigm is a winner at the point that I don't get why people 90% of the time talk about concurrency when they wont to speed up things or make a good use of their resources. I have tested multi-threaded programs and async program on an old machine with an Intel quad-core that doesn't offer a memory controller inside the CPU, the memory is managed entirely by the motherboard, well in this case performances are horrible with a multi-threaded application, even a relatively low number of threads like 3-4-5 can be a problem, the application is unresponsive and is just slow and unpleasant. A good async approach is, on the other hand, probably not faster but it's not worst either, my application just waits for the result and doesn't hangs, it's responsive and there is a much better scaling going on. I have also discovered that a context change in the threading world it's not that cheap in real world scenario, it's infact quite expensive especially when you have more than 2 threads that need to cycle and swap among each other to be computed. On modern CPUs the situation it's not really that different, the memory controller it's integrated but my point is that an x86 CPUs is basically a serial machine and the memory controller works the same way as with the old machine with an external memory controller on the motherboard. The context switch is still a relevant cost in my application and the fact that the memory controller it's integrated or that the newer CPU have more than 2 core it's not bargain for me. For what i have experienced the concurrent approach is good in theory but not that good in practice, with the memory model imposed by the hardware, it's hard to make a good use of this paradigm, also it introduces a lot of issues ranging from the use of my data structures to the join of multiple threads. Also both paradigms do not offer any security abut when the task or the job will be done in a certain point in time, making them really similar from a functional point of view. According to the X86 memory model, why the majority of people suggest to use concurrency with C++ and not just an async aproach ? Also why not considering the worst case scenario of a computer where the context switch is probably more expensive than the computation itself ?

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• Why can't Java/C# implement RAII?

  - by mike30

  Question: Why can't Java/C# implement RAII? Clarification: I am aware the garbage collector is not deterministic. So with the current language features it is not possible for an object's Dispose() method to be called automatically on scope exit. But could such a deterministic feature be added? My understanding: I feel an implementation of RAII must satisfy two requirements: 1. The lifetime of a resource must be bound to a scope. 2. Implicit. The freeing of the resource must happen without an explicit statement by the programmer. Analogous to a garbage collector freeing memory without an explicit statement. The "implicitness" only needs to occur at point of use of the class. The class library creator must of course explicitly implement a destructor or Dispose() method. Java/C# satisfy point 1. In C# a resource implementing IDisposable can be bound to a "using" scope: void test() { using(Resource r = new Resource()) { r.foo(); }//resource released on scope exit } This does not satisfy point 2. The programmer must explicitly tie the object to a special "using" scope. Programmers can (and do) forget to explicitly tie the resource to a scope, creating a leak. In fact the "using" blocks are converted to try-finally-dispose() code by the compiler. It has the same explicit nature of the try-finally-dispose() pattern. Without an implicit release, the hook to a scope is syntactic sugar. void test() { //Programmer forgot (or was not aware of the need) to explicitly //bind Resource to a scope. Resource r = new Resource(); r.foo(); }//resource leaked!!! I think it is worth creating a language feature in Java/C# allowing special objects that are hooked to the stack via a smart-pointer. The feature would allow you to flag a class as scope-bound, so that it always is created with a hook to the stack. There could be a options for different for different types of smart pointers. class Resource - ScopeBound { /* class details */ void Dispose() { //free resource } } void test() { //class Resource was flagged as ScopeBound so the tie to the stack is implicit. Resource r = new Resource(); //r is a smart-pointer r.foo(); }//resource released on scope exit. I think implicitness is "worth it". Just as the implicitness of garbage collection is "worth it". Explicit using blocks are refreshing on the eyes, but offer no semantic advantage over try-finally-dispose(). Is it impractical to implement such a feature into the Java/C# languages? Could it be introduced without breaking old code?

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• What's a good way to get an IT internship? [closed]

  - by user1419715

  I'm a second year CS student who's worked really hard to build and expand my skills. I've spent the past week now trying to find a place to volunteer (i.e. work for FREE) so I can get a little bit of in-the-door experience with web development. I have a portfolio with several decent projects, a handful of languages and other hard/soft skills that employers constantly say they're clamoring for. I can't even get people to take my calls. This is me offering to work for them for FREE, remember. I'm in a reputable program at a respected school, get decent grades and...yeah, I've worked really hard to be presentable. On the rare occassions I actually get to speak to somebody at a design firm they hedge and do everything they can to get me off the phone. Nobody's ever expressed even the slightest interest in taking me on. The answer to the experience problem is supposed to be "you need to spend a year or two building up a big portfolio of projects on your own" so that employers will be impressed. I've done that. Websites, standalone apps, etc.. Nobody will even look at my resume, though. Question: Why does there seem to be so little interest in taking on upaid interns in the world of IT? Update: Sorry you all think I'm too aggressive or angry. It wasn't my intent to be a jerk to people while asking them for their opinions. That said, how would you feel if employer after employer turned you down cold when you offered yourself to them without asking for remuneration? One can't even get an unpaid job in this economy now, it seems. How am I going about my search? I find web firms in my area and contact them via email with a brief sales pitch of myself and a resume attached. Then a couple of days later I follow up with a phone contact. Nobody--anywhere--is advertising for interns of any kind. If there were I'm sure there'd be about 500 resumes per position, even unpaid. I've had good experiences in the past with cold-calling firms for actual paid jobs in other industries (hiring is a pain in the ass process and a call like this can show initiative while reducing a busy employer's need to do all the hiring overhead work), so I thought volunteering would work at least as well. My skills are pretty good for a CS student and include the usual suspects: HTML/CSS/Javascript, Python, Java, C, C#/.Net etc etc. I made a point on my resume to tie each ability claim to a project as well. Oh, and regarding the "working for free still costs the employer money" argument: that's an excellent point I hadn't though of. But it means...what? I have to pay the employer for the privilege of working there now?

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• Development Approach: User Interface In or Domain Model Out?

  - by Berin Loritsch

  While I've never delivered anything using Smalltalk, my brief time playing with it has definitely left its mark. The only way to describe the experience is MVC the way it was meant to be. Essentially, all the heavy lifting for your application is done in the business objects (or domain model if you are so inclined). The standard controls are bound to the business objects in some way. For example, a text box is mapped to an object's field (the field itself is an object so it's easy to do). A button would mapped to a method. This is all done with a very simple and natural API. We don't have to think about binding objects, etc. It just works. Yet, in many newer languages and APIs you are forced to think from the outside in. First with C++ and MFC, and now with C# and WPF, Microsoft has gotten it's developer world hooked on GUI builders where you build your application by implementing event handlers. Java Swing development isn't so different, only you are writing the code to instantiate the controls on the form yourself. For some projects, there may never even be a domain model--just event handlers. I've been in and around this model for most of my carreer. Each way forces you to think differently. With the Smalltalk approach, your domain is smart while your GUI is dumb. With the default VisualStudio approach, your GUI is smart while your domain model (if it exists) is rather anemic. Many developers that I work with see value in the Smalltalk approach, and try to shoehorn that approach into the VisualStudio environment. WPF has some dynamic binding features that makes it possible; but there are limitations. Inevitably some code that belongs in the domain model ends up in the GUI classes. So, which way do you design/develop your code? Why? GUI first. User interaction is paramount. Domain first. I need to make sure the system is correct before we put a UI on it. There's pros and cons for either approach. Domain model fits in there with crystal cathedrals and pie in the sky. GUI fits in there with quick and dirty (sometimes really dirty). And for an added bonus: How do you make sure the code is maintainable?

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• Getting my younger brother started on programming

  - by SmartLemon

  My younger brother is 13 years old, I started programming when I started to develop Android applications when I was 15, last year my brother gained an interest in it and he would always pestering me about letting him make something himself, so I wrote him a few tutorials and he built himself a small application that had a few buttons that did something, I think you put in your dob and it would tell you what day you were born on, he took a couple of days building up to his final application, maybe even a week, learning everything he needed. Since then he hasn't really done much more because I have been engulfed in work and such where I have my own programming problems to sort out. I told him that when he was my age (I am 17) that he should be better then me, he was a bit sceptical about this however. I dont think he has as much logical reasoning as I would think he needs to solve more complex problems, but shouldnt that just develop over time as it did with me? He has been pestering me for the past week or something to write him more tutorials, but I didn't have time. All I had with me was a playlist I had downloaded from the new boston from youtube for C++, it's about 73 videos. He is currently about 20-30 videos in, he has come to ask me a few questions about it and thats it. Should I have really properly started him with C++? Should I stop him now and start him again on python or ruby? I know that C++ shouldn't really be a beginners language, especially for someone who is only 13, by the time this question is answered will probably be up to learning about inheritance or something. Some people may see this as not a real question, but it is, and should be used as a reference for others. I want to know, should I start him on a different language whch is more easy? What language then? And would it be better for me to teach him myself (I would make time) or just continue him with the new boston? There are a few more questions throughout this question but these are the main ones. Part of the question people seem to be neglecting is me asking whether I should change what language he is learning to another, or since he is already pretty far through the tutorials should I just leave him with C++ and he can learn the other languages freely by himself?

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• Recommended learning path?

  - by stairmast0r

  First, my current standing: I know C++ at an.. advanced beginner level? I've gone through a book, I know the syntax well enough, I know a fair amount of standard library functions, and I've programmed some simple console stuff with it. I'd probably be able to program more with it if I knew how to structure a program, but I just can't seem to wrap my head around the whole concept of structuring something remotely complex. I've messed around with Java for a day or two, and the syntax was extremely easy to get the hang of, except that I didn't really know any functions. I'm plenty willing to learn, and to work hard to do so, but I don't really know where to go from here. Now, at the risk of sounding cliche, what I'd like to become is someone like the great three of id; Carmack, Romero, and Abrash. To be considered a genius. I believe anything can be learned, and nothing mentally limits anyone except lack of desire to learn. But I don't know how to learn this. They learned by doing, and making do with what resources they had. On the other hand, I have access to almost any books I want, access to the internet, and access to a more than capable computer and software. Should I learn more languages? Assembly? LISP? BASIC? Haskell? Should I dive straight into advanced topics like OpenGL? Or should I wait until I feel I've come closer to mastering the simpler things, like console programs, first? Should I follow tutorials? Should I follow books? Should I just dive into writing something and follow a reference manual as I go? What order should I do all this in? How should I do it? I want to completely master this; to be considered a genius. The most perfect career I can imagine is to start the next id. I have the drive to do it, I just don't know where to begin...

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• Trying to find resources to learn how to test software [closed]

  - by Davek804

  First off, yes this is a general question, and I'd be perfectly happy to move this to another portion of SE, but I didn't see a more fitting sub. Basically, I am hoping a more experienced QA tester can come along and really fill in some basics for me. So far, websites seem to be sparse in terms of explaining languages involved, basic practices, etc. So, I'm sorry in advance if this is too general, but towards the end of this post I ask some specific questions if it's just absolutely unacceptable to speak in general terms. I just landed a position as Junior Systems and QA Engineer with a social media startup. Their QA and testing is almost nonexistent, so if I do a good job, I imagine I'll find a lot of bugs and have a secure role in the business. I'm pretty good with the systems aspect of my role, but I need to learn more about the QA and testing aspects. We run hardware that's touchscreen based - the user can use and interact with the devices. So, in terms of my QA role, in the short term, I need to build scripts to test the hardware/software as a 'user' to try to uncover bugs. First off, what language should these scripts be written in? Does anyone have some examples? What about the longer term 'automated testing'? I'm familiar with regression testing as the developer adds in new features, sure, but the 50,000 other types of testing, not so much. Most of our hardware runs dotnet/C# code, with some of the servers running Java - but I don't expect to need to run tests on the Java side at this point. I hope to meet with one developer today and try to get a good idea of the output from the hardware so that I can 'mock' this data that gets sent to servers, to try to bugtest. Eventually, we will be moving the hardware to be closer to where I live and work, so that I can test virtually and on real hardware. So a lot of the bugs we're dealing with now are like this: the Local Server, which kiosks report their data to gets updated from the kiosks, but the remote server does not. Or, vis versa when the user registers on a kiosk, the remote server updates but the local server does not. But yeah, without much more detail, I imagine a lot of this info isn't helpful. I've bought a book "How Google Tests Software", but it's really a book more about 'how their software testing is different from Microsoft'. It doesn't teach how to test so much as why their methods are better. Does anyone have a good book that I can buy? An ebook maybe? My local Barnes and Noble kinda had a terrible selection. I also figure a book from 2005 is not necessarily that good either.

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• Nashorn ?? JDBC ? Oracle DB ?????

  - by Homma

  ???? ????????????Nashorn ?? JavaScript ??????? JDBC ? API ??????Oracle DB ?????????????????????? ?????????????????????JDBC ? API ??????????????? ????????? URL ? https://blogs.oracle.com/nashorn_ja/entry/nashorn_jdbc_1 ??? ???? ???? DB ????Oracle Linux 6.5 ?? Oracle 11.2.0.3.0 ?????????????? JDBC ????????????? DB ????????????????? ???? ?Oracle Database JDBC ???????????????????????Nashorn ?? JavaScript ?????????????????????? JDBC ? Oracle DB ??????? Nashorn ?? JavaScript ??????? JDBC ? Oracle DB ?????? JavaScript ?????? DB ???????????????? JavaScript ?????? oracle ????????? JavaScript ?????? DB ?????????????????????????????????DB ???????????? JavaScript ???????????????????????? oracle ?????????? JDBC ??????????????????????? ???? DB ?????? ?????? DB ???????????? SQL> create user test identified by "test"; SQL> grant connect, resource to test; Java 8 ??????? ???? JDK 8 ?????????????????????????????? 8u5 ???? Java 8 ??????? ???????? JDK ? yum ??????????????? # yum install ./jdk-8u5-linux-x64.rpm JDK ????????????????????? # java -version java version "1.8.0_05" Java(TM) SE Runtime Environment (build 1.8.0_05-b13) Java HotSpot(TM) 64-Bit Server VM (build 25.5-b02, mixed mode) Nashorn ????? oracle ??????????PATH ??????? $ vi ~/.bash_profile PATH=${PATH}:/usr/java/latest/bin export PATH $ . ~/.bash_profile jjs ?????????????????? $ jjs -fv nashorn full version 1.8.0_05-b13 ????????????? JDBC ?????????????? JDBC ?????????JDBC ?????? ??????????????????? ???????? JDBC ????????????????????????? ?????????????? JavaScript ??????????jjs ???????????????????? Nashorn ? JavaScript ?????????????????? JDBC ??????? jjs ????? -cp ?????? JDBC ????? JAR ??????????? $ vi version.js var OracleDataSource = Java.type("oracle.jdbc.pool.OracleDataSource"); var ods = new OracleDataSource(); ods.setURL("jdbc:oracle:thin:test/test@localhost:1521:orcl"); var conn = ods.getConnection(); var meta = conn.getMetaData(); print("JDBC driver version is " + meta.getDriverVersion()); $ jjs -cp ${ORACLE_HOME}/jdbc/lib/ojdbc6.jar version.js JDBC driver version is 11.2.0.3.0 ??????JavaScript ???????? JDBC ?????????? (11.2.0.3.0) ????????? Java.type() ??????? JavaClass ??????? new ????? Java ??????????????????????????? Java ???????????????????? ????????????????????????????????????????????????????? ?????????????????????????????????????? Java ??????????????? JavaScript ???????????????????????????????? ?????? ???????????????? jjs ???????????Nashorn ??????????????jjs ??????????????????????????? $ jjs -cp ${ORACLE_HOME}/jdbc/lib/ojdbc6.jar jjs> var OracleDataSource = Java.type("oracle.jdbc.pool.OracleDataSource"); jjs> var ods = new OracleDataSource(); jjs> ods.setURL("jdbc:oracle:thin:test/test@localhost:1521:orcl"); null jjs> var conn = ods.getConnection(); jjs> var meta = conn.getMetaData(); jjs> print("JDBC driver version is " + meta.getDriverVersion()); JDBC driver version is 11.2.0.3.0 ???????? JDBC ?????????? (11.2.0.3.0) ????????? ?????????????????????????????????????????????????????????JDBC ?????????????????????? ??? Nashorn ???????? JDBC ? API ????????????? API ???????????????? ???????? JavaScript ?????????????????????????????????? ???????????? JDBC ? DB ???????????????? JDBC ??????????????????????????? ???? Oracle Database JDBC?????? 11g????2(11.2) ??????? jjs ?????????? Nashorn User's Guide Java Scripting Programmer's Guide Oracle Nashorn: A Next-Generation JavaScript Engine for the JVM

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• Centos CMake Does Not Install Using gcc 4.7.2

  - by Devin Dixon

  A similar problem has been reported here with no solution:https://www.centos.org/modules/newbb/print.php?form=1&topic_id=42696&forum=56&order=ASC&start=0 I've added and upgraded gcc to centos cd /etc/yum.repos.d wget http://people.centos.org/tru/devtools-1.1/devtools-1.1.repo yum --enablerepo=testing-1.1-devtools-6 install devtoolset-1.1-gcc devtoolset-1.1-gcc-c++ scl enable devtoolset-1.1 bash The result is this for my gcc [root@hhvm-build-centos cmake-2.8.11.1]# gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/opt/centos/devtoolset-1.1/root/usr/libexec/gcc/x86_64-redhat-linux/4.7.2/lto-wrapper Target: x86_64-redhat-linux Configured with: ../configure --prefix=/opt/centos/devtoolset-1.1/root/usr --mandir=/opt/centos/devtoolset-1.1/root/usr/share/man --infodir=/opt/centos/devtoolset-1.1/root/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-bootstrap --enable-shared --enable-threads=posix --enable-checking=release --disable-build-with-cxx --disable-build-poststage1-with-cxx --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-linker-build-id --enable-languages=c,c++,fortran,lto --enable-plugin --with-linker-hash-style=gnu --enable-initfini-array --disable-libgcj --with-ppl --with-cloog --with-mpc=/home/centos/rpm/BUILD/gcc-4.7.2-20121015/obj-x86_64-redhat-linux/mpc-install --with-tune=generic --with-arch_32=i686 --build=x86_64-redhat-linux Thread model: posix gcc version 4.7.2 20121015 (Red Hat 4.7.2-5) (GCC) And I tried to then install cmake through http://www.cmake.org/cmake/resources/software.html#latest But I keep running into this error: Linking CXX executable ../bin/ccmake /opt/centos/devtoolset-1.1/root/usr/libexec/gcc/x86_64-redhat-linux/4.7.2/ld: CMakeFiles/ccmake.dir/CursesDialog/cmCursesMainForm.cxx.o: undefined reference to symbol 'keypad' /opt/centos/devtoolset-1.1/root/usr/libexec/gcc/x86_64-redhat-linux/4.7.2/ld: note: 'keypad' is defined in DSO /lib64/libtinfo.so.5 so try adding it to the linker command line /lib64/libtinfo.so.5: could not read symbols: Invalid operation collect2: error: ld returned 1 exit status gmake[2]: *** [bin/ccmake] Error 1 gmake[1]: *** [Source/CMakeFiles/ccmake.dir/all] Error 2 gmake: *** [all] Error 2 The problem seems to come from the new gcc installed because it works with the default install. Is there a solution to this problem?

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• What kind of “sysadmin stuff” should I show to students during a talk?

  - by Gregory Eric Sanderaon

  A teacher asked me If I could talk about my job as a linux sysadmin in his class. The course is called "Introduction to Operating systems" and i've been given 45 minutes to talk. The students are beginning their second year, so they've had a bit of experience with programming in different languages. What i'm like to do is show a series of hands-on examples of the kinds of things I do on a regular basis. I've already got a few ideas jotted down, but I'm afraid that they might be either too advanced or too simple for the students to appreciate. Another concern is that a topic might be too long to explain and use too much time overall. Here are a few ideas : Program deployment using version control (git in my case) filtering apache logs using grep, awk, uniq, tail A couple of bash scripts that i've made for various stuff on servers live montitoring (htop, iotop, iptraf) creating databases and assigning roles in mysql/postgresql So, are these ideas any good ? Do you have better ideas ? are the ideas too simple and should I go for more "advanced" stuff ?

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• How can a Virtual PC with Win XP install the East Asian Language? (or does any browser come with Chi

  - by Jian Lin

  How can a Virtual PC with Win XP on it install the East Asian Language? (or does any browser come with Chinese fonts?) After setting up a virtual PC with Win XP, if Chinese font is needed, then the usual way is to go to the Control Panel, select "Regional and Language" and go to the second tab and check the box "Install Files for East Asian Languages". After clicking OK, it asks for the file cplexe.exe on the XP SP3 CD 3... and is said to be about 230MB... In such case, how can the language pack or fonts be installed? (Update: I found that it is true for Window 7's Virtual PC with XP on it, as well as the XP SP3 with IE 8 that can be downloaded in the link below.) (I downloaded the virtual hard drive file .vhd from http://www.microsoft.com/downloads/details.aspx?FamilyId=21EABB90-958F-4B64-B5F1-73D0A413C8EF&displaylang=en so there is no "CD 3"... there) Or does any browser come with all the unicode fonts without needing the OS to support it?

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• Generic RPM package for Python 2.x

  - by RaphDG

  I have a python application, it can run on Python = 2.6 and it's architecture independant. I need the rpm package of this application to be installed on Fedora 14 (python 2.7) and Centos 6.2 (python 2.6). I currently use mock to build one rpm package for each "flavour" and it works well. I apparently can't install the Centos compiled rpm on Fedora. It gives me this error message : error: Failed dependencies: python(abi) = 2.6 is needed by myapp-0.9.el6.noarch Here is the relevant part of my .spec file : %{!?python_sitelib: %global python_sitelib %(%{__python} -c "from distutils.sysconfig import get_python_lib; print(get_python_lib())")} %{!?python_sitearch: %global python_sitearch %(%{__python} -c "from distutils.sysconfig import get_python_lib; print(get_python_lib(1))")} Name: myapp Version: #VERSION# Release: #RELEASE#%{dist} Summary: myapp Group: Development/Languages License: Apache v2 Source0: %{name}-%{version}-#RELEASE#.tar.gz BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n) BuildArch: noarch BuildRequires: python-devel BuildRequires: python-setuptools %description myapp %prep %setup -c %build %{__python} setup.py build %install %{__rm} -rf %{buildroot} %{__python} setup.py install -O1 --skip-build --root %{buildroot} Do I really have to use mock and build 2 rpms or is there another way to create a single generic 2.x rpm package ?

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• Changing the interface language in Windows 7 Home Premium

  - by Cristián Romo

  A friend of mine has recently purchased a laptop in the U.S. that has Windows 7 Home Premium on it with an English interface. Not being a native English speaker, I'm trying to change the interface language to traditional Chinese. I've looked through the Control Panel in search of something that might let me change the interface language. Naturally, I looked at the Region and Language section and managed to change the formats the computer uses and install a working keyboard, but I haven't found a way to change the interface language. Upon doing some research, I found out that there are two kinds of interface packs, Multilingual User Interface (MUI) and Language Interface Packs (LIP). It seems that MUIs can only be installed through Windows Update, so I looked through the list of updates. To my dismay, the language packs are not present. The optional updates tab doesn't even show up. Many sites show a drop down menu the under Keyboards and Languages tab in the Region and Language options, yet it doesn't show up for me. We also don't have the Windows 7 DVD which might contain this useful file. As far as the LIPs go, I can't find one in Chinese at all, let alone traditional Chinese. Can the interface language be changed in Home Premium at all? If it can, how would I do so?

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• Can I disable chrome's auto translate function for visitors to a given page on my site?

  - by Drew Noakes

  I know how to disable this feature for pages that I visit, but what I'm looking for is a way to tell other user's Chrome browsers not to offer translation a particular page on my site. Is there some kind of meta tag I can use? Alternatively, can I indicate that a particular element on the page should not be translated? Reason: The controls which slide down from the top of the page cause my page to resize, which changes the content, which makes the control slide up, which resizes the page, which changes the content, which causes the controls to slide back in. Rinse and repeat. The page dances. The page itself is a map, and the content it wants to translate are all proper names and shouldn't be translated anyway. If alternate names exist in other languages, I provide them myself. Generally I'm against taking away features from the browser that users might like, but in this case it really makes sense. So please don't answer saying that I shouldn't be doing this. I've weighed up the options.

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• Does a Windows 7 dvd only have one language?

  - by user326639

  I'm a Dutch developer living in Spain. I recently composed a new computer from new parts and I installed Windows 7 Professional 64 bit (OEM) on it. On the web site of the on-line shop there was a note saying "language: Spanish". Because my English is quite a bit better than my Spanish, but mainly because it is much easier to find information on the web in English, I want my OS to be in English. I asked the on-line shop if they also sold the UK version of Windows 7 but they assured me that "all Windows 7 versions are multi-language". With the installation of XP a few years ago, I remember that I was offered the option English or Spanish while the installation process was still in the DOS-like (non-graphical) screen. While installing Windows 7, I did not see any non-graphical screen and the first time I was asked about the language, was in a drop-down list that contained only Spanish. I know about the language pack possibility of Windows 7, but this is not available on Professional. Even if I had Ultimate, I don't know if it would be possible to install Windows in Spanish, and then add English as a second language from a language pack. I get the impression that English has to be the base-language. Furthermore, I am a bit sceptical until I'd see it in action. What happens with shortcuts (i.e. Select All: ctrl-a in English / ctrl-e in Spanish, and what about logging messages in Event Viewer, etc) So can anybody tell me how it works with languages in Windows 7? Have I been misinformed by the computer shop? Could it be that OEM versions of Windows are single language an a full installation is not?

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• How to get german QWERTY on Windows?

  - by Arturas M

  Well I'm used to having the world standard keyboard which is qwerty and not qwertz... But on windows I can't find the choice for german input which would be qwerty, not qwertz. In linux there was german input with qwerty so it was fun. I believe it should be on Windows too? Cause i'm sick of this qwertz always having to correct and search for z or y... Yeah, I know, if Germans made a mistake, it wasn't loosing WW2... Edit: Maybe I wasn't clear enough, it's not about changing between different language inputs? It's about having all german keys in german input, just the z and y would be in the correct places like all the worlds keyboards use and like the US keyboard uses... Solution: Well unfortunately by searching everywhere and waiting for answers I couldn't find what I needed, so I came up with this solution - I used The The Microsoft Keyboard Layout Creator And created my own very custom layout by modifying the default german layout and switching places of z and y. In case somebody needs it and doesn't want to go the hard way, I decided to upload them, so here are the links to download and install the keyboard layout: http://www20.zippyshare.com/v/95071447/file.html http://rapidshare.com/files/3822150342/German%20QWERTY%202%20by%20Arturas%20M.zip It will appear as a choice under German input between languages in your language bar. If you just want to use this german layout, just remove all german layouts and install this one. Good luck and have fun using it!

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• Gvim on Windows 7: ALT codes not working

  - by John Sonderson

  I would like to be able to enter ALT codes in Gvim on Windows 7 as documented on the following site: Alt Codes On Windows (Windows 7 in my case), to generate a character via an ALT code you make sure that the NumLock key on your keypad is toggled on, hold down the ALT key, enter the keycode on the numeric keypad, and then release the ALT key. However this does not work in Gvim on Windows (which ignores the fact that I am pressing the ALT key and just prints to entered keypad key directly onto the screen). How can I get these keystroke combinations to work in Gvim as well? Thanks. EDIT: As the answer below points out, the way to insert non-ASCII characters for which you do not have entries on your keyboard without changing the keyboard layout is as follows: Make sure you are in insert mode, and then type CTRL-V followed by the Unicode character code of interest, for instance: CTRL-V u00E0 (generates à) CTRL-V u00C8 (generates È) CTRL-V u00E8 (generates è) CTRL-V u00E9 (generates é) CTRL-V u00EC (generates ì) CTRL-V u00F2 (generates ò) etc... See for instance http://unicode-table.com/ for a full list of Unicode character codes. The following list of Unicode characters by language may also be useful: http://en.wikipedia.org/wiki/List_of_Unicode_characters In some cases such as this one, though, there might be an easier way to enter special characters (see :help digraphs and :digraphs). For example, while in insert mode you may be able to type the following: CTRL-K E! (yields É) CTRL-K a' (yields á) Note that as the following page shows: http://code.google.com/p/vim/source/browse/runtime/doc/digraph.txt Gvim 7.4 contains an even wider set of default digraphs than Gvim 7.3, thus providing convenience to an even broader set of languages. Regards.

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• How do I register a service with Bonjour?

  - by Roman

  I am trying to start to use Bonjour. Here I found a manual how to register a service with Bonjour. The following is written there: The network services architecture in Bonjour includes an easy-to-use mechanism for publishing, discovering, and using IP-based services. Well let's see how to register a service. In the very beginning it is written: To publish a service, an application or device must register the service with a Multicast DNS responder But how?!?! First of all I do not know what is the Multicast DNS responder. Second, it is not written how do I do it. Where and what should I type? Should I use command line? Should I use some programming languages? What exactly should I type... Is there an easy way to start to use Bonjour? Well, it was emphasized several times how easy it should be to use it. But I cannot start to use it for several day. So, can anybody, pleas, help me with that?

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• iMac 20inch (Mid 2007) SL DVD Boot Prohibitory Sign

  - by Caitlann Lloyd

  iMac 20inch (Mid 2007 Build) with Ubuntu 12.0.4 How I got in this situation I had a perfectly healthy Intel iMac running Snow Leopard several months ago. Then I got the dreaded spinning gear and several kernel panics. After getting a little frustrated (failing to find a solution online), I found an old macbook installation disk and used it to access Disk Utility. From here, I erased my entire hard drive leaving me with no OS. I then created a Ubuntu DVD and installed Ubuntu onto the system. Now, on Ubuntu, I wine installed Transmac and burned a Single layer copy (with languages, etc. removed to save space) of Snow Leopard onto a 4.7GB DVD. I tried to boot from it and was met with first the grey apple screen and a spinning cog before the grey apple shortly turned into the infamous prohibitory sign. Note: I met this problem previously when using Disk Utility to create a bootable USB of Snow Leopard, hence I severely doubt it has anything to do with the DVD created. Resources at my disposal 1 x iMac running Ubuntu 6 x 4.7GB DVDs 1 x USB Stick 12GB 1 x Windows 7 Laptop Resources I do not have Firewire cables Access to a prebuilt retail disk (Misplaced) Access to another Mac Apple Warranty I would be hugely grateful if someone was able to tell me how to install Snow Leopard again.

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• Can I use multiple URLs in the URL field of KeePass?

  - by Sammy

  I am using KeePass version 2.19. What I would like to do is have more than just one URL address associated with a given user name and password. The entry for a given website might look something like this... Title google User Name email Password pass URL https://accounts.google.com/ServiceLogin?hl=en&continue=https://www.google.com/ https://accounts.google.com/ServiceLogin?hl=sv&continue=https://www.google.com/ https://accounts.google.com/ServiceLogin?hl=de&continue=https://www.google.com/ As you can see the ?hl=en changes into ?hl=sv and then to ?hl=de for the three different languages in which I wish to view the Google log-in page. But this of course could be something completely different, like different web services from the same provider like YouTube and Gmail by Google. Very much like SE where you have several websites but only use one user name and password. I imagine something along the lines of having multiple entries for one and the same website, where KeePass would actually prompt you to choose which one you want to use. So you have several user names and passwords that use the same URL. But is it possible to have several URLs using the same user name and password, so that KeePass asks me "to which of the following three URLs do you want to auto-log into with this password"?

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• Send keystrokes simultaneously to both host and slave over internet?

  - by donodarazao

  I would like to watch movies with a friend who lives far away from me. For this, the playback should be synchronized on both our pc. However, we have some constraints: Due to our low bandwidth internet, any form of streaming solution wouldn't work. We do however both have the same copy of the movie on our harddisks. We use movies to learn languages and because of this, we very frequently pause and rewind. The typical "3...2...1...go!" solution over skype wouldn't work because it would soon get out of sync. I imagine an approach that sends keystrokes simultaneously to both our pc would work (for example, if I press space to pause the movie at my pc, space should also be send to his pc). Any ideas how this could be realized? I looked into Synergy and InputDirector, but both neither seem to be an option, because I don't want to see the desktop of my friend, I want to see my desktop Keystrokes should be sent simultaneously to both pc, not just to one pc We have both Windows 7x64, and we might use any media player (VLC, XBMC,...).

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• How do you make Google's interface always be in your chosen language?

  - by Michael Wolf

  Google's interface and search results don't always appear in my preferred language, English. I'm located in Mexico City and, although I generally have no problem with Spanish, I would prefer search results in English most of the time. (The exception is when I'm using search terms in Spanish.) I'd also prefer the interface to be in English, but that's far less important to me than search results. Google looks at your IP to decide where you're coming from and thus what language to present results in. So, when I type www.google.com into the URL bar, it redirects me to www.google.com.mx. Is there a way to force Google to use one language all the time? Here are some things I've done and tried: 0) I have a Google account, and I've configured it such that it should know that English is my preferred language. I don't often explicitly log out of Google, so generally Google knows I'm me and my preferences when I access its services. 1) I've configured my browser to ask for pages in English. Very few sites support this feature at all; Google isn't one of them. 2) From www.google.com.mx, I can click on "Google.com in English". This works until, I think, I close the browser. 2a) From www.google.com.mx, I can go into account configuration, which is English. From then on, everything's in English. 3) I can append &hl=en (Human Language = English) to the end of the URLs of result pages. 2, 2a, and 3 all "work", but they're all mildly annoying. I'd rather avoid them if I could. (At the risk of stating the obvious, English and Spanish are the languages I'm dealing with, but I imagine that, say, a francophone using Google from Korea would run into basically the same issue.)

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