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• Oracle Solaris Studio Express 6/10 and its Customer Feedback Program are now available

  - by pieter.humphrey

  Oracle Solaris Studio Express 6/10 and the Customer Feedback Program for it are now available. Oracle Solaris Studio Express 6/10 is available on Solaris 10 (SPARC, x86), OEL 5 (x86), RHEL 5 (x86), SuSE 11 (x86) today and will be available for OpenSolaris in the near future. New feature highlights since the last release include: C/C++/Fortran compiler optimizations for the latest UltraSPARC and SPARC64-based architectures such as UltraSPARC T2 and SPARC64 VII C/C++/Fortran compiler optimizations for the latest x86 architectures including the Intel Xeon 7500 processor series (Nehalem-EX) and the Intel Xeon 5600 processor series (Westmere-EP) Enhanced debugging and code coverage tooling Improved application profiling with the Performance Analyzer Updated IDE based on NetBeans 6.8 To find more information and download go to http://developers.sun.com/sunstudio/downloads/express/ To participate in the customer feedback program for Oracle Solaris Studio Express 6/10 go to http://developers.sun.com/sunstudio/customerfeedback/index.jsp Please get the word out, try out this new release and send us your feedback! Technorati Tags: developer,development,solaris,sparc,Oracle Solaris Studio,Solaris Studio,Sun Studio,oracle,otn del.icio.us Tags: developer,development,solaris,sparc,Oracle Solaris Studio,Solaris Studio,Sun Studio,oracle,otn

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• How did programmers resolve their problems before the internet?

  - by 9a3eedi

  When programming, anytime I get stuck, perhaps with a compiler error that doesn't make sense, or from a GUI function that didn't do what I expected, I automatically google my problem, find someone else that faced the same thing, and read what's going on and why I'm getting the problem. Before the internet, how did people handle these situations? People used to read books and manuals more, I know. But books don't explain everything, like the odd compiler problem that you get sometimes, or nothing showing up on your screen despite you clearly writing correct OpenGL code. How did people cope when facing challenges? Did they simply "bash their head" on the wall till they figured it out? Is there something people used to do regularly on the side that gave them the ability to get themselves unstuck more easily? Were libraries/compilers much simpler back then? I've been asking this question because I sometimes feel guilty depending on Google so much when I'm pretty sure programmers before my time were more independent when it comes to facing these matters.

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• Developing for 2005 using VS2008!

  - by Vincent Grondin

  I joined a fairly large project recently and it has a particularity… Once finished, everything has to be sent to the client under VS2005 using VB.Net and can target either framework 2.0 or 3.0… A long time ago, the decision to use VS2008 and to target framework 3.0 was taken but people knew they would need to establish a few rules to ensure that each dev would use VS2008 as if it was VS2005… Why is that so? Well simply because the compiler in VS2005 is different from the compiler inside VS2008…  I thought it might be a good idea to note the things that you cannot use in VS2008 if you plan on going back to VS2005. Who knows, this might save someone the headache of going over all their code to fix errors… -        Do not use LinQ keywords (from, in, select, orderby…).   -        Do not use LinQ standard operators under the form of extension methods.   -        Do not use type inference (in VB.Net you can switch it OFF in each project properties). o   This means you cannot use XML Literals.   -        Do not use nullable types under the following declarative form:    Dim myInt as Integer? But using:   Dim myInt as Nullable(Of Integer)     is perfectly fine.   -        Do not test nullable types with     Is Nothing    use    myInt.HasValue     instead.   -        Do not use Lambda expressions (there is no Lambda statements in VB9) so you cannot use the keyword “Function”.   -        Pay attention not to use relaxed delegates because this one is easy to miss in VS2008   -        Do not use Object Initializers   -        Do not use the “ternary If operator” … not the IIf method but this one     If(confition, truepart, falsepart).   As a side note, I talked about not using LinQ keyword nor the extension methods but, this doesn’t mean not to use LinQ in this scenario. LinQ is perfectly accessible from inside VS2005. All you need to do is reference System.Core, use namespace System.Linq and use class “Enumerable” as a helper class… This is one of the many classes containing various methods that VS2008 sees as extensions. The trick is you can use them too! Simply remember that the first parameter of the method is the object you want to query on and then pass in the other parameters needed… That’s pretty much all I see but I could have missed a few… If you know other things that are specific to the VS2008 compiler and which do not work under VS2005, feel free to leave a comment and I’ll modify my list accordingly (and notify our team here…) ! Happy coding all!

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• NEON Intrinsic Support in CE7

  - by Kate Moss' Open Space

  Just a side note for people who may be interested in creating high performance code to take advantage on NEON instruction set but wish to use NEON intrinsic instaed of coding assembly. Compiler won't generate NEON opcode unless application use the NEON intrinsic explicitly. Basically, you need ARMv7 build enviroment, so compiler can emit NEON opcode. Intrinsic prototype can be found in public\COMMON\sdk\inc\arm_neon.h and that is all you got. If you ever find an NEON opcode does not have corresponding intrinsic, you still need to use the old trick - write that part of code in assembly.

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• Why is there a lack of Backports of Optional 10.10 or later Packages in repos?

  - by EvilPhoenix

  This question is about backports again, but is specific to the difference in availability of packages. A specific example of this would be the two gcc packages in 10.10's repos: gcc (which is 4.4), and gcc-4.5 (which is gcc 4.5). While this change is in 10.10's repositories, such optional packages aren't included in the 10.04 LTS repositories, and the option to have a gcc-4.5 compiler in 10.04 might help several people (such as myself, who needs the 4.5 compiler for University, and I can't upgrade to 10.10 because it doesnt operate correctly on my system). Is there a reason a lack of such optional packages is in the 10.04 repositories?

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• How do you handle increasingly long compile times when working with templates?

  - by Ghita

  I use Visual Studio 2012 and he have cases where we added templates parameters to a class "just" in order to introduce a "seam point" so that in unit-test we can replace those parts with mock objects. How do you usually introduce seam points in C++: using interfaces and/or mixing based on some criteria with implicit interfaces by using templates parameters also ? One reason to ask this is also because when compiling sometimes a single C++ file (that includes templates files, that could also include other templates) results in an object file being generated that takes in the order of around 5-10 seconds on a developer machine. VS compiler is also not particularly fast on compiling templates as far as I understand, and because of the templates inclusion model (you practically include the definition of the template in every file that uses it indirectly and possibly re-instantiate that template every time you modify something that has nothing to do with that template) you could have problems with compile times (when doing incremental compiling). What are your ways of handling incremental(and not only) compile time when working with templates (besides a better/faster compiler :-)).

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• How to install SpatiaLite 3 on 12.04

  - by Terra

  1) sudo apt-get install libsqlite3-dev libgeos-dev 2) libspatialite-3.0.0-stable$ ./configure Result: configure: error: cannot find proj_api.h, bailing out checking for a BSD-compatible install... /usr/bin/install -c checking whether build environment is sane... yes checking for a thread-safe mkdir -p... /bin/mkdir -p checking for gawk... no checking for mawk... mawk checking whether make sets $(MAKE)... yes checking whether to enable maintainer-specific portions of Makefiles... no checking for style of include used by make... GNU checking for gcc... gcc checking whether the C compiler works... yes checking for C compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... no checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether gcc accepts -g... yes checking for gcc option to accept ISO C89... none needed checking dependency style of gcc... gcc3 checking how to run the C preprocessor... gcc -E checking for grep that handles long lines and -e... /bin/grep checking for egrep... /bin/grep -E checking for ANSI C header files... yes checking for sys/types.h... yes checking for sys/stat.h... yes checking for stdlib.h... yes checking for string.h... yes checking for memory.h... yes checking for strings.h... yes checking for inttypes.h... yes checking for stdint.h... yes checking for unistd.h... yes checking for stdlib.h... (cached) yes checking stdio.h usability... yes checking stdio.h presence... yes checking for stdio.h... yes checking for string.h... (cached) yes checking for memory.h... (cached) yes checking math.h usability... yes checking math.h presence... yes checking for math.h... yes checking float.h usability... yes checking float.h presence... yes checking for float.h... yes checking fcntl.h usability... yes checking fcntl.h presence... yes checking for fcntl.h... yes checking for inttypes.h... (cached) yes checking stddef.h usability... yes checking stddef.h presence... yes checking for stddef.h... yes checking for stdint.h... (cached) yes checking sys/time.h usability... yes checking sys/time.h presence... yes checking for sys/time.h... yes checking for unistd.h... (cached) yes checking sqlite3.h usability... yes checking sqlite3.h presence... yes checking for sqlite3.h... yes checking sqlite3ext.h usability... yes checking sqlite3ext.h presence... yes checking for sqlite3ext.h... yes checking for g++... no checking for c++... no checking for gpp... no checking for aCC... no checking for CC... no checking for cxx... no checking for cc++... no checking for cl.exe... no checking for FCC... no checking for KCC... no checking for RCC... no checking for xlC_r... no checking for xlC... no checking whether we are using the GNU C++ compiler... no checking whether g++ accepts -g... no checking dependency style of g++... none checking for gcc... (cached) gcc checking whether we are using the GNU C compiler... (cached) yes checking whether gcc accepts -g... (cached) yes checking for gcc option to accept ISO C89... (cached) none needed checking dependency style of gcc... (cached) gcc3 checking how to run the C preprocessor... gcc -E checking whether ln -s works... yes checking whether make sets $(MAKE)... (cached) yes checking build system type... i686-pc-linux-gnu checking host system type... i686-pc-linux-gnu checking how to print strings... printf checking for a sed that does not truncate output... /bin/sed checking for fgrep... /bin/grep -F checking for ld used by gcc... /usr/bin/ld checking if the linker (/usr/bin/ld) is GNU ld... yes checking for BSD- or MS-compatible name lister (nm)... /usr/bin/nm -B checking the name lister (/usr/bin/nm -B) interface... BSD nm checking the maximum length of command line arguments... 1572864 checking whether the shell understands some XSI constructs... yes checking whether the shell understands "+="... yes checking how to convert i686-pc-linux-gnu file names to i686-pc-linux-gnu format... func_convert_file_noop checking how to convert i686-pc-linux-gnu file names to toolchain format... func_convert_file_noop checking for /usr/bin/ld option to reload object files... -r checking for objdump... objdump checking how to recognize dependent libraries... pass_all checking for dlltool... dlltool checking how to associate runtime and link libraries... printf %s\n checking for ar... ar checking for archiver @FILE support... @ checking for strip... strip checking for ranlib... ranlib checking command to parse /usr/bin/nm -B output from gcc object... ok checking for sysroot... no checking for mt... mt checking if mt is a manifest tool... no checking for dlfcn.h... yes checking for objdir... .libs checking if gcc supports -fno-rtti -fno-exceptions... no checking for gcc option to produce PIC... -fPIC -DPIC checking if gcc PIC flag -fPIC -DPIC works... yes checking if gcc static flag -static works... yes checking if gcc supports -c -o file.o... yes checking if gcc supports -c -o file.o... (cached) yes checking whether the gcc linker (/usr/bin/ld) supports shared libraries... yes checking whether -lc should be explicitly linked in... no checking dynamic linker characteristics... GNU/Linux ld.so checking how to hardcode library paths into programs... immediate checking whether stripping libraries is possible... yes checking if libtool supports shared libraries... yes checking whether to build shared libraries... yes checking whether to build static libraries... yes checking for an ANSI C-conforming const... yes checking for off_t... yes checking for size_t... yes checking whether time.h and sys/time.h may both be included... yes checking whether struct tm is in sys/time.h or time.h... time.h checking for working volatile... yes checking whether lstat correctly handles trailing slash... yes checking whether lstat accepts an empty string... no checking whether lstat correctly handles trailing slash... (cached) yes checking for working memcmp... yes checking whether stat accepts an empty string... no checking for strftime... yes checking for memset... yes checking for sqrt... no checking for strcasecmp... yes checking for strerror... yes checking for strncasecmp... yes checking for strstr... yes checking for fdatasync... yes checking for ftruncate... yes checking for getcwd... yes checking for gettimeofday... yes checking for localtime_r... yes checking for memmove... yes checking for strerror... (cached) yes checking for sqlite3_prepare_v2 in -lsqlite3... yes checking for sqlite3_rtree_geometry_callback in -lsqlite3... yes checking proj_api.h usability... no checking proj_api.h presence... no checking for proj_api.h... no configure: error: cannot find proj_api.h, bailing out

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• What's a good starting point to learn about JIT compilers?

  - by davidk01

  I've spent the past few months learning about stack based virtual machines, parsers, compilers, and some elementary things about hardware architecture. I've also written a few parsers and compilers for C like languages to understand the generic parser/compiler pipeline. Now I'd like to take my understanding further by learning about optimizing compilers and JIT compilers but I'm having a hard time finding material at the right level. I don't yet understand enough to dive into a code base like PyPy or LuaJIT but I also know more than what most introductory compiler books have to offer. So what are some good books for an intermediate beginner like to me to look into?

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• A question on nature of generated assembly in C++ and code Algebra

  - by Reetesh Mukul

  I wrote this code: #include <iostream> int main() { int a; std::cin >> a; if(a*a== 3){ std::cout << a; } return 0; } On MSVC I turned ON all optimization flags. I expected that since a*a can never be 3, so compiler should not generate code for the section: if(a*a== 3){ std::cout << a; } However it generated code for the section. I did not check GCC or LLVM/CLang. What are the limits of expectation from a C++ compiler in these scenarios?

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• Package libxul not fount - Kiwix Wikpedia in Ubuntu Precise 12.04

  - by JHOSmAN

  I'm trying to install the service Kiwix but I need a library that is not available for Ubuntu 12.04 LTS Precise leave the log and if someone could tell me how to install Seller would appreciate. kiwix-0.9# ls aclocal.m4 COMPILE config.sub COPYING install-sh ltmain.sh missing static AUTHORS config.guess configure depcomp kiwix Makefile.am README CHANGELOG config.log configure.ac desktop libxul-dev_1.8.1.16+nobinonly-0ubuntu1_all.deb Makefile.in src root@ubuntu-MM061:/home/ubuntu/Escritorio/kiwix-0.9# ./configure checking for a BSD-compatible install... /usr/bin/install -c checking whether build environment is sane... yes checking for a thread-safe mkdir -p... /bin/mkdir -p checking for gawk... no checking for mawk... mawk checking whether make sets $(MAKE)... yes checking whether to enable maintainer-specific portions of Makefiles... no checking for gcc... gcc checking whether the C compiler works... yes checking for C compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... no checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether gcc accepts -g... yes checking for gcc option to accept ISO C89... none needed checking for style of include used by make... GNU checking dependency style of gcc... gcc3 checking for g++... g++ checking whether we are using the GNU C++ compiler... yes checking whether g++ accepts -g... yes checking dependency style of g++... gcc3 checking for g++... g++ checking for cl... no checking for cl... no checking for Xcode... no checking for jar... jar checking build system type... i686-pc-linux-gnu checking host system type... i686-pc-linux-gnu checking for a sed that does not truncate output... /bin/sed checking for grep that handles long lines and -e... /bin/grep checking for egrep... /bin/grep -E checking for fgrep... /bin/grep -F checking for ld used by gcc... /usr/bin/ld checking if the linker (/usr/bin/ld) is GNU ld... yes checking for BSD- or MS-compatible name lister (nm)... /usr/bin/nm -B checking the name lister (/usr/bin/nm -B) interface... BSD nm checking whether ln -s works... yes checking the maximum length of command line arguments... 1572864 checking whether the shell understands some XSI constructs... yes checking whether the shell understands "+="... yes checking for /usr/bin/ld option to reload object files... -r checking for objdump... objdump checking how to recognize dependent libraries... pass_all checking for ar... ar checking for strip... strip checking for ranlib... ranlib checking command to parse /usr/bin/nm -B output from gcc object... ok checking how to run the C preprocessor... gcc -E checking for ANSI C header files... yes checking for sys/types.h... yes checking for sys/stat.h... yes checking for stdlib.h... yes checking for string.h... yes checking for memory.h... yes checking for strings.h... yes checking for inttypes.h... yes checking for stdint.h... yes checking for unistd.h... yes checking for dlfcn.h... yes checking whether we are using the GNU C++ compiler... (cached) yes checking whether g++ accepts -g... (cached) yes checking dependency style of g++... (cached) gcc3 checking how to run the C++ preprocessor... g++ -E checking for objdir... .libs checking if gcc supports -fno-rtti -fno-exceptions... no checking for gcc option to produce PIC... -fPIC -DPIC checking if gcc PIC flag -fPIC -DPIC works... yes checking if gcc static flag -static works... yes checking if gcc supports -c -o file.o... yes checking if gcc supports -c -o file.o... (cached) yes checking whether the gcc linker (/usr/bin/ld) supports shared libraries... yes checking whether -lc should be explicitly linked in... no checking dynamic linker characteristics... GNU/Linux ld.so checking how to hardcode library paths into programs... immediate checking whether stripping libraries is possible... yes checking if libtool supports shared libraries... yes checking whether to build shared libraries... yes checking whether to build static libraries... yes checking for ld used by g++... /usr/bin/ld checking if the linker (/usr/bin/ld) is GNU ld... yes checking whether the g++ linker (/usr/bin/ld) supports shared libraries... yes checking for g++ option to produce PIC... -fPIC -DPIC checking if g++ PIC flag -fPIC -DPIC works... yes checking if g++ static flag -static works... yes checking if g++ supports -c -o file.o... yes checking if g++ supports -c -o file.o... (cached) yes checking whether the g++ linker (/usr/bin/ld) supports shared libraries... yes checking dynamic linker characteristics... GNU/Linux ld.so checking how to hardcode library paths into programs... immediate checking for ranlib... (cached) ranlib checking whether make sets $(MAKE)... (cached) yes checking for pkg-config... pkg-config checking for perl... perl checking fcntl.h usability... yes checking fcntl.h presence... yes checking for fcntl.h... yes checking float.h usability... yes checking float.h presence... yes checking for float.h... yes checking libintl.h usability... yes checking libintl.h presence... yes checking for libintl.h... yes checking limits.h usability... yes checking limits.h presence... yes checking for limits.h... yes checking stddef.h usability... yes checking stddef.h presence... yes checking for stddef.h... yes checking for stdint.h... (cached) yes checking for stdlib.h... (cached) yes checking for string.h... (cached) yes checking for strings.h... (cached) yes checking sys/socket.h usability... yes checking sys/socket.h presence... yes checking for sys/socket.h... yes checking sys/time.h usability... yes checking sys/time.h presence... yes checking for sys/time.h... yes checking for unistd.h... (cached) yes checking wchar.h usability... yes checking wchar.h presence... yes checking for wchar.h... yes checking for stdbool.h that conforms to C99... yes checking for _Bool... no checking for inline... inline checking for int16_t... yes checking for int32_t... yes checking for int64_t... yes checking for int8_t... yes checking for off_t... yes checking for pid_t... yes checking for size_t... yes checking for uint16_t... yes checking for uint32_t... yes checking for uint64_t... yes checking for uint8_t... yes checking for ptrdiff_t... yes checking vfork.h usability... no checking vfork.h presence... no checking for vfork.h... no checking for fork... yes checking for vfork... yes checking for working fork... yes checking for working vfork... (cached) yes checking for stdlib.h... (cached) yes checking for GNU libc compatible malloc... yes checking for working strtod... yes checking for getcwd... yes checking for gettimeofday... yes checking for memmove... yes checking for memset... yes checking for pow... yes checking for regcomp... yes checking for sqrt... yes checking for strcasecmp... yes checking for strchr... yes checking for strdup... yes checking for strerror... yes checking for strtol... yes Package libxul was not found in the pkg-config search path. Perhaps you should add the directory containing libxul.pc' to the PKG_CONFIG_PATH environment variable No package 'libxul' found Package libxul was not found in the pkg-config search path. Perhaps you should add the directory containinglibxul.pc' to the PKG_CONFIG_PATH environment variable No package 'libxul' found checking for /stable... no checking for "/nsISupports.idl"... no configure: error: unable to find nsISupports.idl apt-get install libxul Leyendo lista de paquetes... Hecho Creando árbol de dependencias Leyendo la información de estado... Hecho E: No se ha podido localizar el paquete libxul

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• JSIL - a Dot Net to JavaScript translator

  - by TATWORTH

  JSI is described at http://jsil.org/ as:"JSIL is a compiler that transforms .NET applications and libraries from their native executable format - CIL bytecode - into standards-compliant, cross-browser JavaScript. You can take this JavaScript and run it in a web browser or any other modern JavaScript runtime. Unlike other cross-compiler tools targeting JavaScript, JSIL produces readable, easy-to-debug JavaScript that resembles the code a developer might write by hand, while still maintaining the behavior and structure of the original .NET code. Because JSIL transforms bytecode, it can support most .NET-based languages - C# to JavaScript and VB.NET to JavaScript work right out of the box."

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• Channel 9 Interview: Array and Collection Initializers in Visual Basic 2010 (Beth Massi, Spotty Bowl

  Ive written about collection initializers on my blog before, but I thought Id catch up with the VB Team to tell me more about how they really work. In this interview Spotty Bowles, a tester on the VB Compiler team, shows us a couple of new language features: Array and Collection Initializers. He gives us insight into how they are implemented in the compiler and best practices on how to use them in our code. Additionally, he discusses how to extend Collection Initializers with your own extension...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Are C or C++ The Only Viable Languages for a GC

  - by user95312

  Background I have just finished writing a compiler for a functional language compiling to the JVM as a learning project. However, since I'm just doing this to learn, I thought it might be interesting to write a native backend and a RTS for it. As I've been planning out what this new backend will look like, the one point I'm stumbling on is the garbage collector. I've implemented the compiler in Haskell. But I have no desire to write the GC in Haskell since, while it may be possible, it'd suck. Question I've looked at several FOSS garbage collectors prior to posting and most of them were implemented in good old ANSI C. Is this still the most accepted choice for writing a GC nowadays? I've seen that this site tends to frown upon questions with multiple answers so I hope this will make it more specific: If some startup was writing a professional grade gc today, are the only viable choice for them C or C++? It's my first question here so please comment and let me know if this question is ill-suited for for programmers.

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• Does GAE/OpenID/OAuth support xmlhttp proxy?

  - by h2g2java

  Currently, my code would construct the GWT form, which user would submit directly to openId (or any authenticaiton service). Such a method works fine. However, what if I had the gwt page server access the OpenID provider, is there a way/strategy for the server to mediate authentication between its client and the auth provider? I wish to know the answers with respect to GAE as the proxy and, regardless if GAE or Tomcat is the intended proxy, answers wrt Google Accounts OpenID OAuth If so, it would be wonderful if someone could describe the installation strategy.

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• If you need more than 3 levels of indentation, you're screwed?

  - by jokoon

  Per the Linux kernel coding style document: The answer to that is that if you need more than 3 levels of indentation, you're screwed anyway, and should fix your program. What can I deduct from this quote? On top of the fact that too long methods are hard to maintain, are they hard or impossible to optimize for the compiler? I don't really understand if this quote encourages better coding practice or is really a mathematical / algorithmic sort of truth. I also read in some C++ optimizing guide that dividing up a program into more function improves its design is a common thing taught at school, but it should be not done too much, since it can turn into a lot of JMP calls (even if the compiler can inline some methods by itself).

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• "more than 3 levels of indentation, you're screwed" How should I understand this quote ?

  - by jokoon

  The answer to that is that if you need more than 3 levels of indentation, you're screwed anyway, and should fix your program. What can I deduct from this quote ? On top of the fact that too long methods are hard to maintain, are they hard or impossible to optimize for the compiler ? I don't really understand if this quote encourages better coding practice or is really a mathematical/algorithmic sort of truth... I also read in some C++ optimizing guide that dividing up a program into more function improves its design is a common thing taught at school, but it should be not done too much, since it can turn into a lot of JMP calls (even if the compiler can inline some methods by itself).

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• Programming Language Family Tree?

  - by user134353

  As a man interested in programming, I must ask if there is a cataloged hierarchy of languages. I'd like to learn to actually understand what's happening- that is to say, I don't want to use a compiler until I understand what a compiler does and how to make my own. I really do want to start from total scratch. I'm told that means "machine code"? I don't know. What I do know is that "C++" is not the start. I'm not interested in learning that until I can actually break software down to its very base and see how the pieces go together.

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• New features in C++ language (C++0x)

  Explaining new C++ language features. Discussing mainly for Visual C++ 2010 compiler

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• Applet in client-server infrastructure

  - by Andrey

  Hello! I have a general question concerning client-server design. We have a Java server with Spring, a GWT client program and some HTTP-servlets for our site. At the moment we also want to develop an applet which would communicate with that server in such a way GWT-client and site requests do. Is it a good idea to communicate with the server from applet by RMI? I.e. to create some Remote services, register them with Spring and call them from applet? Thanks in advance!

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• Win32 Exceptions – OS Level Point of View

  Describes the Win32 exception layering and discusses structured exceptions handling (SEH) on OS level and on C++ compiler level.

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• Best way to delay access to static web pages until services become available with J2EE

  - by Dean Povey

  I have a J2EE application front-ended by a bunch of GWT pages. When the server is starting up, it is possible that these static pages can be accessed before the services required to implement the GWT RPC calls (database etc) are available. I wondering what the best approach is to prevent a user accessing this static content before these services become available. For the purpose of this exercise, assume that there is an isInitialized() method somewhere. I am happy with either a page displaying an error message or simply refusing the connection.

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• Programming languages with extensible syntax

  - by Giorgio

  I have only a limited knowledge of Lisp (trying to learn a bit in my free time) but as far as I understand Lisp macros allow to introduce new language constructs and syntax by describing them in Lisp itself. This means that a new construct can be added as a library, without changing the Lisp compiler / interpreter. This approach is very different from that of other programming languages. E.g., if I wanted to extend Pascal with a new kind of loop or some particular idiom I would have to extend the syntax and semantics of the language and then implement that new feature in the compiler. Are there other programming languages outside the Lisp family (i.e. apart from Common Lisp, Scheme, Clojure (?), Racket (?), etc) that offer a similar possibility to extend the language within the language itself?

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• Does Turing-complete implies possibility of malware? [closed]

  - by Mathematician82

  Is it possible to build an operating system that contains some Turing complete compiler (language?) but is unable to run any malware? Or is there any definition for a malware? This question popped on my mind as I was wondering why Windows has more malware than Linux. If Linux contains a C programming language and its compiler, I think it is possible to write a Linux program that works similarly than Windows viruses. But there are less malware for Linux than for Windows although there is a Wine for Linux to simulate Windows programs.

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• Content of AUTHORS file

  - by user14284

  GNU recommend make AUTHORS file for list of authors and contributos of a program. But how many "levels" of authors and contributors should contain the file? E.g. I write a program foo, that actively use some library. Should I include authors of the library in the AUTHORS? It seems to yes, because total code of foo contain code from library. But if yes, I should include also authors of all others libraries, including standard libraries of compiler, authors of the compiler and other tools for producing final executable code, authors of OS... When I should stop?

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• If you need more than 3 levels of indentation, you're screwed?

  - by jokoon

  Per the Linux kernel coding style document: The answer to that is that if you need more than 3 levels of indentation, you're screwed anyway, and should fix your program. What can I deduce from this quote? On top of the fact that too long methods are hard to maintain, are they hard or impossible to optimize for the compiler? I don't really understand if this quote encourages better coding practice or is really a mathematical / algorithmic sort of truth. I also read in some C++ optimizing guide that "dividing up a program into more functions improves its design" is frequently taught in CS courses, but it should be not done too much, since it can turn into a lot of JMP calls (even if the compiler can inline some methods by itself).

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