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  • JQuery - Iterate through SELECT options

    - by user208662
    Hello, I have a SELECT element in HTML. This element represents a drop down list. I'm trying to understand how to iterate through the options in the SELECT element via JQuery. How do I use JQuery to display the value and text of each option in a SELECT element? I just want to display them in an alert() box. Thank you!

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  • array_multisort and dynamic variable options.

    - by websiteguru
    Im trying to sort any array with array_multisort and everything is working great. However, based on conditions in my script, I need to change the options. So What I have so far is this: array_multisort( $sort1,SORT_ASC, $sort2,SORT_ASC, $sort3,SORT_ASC, $arraytosort ); and what I would like to have is something like this: $dynamicSort = "$sort1,SORT_ASC,$sort2,SORT_ASC,$sort3,SORT_ASC,"; array_multisort( $dynamicSort, $arraytosort ); Any suggestions?

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  • Display DropDown options on Focus

    - by davidylam
    I have a simple html dropdown, I wants to use jQuery if possible to display all the options if this control has the focus(as if the user click on the dropdown). I have tried jQuery trigger(), click(), to avail. <select id="single"> <option>Single</option> <option>Single2</option> </select>

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  • Setting the default stack size on Linux globally for the program

    - by wowus
    So I've noticed that the default stack size for threads on linux is 8MB (if I'm wrong, PLEASE correct me), and, incidentally, 1MB on Windows. This is quite bad for my application, as on a 4-core processor that means 64 MB is space is used JUST for threads! The worst part is, I'm never using more than 100kb of stack per thread (I abuse the heap a LOT ;)). My solution right now is to limit the stack size of threads. However, I have no idea how to do this portably. Just for context, I'm using Boost.Thread for my threading needs. I'm okay with a little bit of #ifdef hell, but I'd like to know how to do it easily first. Basically, I want something like this (where windows_* is linked on windows builds, and posix_* is linked under linux builds) // windows_stack_limiter.c int limit_stack_size() { // Windows impl. return 0; } // posix_stack_limiter.c int limit_stack_size() { // Linux impl. return 0; } // stack_limiter.cpp int limit_stack_size(); static volatile int placeholder = limit_stack_size(); How do I flesh out those functions? Or, alternatively, am I just doing this entirely wrong? Remember I have no control over the actual thread creation (no new params to CreateThread on Windows), as I'm using Boost.Thread.

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  • Unable to run OpenMPI across more than two machines

    - by rcollyer
    When attempting to run the first example in the boost::mpi tutorial, I was unable to run across more than two machines. Specifically, this seemed to run fine: mpirun -hostfile hostnames -np 4 boost1 with each hostname in hostnames as <node_name> slots=2 max_slots=2. But, when I increase the number of processes to 5, it just hangs. I have decreased the number of slots/max_slots to 1 with the same result when I exceed 2 machines. On the nodes, this shows up in the job list: <user> Ss orted --daemonize -mca ess env -mca orte_ess_jobid 388497408 \ -mca orte_ess_vpid 2 -mca orte_ess_num_procs 3 -hnp-uri \ 388497408.0;tcp://<node_ip>:48823 Additionally, when I kill it, I get this message: node2- daemon did not report back when launched node3- daemon did not report back when launched The cluster is set up with the mpi and boost libs accessible on an NFS mounted drive. Am I running into a deadlock with NFS? Or, is something else going on?

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  • Cross platform unicode path handling

    - by Matt Joiner
    I'm using boost::filesystem for cross-platform path manipulation, but this breaks down when calls need to be made down into interfaces I don't control that won't accept UTF-8. For example when using the Windows API, I need to convert to UTF-16, and then call the wide-string version of whatever function I was about to call, and then convert any output back to UTF-8. While the wpath, and other w* forms of many of the boost::filesystem functions help keep sanity, are there any suggestions for how best to handle this conversion to wide-string forms where needed, while maintaining consistency in my own code?

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  • Remove from a std::set<shared_ptr<T>> by T*

    - by Autopulated
    I have a set of shared pointers: std::set<boost::shared_ptr<T>> set; And a pointer: T* p; I would like to efficiently remove the element of set equal to p, but I can't do this with any of the members of set, or any of the standard algorithms, since T* is a completely different type to boost::shared_ptr<T>. A few approaches I can think of are: somehow constructing a new shared_ptr from the pointer that won't take ownership of the pointed to memory (ideal solution, but I can't see how to do this) wrapping / re-implementing shared_ptr so that I can do the above just doing my own binary search over the set Help!

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  • C++: Best text accumulator

    - by MInner
    Text gets accumulates piecemeal before being sent to client. Now we use own class that allocates memory for each piece as char massive. (Anyway, works like char[][] + std::list<char*>). Then we build the whole string, convert it into std::sting and then create boost::asio::streambuf using it. That's slow enough, I assume. Correct me if I'm wrong. I know, in many cases simple FILE type from stdio.h is used. How does it works? Allocates memory at every write into it. So, is it faster and is there any way to read into boost::asio::streambuf from FILE?

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  • List of functions references

    - by Ockonal
    Hello, I'm using boost::function for making references to the functions. Can I make a list of references? For example: boost::function<bool (Entity &handle)> behaviorRef; And I need in a list of such pointers. For example: std::vector<behaviorRef> listPointers; Of course it's wrong code due to behaviorRef isn't a type. So the question is: how can I store a list of pointers for the function?

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  • LLVM Clang 5.0 explicit in copy-initialization error

    - by kevzettler
    I'm trying to compile an open source project on OSX that has only been tested on Linux. $: g++ -v Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1 Apple LLVM version 5.0 (clang-500.2.79) (based on LLVM 3.3svn) Target: x86_64-apple-da I'm trying to compile with the following command line options g++ -MMD -Wall -std=c++0x -stdlib=libc++ -Wno-sign-compare -Wno-unused-variable -ftemplate-depth=1024 -I /usr/local/Cellar/boost/1.55.0/include/boost/ -g -O3 -c level.cpp -o obj-opt/level.o I am seeing several errors that look like this: ./square.h:39:70: error: chosen constructor is explicit in copy-initialization int strength = 0, double flamability = 0, map<SquareType, int> constructions = {}, bool ticking = false); The project states the following are requirements for the Linux setup. How can I confirm I'm making that? gcc-4.8.2 git libboost 1.5+ with libboost-serialize libsfml-dev 2+ (Ubuntu ppa that contains libsfml 2: ) freeglut-dev libglew-dev

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  • Loosely coupled implicit conversion

    - by ltjax
    Implicit conversion can be really useful when types are semantically equivalent. For example, imagine two libraries that implement a type identically, but in different namespaces. Or just a type that is mostly identical, except for some semantic-sugar here and there. Now you cannot pass one type into a function (in one of those libraries) that was designed to use the other, unless that function is a template. If it's not, you have to somehow convert one type into the other. This should be trivial (or otherwise the types are not so identical after-all!) but calling the conversion explicitly bloats your code with mostly meaningless function-calls. While such conversion functions might actually copy some values around, they essentially do nothing from a high-level "programmers" point-of-view. Implicit conversion constructors and operators could obviously help, but they introduce coupling, so that one of those types has to know about the other. Usually, at least when dealing with libraries, that is not the case, because the presence of one of those types makes the other one redundant. Also, you cannot always change libraries. Now I see two options on how to make implicit conversion work in user-code: The first would be to provide a proxy-type, that implements conversion-operators and conversion-constructors (and assignments) for all the involved types, and always use that. The second requires a minimal change to the libraries, but allows great flexibility: Add a conversion-constructor for each involved type that can be externally optionally enabled. For example, for a type A add a constructor: template <class T> A( const T& src, typename boost::enable_if<conversion_enabled<T,A>>::type* ignore=0 ) { *this = convert(src); } and a template template <class X, class Y> struct conversion_enabled : public boost::mpl::false_ {}; that disables the implicit conversion by default. Then to enable conversion between two types, specialize the template: template <> struct conversion_enabled<OtherA, A> : public boost::mpl::true_ {}; and implement a convert function that can be found through ADL. I would personally prefer to use the second variant, unless there are strong arguments against it. Now to the actual question(s): What's the preferred way to associate types for implicit conversion? Are my suggestions good ideas? Are there any downsides to either approach? Is allowing conversions like that dangerous? Should library implementers in-general supply the second method when it's likely that their type will be replicated in software they are most likely beeing used with (I'm thinking of 3d-rendering middle-ware here, where most of those packages implement a 3D vector).

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  • How would I use for_each to delete every value in an STL map?

    - by stusmith
    Suppose I have a STL map where the values are pointers, and I want to delete them all. How would I represent the following code, but making use of std::for_each? I'm happy for solutions to use Boost. for( stdext::hash_map<int, Foo *>::iterator ir = myMap.begin(); ir != myMap.end(); ++ir ) { delete ir->second; // delete all the (Foo *) values. } (I've found Boost's checked_delete, but I'm not sure how to apply that to the pair<int, Foo *> that the iterator represents). (Also, for the purposes of this question, ignore the fact that storing raw pointers that need deleting in an STL container isn't very sensible).

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  • Backup program for Windows using non-proprietary format?

    - by Cristi Diaconescu
    I'm looking at the various local backup programs for windows, and I was wondering which of them use a non-proprietary backup format? By non-proprietary, I mean I want to be able to access at least the latest version of the backed up files either directly, or by using an open-standard format like zip/7z/rdiff... The other thing I'm looking for in a backup program is the ability to create incremental backups. What I have found so far: SyncBack copies files as-is, using separate directories for versioning pretty much the same for all the 'roll you own' task scheduler + rsync/xcopy32/robocopy/MS SyncToy/etc solutions GFI Backup appears to be using Zip files, at least in their 'Business' version, not sure about the free 'Home' version. Didn't try it yet, but it's next on my list. Mozy (!) supports local backup starting with v 2.0 and basically provides a 2nd local copy on a separate partition. Subjectively, it feels slow and resource intensive (I think it took more than a week to finish the first local backup of ~ 300 GB), and does not appear to offer file versioning (arguably, you can get older file versions online). On the positive side, it looks like the local backup is integrated in the restore process which was traditionally a masochistic experience (and this goes for any online backup provider). Other suggestions? I favor ease of use over tons of options (e.g. SyncBack is very flexible but it offers sooo many ways to shoot yourself in the foot...)

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  • windows 7 64 bit visual studio 2008 libtiff build nmake error

    - by user1244539
    I am trying to build tiff 4.0.2 on my Windows 7 x64 system with Visual Studio 2008, but it was showing errors: C:\Program Files\Microsoft SDKs\Windows\v6.0A\include\mmsystem.h(2347) : error C2061: syntax error : identifier 'QINT' C:\Program Files\Microsoft SDKs\Windows\v6.0A\include\mmsystem.h(2362) : error C2059: syntax error : '}' C:\Program Files\Microsoft SDKs\Windows\v6.0A\include\mmsystem.h(2397) : error C2061: syntax error : identifier 'JOYCAPS' C:\Program Files\Microsoft SDKs\Windows\v6.0A\include\mmsystem.h(2397) : error C2059: syntax error : ';' C:\Program Files\Microsoft SDKs\Windows\v6.0A\include\mmsystem.h(2398) : error C2061: syntax error : identifier 'PJOYCAPS' C:\Program Files\Microsoft SDKs\Windows\v6.0A\include\mmsystem.h(2398) : error C2059: syntax error : ';' C:\Program Files\Microsoft SDKs\Windows\v6.0A\include\mmsystem.h(2399) : error C2061: syntax error : identifier 'NPJOYCAPS' C:\Program Files\Microsoft SDKs\Windows\v6.0A\include\mmsystem.h(2399) : error C2059: syntax error : ';' C:\Program Files\Microsoft SDKs\Windows\v6.0A\include\mmsystem.h(2400) : error C2061: syntax error : identifier 'LPJOYCAPS' C:\Program Files\Microsoft SDKs\Windows\v6.0A\include\mmsystem.h(2400) : error C2059: syntax error : ';' C:\Program Files\Microsoft SDKs\Windows\v6.0A\include\mmsystem.h(2534) : error C2146: syntax error : missing ')' before identifier 'pjc' C:\Program Files\Microsoft SDKs\Windows\v6.0A\include\mmsystem.h(2534) : error C2081: 'LPJOYCAPSA' : name in formal parameter list illegal C:\Program Files\Microsoft SDKs\Windows\v6.0A\include\mmsystem.h(2534) : error C2061: syntax error : identifier 'pjc' C:\Program Files\Microsoft SDKs\Windows\v6.0A\include\mmsystem.h(2534) : error C2059: syntax error : ';' C:\Program Files\Microsoft SDKs\Windows\v6.0A\include\mmsystem.h(2534) : error C2059: syntax error : ',' C:\Program Files\Microsoft SDKs\Windows\v6.0A\include\mmsystem.h(2534) : error C2059: syntax error : ')' NMAKE: fatal error u1077: "c:\program files(x86)\microsoft visual studio 9.0\vc\bin\cl.exe": return code '0x2' This is what I was doing: Extracted tiff 4.0.2 In VS 2008 x64 Win 7 command prompt setting the environment for x86 by running vcvars32.bat Changing the path to tiff 4.0.2/libtiff folder Running nmake /f makefile.vc to create a static library of libtiff Following these steps in Windows XP generates the .lib file but in Windows 7 it fails. This is the first time I'm making any .lib files.

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  • I am unable to run a client/server program in php

    - by sibi
    This is the program I am trying to run: $host = "127.0.0.1"; $port = 25003; // don't timeout! set_time_limit(0); // create socket $socket = socket_create(AF_INET, SOCK_STREAM, 0) or die("Could not create socket\n"); // bind socket to port $result = socket_bind($socket, $host, $port) or die("Could not bind to socket\n"); // start listening for connections $result = socket_listen($socket, 3) or die("Could not set up socket listener\n"); // accept incoming connections // spawn another socket to handle communication $spawn = socket_accept($socket) or die("Could not accept incoming connection\n"); // read client input $input = socket_read($spawn, 1024) or die("Could not read input\n"); // clean up input string $input = trim($input); echo "Client Message : ".$input; // reverse client input and send back $output = strrev($input) . "\n"; socket_write($spawn, $output, strlen ($output)) or die("Could not write output\n"); // close sockets socket_close($spawn); socket_close($socket); I enabled the PHP_socket option in WAMP but still I keep getting errors like unable to bind. Can someone please help me out?

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  • Win7 - Some pinned program's icons are corrupt, show default

    - by Andrew Backer
    I have both FF 3.6 & Chrome pinned to my taskbar in win7. The icons for these two programs show up as the ugly default icon from yesteryear. Strange. Is there some way to force an icon refresh for pinned programs? When I first added them they showed properly, but several days later they reverted to this state Un-pinning the program causes the icon to show up properly, and re-pinning it causes it to break again. These other proggies show up fine: Media Center, Media Player Classic HC, Hulu Desktop, WMP, and the folders. I have 2 user accounts on this box, and both are showing this behavior. I have tried changing the taskbar icon size to 'small' and back, but to no effect. Edit (Add) The icons show up as broken in the start menu too, but I can navigate to the EXE directly. When I click "change icon" in the properties for the start menu entry I get the error : Can not find %ProgramFiles%\Google\Chrome...\chrome.exe.

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  • In Fedora, Perl program cannot find Time::Piece library

    - by Eric Leschinski
    I have a Perl program named /usr/bin/octbatch running as a script on Fedora 17 Linux. When I run this command: /usr/bin/octbatch I get the error: Can't locate Time/Piece.pm in @INC (@INC contains: /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5) at /usr/bin/octbatch line 6. BEGIN failed--compilation aborted at /usr/bin/octbatch line 6. Here is the relevant lines of the Perl script: #!/usr/bin/perl -wT $ENV{PATH} = "/bin:/usr/bin:/usr/local/bin"; use strict; use POSIX qw(setsid :sys_wait_h); use Time::Piece; use Time::Local; I have to install Piece.pm so perl can find it. I've already installed it with this command (using the defaults): /usr/bin/perl -MCPAN -e install Time::Piece I have the Piece.pm file in /home/el/perl5/lib/perl5/x86_64-linux-thread-multi/ however when I run the octbatch command I get the same error as above. Like it can't even find it. Here is my PERL5LIB variable: el@defiant ~/gnuoctbluehost/single_stock_analysis $ env | grep PERL5 PERL5LIB=/home/el/perl5/lib/perl5/x86_64-linux-thread-multi:/home/el/perl5/lib/perl5 And the Piece.pm is located under /home/el/perl5/lib/perl5/x86_64-linux-thread-multi So my question is, Why is it not finding my Piece.pm file? And what are the ways I can get the @INC variable to include it. Or how do I make perl see it?

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  • /etc/security/limits.conf for setting program limits in Linux

    - by Flavius Akerele
    I have the following inside /etc/security/limits.conf (I have specified root separately because * will not include it.) user2 - core unlimited * - core 0 root - core 0 * - rss 512000 root - rss 512000 * - nproc 100 root - nproc 100 * - maxlogins 1 root - maxlogins 1 I run a program as user2 (./programname) but /proc/3498/limits says cores are disabled: Limit Soft Limit Hard Limit Units Max cpu time unlimited unlimited seconds Max file size unlimited unlimited bytes Max data size unlimited unlimited bytes Max stack size 8388608 unlimited bytes Max core file size 0 0 bytes Max resident set 524288000 524288000 bytes Max processes 100 100 processes Max open files 1024 1024 files Max locked memory 65536 65536 bytes Max address space unlimited unlimited bytes Max file locks unlimited unlimited locks Max pending signals 14001 14001 signals Max msgqueue size 819200 819200 bytes Max nice priority 0 0 Max realtime priority 0 0 Max realtime timeout unlimited unlimited us Both ulimit -Sa and ulimit -Ha output that cores are disabled: core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 14001 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) 512000 open files (-n) 1024 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) unlimited cpu time (seconds, -t) unlimited max user processes (-u) 100 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited Why are cores disabled ?

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  • User-friendly program to create editable & searchable pdf files, like tax & application forms and su

    - by Nick Gorbikoff
    Hello. Can somebody recommend user-friendly program that will create ( or convert from Excel & Word, or OpenOffice) editable pdf forms. You know like tax forms, that some of us filled out. Where you can create a form with predefined format and stationary, but let user edit/fill out fields. I need something user-friendly that a regular person can use. I'm NOT looking for a pdf library ( I already use wkhtmltopdf for generating pdfs programmaticaly). The reason is that we have about 400 documents ( internal expense forms, traing forms, etc) in .doc and .xls format that we want to convert to editable pdf ( so that people don't have to fill them out by hand). Coding 400 templates and then converting them using some lib or command line tool - is not my idea of fun, espsecially since those form change all the time. I'd like to just give HR and Quality department the tool, so that they can maintain those documents. I looked at everything listed on this page ( http://www.cogniview.com/convert-pdf-to-excel/post/pdf-editing-creation-50-open-sourcefree-alternatives-to-adobe-acrobat/ ), but can't find what I need. Thank you!!!

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  • Windows 2003 R2 zip program blocking EXE file

    - by Harvey Kwok
    I have a Windows 2003 R2 Enterprise Edition SP2 32-bit machine with all latest patch (as of 1-6-2011). It's a VM. I have a zip file, including a pdf file, a txt file and a exe file. If I copy the zip file onto the machine via a shared network drive, I can unzip all the files properly without problems. If I put the zip file on my web server and then I download it from there, I can only unzip the pdf file and txt file. The exe file is silently ignored. I searched the web and found somebody reporting similar issue on XP. If I right click on the zip file downloaded from the web server, at the bottom of the general page, it has a warning message saying that "This file came from antoher computer and might be blocked to help protect this computer" I understand that I can solve the problem by simply clicking the "Unblock" button and extract the file again. The things that bothering me is that why the warning message says "might be blocked"? I tried downloading the same zip file from the same web server on to my Windows 7 box with latest patch. It also shows the same warning message. However, even with the warning message, I can extract all the files properly without clicking the "Unblock" button. Is it a bug in Windows 2003 R2 SP1? Is there any security settings controlling this? How likely will the end user seeing this problem? I want to dig into this because I am worrying people downloading my zip file from my web server might see similar problems. The first thought coming to the user's mind will be the zip file is somehow corrupted. Honestly, I didn't know this "Unblock" feature in Windows before I run into this problem. EDIT I just tried it on another Windows 2003 R2 SP1 machine. The zip program doesn't block the EXE file on that machine either. Both Windows 2003 R2 SP1 machines are joining to the same forest.

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  • /etc/security/limits.conf for setting program limits in Linux

    - by Flavius Akerele
    I have the following inside /etc/security/limits.conf (I have specified root separately because * will not include it.) user2 - core unlimited * - core 0 root - core 0 * - rss 512000 root - rss 512000 * - nproc 100 root - nproc 100 * - maxlogins 1 root - maxlogins 1 I run a program as user2 (./programname) but /proc/3498/limits says cores are disabled: Limit Soft Limit Hard Limit Units Max cpu time unlimited unlimited seconds Max file size unlimited unlimited bytes Max data size unlimited unlimited bytes Max stack size 8388608 unlimited bytes Max core file size 0 0 bytes Max resident set 524288000 524288000 bytes Max processes 100 100 processes Max open files 1024 1024 files Max locked memory 65536 65536 bytes Max address space unlimited unlimited bytes Max file locks unlimited unlimited locks Max pending signals 14001 14001 signals Max msgqueue size 819200 819200 bytes Max nice priority 0 0 Max realtime priority 0 0 Max realtime timeout unlimited unlimited us Both ulimit -Sa and ulimit -Ha output that cores are disabled: core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 14001 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) 512000 open files (-n) 1024 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) unlimited cpu time (seconds, -t) unlimited max user processes (-u) 100 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited Why are cores disabled ?

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  • Microsoft Home Use Program - use more than one computer

    - by kristof
    I purchased a copy of MS Office through Microsoft Home Use Program (HUP) It basically allows you get a very cheap copy for home use if your employer owns the licence. My question is: Can I install it on more than one PC/laptop at home? I could not find anything in FAQ Thank you EDIT I was installing Office 2010 I found the following in the EULA: MICROSOFT SOFTWARE LICENSE TERMS .... 2 INSTALLATION AND USE RIGHTS. a. One Copy per Device. You may install one copy of the software on one device. That device is the “licensed device.” b. Licensed Device. You may only use one copy of the software on the licensed device at a time. c. Portable Device. You may install another copy of the software on a portable device for use by the single primary user of the licensed device. Here is the full copy of the licence

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