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  • Create a variable which is named depending on an ID number?

    - by gray
    Is there any way to create a variable, and add an ID to the end of the actual variable name? I have a variable called 'gauge', used to create a new Gauge object: var gauge = new Gauge(target).setOptions(opts); I want to add an ID to the variable, so something like: var gauge+id = new Gauge(target).setOptions(opts); It's because I'm creating a number of these objects, and have a specific ID already for each one, which I want to attach to the gauge object if possible? All my code for this function is below, if it gives you a better idea of what i need to do: function go(id, votes) { var val = $('#votes_'+id).text(); var target = document.getElementById('foo_'+id); // your canvas element var gauge = new Gauge(target).setOptions(opts); // create sexy gauge! gauge.maxValue = 100; // set max gauge value gauge.animationSpeed = 20; // set animation speed (32 is default value) var a=votes+0.5; gauge.set(val); // set actual value } My main problem arises on the last line. It says gauge.set(val), and it only sets the last object, ignoring all the other ones...

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  • What does the C++ compiler error "looks like a function definition, but there is no parameter list;"

    - by SkyBoxer
    #include <iostream> #include <fstream> using namespace std; int main { int num1, num2; ifstream infile; ostream outfile; infile.open("input.dat"); outfile.open("output.dat"); infile >> num 1 >> num 2; outfile << "Sum = " << num1 + num2 << endl; infile.close() outfile.close() return 0; } This is what I did and when I compile it, I got this error that said error C2470: 'main' : looks like a function definition, but there is no parameter list; skipping apparent body Please don't hate me :( I am new at this computer science....

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  • IDL-like parser that turns a document definition into powerful classes?

    - by paniq
    I am looking for an IDL-like (or whatever) translator which turns a DOM- or JSON-like document definition into classes which are accessible from both C++ and Python, within the same application expose document properties as ints, floats, strings, binary blobs and compounds: array, string dict (both nestable) (basically the JSON type feature set) allow changes to be tracked to refresh views of an editing UI provide a change history to enable undo/redo operations can be serialized to and from JSON (can also be some kind of binary format) allow to keep large data chunks on disk, with parts only loaded on demand provide non-blocking thread-safe read/write access to exchange data with realtime threads allow multiple editors in different processes (or even on different machines) to view and modify the document The thing that comes closest so far is the Blender 2.5 DNA/RNA system, but it's not available as a separate library, and badly documented. I'm most of all trying to make sure that such a lib does not exist yet, so I know my time is not wasted when I start to design and write such a thing. It's supposed to provide a great foundation to write editing UI components.

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  • In ArrayBlockingQueue, why copy final member field into local final variable?

    - by mjlee
    In ArrayBlockingQueue, any method that requires lock will get set 'final' local variable before calling 'lock()'. public boolean offer(E e) { if (e == null) throw new NullPointerException(); final ReentrantLock lock = this.lock; lock.lock(); try { if (count == items.length) return false; else { insert(e); return true; } } finally { lock.unlock(); } } Is there any reason to set a local variable 'lock' from 'this.lock' when field 'this.lock' is final also. Additionally, it also set local variable of E[] before acting on. private E extract() { final E[] items = this.items; E x = items[takeIndex]; items[takeIndex] = null; takeIndex = inc(takeIndex); --count; notFull.signal(); return x; } Is there any reason for copying to local final variable?

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  • Objective-C Result from a Static Method saved to class instance variable giving "EXC_BAD_ACCESS" when used.

    - by KinGBin
    I am trying to store the md5 string as a class instance variable instead of the actual password. I have a static function that will return a md5 string which I'm trying to store in an instance variable instead of the actual password. I have the following setter for my class instance variable: -(void)setPassword:(NSString *)newpass{ if(newpass != password){ password = [utils md5HexDigest:newpass]; } } This will pass back the correct md5 string and save it to the password variable in my init function: [self setPassword:pword];. If I call another instance method and try to access self.password" I will get "EXC_BAD_ACCESS". I understand that the memory is getting released, but I have no clue to make sure it stays. I have tried alloc init with autorelease with no luck. This is the md5HexDigest function getting called during the init (graciously found in another stackoverflow question): + (NSString*)md5HexDigest:(NSString*)input { const char* str = [input UTF8String]; unsigned char result[CC_MD5_DIGEST_LENGTH]; CC_MD5(str, strlen(str), result); NSMutableString *ret = [NSMutableString stringWithCapacity:CC_MD5_DIGEST_LENGTH*2]; for(int i = 0; i<CC_MD5_DIGEST_LENGTH; i++) { [ret appendFormat:@"%02x",result[i]]; } return ret; } Any help/pointers would be greatly appreciated. I would rather have the md5 string saved in memory than the actual password calling the md5 every time I needed to use the password. Thanks in advance.

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  • Can't call an object method. PHP reports variable undefined

    - by user1285697
    This is the weirdest bug! It is probably something silly, but I have no idea how to fix it. If anyone could help, I would be most grateful! I have three files, one is called items.php, another is called tableFunctions.php, and the third is called mysql.php. I use two global objects called 'mysql' and 'tableFunctions'. They are stored in the files 'mysql.php', and 'tableFunctions.php', respectively. In each file, I create an instance of its object, assigning it to the global variable $_mysql, or $_table. like this: In the file mysql.php: global $_mysql; $_mysql = new mysql(); In the file tableFunctions.php: global $_table; $_table = new tableFunctions(); Here's how it is supposed to work: The items.php file includes the tableFunctions.php file... Which in turn, needs the mysql.php file, so it includes it too. In the items.php file, I call the method getTable(), which is contained in the object tableFunctions.(and in the variable $_table.) Like this: $t = $_table->getTable('items'); The getTable function calls the method, arrayFromResult(), which is contained within in the object mysql.(and in the variable $_mysql.) Like this: $result = $_mysql->arrayFromResult($r); That's where I get the error. PHP says that the variable '$_mysql' is undefined, but I defined it in the 'mysql.php' file.(see above) I also included mysql.php with the following code: include_once 'mysql.php'; I have no idea what is wrong! If anyone can help that would be much appreciated. The source files can be downloaded with the following link: https://www.dropbox.com/sh/bjj2gyjsybym89r/YLxqyNvQdn

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  • How to modify PATH variable for X11 during log-in?

    - by user1028435
    Original question is here: Overwriting "Print Screen" actions in linux without administrative rights. Decided to revise my question, based on what I learned there: Essentially, my problem is that I am working on some lab computers (read: no administrative rights) that, if I log in, I need to change the PATH variable as X11 starts. The reason is that I need to change the PATH variable at this time, as opposed to later, is that the Print Screen command seems to "bind" during login (forgive my bad explanation of this). You can see in the work-around I listed in the previous section, that I can make it work by starting a new X, but I was wondering if it is possible to change upon login. Any ideas?

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  • How to modify PATH variable for X11 during log-in?

    - by user1028435
    I originally posted this over at StackOverflow, but someone said it might fit better here. Original question is here: http://stackoverflow.com/questions/10096327/overwriting-print-screen-actions-in-linux-without-administrative-rights. Decided to revise my question, based on what I learned there: Essentially, my problem is that I am working on some lab computers (read: no administrative rights) that, if I log in, I need to change the PATH variable as X11 starts. The reason is that I need to change the PATH variable at this time, as opposed to later, is that the Print Screen command seems to "bind" during login (forgive my bad explanation of this). You can see in the work-around I listed in the previous question, that I can make it work by starting a new X, but I was wondering if it is possible to change upon login. If this seems a poor explanation, you can check out the original link for my context and reasoning behind what I'm doing. Any ideas? Details about Distribution: cat /etc/redhat-release tells me: Red Hat Enterprise Linux Client release 5.8 (Tikanga)

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  • How do I reset the $PATH variable on Mac OS X?

    - by Neil
    I've messed up my path variable, and now some apps that I run raise errors saying Command Not Found (error 127) for commands like 'date' and 'sleep'. These commands work fine when executed directly in the shell. I'm guessing this has something to do with a malformed $PATH variable, and need to know how to reset it. I've deleted the files ~/.bashrc , ~/.bash_profile, /etc/bash.bashrc, and ~/.bashrc and ~/.profile. What other files could hold my $PATH? Is there some simpler way to reset the Path than dig into the myriad files which could hold my path? Note, this path problem is only with my user. I made a test user on my system, and the path was fine, back to normal.

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  • The cd command using variable to mapped NFS volume within ssh in linux script is not working

    - by Bhavya Maheshwari
    I have to do the following from within a bash script. The /VMNFS/ folder is present on linux box, from where script is run, and is mapped to the machine into which i am ssh'ing, as an NFS at /vmfs/volumes/VMNFS/. The second cd command doesn't work, neither with symbolic path name nor physical pathname. Why? and How to rectify this? #!/bin/bash ssh -2 [email protected] /bin/sh <<\EOF vmfile_path=`grep / vmvar_file` datastore_path=/vmfs/volumes/VMNFS/ cd $datastore_path && echo "The present working directory is" `pwd -P` esxi_vmfile_path_sub=`pwd -P` && echo "variable value is" $esxi_vmfile_path_sub esxi_vmfile_path=`echo $vmfile_path | sed "s:/VMNFS:$esxi_vmfile_path_sub:"` cd "$esxi_vmfile_path" EOF ***Output***: The current working directory is /vmfs/volumes/65335ec4-46d12e41 variable value is /vmfs/volumes/65335ec4-46d12e41 can't cd to /vmfs/volumes/65335ec4-46d12e41/TPAE7.5/

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  • TF2010 Build Definition and Access to Path is Denied error?

    - by Daniel DiVita
    I am new to TFS with regards to build definitions. I have a a build folder setup where I have set the permissons so EVERYONE has full control. Here is the exact error I am getting: E:\Builds\PIMSite\PIM.Site\PIM_Site.metaproj: Unable to copy file "C:\Builds\1\PIM System\PIM Site Build\Binaries\HtmlAgilityPack.xml" to "..\PIM.Site\Bin\HtmlAgilityPack.xml". Access to the path '..\PIM.Site\Bin\HtmlAgilityPack.xml' is denied. I have tried everyhitng. I have removed everything from that folder adn can delete it just fine so it is not being used by another process. Any thoughts?

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  • What''s the "earliest" place one can set an environment variable during Linux boot process?

    - by amn
    I know I can set a variable in a shell startup file, but the thing is, I am trying to set up a POSIX-compatible environment, and a POSIX shell does not parse any startup files other than the one specified by the environment variable ENV. This presents a problem - currently my login starts the shell as bash, which I will try to replace with sh so Bash runs as POSIX shell - however then it will not parse the default startup files and I need ENV set to specify these. Which means as far as I understand that I need to specify ENV before login starts the shell, correct? Now, how would I do that? I hope my question is clear, if not I will gladly redact it.

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  • Is testing every Anti-Virus definition before deployment feasible?

    - by Sim
    With the recent problems that McAfee customers have had over the last week there has been lots of opinion that not only should the AV vendors have better testing but customers should test AV signatures before deploying. Is this feasible? If you are doing this already do you take other measures to minimise exposure to malware while you are testing?

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  • Matching a smaller piece of text in a local variable to a larger piece of text that I have pulled in a query

    - by Hoser
    I think this is a simple question, but google searching for 30 minutes was mostly wasted time as all I can find is matching a variable to a 'randompieceoftext'. Anyways, suppose I have a local variable called @ServerName. This server name will be something like CCPWIQAUL. I need to match this server name to various path names, which is of the form: serverName.something.somethingelse.com These path names are pulled from a database, and will be in the column vManagedEntity.Path How do I do something like this? Is @ServerName is IN vManagedEntity.Path?

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  • when compiling,I write " gcc -g -Wall dene2 dene2.c", then gcc emits some trace

    - by gcc
    when I compile my code,I write " gcc -g -Wall dene2 dene2.c" in the console. then gcc emits some things on the screen. I havenot understand what it is and I cannot consturct any meaning. I have sorted in google but I havenot seen any information about thing which gcc emits on screen I am not saying examining all of the things which is at below,just show me "how to catch fish". (I couldnot find meaningful title ,for that reason ,sorry,) dene2: In function `_start': /build/buildd/eglibc-2.10.1/csu/../sysdeps/i386/elf/start.S:65: multiple definition of `_start' /usr/lib/gcc/i486-linux-gnu/4.4.1/../../../../lib/crt1.o:/build/buildd/eglibc-2.10.1 /csu/../sysdeps/i386/elf/start.S:65: first defined here dene2:(.rodata+0x0): multiple definition of `_fp_hw' /usr/lib/gcc/i486-linux-gnu/4.4.1/../../../../lib/crt1.o:(.rodata+0x0): first defined here dene2: In function `_fini': (.fini+0x0): multiple definition of `_fini' /usr/lib/gcc/i486-linux-gnu/4.4.1/../../../../lib/crti.o:(.fini+0x0): first defined here dene2:(.rodata+0x4): multiple definition of `_IO_stdin_used' /usr/lib/gcc/i486-linux-gnu/4.4.1/../../../../lib/crt1.o:(.rodata.cst4+0x0): first defined here dene2: In function `__data_start': (.data+0x0): multiple definition of `__data_start' /usr/lib/gcc/i486-linux-gnu/4.4.1/../../../../lib/crt1.o:(.data+0x0): first defined here dene2: In function `__data_start': (.data+0x4): multiple definition of `__dso_handle' /usr/lib/gcc/i486-linux-gnu/4.4.1/crtbegin.o:(.data+0x0): first defined here dene2: In function `_init': (.init+0x0): multiple definition of `_init' /usr/lib/gcc/i486-linux-gnu/4.4.1/../../../../lib/crti.o:(.init+0x0): first defined here /tmp/ccMlGkkV.o: In function `main': /home/fatih/Desktop/dene2.c:5: multiple definition of `main' dene2:(.text+0xb4): first defined here /usr/lib/gcc/i486-linux-gnu/4.4.1/crtend.o:(.dtors+0x0): multiple definition of `__DTOR_END__' dene2:(.dtors+0x4): first defined here collect2: ld returned 1 exit status

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  • Error trying to use rand from std library cstdlib with g++

    - by Matt
    I was trying to use the random function in Ubuntu compiling with g++ on a larger program and for some reason rand just gave weird compile errors. For testing purposes I made the simplest program I could and it still gives errors. Program: #include <iostream> using std::cout; using std::endl; #include <cstdlib> int main() { cout << "Random number " << rand(); return 0; } Error when compiling with the terminal sudo g++ chapter_3/tester.cpp ./test ./test: In function _start': /build/buildd/eglibc-2.10.1/csu/../sysdeps/i386/elf/start.S:65: multiple definition of_start' /usr/lib/gcc/i486-linux-gnu/4.4.1/../../../../lib/crt1.o:/build/buildd/eglibc-2.10.1/csu/../sysdeps/i386/elf/start.S:65: first defined here ./test:(.rodata+0x0): multiple definition of _fp_hw' /usr/lib/gcc/i486-linux-gnu/4.4.1/../../../../lib/crt1.o:(.rodata+0x0): first defined here ./test: In function_fini': (.fini+0x0): multiple definition of _fini' /usr/lib/gcc/i486-linux-gnu/4.4.1/../../../../lib/crti.o:(.fini+0x0): first defined here ./test:(.rodata+0x4): multiple definition of_IO_stdin_used' /usr/lib/gcc/i486-linux-gnu/4.4.1/../../../../lib/crt1.o:(.rodata.cst4+0x0): first defined here ./test: In function __data_start': (.data+0x0): multiple definition ofdata_start' /usr/lib/gcc/i486-linux-gnu/4.4.1/../../../../lib/crt1.o:(.data+0x0): first defined here ./test: In function __data_start': (.data+0x4): multiple definition of__dso_handle' /usr/lib/gcc/i486-linux-gnu/4.4.1/crtbegin.o:(.data+0x0): first defined here ./test: In function main': (.text+0xb4): multiple definition ofmain' /tmp/cceF0x0p.o:tester.cpp:(.text+0x0): first defined here ./test: In function _init': (.init+0x0): multiple definition ofinit' /usr/lib/gcc/i486-linux-gnu/4.4.1/../../../../lib/crti.o:(.init+0x0): first defined here /usr/lib/gcc/i486-linux-gnu/4.4.1/crtend.o:(.dtors+0x0): multiple definition of `_DTOR_END' ./test:(.dtors+0x4): first defined here /usr/bin/ld: error in ./test(.eh_frame); no .eh_frame_hdr table will be created. collect2: ld returned 1 exit status

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  • Trying to inherit variable "text" from Form 1 for use in Form 2????

    - by JB
    I have a Form 1 as listed below, im trying to inherit the variable text from it so i can compare is value in an if statement so i can output the file specified for that id number in Form 2...is this possible??? Form 1, where variable is being used: public void button2_Click(object sender, System.EventArgs e) { timer1.Enabled = true; string text = textBox1.Text; Mainform = this; this.Hide(); } Form 2 where im trying to use the variable: if (text == "900456318") { System.Diagnostics.Process.Start("C:\\Users\\Joshua Banks\\Desktop\\Downtown_atlanta_night"); } }

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  • How to check if a variable exists in a FreeMarker template?

    - by Don
    Hi, I have a Freemarker template which contains a bunch of placeholders for which values are supplied when the template is processed. I want to conditionally include part of the template if the userName variable is supplied, something like: [#if_exists userName] Hi ${userName}, How are you? [/#if_exists] However, the FreeMarker manual seems to indicate that if_exists is deprecated, but I can't find another way to achieve this. Of course, I could simple providing an additional boolean variable isUserName and use that like this: [#if isUserName] Hi ${userName}, How are you? [/#if] But if there's a way of checking whether userName exists then I can avoid adding this extra variable. Cheers, Don

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  • How can I store Perl's system function output to a variable?

    - by karthi-27
    I have a problem with the system function. I want to store the system functions output to a variable. For example, system("ls"); Here I want all the file names in the current directory to store in a variable. I know that I can do this by redirecting the output into a file and read from that and store that to a variable. But I want a efficient way than that. Is there any way .

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  • ASP.NET How expensive is it to call an Application Variable many times?

    - by Matias Nino
    The short of it is: Is it costly to check an Application Variable such as Application("WebAppName") more 10-20 times each time a page loads? Background: (feel free to critique) Some includes in my site contain many links and images which cannot use relative urls due to their inclusion in different paths. Hence these includes contain frequent instances of <img src="<%=Application("Webroot")%>images\image.gif"> Is it expensive to keep calling an Application variable like this? Should I just put the Application value in some local variable to use where needed? IMPORTANT NOTE: I need my webapp to run fine on a server whether it be in the root web ("/") or in a virtual subweb ("/app"). Thanks in advance for any wisdom shared.

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  • How can I use a variable as a module name in Perl?

    - by mjn12
    I know it is possible to use a variable as a variable name for package variables in Perl. I would like to use the contents of a variable as a module name. For instance: package Foo; our @names =("blah1", "blah2"); 1; And in another file I want to be able be able to set the contents of a scalar to "foo" and then access the names array in Foo through that scalar. my $packageName = "Foo"; Essentially I want to do something along the lines of: @{$packageName}::names; #This obviously doesn't work. I know I can use my $names = eval '$'. $packageName . "::names" But only if Foo::names is a scalar. Is there another way to do this without the eval statement?

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  • Navigate Quickly with JustCode and Ctrl+Click

    Ctrl + Click is a widely used shortcut for Go To Definition in many development environments but not in Visual Studio. We, the JustCode team, find it really useful so we added it to Visual Studio. But we didn't stop there - we improved it even further. Read on to find the details. With JustCode you get an enhanced Go To Definition. By default you can execute it in the Visual Studio editor using one of the following shortcuts: Middle Click, Ctrl+Left Click, F12, Ctrl+Enter, Ctrl+B. The first usage of this feature is not much different from the default Visual Studio Go To Definition command use it where a member, type, method, property, etc is used to navigate to the definition of that item. For example, if you have this method:         public void Start()         {             lion = new Lion();             lion.Roar();         } If you hold Ctrl and click on the usage of the lion you will go to the lion member definition. If you hold Ctrl and click on the Lion you will go to the Lion class definition. What we added is the ability to easily find all the usages of the item you just navigated to. For example:     public class Lion     {         public void Roar()         {             Console.WriteLine("Rhaaaar");         }     }   If you hold Ctrl and click on the Lion definition you will see all the usages of the Lion type; if you click on the Roar method definition you will see all the usages of the Roar method: And if there is only one usage you will get automatically to that usage. In the examples I use C#, but it works also in VB.NET, JavaScript, ASP.NET and XAML. Why we like this feature? Let me first start with how the Ctrl+Click (or Go To Definition command) is used. We noticed that developers use it especially in what we call "code browsing sessions". In simple words this is when you browse around the code looking for a bug, just reading the code or searching for something. Sounds familiar? In our experience when you go to the definition of some item you often want to know more about it and the first thing you need is to find its usages. With JustCode this is just one click away. Why Ctrl+Click/Middle Click over F12/Ctrl+Enter/Ctrl+B? Actually you can use all of them. But during these "code browsing sessions" we noticed that most developers use the mouse. So the mouse is already in use and pressing Ctrl+Click (or the Middle Click) is so natural. During heavy coding sessions or if you are a keyboard type developer F12 (or any of the other keyboard shortcuts) is the key. We really use heavily this feature not only in our team but in the whole company. It saves us a bit of time many times a day. And it adds up. We hope you will like it too. Your feedback is more than welcome for us. P.S. If you dont want JustCode to capture the Ctrl+Click and the Middle Click in the editor, you can change that in JustCode->Options->General in the Navigation group. Keyboard shortcuts can be reassigned using the Visual Studio keyboard shortcuts editor.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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  • How to get the previous value from incrementing variable in for loop?

    - by Parth
    In My last post I asked : How to create dynamic incrementing variable using "for" loop in php? like wise: $track_1,$track_2,$track_3,$track_4..... so on.... whose answer I selected as for($i = 0; $i < 10; $i++) { $name = "track_$i"; $$name = 'hello'; } and for($i = 0; $i < 10; $i++) { ${'track_' . $i} = 'val' } Now, What If I need the Value of variable previous than the current variable?

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