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  • How do I create and read non-global variables that aren't destroyed at end of function?

    - by Paul Reilly
    I am attempting to code some plugins to use with MIDI sequencers but have hit a stumbling block. I can't use global-scope variables to store information because multiple instances of the .dll can exist which share memory. How do I create a class (for re-usability purposes in other plugins) containing 2 dimensional array and other variables the content of which is to be shared between functions? If that is possible, how would I read and write the data from the function in the framework where I do the processing?

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  • How to choose between UUIDs, autoincrement/sequence keys and sequence tables for database primary keys?

    - by Tim
    I'm looking at the pros and cons of these three primary methods of coming up with primary keys for database rows. So assuming I am using a database that supports more than one of these methods, is there a simple heuristic to determine what the best option would be for me? How do considerations such a distributed/multiple masters, performance requirements, ORM use, security and testing have on the choice? Any unexpected drawbacks that one might run into?

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  • interactive login on perl cgi script- updated question [closed]

    - by raindrop18
    I am new for perl-cgi script. and my objective is to create user/pass interactive script to log and get information from multiple device at once. instead of add the user/pass credential on the script itself. since i am new if some one show me how to write the interactive part of the script. thanks much!!! here is the current code usr/local/bin/perl -wl use CGI ':standard'; use Net::Telnet::Cisco; # ### set the error fields to nulls $selerror = ""; # ### Input from the screen - make sure data was input if (param() and param('Switches') ne "" and (param('Mac') ne "" or param('Interface Description') ne "" or param('VLAN') ne "" )) { # ### Put the input devices into an array. @devices = param('Switches'); # ### format the header data print header(); print start_html(-title=>"ShowSwitches",-BGCOLOR=>'aqua'); print "\n",h1("<CENTER>Show Switches</CENTER>"); print "\n",hr(),"\n"; # ### Go thru the device array. foreach(@devices) { $error_msg = ""; $TAC_login_error = ""; $open_error = ""; $retry_open_error = ""; $prompt_error = ""; $password_error = ""; # ### Take input host and use to send to Telnet $host = $_; $session = Net::Telnet::Cisco->new(Errmode => 'return', Timeout => 30); # ### Connect to the host $session->open(Host =>"$host", Timeout => 15); $open_error = $session->errmsg; # ### Login with TACACS if host can be connected to if ($open_error eq "") { $session->login('USER', 'PASS'); $TAC_login_error = $session->errmsg; # ### Login with TACACS failed - try standard login if ($TAC_login_error ne "") { # ### Connect to host $session->open(Host =>"$host", Timeout => 15); $retry_open_error = $session->errmsg; # ### Wait for password prompt - multiple matches - devices may have different device prompts. if ($retry_open_error eq "") { $session->waitfor(Match => '/Password:.*$/', Match => '/Enter password:.*$/', Timeout => 20); $prompt_error = $session->errmsg; if ($prompt_error eq "") { # ### Input password $session->print('getmeout'); $password_error = $session->errmsg; $session->waitfor('/.*>$/'); $password_error = $session->errmsg; } } } } # ### No errors, then issue "show commands". if ($open_error eq "" and ($TAC_login_error eq "" or $retry_open_error eq "") and $prompt_error eq "" and $password_error eq "") { # ### Show Mac if (param('Mac')) { $cmd = 'sh mac'; @output = $session->cmd("$cmd"); $show_error = ""; $show_error = $session->errmsg; print "\n",h2($host . ' - ' . $cmd); if ($show_error ne "") { $error_msg = 'Error for show mac - ' . $show_error; print b($error_msg),(br); print hr(),"\n"; $error_msg = ''; } else { print pre(@output); print hr(),"\n"; } } # ### Show Interface Description if (param('Interface Description')) { $cmd = 'sh interface description'; @output = $session->cmd("$cmd"); $show_error = ""; $show_error = $session->errmsg; print "\n",h2($host . ' - ' . $cmd); if ($show_error ne "") { $error_msg = 'Error for show mac - ' . $show_error; print b($error_msg),(br); print hr(),"\n"; $error_msg = ''; } else { print pre(@output); print hr(),"\n"; } } # ### Show VLAN if (param('VLAN')) { $cmd = 'sh vlan'; @output = $session->cmd("$cmd"); $show_error = ""; $show_error = $session->errmsg; print "\n",h2($host . ' - ' . $cmd); if ($show_error ne "") { $error_msg = 'Error for show vlan - ' . $show_error; print b($error_msg),(br); print hr(),"\n"; $error_msg = ''; } else { print pre(@output); print hr(),"\n"; } } } elsif ($TAC_login_error ne "" and $password_error ne "") { $error_msg = "Error - $host " . $TAC_login_error . ' - possible incorrect TACACS or standard password parameters on device.'; } elsif ($open_error ne "") { $error_msg = "Error - $host " . $open_error . ' - cannot connect to host - is it down??'; } elsif ($prompt_error ne "") { $error_msg = "Error - $host " . $prompt_error . ' - password prompt not recognized - invalid TACACS (or user) password.'; } elsif ($password_error ne "") { $error_msg = "Error - $host " . $password_error . ' - possible incorrect user/password parameters on device.'; } if ($error_msg ne "" ) { print b($error_msg),(br); print hr(),"\n"; } print hr(),"\n"; print end_html(),"\n"; } } else { # ### No Show command was selected. if (param('Submit') and param('Mac') eq "" and param('Interface Description') eq "" and param('VLAN') eq "" ) { $selerror = 'No Show Displays were selected. Try again please!!'; } elsif # ### No switch was selected. (param('Submit') and param('Switches') eq "") { $selerror = 'No devices were selected. Try again please!!'; } # ### This formats the initial Show Web page. print header(-Pragma=>'no-cache'), start_html(-title=>"Show Displays",-BGCOLOR=>'aqua'), h1("<CENTER>Show Switches</CENTER>"),hr(), start_form(), b("Select Show Commands:"), br(), br(), checkbox(-name=>'Mac'), checkbox(-name=>'Interface Description'), checkbox(-name=>'VLAN'), br(),br(),hr(),br(), b("Select One or More Devices:"), br(), br(), scrolling_list (-name => 'Switches', -default=> "NONE", -values => ['cs6a', 'cs7a', 'cs7b', 'cs8b', 'cs9a', 'c9b', 'csa' ], -multiple => 'true', -size => 7, ), p(submit('Submit'),reset('Reset')), b($selerror), end_form(),hr(), end_html(); } #

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  • How could I generate instances of an object randomly at the top of the screen and make them "fall"?

    - by Custard
    I am making a game in Flash CS4 (actionscript 3) and I would like to be able to make "copies" of an instance that would randomly appear at the top of the screen and fall. For example, multiple objects(that are the same one) are falling from the top of the screen continuously, starting at random X positions. (i think this would be considered Real-Time effect). P.S., please tell me if the information is insufficient for an answer, I couldn't think of much more to add to it. Thanks for your time and answers, -Custard

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  • Why would I use Dropbox *and* Git for my Emacs initialization file?

    - by Michiel Borkent
    I hear a lot of Emacs users have their init file under git version control and sync the git repository over Dropbox, when they run Emacs on multiple systems. Why would you use git in this situation exactly? Usually checking which system you're on and which things to load and set depending on that can happen in one and the same init file for all systems, right? So, isn't it simply enough to put your init file in a Dropbox directory and load that one directly from Emacs then?

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  • How should a Gnome applet store its configuration data?

    - by George Edison
    I have a Gnome applet written in Python. In order to save configuration data/settings, it creates a file ~/.appname. However, this prevents multiple instances of the applet from being added to the panel because each cannot have its own settings. How can I store the settings in a way that allows each instance to have its own unique settings? Update: I specifically want to know how to store settings per instance.

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  • MSI Parameter Inspection

    - by Ben Breen
    With a windows MSI file, is there a way to grab all the possible installation parameters in .NET code? I need to make a generic user interface to configure multiple MSI files not known until run-time – then install them together in one go.

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  • C99 variable length automatic array performance

    - by aaa
    Is there significant cpu/memory overhead associated with using automatic arrays with g++/Intel on 64-bit x86 linux platform? int function(int N) { double array[N]; overhead compared to allocating array before hand (assuming function is called multiple times) overhead compared to using new overhead compared to using malloc The range of N may be from 1kb to 16kb roughly, stack overrun is not a problem.

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  • Is HashMap in Java collision safe

    - by changed
    Hi I am developing a parser that needs to put key value pairs in hashmap. But a key can have multiple values which i can do in this way HashMap<String,ArrayList<String>> . But what happens if number of keys are very large and it start matching with other key's hashcode. Will that rewrite previous key's value ? thanks -devSunday

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  • jQuery javascript dynamic menus with mbMenu plugin

    - by lafoaug
    Im using the MbMenu jQuery plugin. http://plugins.jquery.com/project/mbMenu http://pupunzi.open-lab.com/2009/01/18/mbmenu/ I am probably being ridiculously stupid but I wish to have multiple menus on the same page, but not load them from external files (the html structure of the menu already exists on the page). To me the only place you define what menu is linked to the element you call buildMenu on is the 'template' construction which is a external file. Thanks.

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  • swing layout: vertical flow

    - by pstanton
    Hi All, What LayoutManager should I use to achieve a transposed version of FlowLayout? Essentially, I want a vertical list which occupies multiple columns if it can't fit all of it's components within one column. +------------------------+ | item 1 | | item 2 | | item 3 | | item 4 | | item 5 | | item 6 | | item 7 | | item 8 | +------------------------+ or +------------------------+ | item 1 item 7 | | item 2 item 8 | | item 3 | | item 4 | | item 5 | | item 6 | +------------------------+

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  • How to select item in jComboBox

    - by jtnire
    Hi folks, I have a jComboBox that I am populating with some objects. The objects are of a type which I have made myself, and include a String and an int. The object's toString method returns the String, which is displayed in the Combo Box. Now, I wish to select an item in the Combo Box with code. How do I do this? There are multiple items starting with the same letter Thanks

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  • Validation - Data Integrity

    - by Thomas
    A table can only store 10 records in a particular state, 10 users over 30 years for example, the others must be less than 30 years. It is a business rule and as such should be respected. How to ensure that state? Think: multiple users accessing this table.

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  • copy Word document contents without using clipboard (VBA)

    - by keftebub
    I was wondering how to avoid using Windows clipboard, when you want to "replicate" multiple sections of a Word document (using VBA in macros) Why to avoid? Because we're using Word on a server, in a multiuser environment (I know that it is officially frowned upon) Otherwise, this would be easily accomplished with Selection.Copy and Selection.Paste methods. Thanks.

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  • Best practice - Accessing preferences globally

    - by JK
    User preferences for my app is store in NSUserDefaults. This includes a "theme" preference, which needs to be accessed frequently by multiple classes. I would prefer not to call "[[NSUserDefaults standardUserDefaults] objectForKey:..." repeatedly as it makes for inconcise code and I assume will incur overhead. What is the preferred and most concise method for accessing preferences in any class?

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  • Watir question regarding select_list and reloading

    - by AJ
    I have a drop down with multiple options. Whenever you choose an option, the page reloads with data specific with that option. Currently I'm using select.list(:name, strg).set(value) and it does that part just fine, but it does not reload the page with the specific data. Anyone know how to help. When i watch it in action, it doesn't select the option either, but my logs show that it does.Thanks.

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  • 'goto' usage

    - by Landon
    I've long been under the impression that 'goto' should never be used if possible. While perusing libavcodec (which is written in C) the other day, I noticed multiple uses of it. Is it ever advantageous to use 'goto' in a language that supports loops and functions? If so, why?

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  • Using MSBuild, how to construct a dynamic string from iterating over files in an ItemGroup?

    - by RyBolt
    I need to create multiple /testcontainer: parameters to feed into a task that exec's MsTest. I have the following : <ItemGroup> <TestFiles Include="$(ProjectPath)\**\UnitTest.*.dll" /> </ItemGroup> for each match in TestFiles I would like to build a string like so: "/testcontainer:UnitTest.SomeLibrary1.dll" "/testcontainer:UnitTest.SomeLibrary2.dll" "/testcontainer:UnitTest.SomeLibrary3.dll" I am trying to use the internals of MSBuild without having to create a custom task, is this possible ? TIA

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  • JDBC Code Change From SQL Server to Oracle

    - by BeginnerAmongBeginners
    In the JDBC code, I have the following that is working with SQL Server: CallableStatement stmt = connection.prepareCall("{ call getName() }"); ResultSet rs = stmt.executeQuery(); if(rs != null) { while(rs.next()) { //do something with rs.getString("name") } } Multiple rows are returned for the above situation. I understand that the use of a cursor is required to loop through the table in Oracle, but is there any way to keep the above code the same and accomplish the same thing? Thanks in advance.

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  • Jquery return mulitple values in ajax call

    - by Scarface
    Hey guys quick question, I have a jquery post function that returns a response on success after the click of a div, however I would like to return multiple variables on success. Do I have to use JSON, and if so, is it possible to integrate it into the $.ajax function after success? Thanks in advance for your time. $.ajax({ type: "POST", data: "action=favorite&username=" + username + "&topic_id=" + topic_id + "&token=" + token, url: "favorite.php", success: function(response) { } });

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  • how can i make a dynamic drop down box in php?

    - by sebastian
    i need in an php file three drop down boxes or multiple select boxes. the entries from these boxes are in a mysql database. the single problem is that the entries in the thrid box depend on the second, and the entries in the second depend on the first. can someone help? know any examples?

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