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• Java and Different Types of Stacks

  - by Rarge

  Currently the only stack I know anything about is Vector, I normally use this in place of an array but I understand that there is other types of stacks and they all suit different jobs. The project I am currently working on requires me to be inserting objects in a certain position inside a stack, not always the front of the stack and I am under the impression that a Vector may not be the best class for this job. Could somebody please give me a brief description of the other types of stacks available to me with the Java language and their advantages and disadvantages? Are these names homogeneous? E.g. Are they only used in the Java language or are they used as general terms in Computer Science? Thank you

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• [PHP] - Lowering script memory usage in a "big" file creation

  - by Riccardo

  Hi there people, it looks like I'm facing a typical memory outage problem when using a PHP script. The script, originally developed by another person, serves as an XML sitemap creator, and on large websites uses quite a lot of memory. I thought that the problem was related due to an algorithm holding data in memory until the job was done, but digging into the code I have discovered that the script works in this way: open file in output (will contain XML sitemap entries) in the loop: ---- for each entry to be added in sitemap, do fwrite close file end Although there are no huge arrays or variables being kept in memory, this technique uses a lot of memory. I thought that maybe PHP was buffering under the hood the fwrites and "flushing" data at the end of the script, so I have modified the code to close and open the file every Nth record, but the memory usage is still the same.... I'm debugging the script on my computer and watching memory usage: while script execution runs, memory allocation grows. Is there a particular technique to instruct PHP to free unsed memory, to force flushing buffers if any? Thanks

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• Bash file - if then-

  - by user2949827

  I want to wright a login script for my organization, The script needs to discover users by Group id's and then define the map drive they need on their computer. I started writing down the script and it looks like this: ID if [gid=10524657] then mkdir /home/likewise-open/Domain/Username/Desktop/Share sudo mount.cifs //fs01/salesnew /home/likewise-open/Domain/Username/Desktop/share -o user=X else [gid=41654564] (etc....) That is the first time i am writing a script in Ubuntu, Can you tell me what am i doing wrong ? Is it possible for Linux to identify the gid from the ID command ? if not what is the alternative option? Can someone please advise ?

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• Put a program in the system tray at startup

  - by cosmo0

  Hi I followed the commonly-linked tip for reducing an application to the system tray : http://www.developer.com/net/csharp/article.php/3336751 Now it works, but there is still a problem : my application is shown when it starts ; I want it to start directly in the systray. I tried to minimize and hide it in the Load event, but it does nothing. Edit : I could, as a poster suggested, modify the shortcut properties, but I'd rather use code : I don't have complete control over every computer the soft is installed on. I don't want to remove it completely from everywhere except the systray, I just want it to start minimized. Any ideas ? Thanks

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• How to install the program depending on libstdc++ library

  - by Alex Farber

  My program is written in C++, using GCC on Ubuntu 9.10 64 bit. If depends on /usr/lib64/libstdc++.so.6 which actually points to /usr/lib64/libstdc++.so.6.0.13. Now I copy this program to virgin Ubuntu 7.04 system and try to run it. It doesn't run, as expected. Then I add to the program directory the following files: libstdc++.so.6.0.13 libstdc++.so.6 (links to libstdc++.so.6.0.13) and execute command: LD_LIBRARY_PATH=. ./myprogram Now everything is OK. The question: how can I write installation script for such program? myprogram file itself should be placed to /usr/local/bin. What can I do with dependencies? For example, on destination computer, /usr/lib64/libstdc++.so.6 link points to /usr/lib64/libstdc++.so.6.0.8. What can I do with this? Note: the program is closed-source, I cannot provide source code and makefile.

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• Control webcam from C#

  - by Moulde

  Hi I have a Creative Life CAM Optia AF webcam, the software included in the package is able to control the camera in different ways, like set autofocus to auto or manual, and a bunch of gamma and brightness settings. I'm capturing the feed with the AForge Computer vision library, and it's working great. But i would like to be able to set the manual focus from inside my application. Ive been searching for a tutorial, but come up empty handed. Can i somehow either disassemble the included software, or is there some way to fetch the traffic / instructions being sent to the device? Thanks in advance.

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• Discovering the default gateway without DHCP

  - by JavaRocky

  A crazy question, but is there anyway to discover the default gateway without DHCP? This would be for a device on a network which does not use DHCP which does not have an IP address as yet. I was thinking if I could discover the default gateway, then i could try to guess an unused ip address then broadcast on the network to see if it's being used. I may be asking for trouble i understand. E.g. if there is already a computer which has a static IP and is shutdown.

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• Does cache absolute expiration guarantee that the cache is eliminated at the exact time?

  - by Fabio Milheiro

  I am using the HttpRuntime cache to store lists of objects and in our current project it was specified that the objects should be cached until midnight, so I am using DateTime.Today.AddHours(24) in order to set the absolute expiration date to midnight. For example, if today is May 26th, the absolute expiration time will be set to May 27th 0:00. But somehow, when I change the clock of my computer, the objects are still in cache. Should I wait a little (the CacheItemPriority is set to Normal)? Am I forgetting something? Thank you

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• Accessing contents of a file in a web-application without uploading.

  - by UniCoder

  As far as I can tell, it is impossible to access the content of files on the user's computer in a web application without first uploading to the server, then re-downloading to user, unless some sort of plug-in is used. (Flash, etc.) Ideally, the user would upload the file directly to localstorage and then scripts would have a chance to process/display/validate/filter without the user having to wait on an upload. Are there any features in upcoming web standards such as html5 that will allow this? If not, why has there been no effort to make this possible, and how can I work around it without getting stuck with plugins?

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• How to run a program in python?

  - by Luka Mihaldinec

  this is my code. I'm trying to make a script which would run an .exe file from my computer. And this one isn't working :/ I think I'm using the wrong command.. I tried all the other commands like import os, os.startfile, but they won't work too. I think my code is just wrong :P loop=0 while loop==0: answer=raw_input("coded by: Narralol\n\n" "Pick a task:\n" "1) Start Minecraft.exe\n" "2) Start Minecraft_Server.jar\n" "3) Backup your server\n" "4) Copy the backup to your desktop\n" "5) Exit\n") if answer==1: execfile('D:\Games\Minecraft\Minecraft.exe') elif answer==2: execfile('D:\Games\Minecraft\Minecraft_server.jar') elif answer==5: loop=1

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• Just an experiment changing the application data path

  - by Arthur

  When I change the Appication Data path in windows xp registry to a network folder I get this error message on the next system startup: "windows cannot load the user's profile but has logged you with the default profile system" The registry keys are: "[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]" "[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders]" under the names "AppData" and "Local AppData" I dont care if "Windows logins you with the default profile system" but is there a way to disable that message, or change the message timeout form 30 seconds to 0?,or maybe create an script that changes the Application Data path every system startup? P.S. The computer with the shared folder is always on.

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• How to open connection to local network path protected by password in smart way? (Whith C#)

  - by lfx

  Hi, I developing program witch have to write some data in file whom are stored in network computer witch are protected by password. Now I'm doing this way - open connection with cmd then write data. static bool ConnectToSrv() { String myUser = "domain.local\\user"; String myPass = "pwd"; String cmdString = "net use \\\\otherPC\\folder\\ /user:" + myUser + " " + myPass; try { ManagementClass processClass = new ManagementClass("Win32_Process"); object[] methodArgs = { cmdString, null, null, 0 }; object result = processClass.InvokeMethod("Create", methodArgs); return true; } catch (System.Exception error) { return false; } } public void writeDate(string data){ } I believe there must by better way. I mean the .NET way. Does anybody know how to do it? :) Thanks

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• Cookie is setting twice (dublicated)

  - by Erik Larsson

  I'm new to cookies, and im trying to set a cookie where to store the referer (the org ref). But when i try this function: function do_it_cookie() { // Check if cookie exists if (isset($_COOKIE['ref'])) { // It dose exist, do nothing or anything... } else { setcookie ('ref', $_SERVER['HTTP_REFERER'], time() + 60, '/'); header ("Location: http://www.nyttforetag.com/mind-your-own-business/"); } } I want to store the cookie on the user computer for 30 days, if the return i want to know the initial refereeing url. But when i use this and lets say i go to another page in my site and then go back to the homepage its sets a new cookie with the exact same name and with the ref of the previous page. Is there away to avoid this?

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• Find location of current m-file in Matlab

  - by Jordi

  I'm working on my Matlab code in a number of different locations and it would really help if I could make the code aware of its location on the computer. I think there is a function that gives me exactly this information, but I can't remember what it is called or find it on Google. The idea is that I have a function myFunc that needs a file in its own directory, which can be in different locations on different computers. So in myFunc I want to do something like this: dir = theFunctionImLookingFor; system(fullfile(dir, 'someApp.exe')); (it could also be that the function I'm looking for doesn't return the directory, but the directory + m-file name, but that makes little difference to me) Thanks for any help!

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• mac, java 1.5: javax.mail not recognized as a jar file

  - by Helpme

  hello fellow java developers, Having a little issue with creating a java application on a macintosh computer (snow leopard). I've set up my application in eclipse, added all of the appropriate jar files, but for some reason the code is not recognizing some of my variables as valid types. I've imported the libraries via import javax.mail.*; import javax.mail.internet.*; These libraries are not recognized by the application. BUT I've put them on the build path! Any advice on how to fix this?

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• Iphone SDK on Windows (alternative solutions)

  - by Cyclone

  I know there is no official SDK for windows, which is very annoying. Is there any way to develop applications on a windows computer, other than somehow running a mac os in vmware? I know you can do it with Xcode, but that is also only for macs. Google searches have revealed absolutely nothing...... If I cannot use the SDK or Xcode, any way I can just check syntax or something and just make my code in Notepad and save it with the proper extension? I have no idea whether or not I would be able to do that, probably because I have never even tried the SDK and probably never will without buying a mac.

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• Is it better to adopt the same technologies used at work to be effective on your home projects ?

  - by systempuntoout

  Is it better to start developing an home project using the same technologies used at work to be more productive and effective? I'm not talking about a simple hello world web page but an home project with all bells and whistles that one day, maybe, you could sell on internet. This dilemma is often subject of flames between me and a friend. He thinks that if you want to make a great home-made project you need to use the same technologies used daily at work staying in the same scope too; for example, a c++ computer game programmer should develope an home-made c++ game. I'm pretty sure that developing using the same technologies used at work can be more productive at beginning, but surely less exciting and stimulating of working with other languages\ides\libraries out of your daily job. What's your opinion about that?

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• Conventional Approaches for Passing Data to Back-End?

  - by Calvin

  Hi guys, I'm fairly new to web development, so please pardon the painfully newbie question that's about to follow. My computer science class group and I are developing a web application for class, which is built in Python (under Django) and uses jQuery on the front end. It's primarily an AJAX-ified application, and passing data from the backend to the front end is done through AJAX calls to specific URLs which return JSON. This is probably a stupid question, but what's the conventional approach for passing data in the opposite direction? We don't want to reload the page or anything, so is it an AJAX pass going the other way or something? Thanks in advance for your help!

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• The easiest way to draw an image?

  - by Benno

  Assume you want to read an image file in a common file format from the hard drive, change the color of one pixel, and display the resulting image to the screen, in C++. Which (open-source) libraries would you recommend to accomplish the above with the least amount of code? Alternatively, which libraries would do the above in the most elegant way possible? A bit of background: I have been reading a lot of computer graphics literature recently, and there are lots of relatively easy, pixel-based algorithms which I'd like to implement. However, while the algorithm itself would usually be straightforward to implement, the necessary amount of frame-work to manipulate an image on a per-pixel basis and display the result stopped me from doing it.

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• Cookie Value not available, why?

  - by Camran

  I have tested this on my development computer, but now I have uploaded everything to the production server and I cant read out the value of the cookie. I think the problem lies in the Serialization and Unserialization. if (isset($_COOKIE['watched_ads'])){ $expir = time()+1728000; //20 days $ad_arr = unserialize($_COOKIE['watched_ads']); // HERE IS THE PROBLEM $arr_elem = count($ad_arr); if (in_array($ad_id, $ad_arr) == FALSE){ if ($arr_elem>10){ array_shift($ad_arr); } $ad_arr[]=$ad_id; setcookie('watched_ads', serialize($ad_arr), $expir, '/'); } } When I echo this: count($ad_arr) I receive the expected nr, 1 in this case, so there is a value there. But when I echo the value: echo $ad_arr[0]; I get nothing. Completely blank. No text at all. Anybody have a clue? if you need more info about something let me know...

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• Upload image with Tumblr API in PHP

  - by John

  I'm having trouble uploading a photo from my computer to tumblr using their API. http://www.tumblr.com/docs/en/api photo - Requires either source or data, but not both. If both are specified, source is used. * source - The URL of the photo to copy. This must be a web-accessible URL, not a local file or intranet location. * data - An image file. See File uploads below. * caption (optional, HTML allowed) * click-through-url (optional) I need to use data File uploads can be done in a data parameter where specified above. You may use either of the common encoding methods: multipart/form-data method, like a file upload box in a web form. Maximum size: o 50 MB for videos o 10 MB for photos o 10 MB for audio I would post my code but it's not showing up correctly for me.

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• Cant get Tomcat6.0 to work with Windows 7 Environment

  - by CitadelCSCadet

  Prior to upgrading to windows 7, I was able to use Tomcat 6.0, but when I upgraded to the new Windows, and downloaded Eclipse EE, and downloaded the apache content, I am unable to get Apache to run. When I attempt to start my apacher server through either system tray, or even windows services, it gives the followign error screen. "Windows could not start the Apache Tomcat 6 on local computer. For more information review the system event log. Refer to server specific error code 0." I have been able to locate some forums about error code 0, and some other documentation on this problem, but none of the solutions seems to work. One of the solutions I came across said to take the msvcr71.dll (mscvrt.dll on new platforms) and put it into the bin folder of apache. This also did not work. Does anybody know a fix for this problem, or a way to get around it so I can get my server up and running thanks.

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• help with installing clamav for remote apache server vs WAMP localserver

  - by Scarface

  Hey guys, I have never installed an extension before so I am not really sure where to start. I want to do 2 things: install clamav virus scanner http://sourceforge.net/projects/php-clamav/ on my remote server which is a linux apache setup using cpanel as a gui. install clamav on my localserver on my home computer which operates on windows and has WAMP server installed for server-side activity What is the difference between the two installation methods? What is required for each installation? If anyone can point me in the right direction in any way, I would really appreciate it. Even if it is just an article or tutorial on how to get started.

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• Is it possible to make a video download panel for Chrome ( using NPAPI to catch media stream)

  - by user359278

  Hi guys. I'm trying to make a media Download bar for Chrome Browser like Real Player's one ( a DLL plugin ): Whenever you open a web-page which contents "media stream" like Youtube..., it will show a download bar at the left-top corner of the flash player - allow you to download this video/song to your computer. I know it use NPAPI to catch the media stream but how? Which method do I have to use? Is there any document for me? I have never worked on a NPAPI-project before. Thanks in advance and so sorry for bad English.

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• How to add .Net3.5 dll into .Net2.0 project?

  - by macias

  I have a dll which is based on .net 3.5 -- it uses internally for example Linq, but the exposed API is straightforward, no fancy stuff. Since C# generics are resolved at compile time I assume that for calling party all it counts is API (all public parts). However when I try to use this dll from net2.0 project I get info, that the dll cannot be referenced because the dll or one of its dependencies requires a later version of .net framework. I can install any .net version I want on target computer (when entire app is installed), but I cannot change .net version for the project itself. So: how to solve this? When adding a C dll to this project I had no such problems, so are C# dlls self-contained or not?

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