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• Getting error while installing mod_wsgi in centos

  - by user825904

  I have reinstalled python with enable shared [root@master mod_wsgi-3.4]# make clean rm -rf .libs rm -f mod_wsgi.o mod_wsgi.la mod_wsgi.lo mod_wsgi.slo mod_wsgi.loT rm -f config.log config.status rm -rf autom4te.cache [root@master mod_wsgi-3.4]# LD_RUN_PATH=/usr/local/lib make apxs -c -I/usr/local/include/python2.7 -DNDEBUG mod_wsgi.c -L/usr/local/lib -L/usr/local/lib/python2.7/config -lpython2.7 -lpthread -ldl -lutil -lm /usr/lib64/apr-1/build/libtool --silent --mode=compile gcc -prefer-pic -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -Wformat-security -fno-strict-aliasing -DLINUX=2 -D_REENTRANT -D_GNU_SOURCE -pthread -I/usr/include/httpd -I/usr/include/apr-1 -I/usr/include/apr-1 -I/usr/local/include/python2.7 -DNDEBUG -c -o mod_wsgi.lo mod_wsgi.c && touch mod_wsgi.slo In file included from /usr/local/include/python2.7/Python.h:8, from mod_wsgi.c:142: /usr/local/include/python2.7/pyconfig.h:1161:1: warning: "_POSIX_C_SOURCE" redefined In file included from /usr/include/sys/types.h:26, from /usr/include/apr-1/apr-x86_64.h:127, from /usr/include/apr-1/apr.h:19, from /usr/include/httpd/ap_config.h:25, from /usr/include/httpd/httpd.h:43, from mod_wsgi.c:34: /usr/include/features.h:162:1: warning: this is the location of the previous definition In file included from /usr/local/include/python2.7/Python.h:8, from mod_wsgi.c:142: /usr/local/include/python2.7/pyconfig.h:1183:1: warning: "_XOPEN_SOURCE" redefined In file included from /usr/include/sys/types.h:26, from /usr/include/apr-1/apr-x86_64.h:127, from /usr/include/apr-1/apr.h:19, from /usr/include/httpd/ap_config.h:25, from /usr/include/httpd/httpd.h:43, from mod_wsgi.c:34: /usr/include/features.h:164:1: warning: this is the location of the previous definition mod_wsgi.c: In function ‘wsgi_server_group’: mod_wsgi.c:991: warning: unused variable ‘value’ mod_wsgi.c: In function ‘Log_isatty’: mod_wsgi.c:1665: warning: unused variable ‘result’ mod_wsgi.c: In function ‘Log_writelines’: mod_wsgi.c:1802: warning: unused variable ‘msg’ mod_wsgi.c: In function ‘Adapter_output’: mod_wsgi.c:3087: warning: unused variable ‘n’ mod_wsgi.c: In function ‘Adapter_file_wrapper’: mod_wsgi.c:4138: warning: unused variable ‘result’ mod_wsgi.c: In function ‘wsgi_python_term’: mod_wsgi.c:5850: warning: unused variable ‘tstate’ mod_wsgi.c:5849: warning: unused variable ‘interp’ mod_wsgi.c: In function ‘wsgi_python_child_init’: mod_wsgi.c:7050: warning: unused variable ‘l’ mod_wsgi.c:6948: warning: unused variable ‘interp’ mod_wsgi.c: In function ‘wsgi_add_import_script’: mod_wsgi.c:7701: warning: unused variable ‘error’ mod_wsgi.c: In function ‘wsgi_add_handler_script’: mod_wsgi.c:8179: warning: unused variable ‘dconfig’ mod_wsgi.c:8178: warning: unused variable ‘sconfig’ mod_wsgi.c: In function ‘wsgi_hook_handler’: mod_wsgi.c:9375: warning: suggest parentheses around assignment used as truth value mod_wsgi.c:9377: warning: suggest parentheses around assignment used as truth value mod_wsgi.c:9379: warning: suggest parentheses around assignment used as truth value mod_wsgi.c:9383: warning: suggest parentheses around assignment used as truth value mod_wsgi.c:9403: warning: suggest parentheses around assignment used as truth value mod_wsgi.c:9405: warning: suggest parentheses around assignment used as truth value mod_wsgi.c:9408: warning: suggest parentheses around assignment used as truth value mod_wsgi.c: In function ‘wsgi_daemon_worker’: mod_wsgi.c:10819: warning: unused variable ‘duration’ mod_wsgi.c:10818: warning: unused variable ‘start’ mod_wsgi.c: In function ‘wsgi_hook_daemon_handler’: mod_wsgi.c:13172: warning: unused variable ‘i’ mod_wsgi.c:13170: warning: unused variable ‘elts’ mod_wsgi.c:13169: warning: unused variable ‘head’ mod_wsgi.c: At top level: mod_wsgi.c:8142: warning: ‘wsgi_set_user_authoritative’ defined but not used mod_wsgi.c:15251: warning: ‘wsgi_hook_check_user_id’ defined but not used /usr/lib64/apr-1/build/libtool --silent --mode=link gcc -o mod_wsgi.la -rpath /usr/lib64/httpd/modules -module -avoid-version mod_wsgi.lo -L/usr/local/lib -L/usr/local/lib/python2.7/config -lpython2.7 -lpthread -ldl -lutil -lm

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• Doubts regarding the behaviour of 'autoremove' command and '--auto-remove' flag

  - by Jasper Loy

  After reading several man pages and forums, I thought that running 'apt-get autoremove' without any following argument removes all unused dependencies left on the system, while running 'apt-get autoremove xxx' removes xxx together with its unused dependencies. However I found this to be not true. Running 'apt-get autoremove xxx' not only removes xxx together with its unused dependencies, it also removes all other unused dependencies. So I tried to run 'apt-get remove --auto-remove xxx', thinking that this would remove only xxx and its unused dependencies. To my surprise, this also removed xxx, its unused dependencies and all other unused dependencies. Is this the intended behaviour of the commands or a bug? Is there any quick way to remove xxx and its unused dependencies without removing other unused dependencies?

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• Wildcard DNS, VirtualHosts on apache2, 404 for unused subdomains

  - by niel

  On an Apache2 server linked to by a DNS that includes a wildcard entry, e.g. *.example.com, subdomains that are not defined as ServerNames in any VirtualHosts point to the first defined VirtualHost, in my example this is 000-default. My Question:How would one get unused subdomains (subdomains not used in any virtualhosts) to return a 404 error to the requesting client? This must preferably show in server logs as a 404 as well. I have looked into the following possibilities: Redirecting any invalid subdomain to the home page or some other page.The problem with this method is, when someone links to your site as this.company.sucks.example.com, the client will see your home page or in my case 000-default if I do not redirect. Thanks, to Mike for pointing this out. (regex for "suck", etc definately not an option) Let the default VirtualHost point to a non-existent directory.Apache does not like this one bit, warning with every reload. Beyond the warning, everything seems fine. This seems like a hack. Does this seem like a problem (however small) to anyone? Point the default VirtualHost to a folder where the index.php is forbidden, thus creating a 403 status code.This is confusing and makes things like the following overly complicated: Say, for example, you use a subdomain per user (a big reason to use wildcard DNS, apparently), and users have the ability to view each others profiles at username.example.com. This solution is confusing to the user and completely not what I want to do. My ideal sollution will let the user know there is nothing to view at the url he entered. Preferably with a 404 and an error log entry for the address entered (not some other address). Any help would be greatly appreciated!

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• Removing unused local variables from .NET code

  - by Jesse

  Is there a tool available that can scan a C# or VB.NET project and automatically remove all unused local variables?

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• casting unused return values to void

  - by markh44

  int fn(); void whatever() { (void) fn(); } Is there any reason for casting an unused return value to void, or am I right in thinking it's a complete waste of time? Follow up: Well that seems pretty comprehensive. I suppose it's better than commenting an unused return value since self documenting code is better than comments. Personally, I'll turn these warnings off since it's unnecessary noise. I'll eat my words if a bug escapes because of it...

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• unused memory using 32 bit integer in C

  - by endmade

  I have the folowing struct of integers (32 bit environment): struct rgb { int r; int g; int b; }; Am I correct in saying that, since rgb component values (0-255) only require 8-bits(1 byte) to be represented, I am only using 1 byte of memory and leaving 3 bytes unused for each component? Also, if I instead did the following: struct rgb{ unsigned int r:8; unsigned int g:8; unsigned int b:8; }; Assuming that what I said above is correct, would using this new struct reduce the number of unused bytes to 1?

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• Understading the output of syslogd -d

  - by Heoa

  What is the meanding of 80, F and X in the following output of syslogd -d? 0: X X X X FF X X X X X FF X X X X X X X X X X X X X X FILE: /var/log/auth.log (unused) 1: FF FF FF FF X FF FF FF FF FF X FF FF FF FF FF FF FF FF FF FF FF FF FF FF FILE: /var/log/syslog (unused) 2: X X X FF X X X X X X X X X X X X X X X X X X X X X FILE: /var/log/daemon.log (unused) 3: FF X X X X X X X X X X X X X X X X X X X X X X X X FILE: /var/log/kern.log (unused) 4: X X X X X X FF X X X X X X X X X X X X X X X X X X FILE: /var/log/lpr.log (unused) 5: X X FF X X X X X X X X X X X X X X X X X X X X X X FILE: /var/log/mail.log (unused) 6: X FF X X X X X X X X X X X X X X X X X X X X X X X FILE: /var/log/user.log (unused) 7: X X 7F X X X X X X X X X X X X X X X X X X X X X X FILE: /var/log/mail.info (unused) 8: X X 1F X X X X X X X X X X X X X X X X X X X X X X FILE: /var/log/mail.warn (unused) 9: X X F X X X X X X X X X X X X X X X X X X X X X X FILE: /var/log/mail.err (unused) 10: X X X X X X X 7 X X X X X X X X X X X X X X X X X FILE: /var/log/news/news.crit (unused) 11: X X X X X X X F X X X X X X X X X X X X X X X X X FILE: /var/log/news/news.err (unused) 12: X X X X X X X 3F X X X X X X X X X X X X X X X X X FILE: /var/log/news/news.notice (unused) 13: 80 80 X 80 X 80 80 X 80 80 X 80 80 80 80 80 80 80 80 80 80 80 80 80 80 FILE: /var/log/debug (unused) 14: 70 70 X X X 70 70 X 70 X X 70 70 70 70 70 70 70 70 70 70 70 70 70 70 FILE: /var/log/messages (unused) 15: 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 WALL: 16: F0 F0 FF FF F0 F0 F0 FF F0 F0 F0 F0 F0 F0 F0 F0 F0 F0 F0 F0 F0 F0 F0 F0 F0 PIPE: |/dev/xconsole (unused)

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• my window's handle is unused and cannot be evaluated

  - by numerical25

  I am trying to encapsulate my Win32 application into a class. My problem occurs when trying to initiate my primary window for the application below is my declaration and implementation... I notice the issue within my class method InitInstance(); declaration #pragma once #include "stdafx.h" #include "resource.h" #define MAX_LOADSTRING 100 class RenderEngine { protected: int m_width; int m_height; ATOM RegisterEngineClass(); public: static HINSTANCE m_hInst; HWND m_hWnd; int m_nCmdShow; TCHAR m_szTitle[MAX_LOADSTRING]; // The title bar text TCHAR m_szWindowClass[MAX_LOADSTRING]; // the main window class name bool InitWindow(); bool InitDirectX(); bool InitInstance(); //static functions static LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam); static INT_PTR CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam); int Run(); }; implementation #include "stdafx.h" #include "RenderEngine.h" HINSTANCE RenderEngine::m_hInst = NULL; bool RenderEngine::InitWindow() { RenderEngine::m_hInst = NULL; // Initialize global strings LoadString(m_hInst, IDS_APP_TITLE, m_szTitle, MAX_LOADSTRING); LoadString(m_hInst, IDC_RENDERENGINE, m_szWindowClass, MAX_LOADSTRING); if(!RegisterEngineClass()) { return false; } if(!InitInstance()) { return false; } return true; } ATOM RenderEngine::RegisterEngineClass() { WNDCLASSEX wcex; wcex.cbSize = sizeof(WNDCLASSEX); wcex.style = CS_HREDRAW | CS_VREDRAW; wcex.lpfnWndProc = RenderEngine::WndProc; wcex.cbClsExtra = 0; wcex.cbWndExtra = 0; wcex.hInstance = m_hInst; wcex.hIcon = LoadIcon(m_hInst, MAKEINTRESOURCE(IDI_RENDERENGINE)); wcex.hCursor = LoadCursor(NULL, IDC_ARROW); wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1); wcex.lpszMenuName = MAKEINTRESOURCE(IDC_RENDERENGINE); wcex.lpszClassName = m_szWindowClass; wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL)); return RegisterClassEx(&wcex); } LRESULT CALLBACK RenderEngine::WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) { int wmId, wmEvent; PAINTSTRUCT ps; HDC hdc; switch (message) { case WM_COMMAND: wmId = LOWORD(wParam); wmEvent = HIWORD(wParam); // Parse the menu selections: switch (wmId) { case IDM_ABOUT: DialogBox(m_hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About); break; case IDM_EXIT: DestroyWindow(hWnd); break; default: return DefWindowProc(hWnd, message, wParam, lParam); } break; case WM_PAINT: hdc = BeginPaint(hWnd, &ps); // TODO: Add any drawing code here... EndPaint(hWnd, &ps); break; case WM_DESTROY: PostQuitMessage(0); break; default: return DefWindowProc(hWnd, message, wParam, lParam); } return 0; } bool RenderEngine::InitInstance() { m_hWnd = NULL;// When I step into my code it says on this line 0x000000 unused = ??? expression cannot be evaluated m_hWnd = CreateWindow(m_szWindowClass, m_szTitle, WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, m_hInst, NULL); if (!m_hWnd)// At this point, memory has been allocated unused = ??. It steps over this { return FALSE; } if(!ShowWindow(m_hWnd, m_nCmdShow))// m_nCmdShow = 1 and m_hWnd is still unused and expression {//Still cannot be evaluated. This statement is true. and shuts down. return false; } UpdateWindow(m_hWnd); return true; } // Message handler for about box. INT_PTR CALLBACK RenderEngine::About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam) { UNREFERENCED_PARAMETER(lParam); switch (message) { case WM_INITDIALOG: return (INT_PTR)TRUE; case WM_COMMAND: if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL) { EndDialog(hDlg, LOWORD(wParam)); return (INT_PTR)TRUE; } break; } return (INT_PTR)FALSE; } int RenderEngine::Run() { MSG msg; HACCEL hAccelTable; hAccelTable = LoadAccelerators(m_hInst, MAKEINTRESOURCE(IDC_RENDERENGINE)); // Main message loop: while (GetMessage(&msg, NULL, 0, 0)) { if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg)) { TranslateMessage(&msg); DispatchMessage(&msg); } } return (int) msg.wParam; } and my winMain function that calls the class // RenderEngine.cpp : Defines the entry point for the application. #include "stdafx.h" #include "RenderEngine.h" // Global Variables: RenderEngine go; int APIENTRY _tWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCmdLine, int nCmdShow) { UNREFERENCED_PARAMETER(hPrevInstance); UNREFERENCED_PARAMETER(lpCmdLine); // TODO: Place code here. RenderEngine::m_hInst = hInstance; go.m_nCmdShow = nCmdShow; if(!go.InitWindow()) { return 0; } go.Run(); return 0; }

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• Invalidating unused ssh keys

  - by JH

  I am using one ssh account for all my Subversion users. They send me their public keys and I put them in .ssh/authorized_key of the svn account, then they can check out the code from Subversion using ssh tunnel. So far everything works fine. The problem though is that I want to invalidate keys that have not been used for some time (say one month). Does anyone know a way to make sshd log the public key when a user signs in? Thanks.

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• Cleaning Up Unused Users and Groups (Ubuntu 10.10 Server)

  - by PhpMyCoder

  Hello experts, I'm very much a beginner when it comes to Ubuntu and I've been learning the ropes by diving in and writing a (backend-language independent) web app framework that relies on apache, some clever mod_rewrites, Ubuntu permissions, groups, and users. One thing that really annoys my inner clean-freak is that there are loads of users and groups that are created when Ubuntu is installed that are never used (Or so I think). Since I'm just running a simple web app server, I would like to know: What users/groups can I remove? Since you'll probably ask for it...here's a list of all the users on my box (excluding the ones I know that I need): root daemon bin sys sync man lp mail uucp proxy backup list irc gnats nobody libuuid syslog And a list of all of the groups: root daemon bin sys adm tty disk lp mail uucp man proxy kmem dialout fax voice cdrom floppy tape sudo audio dip backup operator list irc src gnats shadow utmp video sasl plugdev users nogroup libuuid crontab syslog fuse mlocate ssl-cert lpadmin sambashare admin

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• Trying to find the life expectancy of an unused flash card like SD

  - by wsams

  I read in the What's the life expectancy of an SD card? post SD cards are rated to hold data at something like 10 years sitting idle. I recall reading (not sure where) about re-energizing cards by occasionally inserting into a reader. Everything I read rates in read/write cycles and not physical decay. I'm wonder if buying a new sd card for every photo shoot would be beneficial if I could store the cards in a lock box? I was hoping for something much longer. Does anyone else agree with 10 years or maybe something more?

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• Static IPv6 address in Windows unused for outgoing connections

  - by Luc

  I'm running a Windows server and trying to get it to use a static IPv6 address for outgoing connections to other IPv6 hosts (such as Gmail). I need this because Gmail requires a ptr record, and I can't set one for random addresses. The static address is configured on the host, but it also has a temporary privacy address as well as a random address from the router it seems. By default Windows uses the privacy address; it seems this is the expected behavior (and it makes perfect sense for people/users that did not set a static address, but I did!). I've tried disabling the privacy address with: netsh int ipv6 set privacy disabled This indeed gets rid of the privacy address, but I still have the random address that the router assigned. To disable this, it was said I needed to disable "router discovery" using this command: net interface ipv6 set interface 14 routerdiscovery=disabled Upon doing this, all IPv6 connectivity is lost. If I do this while pinging Gmail, it will report "Destination host unreachable" as soon as I enter the command. In the static IPv6 configuration, I did configure the default gateway and prefix length, so I don't see why it's unable to connect. Probably has something to do with the lack of ARP in IPv6 and somehow being unable to resolve the router's MAC, but I wouldn't know how to fix this. Finally I've tried disabling the DHCPv6 lease with these commands: netsh interface ipv6 set interface "IDMZ Team" managedaddress=disabled netsh interface ipv6 set interface "IDMZ Team" otherstateful=disabled Which was to no avail; the host continues to obtain and use the router-assigned IPv6 address. The router is a FritzBox 7340, which shows me all the IPv4 and IPv6 addresses that the host (identified by MAC) utilizes, but I'm unable to change the assigned address. Maybe this could be done over the telnet interface of the router somehow, but again, I wouldn't know how to do this even if it's the way to go. In short, any of the following would probably solve my problem: Change Windows' source address selection behavior. Have Windows not get an address from the router and not generate a privacy address; Have the router hand out a static address and make Windows use that as source address. Recover connectivity after disabling router discovery on Windows. Alternatively I might use some (batch, perl, ...) script to throw away all IPv6 addresses except the desired one, but this feels rather hacky. If it's the only way (or less hacky than another hacky solution), it might be an option though. Thanks!

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• deleting old unused images

  - by Ayyash

  As we move on with our content-based websites, lots of images get dumped in our images folder, but we rarely come across self-committed monkyes that delete their files once they do not need it, which means, we end up with a huge list of images in one folder, and it is very tricky to clean it up. My question is (and i dont know if this is the right website to ask it), is there a tool that allows me to find out if an image has been requested by web in the last (n) months? my other general question is, how do you do it? how do you take control of your images folders? what policy do you enforce on developers to clean up? what measures do you take in order to decide what goes and what stays if you end up with an out-of-control situation? my suggestion was to rename the images folder, create a new one, copy the basic ones and wait for someone to complain about a broken image! :) i find this to be the most efficient.

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• RabbitMQ message broker unable to open unused port 61613

  - by mjn

  On a Windows Vista system, RabbitMQ fails to open port 61613 which is not used (as netstat and TCPView show). The server log indicates that it is possible to bind port 5672, but the next lines show the problem with port 61613. I have cleared all firewall settings and rebooted. Several times in the past this helped to solve the problem. But as the problem frequently reappears, I would like to know if there is somthing I am missing to solve its root cause. =INFO REPORT==== 29-Jun-2013::12:09:16 === started TCP Listener on [::]:5672 =INFO REPORT==== 29-Jun-2013::12:09:16 === started TCP Listener on 0.0.0.0:5672 =INFO REPORT==== 29-Jun-2013::12:09:16 === rabbit_stomp: default user 'guest' enabled =INFO REPORT==== 29-Jun-2013::12:09:16 === started STOMP TCP Listener on [::]:61613 =ERROR REPORT==== 29-Jun-2013::12:09:16 === failed to start STOMP TCP Listener on 0.0.0.0:61613 - eacces (permission denied) =INFO REPORT==== 29-Jun-2013::12:09:16 === stopped STOMP TCP Listener on [::]:61613

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• Removing unused profiles from Windows network connections

  - by Shiki

  Can't figure this one out. When you connect to a wireless network (like an ad-hoc), it'll create a networkname 1 connection. After something changes, it makes a networkname 2 connection. And this goes on and on. Now I'm at connection ~23, at the home connection I'm at ~2 and ~5. Is there a way to clean these out? Couldn't find where Win stores such profiles.

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• Finding unused views/partials in Ruby on Rails

  - by ujh

  I'm currently working on a largish Ruby on Rails project. It's old enough and big enough that it's not clear if all views are actually in use. Is there any script/plugin out there that can generate a list of unused view files?

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• Cleaning Sencha Touch project from unused folders

  - by Software developer

  I created a sencha touch 2.0 project using command line $ sencha generate app GS ../GS The sencha project has an sdk folder which contains many folders I developed an application and tried it on a browser.. Now I want to install it on Android mobile using Phonegap 1.8. The problem is that the project is too big and the emulator shows that there is no space on the devive My question is how can I clean the project from unused folders, specially the ones in sdk directory?

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• Find unused import statements in Java source

  - by curiousmind

  Does anyone know of a tool (besides Eclipse or any other IDE) that I can use to find unused imports in a Java source file? I am looking for a command-line type of tool (to integrate in a larger script). Thank you.

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• How to delete drupal's unused core modules correctly?

  - by vegatron

  Hi I want to delete the unused drupal modules like ( blog, Forum, taxonomy ...) but I'm worried if I delete the modules from the modules directory I might cause an error (now or in the future) . is it safe? and if I deleted the corresponding tables what will happen? the reason for this is because I want to deliver the site to my client, and teach him how to use the admin page, but I want to make as easy as possible for him..

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• Tools for finding unused references

  - by Lawrence Johnston

  Are there any good tools or tricks for determining if there are any referenced but unused dependencies (such as dlls) in a project? My specific case is C# .net3.5.

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• Are unused CSS images downloaded?

  - by Alex

  Are unused CSS images downloaded by the browser or ignored? Eg. in CSS rules which don't match any elements. .nothingHasThisClass{background:url(hugefile.png);} Or would this be browser-dependant?

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• Is removing unused functionality a bad thing?

  - by Andrew Grimm

  Is it possible for YAGNI to apply in the past tense? You created some functionality, it was used a little bit a while ago, but you aren't using it any more, and you don't want to maintain it, so you'd rather delete it. Is getting rid of unused or rarely-used functionality neccessarily a bad thing? Background: I use source control, so if I need the functionality again, I can get it. I'm the only user of my software (I'm a bioinformatician analyzing a data set). One scenario where I came across this was that I was using inheritance, with a parent class, and two child classes. One was handling files generated by 454 sequencing (next-generation sequencing), and the other was handling files generated by Sanger sequencing (previous-generation sequencing). I was actively maintaining the latter, but not the former. Maybe my mistake was using inheritance rather than composition, but that's a slightly different story.

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• Identifying PHP unused variables (in Emacs)?

  - by Roberto Aloi

  Is it somehow possible to identify unused variables in a PHP file in Emacs? With other languages, this is possible by using tools such as flymake. I've already enabled Flymake to show syntax errors for my PHP files on the fly, but still it's frustrating that PHP logic errors are sometimes due to situations like: <?php $foo = whatever(); $bar = something($fo); ... Note the typo on $foo that will contribute to the developer's headache and to his exorbitant use of coffee.

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• Removing unused selectors in a CSS stylesheet?

  - by Legend

  I've been developing a web app for a few weeks now and ended up with about a 1000 lines. I am sure not all the selectors are being used and am trying to clean it up. At the same time, I don't want to do it manually for obvious reasons. Is there a safe and an efficient way to remove unused selectors? For this, am I supposed to navigate the entire website to let it know which selectors are not being used? (I use javascript to add some selectors so these might not show up until a particular usecase is seen)

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• Find mininum unused value in mysql table

  - by splattru

  I have a MySQL table like this: +--------+-------+ + Server + Port + +--------+-------+ + 1 + 27001 + +--------+-------+ + 2 + 27002 + +--------+-------+ + 4 + 27004 + +--------+-------+ How you can see - here was 27003 port - but it was deleted some time ago (just for example). Is there some way to know the minimum value that is not used (higher than 27000 for example) in mysql table? Or there is no way and I need to make an separate table with all ports and column with "used" or "not used" ? Situation explanation: I am creating game hosting website, and I can use auto-increment for ports, but I will have a lot of deleted/unused ports after some time, and I want to use all of them before increasing port range. Thanks for your answers!

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