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  • AJI Report #15–Zac Harlan Talks About Iowa Code Camp

    - by Jeff Julian
    We sit down with Zac Harlen and talk about Iowa Code Camp, what makes up a Code Camp, and how to start your own Code Camp. Zac has been a part of the leadership team for a few years for Iowa Code Camp and is the Development Manager for JP Cycles. We also get into what it takes to speak at a Code Camp if you are interested in growing beyond the user group as a speaker. Listen to the Show Site: LinkedIn Profile Blog: Zac Harlan Twitter: @ZacHarlan

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  • Undocumented Secrets of MATLAB-Java Programming, un livre de Yair Altman, critique par Jérôme Briot

    Undocumented Secrets of MATLAB-Java Programming de Yair Altman D'après l'éditeur : Citation: For a variety of reasons, the MATLAB®-Java interface was never fully documented. This is really quite unfortunate: Java is one of the most widely used programming languages, having many times the number of programmers and programming resources as MATLAB. Also unfortunate is the popular claim that while MATLAB is a fine programming platform for prototyping...

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  • RowFilter.regexFilter multiple columns

    - by twodayslate
    I am currently using the following to filter my JTable RowFilter.regexFilter( Pattern.compile(textField.getText(), Pattern.CASE_INSENSITIVE).toString(), columns ); How do I format my textField or filter so if I want to filter multiple columns I can do that. Right now I can filter multiple columns but my filter can only be of one of the columns An example might help my explanation better: Name Grade GPA Zac A 4.0 Zac F 1.0 Mike A 4.0 Dan C 2.0 The text field would contain Zac A or something similar and it would show the first Zac row if columns was int[]{0, 1}. Right now if I do the above I get nothing. The filter Zac works but I get both Zac's. A also works but I would then get Zac A 4.0 and Mike A 3.0. I hope I have explained my problem well. Please let me know if you do not understand.

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  • why aren't interfaces [Serializable]?

    - by Zac Harlan
    I would think that adding that attribute to an interface would be helpful make sure you don't create classes that use the interface and forget to make them serializable. This could be a very fundamental question but wanted to ask the experts. Thanks in advance. Zac

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  • VSFTPD does not allow upload with virtual users

    - by Mr. Squig
    I am attempting to setup VSFTPD with virtual users on a server running Ubuntu 12.04. I have configured the server to allow for virtual users to login, but I am having trouble getting it to allow uploads. My vsftpd.conf is as follows: listen=YES anonymous_enable=NO local_enable=YES write_enable=YES local_umask=022 anon_upload_enable=YES dirmessage_enable=YES use_localtime=YES xferlog_enable=YES connect_from_port_20=YES chroot_local_user=YES virtual_use_local_privs=YES guest_enable=YES guest_username=virtual user_sub_token=$USER local_root=/var/www/$USER hide_ids=YES secure_chroot_dir=/var/run/vsftpd/empty pam_service_name=vsftpd rsa_cert_file=/etc/ssl/private/vsftpd.pem /etc/pam.d/vsftpd contains: auth required pam_pwdfile.so pwdfile /etc/vsftpd.passwd crypt=hash account required pam_permit.so crypt=hash I have two virtual users set up, one of which has the same name as a local user. They each have a directory in /var/www/ owned by 'virtual'. As I understand it, when a virtual user logs in this way they will appear to the system as the user virtual. Using this configuration user can log on, but cannot upload files. The error given in /var/log/vsftpd.log is: Tue Nov 20 19:49:00 2012 [pid 2] CONNECT: Client "96.233.116.53" Tue Nov 20 19:49:07 2012 [pid 1] [zac] OK LOGIN: Client "96.233.116.53" Tue Nov 20 19:49:11 2012 [pid 2] CONNECT: Client "96.233.116.53" Tue Nov 20 19:49:11 2012 [pid 1] [zac] OK LOGIN: Client "96.233.116.53" Tue Nov 20 19:49:11 2012 [pid 3] [zac] FAIL CHMOD: Client "96.233.116.53", "/test.ppm 644" I have tried changing the permissions of these directories in all sorts of ways, but nothing seem to work. I have a feeling that it is something simple related to permissions. Any ideas?

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  • .NET Membership with Repository Pattern

    - by Zac
    My team is in the process of designing a domain model which will hide various different data sources behind a unified repository abstraction. One of the main drivers for this approach is the very high probability that these data sources will undergo significant change in the near future and we don't want to be re-writing business logic when this happens. One data source will be our membership database which was originally implemented using the default ASP.Net Membership Provider. The membership provider is tied to the System.Web.Security namespace but we have a design guideline requiring that our domain model layer is not dependent upon System.Web (or any other implementation/environment dependency) as it will be consumed in different environments - nor do we want our websites directly communicating with databases. I am considering what would be a good approach to reconciling the MembershipProvider approach with our abstracted n-tier architecture. My initial feeling is that we could create a "DomainMembershipProvider" which interacts with the domain model and then implement objects in the model which deal with the repository and handle validation/business logic. The repository would then implement data access using our (as-yet undecided) ORM/data access tool. Are there are any glaring holes in this approach - I haven't worked closely with the MembershipProvider class so may well be missing something. Alternatively, is there an approach that you think will better serve the requirements I described above? Thanks in advance for your thoughts and advice. Regards, Zac

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  • Learning C, C++ and C#

    - by Zac
    I'm sure you guys are tired of this question but after wading through hours of similar posts and questions I've really not made any progress to my specific concerns. I was hoping you guys could shed some light on a couple of questions I have before I decide on a course of action. BACKGROUND: I'm wanting to enroll in some type of program to learn a programming language/get a certificate/degree to work in the field. I've always been interested and bought a book on VB back in high school and dabbled. Now I want to get serious after a huge hiatus. Question 1: I've read it's counter-productive to learn C first, then C++ or C# because you develop bad habits. In a lot of college courses I've looked at, learning C/C++ is mandatory to advance. Should I ever bother learning C? On a related note, I really don't understand the difference between C and C++, or C# for the matter other than it incorporates .NET (which, I understand, is a compilation of tools and libraries that make programming easier and faster). Question 2: Where did you guys learn to program? Where do you recommend? Is it possible to land a job programming being self-taught? Is my best chance an ITT tech or a regular college? I was going to enroll in a JC and go from there but I can't decide what to do. LAST question :) I heard C++ is being "ported" to .NET. True? And if so, is this going to make C++ a solid, in-demand language to learn? Thanks for looking. :)

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  • Can I use a Mac Mini as a web server and database server? What are the pros and cons?

    - by Christopher Altman
    We are a bootstrapped web start up. We have a LAMP web application that we expect relatively low to mid traffic because users need an account to log in. Our current approach is to colocate two servers, a web and mysql database server. We are planning to use Ubuntu Server 9.04. We have shopped around for dedicated servers but the price range from $900 to $1500 per month, therefore we are exploring the colocation approach. We are considering purchasing two Mac Minis (2.0GHz Intel Core 2 Duo 2 Gb RAM) because we are familiar with the machines are the prices are relatively inexpensive. What are the pros and cons of using these 'non-server' grade machines? We would install Ubuntu Sever and attach firewire external hard drives. Any advice on how to set up 'good-and-economic' web/database servers is welcomed.

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  • Apache 2: I have multiple domain names I want to point to one Virtual Host. Do I use ServerAlias?

    - by Chris Altman
    I have multiple domain names, for example: www.foo.com www.goo.com www.moo.com www.coo.com I want all of these domain names to resolve to one website AND to redirect to www.foo.com What is the best method to achieve this? Multiple entries? Use ServerAlias? Something else? If the best method is ServerAlias, what is the syntax? ServerAlias www.goo.com, www.moo.com, www.coo.com

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  • Is it possible to host a website in the 'ether' of the Internet -- not on a server -- so that it can

    - by Chris Altman
    This is a theoretical problem I am curious about. Websites are hosted on servers. Servers can be taken offline. Is it possible to host a website in the 'ether' of the Internet -- not on a server -- so that it cannot be taken down? One example, is that the website is hosted on other websites, like a parasite. Another is that it is assembled through storing pieces on DNS machines, routers, etc., so that it get assembled on the fly. The purpose is that this website could live forever because no one person can remove it. The answers I am looking for are plausible idea/approaches on technically how this could be built.

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  • How do I disable nginx sending messages to syslog?

    - by altman
    My nginx sends lots of messages to syslog, but I don't need them. In my nginx.conf: error_log /var/log/nginx-error.log notice; ...... server { access_log off; location / { .... } } but, in my /var/log/message you see Nov 22 23:25:09 cache3 nginx: 2011/11/22 23:25:09 [error] 3437#0: *32172530 kevent() reported about an closed connection (60: Operation timed out) while reading response header from upstream, client: , server: , request: "GET http://www.igoido012.com//vk HTTP/1.1", upstream: "http:////vk", host: "www.igoido012.com", referrer: "http://www.baidu.com/" Nov 22 23:25:09 cache3 nginx: 2011/11/22 23:25:09 [error] 3437#0: *32099531 upstream timed out (60: Operation timed out) while reading response header from upstream, client: , server: , request: "GET http://t.web2.qq.com/channel/poll?msg_id=0&clientid=431509&t=1321975433305 HTTP/1.1", upstream: "http://:80/channel/poll?msg_id=0&clientid=431509&t=1321975433305", host: "t.web2.qq.com", referrer: "http://t.web2.qq.com/proxy.html?v=20110331001" How can I prevent nginx sending messages to my syslog?

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  • Is it possible to host a website in the 'ether' of the Internet -- not on a server -- so that it cannot be taken down? [closed]

    - by Christopher Altman
    This is a theoretical problem I am curious about. Websites are hosted on servers. Servers can be taken offline. Is it possible to host a website in the 'ether' of the Internet -- not on a server -- so that it cannot be taken down? One example, is that the website is hosted on other websites, like a parasite. Another is that it is assembled through storing pieces on DNS machines, routers, etc., so that it get assembled on the fly. The purpose is that this website could live forever because no one person can remove it. The answers I am looking for are plausible idea/approaches on technically how this could be built.

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  • Snow Leopard connecting to Unbuntu 10.04 through Samba failure -- need help fixing.

    - by Chris Altman
    I have a Ubuntu 10.04 web server. I want to connect to it with my OSX 10.6 machine and Finder. I have installed openSSH and Samba on the Ubuntu machine. In my smb.conf I have a Share Definition: [www] comment = Development Computer WWW path = /var/www writeable = yes browseable = yes allow hosts = 192.168.1. I can connect to the machine through Finder using a non-root user. When I attempt to add files thought Finder I get an "Insufficient Permissions" error. Please help. I am not sure if the issue is in the Samba configuration or OSX 10.6 Thank you

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  • Changing DNS - Forgot to change MX records for one month - Is there a way to retrieve emails that we

    - by Chris Altman
    We have our own domain. Our email is hosted by Google Apps. We switched web servers and name servers to a new provider. In the switch, I forgot to move the MX record. When people tried to send emails to our domain, there was no bounce back. We fixed the MX record and now receive email. Is there anyway to retrieve the emails that were sent in the month when there was no MX record? I doubt it because there was no MX record on our name server. Where would the emails have gone since they did not bounce back?

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  • dragonflyBSD NFS server and windows 2008 client promission deny

    - by altman
    I have setup a dragonflyBSD NFS server and a windows 2008 NFS client(it's in the linux-KVM). The dragonflyBSD exports file like this: /tank -mapall=root windows-client and i setup my windows 2008 a NFS client all right. There is my win cmd to mount NFS. mount \\dragonfly-server\tank e:\ After finished my configuration. I found the windows client can mount the remote tank partition. And i can create a file or a dir. But when i try to delete the file i just create. It alerts permission deny. You must have the permission.And the same result when i try to write to the text i create in the NFS partition I don't know why i just can create the file through NFS, but can't do any thing else. Is there any body can help?

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  • Setting up apache to view https pages

    - by zac
    I am trying to set up a site using vmware workstation, ubuntu 11.10, and apache2. The site works fine but now the https pages are not showing up. For example if I try to go to https://www.mysite.com/checkout I just see the message Not Found The requested URL /checkout/ was not found on this server. I dont really know what I am doing and have tried a lot of things to get the ssl certificates in there right. A few things I have in there, in my httpd.conf I just have : ServerName localhost In my ports.conf I have : NameVirtualHost *:80 Listen 80 <IfModule mod_ssl.c> # If you add NameVirtualHost *:443 here, you will also have to change # the VirtualHost statement in /etc/apache2/sites-available/default-ssl # to <VirtualHost *:443> # Server Name Indication for SSL named virtual hosts is currently not # supported by MSIE on Windows XP. Listen 443 http </IfModule> <IfModule mod_gnutls.c> Listen 443 http </IfModule> In the /etc/apache2/sites-available/default-ssl : <IfModule mod_ssl.c> <VirtualHost _default_:443> ServerAdmin webmaster@localhost DocumentRoot /var/www <Directory /> Options FollowSymLinks AllowOverride None </Directory> <Directory /var/www/> Options Indexes FollowSymLinks MultiViews AllowOverride None Order allow,deny allow from all </Directory> .... truncated in the sites-available/default I have : <VirtualHost *:80> ServerAdmin webmaster@localhost DocumentRoot /var/www #DocumentRoot /home/magento/site/ <Directory /> Options FollowSymLinks AllowOverride None </Directory> <Directory /var/www/> #<Directory /home/magento/site/> Options Indexes FollowSymLinks MultiViews AllowOverride None Order allow,deny allow from all </Directory> ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/ <Directory "/usr/lib/cgi-bin"> AllowOverride None Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch Order allow,deny Allow from all </Directory> ErrorLog ${APACHE_LOG_DIR}/error.log # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. LogLevel warn CustomLog ${APACHE_LOG_DIR}/access.log combined Alias /doc/ "/usr/share/doc/" <Directory "/usr/share/doc/"> Options Indexes MultiViews FollowSymLinks AllowOverride None Order deny,allow Deny from all Allow from 127.0.0.0/255.0.0.0 ::1/128 </Directory> </VirtualHost> <virtualhost *:443> SSLEngine on SSLCertificateFile /etc/apache2/ssl/server.crt SSLCertificateKeyFile /etc/apache2/ssl/server.key ServerAdmin webmaster@localhost <Directory /> Options FollowSymLinks AllowOverride None </Directory> <Directory /var/www/> #<Directory /home/magento/site/> Options Indexes FollowSymLinks MultiViews AllowOverride None Order allow,deny allow from all </Directory> </virtualhost> I also have in sites-availabe a file setup for my site url, www.mysite.com so in /etc/apache2/sites-available/mysite.com <VirtualHost *:80> ServerName mysite.com DocumentRoot /home/magento/mysite.com <Directory /> Options FollowSymLinks AllowOverride All </Directory> <Directory /home/magento/mysite.com/ > Options Indexes FollowSymLinks MultiViews AllowOverride All Order allow,deny allow from all </Directory> ErrorLog /home/magento/logs/apache.log # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. LogLevel warn </VirtualHost> <VirtualHost *:443> ServerName mysite.com DocumentRoot /home/magento/mysite.com <Directory /> Options FollowSymLinks AllowOverride All </Directory> <Directory /home/magento/mysite.com/ > Options Indexes FollowSymLinks MultiViews AllowOverride All Order allow,deny allow from all </Directory> ErrorLog /home/magento/logs/apache.log # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. LogLevel warn </VirtualHost> Thanks for any help getting this setup! As is probably obvious from this post I am pretty lost at this point.

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  • ISAPI filter with LDAP over SSL only works as administrator

    - by Zac
    I have created an ISAPI filter for IIS 6.0 that tries to authenticate against Active directory using LDAP. The filter works fine when authenticating regularly over port 389, but when I try to use SSL, I always get the 0x51 Server Down error at the ldap_connect() call. Even skipping the connect call and using ldap_simple_bind_s() results in the same error. The weird thing is that if I change the app pool identity to the local admin account, then the filter works fine and LDAP over SSL is successful. I created an exe with the same code below and ran it on the server as admin and it works. Using the default NETWORK SERVICE identity for the site's app pool is what seems to be the problem. Any thoughts as to what is happening? I want to use the default identity since I don't want the website to have elevated admin privileges. The server is in a DMZ outside the network and domain where our DCs are that run AD. We have a valid certificate on our DCs for AD as well. Code: // Initialize LDAP connection LDAP * ldap = ldap_sslinit(servers, LDAP_SSL_PORT, 1); ULONG version = LDAP_VERSION3; if (ldap == NULL) { strcpy(error_msg, ldap_err2string(LdapGetLastError())); valid_user = false; } else { // Set LDAP options ldap_set_option(ldap, LDAP_OPT_PROTOCOL_VERSION, (void *) &version); ldap_set_option(ldap, LDAP_OPT_SSL, LDAP_OPT_ON); // Make the connection ldap_response = ldap_connect(ldap, NULL); // <-- Error occurs here! // Bind and continue... } UPDATE: I created a new user without admin privileges and ran the test exe as the new user and I got the same Server Down error. I added the user to the Administrators group and got the same error as well. The only user that seems to work with LDAP over SSL authentication on this particular server is administrator. The web server with the ISAPI filter (and where I've been running the test exe) is running Windows Server 2003. The DCs with AD on them are running 2008 R2. Also worth mentioning, we have a WordPress site on the same server that authenticates against LDAP over SSL using PHP (OpenLDAP) and there's no problem there. I have an ldap.conf file that specifies TLS_REQCERT never and the user running the PHP code is IUSR.

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  • I2C_SLAVE ioctl in i2c linux driver

    - by zac
    I am supposed to write a simple write and read program for i2c but the problem is that i dont have the device at hand presently to test it so i need my code to be perfect. I am confused about the function of the I2C_SLAVE ioctl.From what i read,this ioctl is used to set the slave address. But we pass the slave address again when performing read/write using ioctl I2C_RDWR via addr in the structure i2c_msg. So then,what is the function of I2C_SLAVE command?Do i need to call it every time i perform a read or write operation? Thank you in advance.

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  • Does the Intel DX79TO motherboard support x8 devices (SAS HBAs) on PCIe x16 slots?

    - by Zac B
    Context: I have an Intel DX79TO motherboard and a Sun SAS3081E-S/LSI 1060E-S HBA card with a PCIe x8 interface. I plug the HBA into my mobo next to my graphics card, and the HBA power lights illuminate, but the BIOS and OSes (tried Linux, ESXi, Win7) don't see the HBA at all. Question: Does the DX79TO motherboard support non-x16/non-GPU devices in its PCIe x16 slots? According to this question, some consumer motherboards don't support this, but I can't figure out whether or not this motherboard/family does. The answer will affect whether I buy a new motherboard or RMA the SAS card, with money attached to each course, so I figured I'd ask here first. What I've Tried: I've read the spec/manuals for the motherboard and the HBA, and I didn't see anything regarding whether or not the x16 slots were back-compatible to lower lane widths/non graphics-card devices, or whether or not the card could run in wider slots than x8. I've tried contacting Intel, but that was over a month ago and I haven't yet heard anything back except an automated "we got your email!" message.

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  • Are there any Microsoft Exchange Clients for iOS and Android that store their local data in an encrypted manner?

    - by Zac B
    I don't feel like this is a product recommendation question, more of a "does this tech even exist and is it feasible" question, but if I'm wrong, feel free to give this question the boot. Context: Our company has a bunch of traveling employees who access the company's Exchange server via thier iDevices or android phones, but because of the data protection laws in the state where our company is based (and the nature of the data our company works with), a recent security audit found that all mobile devices (laptops, phones, etc) operated by our company need to have all company correspondence and related data encrypted all the time. For laptops, that was easy: BitLocker or TrueCrypt, problem solved. For phones and tablets, however, I'm stumped. Sure, you can put lock screens/passwords on the phones, but the data is still accessible via external extraction, as law enforcement authorities already know. Question: Are there any clients for Microsoft Exchange that run on iOS or Android which store local data encrypted? The people using our mobile devices do a lot of their work while offline, so just giving them OWA access with SSL connection security isn't enough. Are there apps/technologies that present an additional login credential prompt to decrypt locally stored data in the app's storage area on the phone? My gut reaction when I started looking into this was "that doesn't sound like something Apple would allow into the App Store", but I've been wrong before...

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  • Uploading files to https mediawiki

    - by zac
    I am unable to upload files (images) to my mediawiki install. I think it may have something to do with it is being hosted as http secure(HTTPS). I followed carefully the instructions here. I updated write permissions to the /images/ dir drwxrwxrwx 2 apache apache 4096 Apr 13 19:04 images php.ini file_uploads = On In LocalSettings.php $wgEnableUploads = true; $wgFileExtensions = array('png','jpg','jpeg','gif'); When I try to upload it quickly refreshes the page without any errors or any indication anything went wrong, other than how fast it refreshed. When I navigate to the history of uploads it is empty. How can I troubleshoot this. Is it related to the secure http?

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