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  • Obtain reference to Parent object during instantiation

    - by GoldBishop
    I have a situation where a custom class is a property of another class. What i need to be able to do, if it is possible at all, is obtain a reverse to the "parent" class (ie the the class that holds the current class as a property). For Instance: Public Class Class1 ... public readonly property Prop11 as Class2 public property Prop12 as String ... End Class Public Class Class2 ... private _par as Class1 private _var21 as string ... Public Sub New(...) me._par = ???? ... End Sub public readonly property Prop21 as string Get return me._par.Prop12 & me._var21 End Get End Property ... End Class Ultimately, i am trying to access other properties within Class1 from Class2 as they do have substance for information from within Class2. There are several other classes within Class1 that provide descriptive information to other classes contained within it as properties but the information is not extensible to all of the classes through Inheritance, as Class1 is being used as a resource bin for the property classes and the application itself. Diagram, lazy design ;): Application <- Class1.Prop12 Application <- Class1.Prop11.Prop21 Question: Is it possible to get a recursion through this design setup?

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  • Architectural approaches to creating a game menu/shell overlay on PC/Linux?

    - by Ghopper21
    I'm am working on a collection of games for a custom digital tabletop installation (similar to Microsoft Surface tables). Each game will be an individual executable that runs full-screen. In addition, there needs to be a menu/shell overlay program running simultaneously. The menu/shell will allow users to pause games, switch to other games, check their game history, etc. Some key requirements of the shell: it intercepts all user input (mainly multitouch) first before passing it on to the currently running game (so that it can, for instance, know to pop-up at a "pause" command); can reveal on arbitrary portions of the screen, with the currently running (but presumably paused) game still showing underneath, ideally with its shape/size being dynamic, to allow for creation of an animated in/out drawer effect over the game. I'm currently looking into different architectural approaches to this problem, including Fraps and DirectX overlays, but I'm sure I'm missing some ways to think about this. What are the main approaches I should be considering? (Note the table is currently being run by Windows PC, but it could potentially be a Linux box instead.)

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  • Whats a good way to do Collision with 2D Rectangles? can someone give me a tip?

    - by Javier
    using System; using System.Collections.Generic; using System.Linq; using System.Text; using Microsoft.Xna.Framework; namespace BreakOut { class Field { public static Field generateField() { List<Block> blocks = new List<Block>(); for (int j = 0; j < BlockType.BLOCK_TYPES.Length; j++) for (int i = 0; i < (Game1.WIDTH / Block.WIDTH); i++) { Block b = new Block(BlockType.BLOCK_TYPES[j], new Vector2(i * Block.WIDTH, (Block.HEIGHT + 2) * j + 5)); blocks.Add(b); } return new Field(blocks); } List<Block> blocks; public Field(List<Block> blocks) { this.blocks = blocks; } public void Update(GameTime gameTime, Ball b) { List<Block> removals = new List<Block>(); foreach (Block o in blocks) { if (o.BoundingBox.Intersects(new Rectangle((int)b.pos.X, (int)b.pos.Y, Ball.WIDTH, Ball.HEIGHT))) //collision with blocks { removals.Add(o); } } foreach(Block o in removals) blocks.Remove(o); //removes the blocks, but i need help hitting one at a time } public void Draw(GameTime gameTime) { foreach (Block b in blocks) b.Draw(gameTime); } } } My problem is that My collision in this sucks. I'm trying to add collision with a ball and hitting against a block and then one of the blocks dissapear. The problem i'm having is: When the ball hits the block, it removes it all in one instance. Please people don't be mean and say mean answers to me, im just in highschool, still a nooby and trying to learn more c#/XNA..

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  • Do I need to have a company so that I can buy an SSL certificate that will display green at the address bar?

    - by André Pena
    I have a non-comercial website in which the users store some sensitive information so I feel the need to have a SSL certificate, but it seems that if I don't have a registered company I can't buy a green certificate. I have some related questions: Is it true that if I don't have a company, I can't have a green certificate? If I issue a standard (non-business) certificate that won't go green (from GoDadday, for instance), will it go red? Or will it have a less ugly display.. something more neutral that won't scary the user.

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  • SQL Server Configuration Manager menu won't show up

    - by Aurelien Gasser
    I'm running a Windows 8 VM on a MacBook using Parallels Desktop 9. On this Windows VM, I have a SQL Server instance running perfectly. However, when I launch SQL Server Configuration Manager, and I want to enable an IP configuration, the Enable menu options are invisible : Here is a screenshot : http://i.imgur.com/PY7qGup.png (I don't have enough reputation to display the image inline) When I click the arrow, a contextual menu should appear with 2 choices "Yes" or "No". Instead, a tiny contextual menu appears, but it's empty. I tried using my keyboard tab/space/arrows keys without success. Has anyone faced/solved the same problem ?

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  • Script to gather all the files ending in .log and create a tar.gz file.

    - by Oscar Reyes
    I'm currently using this script line to find all the log files from a given directory structure and copy them to another directy where I can easily compress them. find . -name "*.log" -exec cp \{\} /tmp/allLogs/ \; The problem I have, is, the directory/subdirectory information gets lost because, I'm copying only the file. For instance I have: ./product/install/install.log ./product/execution/daily.log ./other/conf/blah.log And I end up with: /tmp/allLogs/install.log /tmp/allLogs/daily.log /tmp/allLogs/blah.log And I would like to have: /tmp/allLogs/product/install/install.log /tmp/allLogs/product/execution/daily.log /tmp/allLogs/other/conf/blah.log

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  • Strategy for hosting 700+ domains, each with static HTML site

    - by jonschlinkert
    I have a portfolio of more than 700 domain names, and ideally I'd like to put up a single-page HTML/CSS/JavaScript webpage for each domain. Is there a system/strategy/workflow that will allow me to: Automate the deployment of new websites, quickly and easily without having to manually initiate each new website in an admin panel. For instance, I've seen dropbox-based solutions that claim to make it simple to setup new websites on your dropbox account, but you still have to set each one up in an admin interface first. It would be so much easier to have a folder naming convention that allowed the user to easily clone/copy/duplicate sites inside their Dropbox App folder (https://www.dropbox.com/developers/blog/23) to create new ones. Sounds interesting, however... It's easy to managing CNAMEs on the registrar-side, is there a way to quickly associate CNAMEs with new websites, maybe gh-pages-style (https://help.github.com/articles/setting-up-a-custom-domain-with-pages)? With GitHub's gh-pages, all you have to do is drop a file called CNAME into your repo, with the domain name you want associated with the repo inside the file. gh-pages isn't a good solution for what I'm doing though unfortunately. I'm also a front-end developer, specializing in rapid web development and "front-end build systems", so I building and maintaining static assets for hundreds of sites is no problem. It's the hosting-side that I really struggle with. Any suggestions?

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  • dhclient append settings from multiple DHCP servers

    - by Brian
    I have a server with two interfaces connected to two separate networks, using DHCP for both. When dhclient is writing /etc/resolv.conf, I would like it to append settings that aren't already there. For instance, if I receive from one DHCP server: nameserver 10.0.0.1 search one.mydomain.com and from another: nameserver 10.1.1.254 search two.mydomain.com Then resolv.conf should look like this: search one.mydomain.com two.mydomain.com nameserver 10.0.0.1 nameserver 10.1.1.254 At the moment, it seems the last dhclient overwrites whatever was there. I know I can preconfigure settings in dhclient.conf using supercede or append, but then I have to hard-code the values. I've scoured the man page for dhclient, but it seems like dhclient prefers to work alone (i.e. not in conjunction with any other dhclients)...or am I missing something?

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  • Custom Windows AMI for Amazon EC2

    - by cutyMiffy
    Hello: I am new to the Amazon EC2 services and I am planning to host a Windows based vm on Amazon. I have lot of fuzziness about AMIs on Amazon. So my first question would be, am I be able to install softwares and frameworks(e.g. Silverlight, .NET, etc) on a existing Windows instance that I select? And if not, how can I create a custom AMI so that I can install these softwares that I need before I submit it to Amamzon and launch? Thanks a lot for your help :) Deeply appriciated

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  • May the file size returned by stat be compromised?

    - by codeholic
    I want to make sure that nobody changed a file. In order to accomplish that, I want not only to check MD5 sum of the file, but also check its size, since as far as I understand this additional simple check can sophisticate falsification by several digits. May I trust the size that stat returns? I don't mean if changes were made to stat itself. I don't go that deep. But, for instance, may one compromise the file size that stat returns by hacking the directory file? Or by similar means, that do not require superuser privileges? It's Linux.

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  • Bound external Cisco CIGESM ports to a specific BladeServer

    - by Vinícius Ferrão
    We have an IBM BladeCenter with 14 blade servers and one external Cisco CIGESM for Ethernet connectivity. Since this hardware is a little old, we will use it for other services, and we want to run a pfSense instance on one of the blades. It's just an Firewall Appliance, but it needs two network interfaces: one for the WAN and the other one for LAN access. Our architecture works on top of static routes, we don't use NAT, so we got the WAN IP in one interface routing to the another one. The main problem is how to plug the WAN cable in one of the four external ports and make it exclusive to the blade server containing the firewall. And we also need an exit port that goes through a 3COM 4200G switch that makes the internal routing and VLAN separation. Thanks in advance

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  • Mounting both /dev/sda and /dev/sda1 - how can this be?

    - by itsadok
    I work on an Amazon EC2 instance that somebody else set up. We have an EBS volume mounted on /dev/sda, even though the root device is already on /dev/sda1, and we're also using `/dev/sda2' user@server:~$ mount /dev/sda1 on / type ext3 (rw) ... (snip) /dev/sda2 on /mnt type ext3 (rw) /dev/sda on /vol type xfs (rw,noatime) ... This doesn't seem to fit with what I know about the way /dev/ works. How is this possible, and more importantly: will this cause trouble in the future? I'm running ubuntu 9.04 jaunty.

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  • Address already in use - Amazon AWS

    - by Peter
    I've run into a really weird issue. I was debugging a server 500 error script on our EC2 instance and found that we didn't have ioncube loaders installed. So I went to go install them and I created a new file at /etc/php.d/zend.ini and initially I inserted the value of extension=/usr/local/ioncube/ioncube_loader_lin_5.3.so and restarted httpd at which point it told me: The ionCube Loader is a Zend-Engine extension and not a module Please specify the Loader using 'zend_extension' in php.ini PHP Fatal error: Unable to start ionCube Loader module in Unknown on line 0 So I changed the contents of zend.ini to zend_extension=/usr/...etc. Now when I attempt to restart httpd I get this error: Starting httpd: (98)Address already in use: make_sock: could not bind to address [::]:80 (98)Address already in use: make_sock: could not bind to address 0.0.0.0:80 no listening sockets available, shutting down Unable to open logs I can't even run /etc/init.d/httpd stop without it erroring. I've since removed zend.ini to see if that's what caused it and it doesn't seem to be. Any ideas?

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  • How to know if my nginx is in good health?

    - by Howard
    I am running a nginx on EC2 (m1.small) for SSL termination. I am using 2 workers on Ubuntu, with latest nginx (stable), the network throughput is around 2Mbps and system load average is around 2 to 3. I am wondering if this system is in good health for now, e.g. what is the queue length (I know nginx can handle a lot of concurrent request, but I mean before the request is being served, how many of them need to wait before being served) what is the average queue time for a given request to be served. I want to know because if my nginx is cpu bounded (e.g. due to SSL), I will need to upgrade to a faster instance. My current nginx status Active connections: 4076 server accepts handled requests 90664283 90664283 104117012 Reading: 525 Writing: 81 Waiting: 3470

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  • need advice for storing data setup hardware for client with 80TB per year of data footprint increase

    - by dasko
    hi everyone, i currently have a client that will be adding replicated data from satellite locations in the number of approximately 80TB per year. with this said in year 2 we will have 160TB and so on year after year. i want to do some sort of raid 10 or raid 6 setup. i want to keep the servers to approximately 4u high and rack mounted. all suggestions welcome on a replication strategy. we will be wanting to have one instance of the data in house and the other to be co-located (any suggestions on co-locate sites too?). the obvious hardware will be something like a rack mount server with hot swap trays and dual xeon based type processors. the use of the data is for archives of information, files will be made up of small file sizes. i can add or expand to this question if it is too vague. thanks for looking.

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  • Apache does not serve non-locally

    - by yodaj007
    I have a freshly installed instance of Fedora Core 16 inside VirtualBox using bridged networking. On it, as root I typed in: yum -y install httpd service httpd start ifconfig Inside the VM, I can open a web browser to 'localhost' and I get the Apache test page. It works. But in Windows (the machine hosting the VM), I point my browser to the IP address returned by ifconfig (192.168.2.122). The connection times out. I can go to a command prompt and ping the VM. Is there a firewall or something that comes with Fedora by default? Or is there something I need to change in a config file?

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  • BusEnum2 and a Minor Bug Fix

    - by Kate Moss' Open Space
    The default root bus driver, BusEnum, enumerate and active drivers one by one in synchronized manner. It is not only slowing the boot time but in the even if any of driver's init function (XXX_init) get hanged, the whole system won't boot at all. There is a sample of enhanced root bus driver, BusEnum2, on the http://msdn.microsoft.com/en-us/library/dd187254.aspx The page provides the sample code and the detail explanation of the design concept. With multi-threaded BusEnum2 on CE7 with SMP enabled system, the scalability is even more significant. Since you have more than one processor and it can load drivers in parallel! Everything looks good so far, except to there is a small bug in the sample code. Fortunately, it is easy to fix. But hard to trace if you ever enc outer it! The BUSENUM2 flag only defined in BUSENUM2\BUSDEF\sources but not in BUSENUM2\BUSENUM\sources. The DeviceFolder is implemented in BUSENUM2\BUSDEF but the instance is created in BUSENUM2\BUSENUM\busenum.cpp, so the result is it allocates less memory than actual need.   Add   CDEFINES=$(CDEFINES) -DBUSENUM2   into BUSENUM2\BUSENUM\sources and the problem fixed!

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  • Setting up scripts in Amazon EC2 Cloud

    - by racket99
    Hello, I am currently running a few perl and python scripts on a windows pc and would like to port over to the Amazon EC2 servers running 64-bit LINUX. The scripts are basic web scrapers that go to a variety of websites, get data and then save daily as csv files. I would like to install these in the cloud and get them running in an automated way so that they will run without my intervention. Also given that I don't want to lose all the data if the instance crashes, I should also upload the csv files to Amazon S3. Any idea how I can do this? I am not terribly versed in LINUX nor do I know Perl/Python well. What is the best way for me to tackle thi

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  • Why are some PNGs open in Photoshop with Indexed Colors and no transparency?

    - by Daniel Beardsley
    Why are some 32 bit PNGs opened in Photoshop with Indexed Colors and no transparency? For instance, I grabbed a png icon file of the Stack Overflow logo at: http://blog.stackoverflow.com/wp-content/uploads/icon-so.png When opening it in Photoshop CS3, it apparently treats it as indexed color and gets rid of the alpha channel. The image on the right is a screen grab of the icon. Changing the Image mode in Photoshop to RGB doesn't change the image at all. I've tried this with a few other PNGs and it seems hit or miss. When viewed in other programs, it displays fine. left:png opened in Photoshop, right:screen grab of png from browser What gives?, does Photoshop not interpret the PNG file format correctly?

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  • Should I, and how do I incorporate microdata into my asp.net website with 47 pages?

    - by Jason Weber
    I have an asp.net (vb) with 47 pages. The problem is that it's in 10 different languages, although 98% just use English. I have 5 master pages. I've read Google Webmaster Tools, but I'm still confounded. I'm reading about how microdata is the way to go. Does this mean I should put itemtype and itemprop span and div tags in my master pages, or should I do all of my 47 pages (.resx resource files) separately? The main key phrase I want throughout search results is "machine vision". For instance, the first couple sentences on my "about.aspx" page are: <span itemprop="name">USS Vision Inc.</span> (USS) is a privately-owned company with headquarters in <span itemprop="locality">Detroit, Michigan, USA</span>. We design, engineer, produce, and integrate special machine vision error-proofing products and <a href="http://www.ussvision.com/services/" target="_self" itemprop="url">services</a> that create lean factories by improving the quality of manufactured products, and by significantly reducing manufacturing costs through advanced automation. Am I doing this right, or how would I do this if I'm not? Should I use the itemprop="url" or other rich snippets for every link in my website? I mean, do I need to add an itemprop to just about everything, or can I just alter my master pages? Any guidance in this regard to help improve my SEO and SERPS would be greatly appreciated!

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  • How do I create DNS entries for EC2 instances created by Auto Scaling?

    - by Evan
    I'm looking into using auto scaling groups for a tier of webservers that would be fronted by an ELB. One of the things I'm having a hard time with is how to give each new instance the proper DNS name. For example, I'd like webservers to have names like frontend-web-XXX.prod.example.com so their names would appear correct in logs and just ease of organization. I have two other tiers I'd ultimately like to make autoscaled and I'd like them to have names like api-web-XXX.prod.example.com as well. I have some experience with cloudformation templates and have spun up individual instances with associated Route53 records but I don't see any indication of how this can be done within an autoscaled group.

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  • Duplicate xserver

    - by hariks0
    When I start my ubuntu pc, just before my login, I receive a message that says "An xserver is already started in display :0. Would you like to try starting xserver in another virtual workspace?". Now If I answer 'No' the message appears again and again. If I say 'Yes' It goes to gnome desktop in virtual desktop 9 [Ctrl+Alt+F9] It was previously available only in [Ctrl+Alt+F7] but now available in both F7 and F9. Now I assume that there are two instances of xserver both in [Ctrl+Alt+F7] and [Ctrl+Alt+F9]. I think by killing one instance of xserver manaually I can disable the message. How do I do this? Thanks in advance.

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  • xmodmap modifications aren't enough - anything else I can do?

    - by Codemonkey
    I'm using an Apple keyboard which has some annoyances compared to other keyboards. Namely, the Alt_L and Super_L keys are swapped, and the bar and less keys are swapped ("|" and "<"). I've written an Xmodmap file to swap the keys back: keycode 49 = less greater less greater onehalf threequarters keycode 64 = Super_L NoSymbol Super_L keycode 94 = bar section bar section brokenbar paragraph keycode 108 = Super_R NoSymbol Super_R keycode 133 = Alt_L Meta_L Alt_L Meta_L keycode 134 = Alt_R Meta_R Alt_R Meta_R I did this by identifying the keys using xev and the default modmap xmodmap -pke and swapping the keycodes. xev now identifies all my keys as correct, which is awesome! I can also use the correct keys to type the bar and less than symbols. (I followed this answer on askubuntu: How do I remap certain keys?) But it seems the change isn't very deep. For instance, the Super key is now broken in the Compiz Settings Manager. No shortcuts involving the Super key works (but the Alt key does). Also the settings dialog for Gnome Do doesn't heed the changes in xmodmap, and I can't open the Gnome Do window anymore if I use any of the remapped keys. So to summarize, everything broke. I would like a deeper way of telling Ubuntu (or any other Linux distro for that matter) which keys are which on the keyboard. Is there a way to edit the Keyboard Layout directly? I'm using the Norwegian Bokmål keyboard layout. Does it reside in a file somewhere I could edit? Any comments, previous experiences or relevant stray thoughts would be greatly appreciated - Thanks

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  • Dealing with inflexible programmers.

    - by Singleton
    Sometimes programmers who work on a project for long time get inflexible, and it becomes difficult to reason with them. Even if we do manage to convince them, they can be unlikely to implement our suggestions. For instance, I recently joined a project where the build & release process is too complicated and has unnecessary roadblocks. I suggested that we get rid of some of the development overhead (like filling a few spreadsheets) just by integrating defect management and version control tools (both are IBM-Rational tools so integration can be a very easy one-off effort). Also, if we use tools like Maven & Ant (the project involves Java and some COTS products) build & release can be simplified which should reduce manual errors & intervention. I managed to convince others and I'm ready to put in the effort to develop a proof of concept. But the ‘Senior’ developer is not willing, possibly because the current process makes him more valuable. How do we handle this situation without developing friction in the team?

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  • How to determine what program send the packet recorded in Wireshark?

    - by Tono Nam
    I was taking some tutorials on Wireshark in order to analyze the packets sent and received when talking to a web server for purposes of learning. When I start listening/recording packets in Wireshark, there where so many packages being recorded (700 packages per minute). Is it normal to have that much traffic if I have all the programs that will cause traffic such as all browsers, log me in, dropbox, goto meeting, etc., closed? In order to try to solve the problem I am analyzing random packets. Take for instance this filter: I just selected a random IP: 74.125.130.99. So how can I know from what program those packets where created? Also how can I get more info about that communication bwtween my computer (192.168.0.139) and that server (74.125.130.99)? I just selected a random IP from the Wireshark capture. There are also other IPs that I have no idea why they are communicating with my computer. How can I figure that out?

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