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  • LAN access via USB from Ipod Touch?

    - by Alec
    I need to browse the local web server from my Ipod Touch to test apps we're developing. I'm not allowed to install a separate wireless access point which would be the easiest solution. Can I use the USB cable for this? Also, the local PC is a Dell Mini 9 running Ubuntu. Has anyone managed to use the wireless port to create an ad hoc connection to an Ipod Touch so the Ipod can browse the Ubuntu web server? This would be an alternate option for me. Thank you!

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  • Strange spam posts not making sense

    - by Paaland
    I'm running a web site with a forum where one small part is open for posting from unregistered users. The site uses captcha, but still some spam posts get through every day. Here is the thing. All of the messages follow the same pattern, but all also come from different IP's. That makes me thing this is some sort of automated scripted "attack" from a botnet of some sorts. The strange thing is that all the messages start with six random characters and contains a couple of links. The words have no meaning and the domains in the links does not even exist. Why would anyone use time and resources spreading these things? Below you can see two of these messages: A5Zfs6 exrzvrbspntz, [url=http://nktqoqllnuab.com/]nktqoqllnuab[/url], [link=http://wtrenldadvsy.com/]wtrenldadvsy[/link], [http://rnlrqfgdvdot.com/] O2oLpL nqeffxhryfdk, [url=http://jutyurbpfxow.com/]jutyurbpfxow[/url], [link=http://jpcdtmdalpow.com/]jpcdtmdalpow[/link], [http://qopqwqxwjdjx.com/] Since all the messages come from different IP's I can't see blocking those will help much. For now I'm considering just dropping all messages following this pattern since it's quite easy to match with a regexp. Have anyone else seen these kinds of messages or know the point of posting them?

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  • Masters vs. PhD - long [closed]

    - by Sterling
    I'm 21 years old and a first year master's computer science student. Whether or not to continue with my PhD has been plaguing me for the past few months. I can't stop thinking about it and am extremely torn on the issue. I have read http://www.cs.unc.edu/~azuma/hitch4.html and many, many other masters vs phd articles on the web. Unfortunately, I have not yet come to a conclusion. I was hoping that I could post my ideas about the issue on here in hopes to 1) get some extra insight on the issue and 2) make sure that I am correct in my assumptions. Hopefully having people who have experience in the respective fields can tell me if I am wrong so I don't make my decision based on false ideas. Okay, to get this topic out of the way - money. Money isn't the most important thing to me, but it is still important. It's always been a goal of mine to make 6 figures, but I realize that will probably take me a long time with either path. According to most online salary calculating sites, the average starting salary for a software engineer is ~60-70k. The PhD program here is 5 years, so that's about 300k I am missing out on by not going into the workforce with a masters. I have only ever had ~1k at one time in my life so 300k is something I can't even really accurately imagine. I know that I wouldn't have at once obviously, but just to know I would be earning that is kinda crazy to me. I feel like I would be living quite comfortably by the time I'm 30 years old (but risk being too content too soon). I would definitely love to have at least a few years of my 20s to spend with that kind of money before I have a family to spend it all on. I haven't grown up very financially stable so it would be so nice to just spend some money…get a nice car, buy a new guitar or two, eat some good food, and just be financially comfortable. I have always felt like I deserved to make good money in my life, even as a kid growing up, and I just want to have it be a reality. I know that either path I take will make good money by the time I'm ~40-45 years old, but I guess I'm just sick of not making money and am getting impatient about it. However, a big idea pushing me towards a PhD is that I feel the masters path would give me a feeling of selling out if I have the capability to solve real questions in the computer science world. (pretty straight-forward - not much to elaborate on, but this is a big deal) Now onto other aspects of the decision. I originally got into computer science because of programming. I started in high school and knew very soon that it was what I wanted to do for a career. I feel like getting a masters and being a software engineer in the industry gives me much more time to program in my career. In research, I feel like I would spend more time reading, writing, trying to get grant money, etc than I would coding. A guy I work with in the lab just recently published a paper. He showed it to me and I was shocked by it. The first two pages was littered with equations and formulas. Then the next page or so was followed by more equations and formulas that he derived from the previous ones. That was his work - breaking down and creating all of these formulas for robotic arm movement. And whenever I read computer science papers, they all seem to follow this pattern. I always pictured myself coding all day long…not proving equations and things of that nature. I know that's only one part of computer science research, but that part bores me. A couple cons on each side - Phd - I don't really enjoy writing or feel like I'm that great at technical writing. Whenever I'm in groups to make something, I'm always the one who does the large majority of the work and then give it to my team members to write up a report. Presenting is different though - I don't mind presenting at all as long as I have a good grasp on what I am presenting. But writing papers seems like such a chore to me. And because of this, the "publish or perish" phrase really turns me off from research. Another bad thing - I feel like if I am doing research, most of it would be done alone. I work best in small groups. I like to have at least one person to bounce ideas off of when I am brainstorming. The idea of being a part of some small elite group to build things sounds ideal to me. So being able to work in small groups for the majority of my career is a definite plus. I don't feel like I can get this doing research. Masters - I read a lot online that most people come in as engineers and eventually move into management positions. As of now, I don't see myself wanting to be a part of management. Lets say my company wanted to make some new product or system - I would get much more pride, enjoyment, and overall satisfaction to say "I made this" rather than "I managed a group of people that made this." I want to be a big part of the development process. I want to make things. I think it would be great to be more specialized than other people. I would rather know everything about something than something about everything. I always have been that way - was a great pitcher during my baseball years, but not so good at everything else, great at certain classes in school, but not so good at others, etc. To think that my career would be the same way sounds okay to me. Getting a PhD would point me in this direction. It would be great to be some guy who is someone that people look towards and come to ask for help because of being such an important contributor to a very specific field, such as artificial neural networks or robotic haptic perception. From what I gather about the software industry, being specialized can be a very bad thing because of the speed of the new technology. I When it comes to being employed, I have pretty conservative views. I don't want to change companies every 5 years. Maybe this is something everyone wishes, but I would love to just be an important person in one company for 10+ (maybe 20-25+ if I'm lucky!) years if the working conditions were acceptable. I feel like that is more possible as a PhD though, being a professor or researcher. The more I read about people in the software industry, the more it seems like most software engineers bounce from company to company at rapid paces. Some even work like a hired gun from project to project which is NOT what I want AT ALL. But finding a place to make great and important software would be great if that actually happens in the real world. I'm a very competitive person. I thrive on competition. I don't really know why, but I have always been that way even as a kid growing up. Competition always gave me a reason to practice that little extra every night, always push my limits, etc. It seems to me like there is no competition in the research world. It seems like everyone is very relaxed as long as research is being conducted. The only competition is if someone is researching the same thing as you and its whoever can finish and publish first (but everyone seems to careful to check that circumstance). The only noticeable competition to me is just with yourself and your own discipline. I like the idea that in the industry, there is real competition between companies to put out the best product or be put out of business. I feel like this would constantly be pushing me to be better at what I do. One thing that is really pushing me towards a PhD is the lifetime of the things you make. I feel like if you make something truly innovative in the industry…just some really great new application or system…there is a shelf-life of about 5-10 years before someone just does it faster and more efficiently. But with research work, you could create an idea or algorithm that last decades. For instance, the A* search algorithm was described in 1968 and is still widely used today. That is amazing to me. In the words of Palahniuk, "The goal isn't to live forever, its to create something that will." Over anything, I just want to do something that matters. I want my work to help and progress society. Seriously, if I'm stuck programming GUIs for the next 40 years…I might shoot myself in the face. But then again, I hate the idea that less than 1% of the population will come into contact with my work and even less understand its importance. So if anything I have said is false then please inform me. If you think I come off as a masters or PhD, inform me. If you want to give me some extra insight or add on to any point I made, please do. Thank you so much to anyone for any help.

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  • SCCM deploy from VMware XP image

    - by HannesFostie
    We recently set up the latest version of SCCM and I managed to capture a .wim image from a virtual machine (build and capture task sequence). I want to use this .wim file to deploy winXP to different hardware, and therefor need to add device drivers to the task sequence. I created a driver package per laptop type, and deployed for the first time. However, I am getting a BSOD (0x00007B) which leads me to believe theres a problem with the storage drivers. After adjusting the task sequence to try and point to the mass storage drivers (which are applied at F6, I suppose) I do not get a list of compatible drivers (the list is empty). I looked around, and found some issues regarding hdc class drivers that are not recognized as mass storage drivers. The workaround suggested changing the INF file to make the driver a SCSIAdapter class driver, and importing these again, but to no avail. The list remains empty. Any help is much appreciated

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  • Which AMI should I use as a base for a Django application?

    - by Edan Maor
    I'm starting development of a Django application, on Amazon's Web Services. I'm looking to build an instance that will serve the Django. I don't have much experience with such things, having only used a shared host before (WebFaction). So I'm wondering, which AMI should I use as a base? I'm assuming I want an Ubuntu AMI, possibly with certain things like Apache pre-installed? One minor point: I'm planning to serve several different Django projects from the same instance. I use virtualenv on my dev machine right now to separate the different projects, I'm assuming I'll do the same on EC2. Thanks!

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  • ldap sync with outlook

    - by Dr Casper Black
    I have a task to research the possibilities of LDAP as a centralized Address Book. I have setup a openLDAP on debian 5.07. I managed to search the LDAP contacts from MS Outlook 2007 (with some drawbacks like Outlook cant recognize street and organization fields). My question is, is it possible ,& how, to sync data on LDAP server with applications that support LDAP? I could not find any data on this topic. EDIT: The point is, to have a centralized list of contacts that can be sync with various applications, for instance Outlook, Thunderbird, Phonebook on mobile phones...etc The Question is, Is it possible to transfer (update) data on a client application from LDAP database and viceversa? So not to search LDAP server data, but to download contact that are not available in the client application (Outlook) and upload data to LDAP if the contact is in (Outlook) and not in LDAP database and the other way around, in other words synchronize.

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  • How do I install Ubuntu 13.10 from a partition on my Mac?

    - by Barry
    I am trying to install Ubuntu 13.10 on my Macbook Air. I've previously had no issue installing from a USB stick to this machine. However, I don't currently have access to a USB stick or any external media at all! What I've done so far is partitioned my SSD into 3 partitions. One holds OS X, another is a 5gb partition intended for the install ISO, and a third is intended to be the target for that install. The second two partitions are formatted as FAT. I've used dd (with and without bs=1m) to "burn" my ISO to the small 5gb FAT partition. I also at one point tried using hdituil to convert my ISO file to IMG and went through the same process with same result below. After "burning" my ISO to the small partition, I reboot into Refind. Refind sees my small 5gb partition perfectly well, and when I select that partition it loads GRUB appropriately. However, from here, regardless of what I choose, Ubuntu will start to load and then after a few minutes crash out to: BuzyBox V1.15.3 (Ubuntu 1:1.15.3-1ubuntu5) built-in shell (ash) Enter 'help' for a list of built in commands. (initramfs) unable to find a medium containing a live file system. I've Googled this error and found a number of people encountering it when trying to install from USB, but no solutions seem applicable to my case (installing from a partition on my SSD, to another partition on my SSD). Is there any solution to this, or do I just need to wait a few days until I have access to a USB stick? Many thanks in advance, and apologies for length -- I figured I'd err on the side of being exhaustive rather than having people suggest things I've already tried.

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  • mod_rewrite works within directory not on root

    - by Anvesh Saxena
    I am having problem in my RewriteRule for the tags portion. What I am able to debug is that the rule is been triggered at least because the page "tags.php" is been rendered but without the URL parameters. This .htaccess file with the rules is within root for my sub-domain and has following content for tags postion. # Rewrite rule for tags RewriteRule ^tags/(\w+)/(\d+)/?$ tags.php?tag_name=$1&tag_id=$2 RewriteRule ^tags/(\w+)/?$ tags.php?tag_name=$1 RewriteRule ^tags/?$ tags.php?tag_name= Another problem that I ain't able to debug is that the similar .htaccess file exists for a directory within my sub domain and is working as expected with the necessary URL parameters also been available. The .htaccess file within the directory reads as follows # Rewrite rule for tags RewriteRule ^tags/(\w+)/(\d+)/?$ restAPI.php?type=tags&tag_name=$1&tag_id=$2 RewriteRule ^tags/(\w+)/?$ restAPI.php?type=tags&tag_name=$1 RewriteRule ^tags/?$ restAPI.php?type=tags&tag_name= Could anyone point me the problem that I might be having in my Rewrite rules, I am also facing Internal server error sometimes which I am second guessing is due to the linked problem. Note:- I have Apache version 2.2.23 on my shared hosting.

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  • Options for PCI-DSS on AWS - file integrity monitoring and intrusion detection

    - by Brill Pappin
    I need to deploy some file integrity monitoring and intrusion detections software on AWS instances. I really wanted to use OSSEC, however it does not work well in an environment where servers can auto deploy and shut down based on load, because it requires server managed keys to be generated. Including the agent in the AMI will not allow monitoring as soon as it comes up because of that. There are many options out there, and several are listed in other posts on this site, however none that I've seen so far deal with the unique problems inherent in AWS or cloud based deployments in general. Can anyone point me at some products, preferably open source, that we might use to cover those portions of PCI DSS that require this software? Has anyone else achieved this on AWS?

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  • Why doesn't this script work?

    - by Devin
    I've been using this bash script: for i in $(ls); do mv $i a$i; done to prepend all filenames in a folder with the letter a. I'm afraid that at some point I'll accidentally use this script in the wrong directory and prepend a ton of filenames that I don't want prepended. So I decided to explicitly cite the path to the file. So now my script looks like this: for i in $(ls /cygdrive/c/Users/path/to/Images); do mv /cygdrive/c/Users/path/to/Images/$i /cygdrive/c/Users/path/to/Images/a$i; done It does prepend the filename with the letter a, but it also appends the filename with this ? symbol. Any ideas why it would do that? If it helps any, I'm using cygwin on a Windows 7 box. Thanks for the help!

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  • Route an IP from WAN to a host on LAN on OpenWRT

    - by Zsub
    EDIT: I know how to use NAT, I specifically want the server to be reachable on two IP's, one private, one public, with the firewall of the OpenWRT in between, if feasible. At the office we have recieved a /29 from our ISP. The first address is reserved for their endpoint, so I'm free to use five addresses. We run a local network, so of course there is a router in between running OpenWRT to provide all hosts with (W)LAN (dhcp from a private range). However, we also have a server running OS X Server 10.6 (Snow Leopard) and I'd like that server to be accessible both from the LAN using a private IP as well as from the WAN on it's own public IP. Point of note is that the server only has one network port, so multiple NICs is not an option, unfortunately. How would I go about doing this?

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  • IBM x226 server with Windows 2003 freezing and showing one HDD degraded

    - by Zvonko Telefonko
    We have an IBM x226 server with Windows 2003 running on it. For weeks it's been very slow and it freezes at least once each day. At the boot it show message "degraded" for one HDD and optimal for other HDDs. We have 4 HDDs in it set up in Raid 1. HDD 1 - HDD 2, HDD 3 - HDD4. It seems that HDD2 is the one who is causing problems (showing degraded status). There's an amber led blinking on it together with the green one. We installed ServerRAID manager downloaded from IBM and it gave us option for "rebuild". But the server froze at some point and now it's rebuilding from start again. I've done some Googling and it says that it could be to failing HDD or some cache battery. How can we verify what is the cause of this?

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  • How to diagram custom programming languages, non textual?

    - by Adam
    I've used and created domain-specific languages before, plenty of times (e.g. using yacc/lex). Normally we'd start with grammar written in BNF, and a bunch of keywords. This is easy to do, easy to share. Recently, I've started working with diagrammatic programming languages - closest parallel is circuit-diagrams in electronics, where it's very difficult to express ideas in text, but very easy to express them in wiring-diagrams. This is a new and novel problem for me: how to efficiently express these mini-languages, and share concepts in them with colleagues? (i.e. how to whiteboard-program within them. Actual programming is easy - you have physical components to hand) Are there tools for this? Or good/best practices (e.g. equivalent of "always use BNF as starting point for your new DSL, and use tools like yacc to generate the parser, compiler, etc"). My googlefu is proving weak - all I get is false positives for wiring diagrams, and UML editors (since these are custom languages, UML doesn't seem to help)

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  • Automated backups for Windows Azure SQL Database

    - by Greg Low
    One of the questions that I've often been asked is about how you can backup databases in Windows Azure SQL Database. What we have had access to was the ability to export a database to a BACPAC. A BACPAC is basically just a zip file that contains a bunch of metadata along with a set of bcp files for each of the tables in the database. Each table in the database is exported one after the other, so this does not produce a transactionally-consistent backup at a specific point in time. To get a transactionally-consistent copy, you need a database that isn't in use.The easiest way to get a database that isn't in use is to use CREATE DATABASE AS COPY OF. This creates a new database as a transactionally-consistent copy of the database that you are copying. You can then use the export options to get a consistent BACPAC created.Previously, I've had to automate this process by myself. Given there was also no SQL Agent in Azure, I used a job in my on-premises SQL Server to do this, using a linked server configuration.Now there's a much simpler way. Windows Azure SQL Database now supports an automated export function. On the Configuration tab for the database, you need to enable the Automated Export function. You can configure how often the operation is performed for you, and which storage account will be used for the backups.It's important to consider the cost impacts of this as well. You are charged for how ever many databases are on your server on a given day. So if you enable a daily backup, you will double your database costs. Do not schedule the backups just before midnight UTC, as that could cause you to have three databases each day instead of one.This is a much needed addition to the capabilities. Scott Guthrie also posted about some other notable changes today, including a preview of a new premium offering for SQL Database. In addition to the Web and Business editions, there will now be a Premium edition that has reserved (rather than shared) resources. You can read about it all in Scott's post here: http://weblogs.asp.net/scottgu/archive/2013/07/23/windows-azure-july-updates-sql-database-traffic-manager-autoscale-virtual-machines.aspx

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  • How to write your unit tests to switch between NUnit and MSTest

    - by Justin Jones
    On my current project I found it useful to use both NUnit and MsTest for unit testing. When using ReSharper for running unit tests, it just simply works better with NUnit, and on large scale projects NUnit tends to run faster. We would have just simply used NUnit for everything, but MSTest gave us a few bonuses out of the box that were hard to pass up. Namely code coverage (without having to shell out thousands of extra dollars for the privilege) and integrated tests into the build process. I’m one of those guys who wants the build to fail if the unit tests don’t pass. If they don’t pass, there’s no point in sending that build on to QA. So making the build work with MsTest is easiest if you just create a unit test project in your solution. This adds the right references and project type Guids in the project file so that everything just automagically just works. Then (using NuGet of course) you add in NUnit. At the top of your test file, remove the using statements that refer to MsTest and replace it with the following: #if NUNIT using NUnit.Framework; #else using TestFixture = Microsoft.VisualStudio.TestTools.UnitTesting.TestClassAttribute; using Test = Microsoft.VisualStudio.TestTools.UnitTesting.TestMethodAttribute; using TestFixtureSetUp = Microsoft.VisualStudio.TestTools.UnitTesting.TestInitializeAttribute; using SetUp = Microsoft.VisualStudio.TestTools.UnitTesting.TestInitializeAttribute; using Microsoft.VisualStudio.TestTools.UnitTesting; #endif Basically I’m taking the NUnit naming conventions, and redirecting them to MsTest. You can go the other way, of course. I only chose this direction because I had already written the tests as NUnit tests. NUnit and MsTest provide largely the same functionality with slightly differing class names. There’s few actual differences between then, and I have not run into them on this project so far. To run the tests as NUnit tests, simply open up the project properties tab and add the compiler directive NUNIT. Remove it, and you’re back in MsTest land.

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  • What is the best free service to host images and mp3 files?

    - by Edward Tanguay
    I am making an educational social software silverlight application. I would like users to be able to point the application to a URL with text, images, and audio files which they have created. Many users will not have their own website to do this, so we are looking for a free service they can use to upload, and manage their own text/image/audio content. What is the best free service for non-technical users to upload and make available text, images and audio? For instance, sites.google.com allows you to upload pictures and access them via http so that would work, but that is more about making a website. For this purpose we just need the ability to upload files, without the website creation tools.

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  • How Can I Effectively Interview an Oracle Candidate?

    - by Tim Medora
    First, I browsed through SO for matching questions and didn't find one, but please point me in the right direction if this exact question has already been asked. I work with and around programmers of various skill levels on various platforms. I would consider my skills to be strong in terms of relational database design, query development, and basic performance tuning and administration. I'm mid-level when it comes to database theory. My team is looking to me to ensure that we have the best talent on staff, in this case, an engineer experienced in Oracle administration. To me, a well-rounded database administrator, regardless of platform, should also be competent in developing against the database so that is also a requirement. However my database skills are centralized around SQL Server 200x with experience in a few other products like SAP MaxDB, Access, and FoxPro. How can I thoroughly assess the skills of an Oracle engineer? I can ask high-level database theory questions and talk about routine tasks that are common across platforms, but I want to dig deep enough that I can be confident in the people I hire. Normally, I would alternate very specific questions that have a right/wrong answer with architectural questions that might have several valid answers. Does anyone have an interview template, specific questions, or any other knowledge that they can share? Even knowing the meaningful Oracle-related certifications would be a help. Thank you. EDIT: All the answers have been very helpful so far and I have given upvotes to everyone. I'm surprised that there are already 3 close votes on this question as "off topic". To be clear, I am specifically asking how a MS SQL Server engineer (like myself) can effectively interview a person with different but symbiotic skills. The question has already received specific, technical answers which have improved my own database design and programming skills. If this is more appropriate as a community wiki, please convert it.

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  • Top tweets SOA Partner Community – November 2012

    - by JuergenKress
    Dear SOA partner community member Too many different product from Oracle, no idea how do they fit together? Get a copy of the Oracle catalog, an excellent overview of the Oracle middleware portfolio. BPM is a key solution to this portfolio. To position BPM to your customers you can find many use case ideas in the paper BPM 11g Patterns and industry specific value propositions for Financial Services & Insurance & Retail. Many more Process Accelerators (11.1.1.6.2) have become available. It is an excellent demo and starting point for BPM projects. Our SOA Suite team published the most important OOW presentation at the OTN website. The Oracle SOA proactive support team is running a series of blog posts about SOA and JMS Introductory. To become an expert in SOA, Bob highlighted the latest list of SOA books. For OSB projects we recommend the EAIESB OSB poster. Thanks to all the experts who contributed and shared their SOA & BPM knowledge this month again. Please feel free to send us the link to your blog post via twitter @soacommunity: Undeploy multiple SOA composites with WLST or ANT by Danilo Schmiedel Fault Handling Slides and Q&A by Vennester Installing Oracle Event Processing 11g by Antoney Reynolds Expanding the Oracle Enterprise Repository with functional documentation by Marc Kuijpers Build Mobile App for E-Business Suite Using SOA Suite and ADF Mobile By Michelle Kimihira A brief note for customers running SOA Suite on AIX platforms By Christian ACM - Adaptive Case Management by Peter Paul BPM 11g - Dynamic Task Assignment with Multi-level Organization Units By Mark Foster Oracle Real User Experience Insight: Oracle's Approach to User Experience Hope to see you at the Middleware Day at UK Oracle User Group Conference 2012 in Birmingham. Jürgen Kress Oracle SOA & BPM Partner Adoption EMEA To read the newsletter please visit http://tinyurl.com/soanewsNovember2012 (OPN Account required) To become a member of the SOA Partner Community please register at http://www.oracle.com/goto/emea/soa (OPN account required) If you need support with your account please contact the Oracle Partner Business Center. Blog Twitter LinkedIn Mix Forum Technorati Tags: SOA Community newsletter,SOA Community,Oracle SOA,Oracle BPM,BPM Community,OPN,Jürgen Kress

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  • Website deployment - managing user-uploaded content?

    - by Legion
    I'm a programmer by trade, "server administrator" by company necessity. We're looking at dumping the old painful "update site by FTP upload" style of deployment. Having the webserver check out the latest code base from version control into a folder and having a "current" symlink point to the latest checkout (allowing for easily stepping back to an older version by changing the symlink) seems to be the way we want to go. But I have a question: what's a good practice for dealing with user-uploaded content? This stuff isn't in version control. I have a couple of ideas for dealing with this, but what is the smart, accepted practice?

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  • Windows 7 Bluetooth Configuration

    - by ahsteele
    I have Bluetooth installed in my laptop. The Bluetooth is enabled according to the status light. However, I do not see Bluetooth listed in device manager or have a control panel option for it. A scan for new hardware doesn't turn up Bluetooth. Nor are any devices listed with a Yellow Exclamation Point. I do have three USB Hubs Listed as "Generic USB Hub." There is no Bluetooth icon in the notification area and Bluetooth is not listed under Devices and Printers. What am I missing?

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  • Augmenting functionality of subclasses without code duplication in C++

    - by Rob W
    I have to add common functionality to some classes that share the same superclass, preferably without bloating the superclass. The simplified inheritance chain looks like this: Element -> HTMLElement -> HTMLAnchorElement Element -> SVGElement -> SVGAlement The default doSomething() method on Element is no-op by default, but there are some subclasses that need an actual implementation that requires some extra overridden methods and instance members. I cannot put a full implementation of doSomething() in Element because 1) it is only relevant for some of the subclasses, 2) its implementation has a performance impact and 3) it depends on a method that could be overridden by a class in the inheritance chain between the superclass and a subclass, e.g. SVGElement in my example. Especially because of the third point, I wanted to solve the problem using a template class, as follows (it is a kind of decorator for classes): struct Element { virtual void doSomething() {} }; // T should be an instance of Element template<class T> struct AugmentedElement : public T { // doSomething is expensive and uses T virtual void doSomething() override {} // Used by doSomething virtual bool shouldDoSomething() = 0; }; class SVGElement : public Element { /* ... */ }; class SVGAElement : public AugmentedElement<SVGElement> { // some non-trivial check bool shouldDoSomething() { /* ... */ return true; } }; // Similarly for HTMLAElement and others I looked around (in the existing (huge) codebase and on the internet), but didn't find any similar code snippets, let alone an evaluation of the effectiveness and pitfalls of this approach. Is my design the right way to go, or is there a better way to add common functionality to some subclasses of a given superclass?

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  • How can I delete, break, or otherwise convert cross references to simple text in microsoft word 2013

    - by Mr Purple
    Cross referencing figure and table captions is useful while editing a document but can become confude when copying and pasting between large documents. I need to pass my document to a colleague who will collate my document with others and has requested that I remove or delete any cross referencing so that my "correct" cross references do not interfere or get interfered with by any other cross references that may be in my colleagues master collated document. My document will be cut and pasted into the master and no further complicated instructions after that point will be tolerated by my colleague. Is there a simple way to convert my cross references to simple text? I am using microsoft word 2013.

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  • Php profiling on production server or other options

    - by absentx
    Alright I need some help here. I am commonly asked to speed up certain sections of some websites that I program for. I have yet to be able to figure out how to use a good php diagnosis/profiling tool. Some things to consider: The sites I am working on are already built, getting a testing server set up locally is just a huge pain..I have to rewrite include paths and just so many things. This is a results oriented deal and spending days to get a site fully working on a testing platform so I can debug one page probably isn't an option. I can write tons of php, but I have no clue how to interact or mess with servers. So every tutorial I read about setting up xdebug or xhprof all seem to involve getting something installed on a production server that I don't have access to or have no clue how to work with. So are there any solutions out there that will show me where my php is slow without having to do all sorts of server stuff that I just don't know how to do? Xhprof seems to be the closest to useable for me but from what I can tell it still has to be installed on a server. If anyone can just point me in the right direction on this I would be very grateful. Maybe getting these things put on the server isn't a big deal...but I have never interacted with server command lines or anything like that. I suppose I should start sometime but I really have no idea where to start. Plus I realize that profiling on a live platform is not the greatest idea either but I feel I am in a tough spot. I have speed issues to solve and setting up a local environment while a great idea, just doesn't seem real practical at the moment.

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  • Zoom Layer centered on a Sprite

    - by clops
    I am in process of developing a small game where a space-ship travels through a layer (doh!), in some situations the spaceship comes close to an enemy space ship, and the whole layer is zoomed in on the two with the zoom level being dependent on the distance between the ship and the enemy. All of this works fine. The main question, however, is how do I keep the zoom being centered on the center point between the two space-ships and make sure that the two are not off-screen? Currently I control the zooming in the GameLayer object through the update method, here is the code (there is no layer repositioning here yet): -(void) prepareLayerZoomBetweenSpaceship{ CGPoint mainSpaceShipPosition = [mainSpaceShip position]; CGPoint enemySpaceShipPosition = [enemySpaceShip position]; float distance = powf(mainSpaceShipPosition.x - enemySpaceShipPosition.x, 2) + powf(mainSpaceShipPosition.y - enemySpaceShipPosition.y,2); distance = sqrtf(distance); /* Distance > 250 --> no zoom Distance < 100 --> maximum zoom */ float myZoomLevel = 0.5f; if(distance < 100){ //maximum zoom in myZoomLevel = 1.0f; }else if(distance > 250){ myZoomLevel = 0.5f; }else{ myZoomLevel = 1.0f - (distance-100)*0.0033f; } [self zoomTo:myZoomLevel]; } -(void) zoomTo:(float)zoom { if(zoom > 1){ zoom = 1; } // Set the scale. if(self.scale != zoom){ self.scale = zoom; } } Basically my question is: How do I zoom the layer and center it exactly between the two ships? I guess this is like a pinch zoom with two fingers!

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  • Secure Server Distro

    - by Drama
    Hello, I have a root-server (i7/24GB/1TB) running Ubuntu 10.04 LTS as my OS. After some security audits (OpenVAS, Retina etc) I see that Ubuntu isn't the most secure system for a semi-corporate environment. Its updated from many sources, ofc from the Ubuntu security repo too. But nevertheless I could exploit my OpenSSL install with an exploit from August/September. There are some critical updates needed which Ubuntu does not provide. I was using Debian and Ubuntu for almost 5 years but now I doubt. What distro is secure and up to date from your point of view? How can I make the server more secure? Outsourcing of every software-module to a VM? I am not new to server-hardening, my packages are up to date I read Ubuntu Security Notices and I have no unneeded services installed on my server. Thanks.

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