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  • What are some good examples of using pass by name?

    - by Paul
    When I write programs I using pass by value or pass by reference always seem to be logical methods. When learning about different programming languages I came across pass by name. Pass by name is a parameter passing method that waits to evaluate the parameter value until it is used. See Stack Overflow pass by name question for more information on the method. What I would like to know is: what are some good examples and/or reasons to use pass by name and should it be re-introduced into some more modern languages.

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  • Maya is lagging in a specific way...?

    - by Aerovistae
    My Maya installation worked perfectly. It is not my computer. Something caused it to stop working overnight, somehow. When I try to drag a vertex or something like that, it moves the vertex, but then I have to click like 3 times somewhere outside the mesh before the actual mesh will catch up and follow the vertex. Until I do that, it just stays as it was, with a floating vertex somewhere inside it or outside it. It makes modeling borderline impossible and completely infuriating. What ought to be happening is what we're all used to-- as I move the vertex, the mesh follows it actively, so I can see what it looks like at every given moment until I release the vertex in its new position. Other weird thing: this only applies to complex meshes, like a couple thousand faces. A simple cube works fine. What gives?? Anybody?

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  • default mount point changed for external HD

    - by JhmL
    The default mount point for my external HD changed when upgrading from 13.04 to 13.10. Now the username is added as an extra level before the hd label. So it used to be /media/nameofhd and now it became /media/username/nameofhd This breaks a lot of links I have set up to this disk. I know that I can mount it manually and even automatically through /etc/fstab. What I want to know is why this behaviour changed and how I can change it back to the original? blkid and fdisk don't show anything suspicious. thx!

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  • I need a flexible VPS like gandi.com [duplicate]

    - by Sharen Eayrs
    This question already has an answer here: How to find web hosting that meets my requirements? 5 answers What are the alternative? I do not ask for which one you recommend. I am simply asking for list of similar service. That being said if there is any you've used and happy with please let me know. This is what I am considering http://en.gandi.net/ Some says it's overpriced. It's like amazon aws I think. So I need VPS hosting where I can easily change the CPU requirement, etc.

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  • What should I think about when switching from Python to Java?

    - by Nick Rosencrantz
    I was a Java developer in the early 2000s, switched to Python in 2008 and now Iäm working in Java again. Is there anything special you think I should keep in mind when going back to a Java environment? I used to work with EJB 1.0, I didn't work with EJB 2.0 and now we have JPA instead. I'm comfortable programming in Java and my new job with Java is much better than my Python job even though Python is my favorite language the tools and others things about my Java job makes it much better. I found when I searched jobs that demand for Java developer was much greater than demand for Python programmers- do you have a similar experience? Thank you

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  • Kernel panic when booting from USB

    - by maaartinus
    I downloaded ubuntu-11.04-desktop-amd64.iso and used Universal-USB-Installer-1.8.6.3.exe to format my USB stick und put the ISO on it. When I tried to install from it, I've got a kernel panic just like here, except for the version number (mine was 2.6.38-8-generic #42-ubuntu). My ISO image seems to work, as I installed it into a VMWare player without problems. Booting Linux from USB works surely too, as I did it some time ago with an older Ubuntu version. I can imagine things to try out, e.g., write the image again, try another version, pray, look for patches, etc. However, I'm looking for a time-efficient solution, something what most probably works. An advice of the sort "wait two weeks until it's surely fixed, then download again" is acceptable, I'm determined to switch to Linux, but it can wait a bit.

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  • I want to fix a bug. Where do I start?

    - by Ingo Gerth
    Although I am not a professional programmer, I have written a program or two. Yet, nowadays every engineer and scientist learns to program a bit as well, and as such I am used to writing programs in Python, C and MATLAB. Now I want to give back a bit to Ubuntu and its great folks and fix a bug! I had a look at the list of the bitesize campaign and had to find that most of them are not that easy for me to fix as I suspect they require a lot of time to get into the matter, and I do not have that. Still I discovered this one and it looks manageable and like a cool feature to me. As I have never written a patch or released a program to the wild before though, I have no idea where to start. What should be my first step to tackle that problem? Bottom line: Where and how do I start fixing that guy?

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  • =~ (equal-sign tilde) and m" ... " in .htaccess directive

    - by Lèse majesté
    I saw this bit of code on an old forum post: SSLRequire %{HTTP_HOST} =~ m"\.secure\.powweb\.com" And I was just wondering what the =~ and m" ... " meant. I've been searching online and in the Apache documentation for any mention of the equal-sign tilde operator, but I've found no mention of it. I know that some directives can take a tilde to use a regular expression, but I've never seen the m" ... " form used before. What exactly is that m" ... " for? Where else would you see this form?

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  • Ubuntu 12.04 LTS - Black Screen at boot After changing Nvidia Driver

    - by nDman
    2 days ego i updated my Ubuntu 12.04 LTS to latest updates but i ignored Grub Updating because I thought it will clear my grub settings (I'm so noob!). After restart every things was right, the Ubuntu started normally and every things was working well except graphic which had problem before update. I had the experimental driver before but I changed it to the current-update version. After restart Ubuntu stock on black screen. I tried to reinstall Nvidia driver from recovery but it not worked. Then i used Update Grub in recovery, it not worked too but i see this line on screen at boot: at this time it stops and keyboard not working, but when I push the power button it shows these lines and it will shutdown. OK finally I made it start with older kernel (3.5.0-28-generic). Now how can I keep this kernel or fix Ubuntu to work with new kernel? Should I reinstall Nvidia driver? Which version should I use?

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  • Dropdowns revisited

    For my DIBI presentationI need a dropdown menu (in order to compare it on desktop and mobile), so I wrote one.Point is, it took me thirty lines of JavaScript, nine of which only contain a closing },and three of which deal with the fact that bloody Firefox still doesn’t support contains().Net amount of lines: 18. Can somebody please remind me why we all used to think dropdownsare so extremely complicated? I can’t for the life of me figure it out.window.onload = function () { document.getElementById('dropdown').onmouseover...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Usefulness of blogs for multi language ecommerce site

    - by jawilson
    I have a multi-language ecommerce site for which I am trying to improve its online marketing. There's currently a blog for the english shop, on a subdomain, which doesn't really get very much traffic. I'd been recommended to set up blogs for each of the different language shops and try to generate traffic to each of the blogs. I'm wondering if this is really worth the effort and cost (blog devt costs and ongoing translations required). Does anyone have any experience/advice on this at all? Perhaps where they've used this approach successfully or otherwise?

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  • What does it mean for SVN "to pollute the local source tree"?

    - by asd
    I'm reading "Professional Team Foundation Server 2010" by Wrox, and in an advantages/disadvantages list, the said: "Like CVS, SVN makes use of .svn directories inside the source folders to store state of the local working copy, and to allow synchronization with the server. However, it can have the affect of polluting the local source tree, and can cause performance issues wiht very large projects or files." What does the bit about pollution mean? I've used SVN for C# & ASP.NET projects for a long time and haven't encountered any problems. What probably does this quote think I should have been watching out for?

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  • Best way of accessing data on different pages

    - by Gaz83
    I'm looking for a way to load data into properties/variables etc and have this information accessible to all the pages of my app. I want the information to be loaded via a background thread to keep UI thread free. Some of the pages will have various properties of their controls binding to these global properties. Here is what I tried. Created a static class. All pages could access the data but can't bind. Changed the static class to a Singleton and used DependencyProperty's. All pages could access data and binding worked fine but cross-threading issues when accessing via background threads. I have read in various places on this subject but haven't really come up with the best method yet for my situation.

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  • Converting Celsius Processor Temperature to Fahrenheit

    - by WindowsEscapist
    I'm editing a Conky theme. I would like it to output the processor temperatures in degrees Fahrenheit instead of Celsius. In the ~/.conkyrc file, the command sensors | grep 'Core 0' | cut -c18-19 is used to find the temperature in Celsius for the first processor core. I want to use bc to compute this (give it outputvalue*9/5+32). Problem is, bc wants just absolute values, and I see no way to pass it program output. If I try to use something like temp=$(sensors | grep 'Core 0' | cut -c18-19) & echo 'temp*9/5+32' | bc, it ends up giving me 32 because it registers "temp" as a 0.

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  • How activity id affects calculations such as schedule % complete when using a baseline?

    - by Jeffrey McDaniel
    Fields such as schedule % complete, planned value costs, etc. that use a baseline to help determine the value depend on the activity id's to match between the baseline project and the current project. If the activity id is changed the link is broken. In the P6 power client there is an internal guid that allows you to change the activity id in either the baseline or current project and still have these values related. In the P6 Reporting Database the activity id is used as the joining characteristic between which activities are a match between a baseline project and a current project.

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  • Is Java "dead in the water" as a consequence of Oracle buying Sun and subsequently suing Google

    - by NimChimpsky
    Google has led many useful Java features (guava, gson); now that Oracle has purchased Sun will it effect its future enhancements and utilization as a development language. What exactly, or even approximately, are the legal ramifications? I thought Java was open source and would therefore remain unaffected ... ? Should Google just buy Oracle to get rid of the whole mess, that would be cool wouldn't it ? Do you think this is the beginning of the end for Java as a widely used language ? Its continued success as an open source/free technology is now doubtful?

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  • Trouble Setting up Open SSH with Putty

    - by warpstack
    I for the life of me can't seem to get openSSH to work on Ubuntu Server 10.10 with keys I generated in PuttyGen on my Windows machine. After hours of trial and error and web searches I can't get my ssh service to accept my private key! Here is my sshd_config. I generated my public and private keys using Putty in Windows then used a ssh connection to paste my key from putty directly into my authorized_keys2 file located in */etc/ssh/publickeys/authorized_keys2* The authorized_keys2 file looks something like: ssh-rsa AAAAB3NzaC1yc2EAAAA... with no email or anything at the end of it. I just pasted it straight from PuttyGen without using a key comment. I feel like it's not working because of some nuance I am not understanding or some unusual setting or incompatibility. I've restarted the ssh service (and the machine) to no avail. What are some common pitfalls I might have gotten myself into? Is there a simpler way to generate ssh keys that putty can use in windows?

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  • Why a write-enable ring?

    - by SpashHit
    Here's an "interview question" that while ostensibly about hardware really does inform a software design principal as well. Computers used to (still do I guess, somewhere) use magnetic tape reels to store data. There was a plastic accessory you could attach to a tape reel called a "write-enable ring". If the tape had such a ring, the tape drive allowed writing to the tape... if not, it only allowed read access. Why was the choice to design the system in this way? Why not have a "write protect ring" instead, with the opposite effect?

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  • How do I install Ubuntu on an HP Touchsmart 600?

    - by user70004
    I have a hp touchsmart 600 pc series. I tried to install the lastest version of ubuntu (12.04 LTS, 64bits) but it would not install. I popped in the cd and the menu asked for a reboot. Which I did. As ubuntu was about to install(purple background with 2 symbols underneth) the screen was dark and a prompt kept blinking for like over 10 minutes. So I turned off my pc and loaded my window os. I ran ubuntu again and used the help install feature. Needless to say the same thing happen again! does ubuntu work on hp touchsmart computers?

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  • How to access localhost remotely - Wordpress?

    - by Marcappuccino
    I have installed a LAMP stack (sudo tasksel install lamp-server) and wordpress (sudo apt-get install wordpress), but now, I would like to access my server remotely, to be used as a home fileserver. For example, my public ip is 82.16.xxx.xxx. Opening it in firefox with the suffix :8080 brings up my router config page..? Do I have to set up port forwarding? BTW. Accessing via localhost/wordpress/ works fine, I would just like to access my files while away from home.

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  • Ideal laptop specs for a Computer Science Masters student? [closed]

    - by Ayush
    I have a HP pavillion core 2 duo 2 GHz and 4 GB RAM, and it is painful to use this machine for any kind of coding. Eclipse (especially Juno) literally takes 5 minutes to load. And even after that, everything is lagy. Apart from school stuff, I also use my computer as a television. I watch Hulu, Netflix, YouTube etc in 720p, and this laptop gets hot as hell and the fans are loud enough to wake somebody up from deep sleep. I DON'T use my laptop for Gaming or Video/Photo Editing. I'm looking to buy a new laptop (in which most widely used IDEs would work smoothly and playing hi-def videos wouldn't be too much for the machine to handle) any suggestions (on hardware specs) would be greatly appreciated. Thanks

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  • www.domain redirecting to google?

    - by aayush
    Note: A while back i had no place to host my domain, then via namecheap i set it to forward my domain to google I bought webhosting again today and everything was working fine. I set up vhosts and set up www.domain as the server alias. Both worked. Then i tried to set up a alternate subdomain test.domain, but failed (I did it by creating a alternate vhost right below the current one) as it kept redirecting to google. As a test, i replaced the www with test in serveralias, it still redirected to google but now even www redirects to google. I am using cloudflare, and i am really confused how to go about this. I tried listing www as a cname and as a A record, still redirecting to google. I tried checking via proxies e.t.c, its universal and hence not a problem of my PC. Please help, i am really distressed by this. I am running a ubuntu 13.10 x32 stack with LAMP. Here is what my domain.com.conf file looks like <VirtualHost *:80> # The ServerName directive sets the request scheme, hostname and port that # the server uses to identify itself. This is used when creating # redirection URLs. In the context of virtual hosts, the ServerName # specifies what hostname must appear in the request's Host: header to # match this virtual host. For the default virtual host (this file) this # value is not decisive as it is used as a last resort host regardless. # However, you must set it for any further virtual host explicitly. ServerName domain.com ServerAlias www.domain.com ServerAdmin webmaster@localhost DocumentRoot /var/www/domain.com/public_html # Available loglevels: trace8, ..., trace1, debug, info, notice, warn, # error, crit, alert, emerg. # It is also possible to configure the loglevel for particular # modules, e.g. #LogLevel info ssl:warn ErrorLog ${APACHE_LOG_DIR}/error.log CustomLog ${APACHE_LOG_DIR}/access.log combined # For most configuration files from conf-available/, which are # enabled or disabled at a global level, it is possible to # include a line for only one particular virtual host. For example the # following line enables the CGI configuration for this host only # after it has been globally disabled with "a2disconf". #Include conf-available/serve-cgi-bin.conf </VirtualHost> There is a valid index.php file at the end of the documentroot aswell. The website in question is aayushagra.com Edit: On cloudflare i tried removing the www entirely, and it still sent me to google Edit: Zone file ;; Domain: aayushagra.com ;; Exported: 2013-11-03 07:37:52 ;; ;; This file is intended for use for informational and archival ;; purposes ONLY and MUST be edited before use on a production ;; DNS server. In particular, you must: ;; -- update the SOA record with the correct authoritative name server ;; -- update the SOA record with the contact e-mail address information ;; -- update the NS record(s) with the authoritative name servers for this domain. ;; ;; For further information, please consult the BIND documentation ;; located on the following website: ;; ;; http://www.isc.org/ ;; ;; And RFC 1035: ;; ;; http://www.ietf.org/rfc/rfc1035.txt ;; ;; Please note that we do NOT offer technical support for any use ;; of this zone data, the BIND name server, or any other third-party ;; DNS software. ;; ;; Use at your own risk. ;; $ORIGIN aayushagra.com. @ 3600 IN SOA aayushagra.com. root.aayushagra.com. ( 2013110301 ; serial 7200 ; refresh 3600 ; retry 86400 ; expire 3600) ; minimum ;; MX Records aayushagra.com. 300 IN MX aayushagra.com. ;; CNAME Records direct.aayushagra.com. 300 IN CNAME aayushagra.com. ;; A Records (IPv4 addresses) www.aayushagra.com. 300 IN A 146.185.140.31 aayushagra.com. 300 IN A 146.185.140.31

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  • Questionable ethics regarding closed source softwares which are supposed to be open source.

    - by edem
    Several days ago I heard a sentence "Cracking company name routers are not a crime.". I asked "Why?" and the guy explained to me that company name used a linux distribution on their routers which source can not be closed because of their license but company name closed it. What do you think about this? Doing otherwise unethical "cracking" becomes ethical, or somewhat neutral if the software in question is "cracked" too? By "cracking" I don't mean breaking into a computer through someones' company name router but "cracking" my own router's OS which otherwise would be unethical.

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  • Tester/Doer pattern: Assume the caller conforms to the pattern or be defensive and repeat the check?

    - by Daniel Hilgarth
    Assume a simple class that implements the Tester/Doer pattern: public class FooCommandHandler : ICommandHandler { public bool CanHandle(object command) { return command is FooCommand; } public void Handle(object command) { var fooCommand = (FooCommand)command; // Do something with fooCommand } } Now, if someone doesn't conform to the pattern and calls Handle without verifying the command via CanHandle, the code in Handle throws an exception. However, depending on the actual implementation of Handle this can be a whole range of different exceptions. The following implementation would check CanHandle again in Handle and throw a descriptive exception: public void Handle(object command) { if(!CanHandle(command)) throw new TesterDoerPatternUsageViolationException("Please call CanHandle first"); // actual implementation of handling the command. } This has the advantage that the exception is very descriptive. It has the disadvantage that CanHandle is called twice for "good" clients. Is there a consensus on which variation should be used?

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  • Which creative framework can create these games? [closed]

    - by Rahil627
    I've used a few game frameworks in the past and have run into limitations. This lead me to "creative frameworks". I've looked into many, but I cannot determine the limitations of some of them. Selected frameworks ordered from highest to lowest level: Flash, Unity, MonoGame, OpenFrameworks (and Cinder), SFML. I want to be able to: create a game that handles drawing on an iPad create a game that uses computer vision from a webcam create a multi-device iOS game create a game that uses input from Kinect Can all of the frameworks handle this? What is the highest level framework that can handle all of them?

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