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• How do you reset the range of available ports that libvirt autoport can use?

  - by bcmcfc

  Libvirt is using its autoport setting to automatically allocate ports within a range starting at 5900. Example excerpt from an XML configuration for a VM: <graphics type='spice' port='6000' autoport='yes' listen='127.0.0.1' keymap='en-gb'> <listen type='address' address='127.0.0.1'/> </graphics> Currently, there are free ports at various points within the range 5900 to 5999. However, newly booted VMs are picking up ports from 6000 on. I need for it to reuse the available ports in the 59xx range. Is this possible? If so, how do I do this? The problem arose because VMs are being accessed via websockets, and it tried to use 6000 which is a reserved port for X11. A solution that explains how to blacklist ports from being picked up by autport would also be sufficient.

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• Migrating a simple application from Application Delegate to ViewController Class

  - by eco_bach

  Hi Frst of all wanted to send out a huge thanks for the great feedback and support. I have a simple application working, right now simply loads a sequence of images and alows the user to step thru the images by clicking a button. All of my logic is in my Application Delegate class, with the image loading, initialization of UIImage Views etc happening in my applicationDidFinishLaunching method. My next step is to migrate as much as possible all of the logic from this class to a ViewController, to take advantage of the extra functionality etc in viewcontrollers. All my images and imageViews are initialized like the following in my applicationDidFinishLaunching. img = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@image1.jpg" ofType:nil]]; imgView = [[UIImageView alloc] initWithImage:img]; How would I migrate this to a ViewController based application? Where would I put all of the logic currently in my applicationDidFinishLaunching method, or for loading of images, is it necessary to only load them here? Any feedback, tips, suggestions appreciated.

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• Hiring a project or development manager: what are good interview questions?

  - by Totophil

  What questions would you ask a candidate applying for a software project or development manager position? Please could you submit one question per answer (with multiple answer if necessary) or a sequence of related questions. This way eventually all questions will get ordered by how good we all think they are. Please also provide a short guidance for evaluating possible answers. UPDATE: It seems that a large proportion of the answers so far are aimed at generic management skills. What would you ask someone who is going to manage software development, let's say in your organisation? What knowledge, skills and attitude will you be looking for in the candidate replies?

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• SSL/https setup for herokuapp.com address rather than my actual domain

  - by new2ruby

  I have a subdomain of my site pointed to a rails app at mysite.herokuapp.com. I bought a certificate from godaddy and seem to have that all set up correctly. So that when I go to: http://mysite.herokuapp.com or http://dev.mysite.com it's redirected to: https://mysite.herokuapp.com or https://dev.mysite.com The problem is that when I visit dev.mysite.com, I get the error: Safari can't verify the identity of the website. But when I go to mysite.herokuapp.com, I don't get the error. I wanted this to be set up the other way, so that dev.mysite.com did not cause the error. I'm not sure where I went wrong. I used dev.mysite.com when generating the key and when setting it up at godaddy.com. Any ideas where I should look? P.S. The old site is hosted at dreamhost and the DNS info is stored there as well. So I created a subdomain there of type cname which points to mysite.herokuapp.com.

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• Is there a free code coverage tool suitable for use with .NET 4 and NUnit?

  - by Damian Powell

  Is there a free code coverage tool suitable for use with .NET 4 and NUnit that runs from the command line (and is thus suitable for use on a build server)? Please note that any tools that require editions of Visual Studio higher than Professional are not appropriate in this case. I am asking this question because I can't get NCover 1.5.8 to work with NUnit 2.5.5 on a .NET 4 C# app. I can run the unit tests, and I can generate a Coverage.Xml file, but it is empty - it contains no sequence points. After a lot of research, I have concluded that this is because NCover 1.5.8 simply doesn't work with .NET 4. However, if you know better, please feel free to answer this question from another user.

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• Problem with sendkeys in .NET

  - by AvidProgrammer

  I have a windows application, where I am using send keys to navigate from one window to another. My send key sequence is like activating another window with in my app, and sending key strokes to that window. But the key strokes I am sending is getting updated in the same window where I am activating the other window. But after few key strokes it is going to the other window. Seems like synchonization issue with send keys. Is there a way to specify the operation of the current send key is finished, before sending the next sendkey.

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• Adding SSL to Heroku site post launch

  - by dineth

  I have a rails API that I want to deploy on Heroku. $20/month for a SSL site on heroku is a little steep given I am not earning anything out of this app yet. I am after advice and wondering if it is possible to add SSL sometime in the future? This is for a iOS app that I'm writing. Basically the idea would be that I continue to use https://myapp.heroku.com through their piggyback SSL. Once I get some cash in, I want to transition to using https://www.myapp.com. At this point the API would still need to work for app users who haven't upgraded to a new version of the app that points to the new domain. Anyone know if this is possible? Would both URLs continue to work? My gut feeling tells me this is not possible. Any advice would help. Thanks!

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• Split number and put each digit to separate html element

  - by Seven

  The problem is that I do not know how to break the loop for the first number and start again for the next one. Currently, one span.nNumber has a total digits of the two numbers (123456) and the next span.nNumber contains digits only from another number (456). Goal is to create sequence 123 and 456: <span class='nNumber'> <span>1</span> <span>2</span> <span>3</span> </span> and <span class='nNumber'> <span>4</span> <span>5</span> <span>6</span> </span> Example script: http://jsfiddle.net/PZ8Pt/2/

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• Can I run my MacBook in clamshell mode without being connected to power?

  - by kch

  Hi, At home, I run my MacBook in clamshell mode (closed lid, external display). This works fine when you're connected to the power adapter, but it doesn't work when running on battery. That's how it's supposed to be and Apple has some kb entry on the issue. But it's also lame. You can prevent the machine from sleeping when closed by running InsomniaX, but then it'll assume the builtin display is still active, so you end up with a two-display setup when you really only want the external. This is obviously less than ideal. So, is there any work around, hack, utility, black magic that I can use to make it run in clamshell mode while strictly on battery power? Also, bonus points for a solution that makes the AC status not affect the machine state at all. (Like, you know, it does normally, when not in clamshell.)

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• jQuery get value from checked element with a given name

  - by Travis Leleu

  I've got an input like so: I'd like to use jQuery to grab that element, and add the function call foo() to the change event. Currently I can get it done, but there are two hacks involved. My (working) code: $(":input[name*=myfield]").change( function( $(":input[name*=myfield]") ) { foo(); }); )}; There are two hacks in there I'd like to eliminate. Keeping in mind that the input names are multidimensional arrays, how can I use the :input[name=somename], versus [name*=someone]? I'd imagine it's faster using an exact name rather than *=, but I can't get the escape sequence correct for the brackets on the multidimensional arrays. Can I chain the call together so that I don't have to select the element twice? Is the standard practice for that to select the HTML element into a var, then use that var? Or can I chain it together? Thanks for the help. Still working on getting my footing in JS/JQ.

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• Weird symbols on Mac

  - by Rich Bradshaw

  Since I've had my mac, I keep seeing this weird symbol. Till today, it had been only in the place of bullet points in OpenOffice.org. The first pictures shows this in a .doc file created on a Windows system. I thought nothing of it - just an annoyance. It appears no matter what the font. Real bullets appear if I delete the text and insert a bulletted list using the toolbar. Then, today I noticed in in iTunes - which seemed strange. Image 3 is a zoom of the character. It says on it: Private Use E000 F8FF. What is it (unicode related?), and how do I get the bullets working properly? Edit: The plot thickens... If I boot in Safe Mode, the symbols look like little snap boards like you'd have at the beginning of filming a scene in a film...

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• How to display SSH banner at login, but only for password authentication

  - by banjer

  I have a warning message that is displayed to a user after they enter their username to log in to our Linux servers. I only want to display this message for password authentications, and not when keys are used. It should only show to a user who is logging into a host, and not when they are sshing from one host to another (our hosts all have keys set up so we can ssh from one to another without entering passwords). Currently, I have a line for Banner in the /etc/ssh/sshd_config file which points to a text file containing the warning message. Banner doesn't appear to have any further config options, so I'm wondering if there is a way to do this with pam or some other mechanism? Thanks.

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• Custom "Very Long Int" Division Issue

  - by befall

  Hey everyone, So, for a very silly project in C++, we are making our own long integer class, called VLI (Very Long Int). The way it works (they backboned it, blame them for stupidity) is this: User inputs up to 50 digits, which are input as string. String is stored in pre-made Sequence class, which stores the string in an array, in reverse order. That means, when "1234" is input, it gets stored as [4|3|2|1]. So, my question is this: How can I go about doing division using only these arrays of chars? If the input answer is over 32 digits, I can't use ints to check for stuff, and they basically saying using long ints here is cheating. Any input is welcome, and I can give more clarification if need be, thanks everyone.

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• Controlling symbol generation in Clojure macros

  - by mikera

  I'm trying (as a self-learning exercise) to create a Clojure macro that will generate code to apply a function to a sequence of integers and sum the result, e.g. f(0) + f(1) + f(2) + f(3) This is my attempt: (defmacro testsum [func n] `(fn [x#] (+ ~@( map (fn [i] `(~func x#)) (range n))))) However something seems to go wrong with the x# gensym and I end up with two different versions of x and hence the function doesn't work: (macroexpand '(testsum inc 3)) gives: (fn* ([x__809__auto__] (clojure.core/+ (inc x__808__auto__) (inc x__808__auto__) (inc x__808__auto__)))) This is pretty much exactly what I want apart from the different 809 and 808 versions of x..... What am I doing wrong? I thought that the auto gensym was meant to create a single unique symbol for exactly this kind of purpose? Is there a better way of doing this?

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• How to Create a shortcut to files / folders on a drive with different / changing letters (root)?

  - by Rolo

  I have seen this question asked and answered many times but the location one usually desires to create the shortcut is on the actual drive with the different letters. I would like to create the shortcut on the drive with the permanent letter. So, let me explain further. I have a C Drive and a G Drive. The C Drive is always C and it's on a Windows XP computer. The G drive may be G today, but H tomorrow. How can I create a permanently working shortcut on the C Drive that points to the G, sometimes H, external hard drive? P.S. I am referring to an external hard drive, but I would also (not instead) be interested in the answer if it were a usb flash drive. (Keep in mind the shortcut is being created on the drive with the permanent letter). Thanks.

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• Setting up a DNS port redirect?

  - by Svetlana

  I have a domain using CloudFlare's DNS, I want to make it redirect to my server's IP (dynamic IP, port 21 blocked by ISP) which at the moment uses a No-IP DNS. The current setup is that I have a subdomain as a CNAME targetting the No-IP domain, but that only works for things like the Minecraft server (which looks for a set port that isn't blocked by my ISP), and I'd like a solution that lets me redirect port 21 from the CloudFlare domain to port 2121 on the No-IP domain, or something else that points to my dynamic IP, where an FTP server is already set up and running. I've had SRV records mentioned to me but without any further help, and it only made me more confused. Thanks in advance for the help.

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• How to sort a file with string lines by the number of a specific symbol in the line?

  - by SpacyRicochet

  Say I have a large plaintext file with a string on every line. The string only consists of alphabetical characters, except for underscores _, which divide the strings in syllables. I want to sort the text file by the amount underscores in the string. Bonus points for putting every group of X underscores in their own file. Example: hel_lo hi su_per_u_ser o_ver_flow would sort into: hi hel_lo o_ver_flow su_per_u_ser I've tried doing this with regex, but I've yet to find a proper way of counting the underscores (regex confuses me thoroughly). Anyone know how I could handle this?

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• How much power supply do I need for my server, and could a shortage be causing my odd crashing?

  - by dolan

  I have 5 servers, all with similar hardware (i7, four 2tb 7200rpm drives, two 4tb 5400rpm drives, 430 watt power supply), and lately the machines have been freezing up. This has gotten worse in the last day or so, and I can't pinpoint any explanation. One recent change was adding the two 4tb hard drives. The crashes happen most often while running a large Hadoop job, so I was originally thinking the load was causing some issues, but last night one server just froze without any heavy load on the box (or so I think), other than HDFS (Hadoop's distributed file system) was probably rebalancing itself since two of the five nodes were offline. If I plugin a monitor and keyboard to one of these frozen machines, I can't get any response or feedback on the screen. Any ideas on possible points of failure and/or different logs I can look at to investigate? Thanks Edit: The systems are running Ubuntu 10.04 Edit 2: More on hardware: intel core i7-930 bloomfield 2.8ghz processor (quad core) 12gb (6 x 2gb) kingston ddr3 1333 ram antec earthwatts green 430 power supply msi x58m lga 1366 motherboard

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• Database Modelling - Conceptually different entities with near identical fields

  - by Andrew Shepherd

  Suppose you have two sets of conceptual entities: MarketPriceDataSet which has multiple ForwardPriceEntries PoolPriceForecastDataSet which has multiple PoolPriceForecastEntry Both different child objects have near identical fields: ForwardPriceEntry has StartDate EndDate SimulationItemId ForwardPrice MarketPriceDataSetId (foreign key to parent table) PoolPriceForecastEntry has StartDate EndDate SimulationItemId ForecastPoolPrice PoolPriceForecastDataSetId (foreign key to parent table) If I modelled them as separate tables, the only difference would be the foreign key, and the name of the price field. There has been a debate as to whether the two near identical tables should be merged into one. Options I've thought of to model this is: Just keep them as two independent, separate tables Have both sets in the one table with an additional "type" field, and a parent_id equalling a foreign key to either parent table. This would sacrifice referential integrity checks. Have both sets in the one table with an additional "type" field, and create a complicated sequence of joining tables to maintain referential integrity. What do you think I should do, and why?

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• How to change x-axis min/max of Column chart in Excel?

  - by Ian Boyd

  Here i have a column chart of binomial distribution, showing how many times you can expect to roll a six in 235 dice rolls: Note: You could also call it a binomial mass distribution for p=1/6, n=235 Now that graph is kinda squooshed. i'd like to change the Minimum and Maximum on the horizontal axis. i'd like to change them to: Minimum: 22 Maximum: 57 Meaning i want to zoom in on this section of the graph: Bonus points to the reader who can say how the numbers 22 and 57 were arrived at If this were a Scatter graph in Excel, i could adjust the horizintal axis minimum and maximum as i desired: Unfortunately, this is a Column chart, where there are no options to adjust the minimum and maximum limits of the ordinate axis: i can do a pretty horrible thing to the graph in Photoshop, but it's not very useful afterwards: Question: how to a change the x-axis minimum and maximum of a Column chart in Excel (2007)?

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• How to make Mac OS X CrashReporter invoke debugger?

  - by StasM

  I have an appache module on Mac OS X that produces random crashes. I can reproduce these crashes with certain sequence of actions, and these crashes produce Crash Reporter dialog "httpd quit unexpectedly". Is there a way to cause Crash Reporter launch debugger (xcode, gdb, anything) instead of just displaying the backtrace? I've tried running httpd under gdb with httpd -X but the crash doesn't happen then - it happens only if many httpd's are running at once, and I found no way to attach gdb to all of them at once. So I was hoping maybe I can cause CrashReporter to attach the debugger when specific process crashes - is there a way to do it?

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• Get an yerror plot without a line in Octave

  - by queueoverflow

  I'd like to print a plot with y-error-bars and just plain points. My current Octave script looks like this: errorbar(x_list, y_list, Delta_y_list, "~.x"); title("physikalisches Pendel"); xlabel("a^2 [m^2]"); ylabel("aT^2 [ms^2]"); print -dpdf plot.pdf The plot I get has a line, although I specified the .x style option: How can I get rid of that line? And the ylabel is in the scale as well, is there some way to fix that?

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• Sorting by key > 10 integer sequences. with thrust

  - by smilingbuddha

  I want to perform a sort_by_key where I have a single key-sequence and multiple value sequences. One usually performs this with sort_by_key( key, key + N, make_zip_iterator( make_tuple(x1 , x2 , ...) ) ) However I want to perform a sort with 10 sequences each of length N. Thrust does not support tuples of size = 10. So is there a way around this ? Of course one can keep a separate copy of the key vector and perform sorts on bunches of 10 sequences. But I would like to do everything in a single call.

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• Redirect rss feed users

  - by Jeremy Love

  I made a redirect but when I subscribe to it, it doesnt get the feed from my new url it gets the one from my old url heres what I have. <IfModule mod_rewrite.c> RewriteEngine On RewriteBase / RewriteRule ^index\.php$ - [L] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /index.php [L] RewriteCond %(REQUEST_URI) ^/articles$ [NC] RewriteRule ^(.*)$ htp://newsite.mysite.com/articles [R=301,L] RewriteCond %(REQUEST_URI) /(.) RewriteRule ^(.*)$ htp://newsite.mysite.com [R=302] RewriteCond %{HTTP_HOST} ^www\.oldsite.mysite\.com$ RewriteRule ^(.*)$ http://newsite.mysite.com [R=301,L] Redirect 301 / http://newsite.mysite.com/ </IfModule> any help is greatly appreciated, also do to me having no points i had to rename 2 of the urls to htp instead of http

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• Nagios dropping ICMP packets

  - by Ankh2054

  I am running a Nagios server on vmware 4.0 and every now and again during the day it alerts that some of servers cannot be reached via ICMP, clearly staging that a certain percentage of packets send are lost. This does not happen to all servers. I know the servers are actually up, because I have done a parallel test from another windows box, just using simple ping and no packets were lost. I also now from the way we monitor out switch that no packets were lost on those particular ports. Could anyone suggest a way to troubelshoot this further ? AT present this points to the nagios server itself loosing packets. thanks

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