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• Accessing Erlang business layer via REST

  - by Polyn

  For a college project i'm thinking of implementing the business layer in Erlang and then accessing it via multiple front-ends using REST. I would like to avail of OTP features like distributed applications, etc. My question is how do I expose gen_server calls/casts to other applications? Obviously I could make RPC calls via language specific "bridges" like OTP.net or JInterface, but I want a consistent way to access it like REST.

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• Programmatically find the number of cores on a machine

  - by hazzen

  This is more of a curiosity question than something that needs actual solving, but is there a way to determine how many cores a machine has from C++ in a platform-independent way? If no such thing exists, what about determining it per-platform (Windows/*nix/Mac)?

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• How host name is broadcasted in a subnet

  - by apalopohapa

  Hello. I'm working with Microchip's TCP/IP stack and the host name of my device is not being broadcasted, although I can access it using its DHCP assigned IP. So the question is, what is the protocol that a network device uses to broadcast its host name, so that when I see a list of devices in a network I can identify it by name? Is it the NetBIOS name service or something else? Thanks in advance.

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• What's the deal with reftype { } ?

  - by friedo

  I recently saw some code that reminded me to ask this question. Lately, I've been seeing a lot of this: use Scalar::Util 'reftype'; if ( reftype $some_ref eq reftype { } ) { ... } What is the purpose of calling reftype on an anonymous hashref? Why not just say eq 'HASH' ?

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• Python inter-computer communication.

  - by matt1024

  This whole topic is way out of my depth, so forgive my imprecise question, but I have two computers both connected to one LAN. What I want is to be able to communicate one string between the two, by running a python script on the first (the host) where the string will originate, and a second on the client computer to retrieve the string. What is the most efficient way for an inexperienced programmer like me to achieve this?

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• Insert or update when product is present using mysql

  - by Aryan

  main_product table productid outward shopid 333 2 44//present 343 4 44//present 353 5 44//present 363 1 44//present 373 2 44//not present min_product table productid outward shopid 333 1 44 343 1 44 353 1 44 363 1 44 SELECT DISTINCT (A.productid),A.outward, B.productid,B.outward FROM main_product A INNER JOIN min_product B on B.productid=A.product_id where A.shopid='44' and B.shopid='44' my question how can i INSERT OR UPDATE in one query using mysql by checking if it is present or not if present update else insert something like this? INSERT INTO mytable (key, value) VALUES ($newkey, $newvalue) ON DUPLICATE KEY UPDATE SET value = $newvalue

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• Switching Ruby on Rails databases

  - by Marco

  Hi, I'm starting learning Ruby on Rails. So my application, like every Rails app, has three databases: Development Test Production And the question is: how do i switch from a db to another? Thanks

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• How could i avoid the SAVE dialog in my custom blackberry Application?

  - by SIA

  Hi Everybody, I am writing a blackberry application and pushing screens one after another(three in series) Screen1 displays Screen2 and Screen2 displays Screen3 When i press "Back Key" on my Blackberry Device i.e., bold 9700, its prompts a dialog box with Question mark image and buttons "Save" "Discard" "Cancel". Why does this dialog appears? How can i avoid this dialog? Please Help Thanks SIA

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• iOS: how to understand the role of rootviewcontroller and its relationship with other objects

  - by Anthony Kong

  I have created a UISplitViewController based iOS app in XCode 3.2.5 Below is a screen shot of Interface builder showing the rootviewcontroller and how it is linked to other objects. Being a beginner myself, I do not understand: 1) What is the role of the rootviewcontroller? Searched the documentation but what I found did not answer this question. 2) I thought a IBOutlet should only link to one corresponding object. Why in this case the rootviewcontroller is linked to two?

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• How to find the nearest integer to a specified integer from a table of integers?

  - by corrilaz

  How to find the nearest integer upon the provided one? Say, I have the following integers in the mysql database: 405, 600, 304. The question is how to I select 600 upon providing 550 or select 304 upon providing 300 (ie, so as to find the nearest integer)? i am talking about INTEGERS, not floats.

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• Controlling youtube traffic path ingoing to multihoming network

  - by Hamdy Ali

  Scenario: I've network multihoming (dual ISP) setup. each ISP bandwidth 500Mbps Currently ISP-A link bandwidth almost fully utilized then the second ISP-B link From our investigation, it is because youtube server cache response to link ISP-A. Some time the utilization of link ISP B increased because at that time youtube server cached is response to ISP B. My question how/Why did this happen? how do I force youtube cache server using ISP link B?

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• C#: How to replace "-" with " -" only when it's not preceded by "e"?

  - by MaDDoX

  I imagine I should use Regex for that but I still scratch my head a lot about it (and the only similar question I found wasn't exactly my case) so I decided to ask for help. This is the input and expected output: Input: "c-0.68219,-0.0478 -1.01455-0.0441 0.2321e-4,0.43212" Output:"c -0.68219,-0.0478 -1.01455 -0.0441 0.2321e-4,0.43212" Basically I need either commas or spaces as value separators, but I can't break the exponential index (e-4). Maybe do two successive replacements?

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• How to create custom media type in WordPress?

  - by OJ2

  I have some custom media (special map points for example) I want to associate custom data player with it and place its instances in media library (so them to be accessible in media gallery), keeping possibility to edit it any time user wants to. how to do it? Sorry for my Eng.Lang feel free to edit this Question.

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• Using PreferenceScreen/PreferenceActivity to configure home screen widgets

  - by hpe

  Hi, I'm creating an appwidget, where the user should be able to configure it before it is added to the home screen. To me, PreferenceScreen/PreferenceActivity seems perfect for the task, but the intention behind these classes seem to be configuring an actual application. I've searched, but cannot find any documentation or tutorials which covers this question. Is it possible to configure a widget using these classes, or is the only alternative to configure it through an ordinary view? Thanks for any answers!

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• Stopping/Starting a remote Windows service and waiting for it to open/close

  - by ripper234

  The top answer to this question tells me how to stop/start a remote service. Great. Now, all I need is to wait for the actual stop/start to complete. So, what I'm looking for is a dos command to: Start a service, should return only after the service is started (or after a timeout, raising error level) Stop a service, return only after the service is stopped

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• Sharepoint 2007 - Content query webpart formmode

  - by Roland

  I have got a simple question, but the answer is hard to find. I want to put a contentquery webpart with a custom xslt on my page, but it has to render extra links if the page is opened in edit-mode. So, if (SPContext.Current.FormContext.FormMode == SPControlMode.Display) : show some extra links near the items in the xslt. How can I achieve this? I have already overridden the default ContentByQueryWebPart, is that the way? Thanks in advance.

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• how to do new lines? [ textarea -> jquery -> p tag ]

  - by Haroldo

  I'm doing something very similar to the stackoverflow question preview only much more basic. user types in text area - keyup shows what they've typed in preview new lines aren't working $('input, textarea').keyup(function(){ var value = $this.attr('value').replace('\n', '<br />').replace('\r', '<br />'); $('p.preview').html(value); })

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• Manipulating row data with Javascript

  - by fivetwentysix

  I have a specific question, I have a link in a table in the third column of each row, when the user clicks that link he loads some ajax and updates the page, what I want to also happen is that in the 2nd column of the row where the link is, change the td's class from false to true, and the value from No to Yes. Thanks!

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• How to show Iplmage format on the GUI of C++ instead of showing it in another windows?

  - by Darren

  I'm trying to display the output image onto the C++ interface instead of creating another window to display the image. For example: cvNameWindow("Window A",0); cvShowImage("Window A", imgA); This will create an window and display the imgA on it. My question is that can i display my imgA onto my C++ interface together with all my other button and textbox. I'm using Borland C++ Builder 6 and OpenCV.

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• What were the most significant events in Computer Science?

  - by Brabster

  What were the most significant events or milestones in the history of computer science? I haven't been able to find a potted history, so I thought I'd see what views the SO community had on the question.

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• what should be the return type of the hashCode()

  - by subhashis

  The signature of the hashCode() method is public int hashCode(){ return x; } in this case x must be an int(primitive) but plz can anyone explain it to me that the number which the hashCode() returns must be a prime number, even number...etc or there is no specification ? the reason behind i am asking this question is i have seen it in different ids the auto generated code always returns a prime number, so i need to know why? thanks in advance

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• Why is my visual studio 2008 project read-only

  - by Richard

  I'm working on a project for school, we use visual studio 2008 there and I use it at home, both are express edition. The project in question I started at school, but I cannot edit it at home, when I open the .sln I get this "The IntelliSense information will not be available for .VC++ projects because the Intellisense database file Location/Junk.ncb could not be opened for writing. Other features will also be affected if the solution directory is read-only." How do I open my project so that I can edit it?

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• Unity view Registered Types during debug

  - by Jon Archway

  Possibly a stupid question, but during debug I simply want to see the types that have been registered with my Unity container. I have tried going through the container in the watch window, but can't seem to find what I am looking for? I am expecting there to be a list of registered types somewhere? Thanks in advance

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• Audio Streaming API's: Wifi vs what?

  - by Moshe

  I've noticed certain radio apps, that some stations required wifi and others did not. What were those other stations possibly using? Are there other methods of streaming audio on iOS? Apparently, I was not clear in my question before. I'm asking in terms of API's. Is there an API to interact directly with say, FM radio, on iOS? Is wifi the only way of streaming audio?

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• OpenEntityManagerInViewFilter and testing the presence of an EntityManager

  - by James P.

  I posted a question a few days ago mentionning Spring's OpenEntityManagerInViewFilter: http://stackoverflow.com/questions/2385858/uirepeat-inside-a-uirepeat-and-lazyinitexception An obvious thing that should have been asked and now comes to mind is how to test for the presence of an EntityManager in a JSF project. What is a good way of doing this?

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