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• How can I check the MIME type of an uploaded file using Perl CGI?

  - by FOOM

  I'm trying to get the MIME type of an <input type="file" /> element using Perl, but without actually examining the contents of the file itself, In other words, just using the HTTP headers. I have only been able to get the "multipart/form-type" Content-Type value, but my understanding is that each element will get its own MIME Type? How can I see the sub-MIME types using Perl?

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• How can i resolve the N+1 Selects problem ?

  - by Maxime ARNSTAMM

  Hello everyone, I have trouble understanding how to avoid the n+1 select in jpa or hibernate. From what i read, there's the 'left join fetch', but i'm not sure if it still works with more than one list (oneToMany).. Could someone explain it to me, or give me a link with a clear complete explanation please ? I'm sorry if this is a noob question, but i can't find a real clear article or doc on this issue. Thanks

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• Why should I be using testing frameworks in PHP?

  - by Industrial

  Hi everyone, I have recently heard a lot of people argue about using PHP testing features like PHPunit and SimpleTest together with their IDE of choice (Eclipse for me). After googling the subject, I have still a hard time understanding the pros and cons of using these testing frameworks to speed up development. If anyone could explain this for me in a more basic level, I would really appreciate it. I am using PHP5 for the notice. Thanks a lot!

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• What is the purpose of Finalization in java?

  - by Karthik

  Different websites are giving different opinions. My understanding is this: To clean up or reclaim the memory that an object occupies, the Garbage collector comes into action. (automatically is invoked???) The garbage collector then dereferences the object. Sometimes, there is no way for the garbage collector to access the object. Then finalize is invoked to do a final clean up processing after which the garbage collector can be invoked. is this right?

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• PHP: How to get creation date from uploaded file?

  - by Haemp

  Problem: I want to determine the original file creation time from a file uploaded to my server via PHP. My understanding is that the file is copied from the client to a temporary file on my server, which then is referenced in the $_FILES var. The temporary file is of course of no use because it was just created. Is there any way I could get the creation date from the clients original file? Thanks

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• iPhone app sales report help...

  - by Moshe

  I am having trouble understanding my iPhone app sales report. Which column says how many downloads I have? Which report should I use? I am asking here because only developers would understand what I am talking about. Nobody else sees these reports.

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• What is the difference between UserController.GetUser(PortalId,UserId, true/false) and UserControlle

  - by Kthurein

  Could anyone possibly share me your understanding on the difference between UserController.GetUser(PortalId,UserId, true/false) and UserController.GetCurrentUserInfo(). Can I use them interchangeably? Thanks.

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• Simple wave generator with SDL in c++

  - by Vlad Popescu

  i am having problems understanding how the audio part of the sdl library works now, i know that when you initialize it, you have to specify the frequency and a callback<< function, which i think is then called automatically at the given frequency. can anyone who worked with the sdl library write a simple example that would use sdl_audio to generate a 440 hz square wave (since it is the simplest waveform) at a sampling frequency of 44000 hz? thanks in advance

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• Slick: why would I save "Unit" to my database?

  - by alapeno

  I'm new to Scala and Slick and was surprised by something in the Slick documentation: The following primitive types are supported out of the box for JDBC-based databases in JdbcProfile ... Unit ... I don't get why this list contains Unit. From my understanding, Unit is similar to Java's void, something I neither can save to nor receive from my database. What is the intention behind it? edit: you can find it here.

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• AdHoc and development distribution of iPhone applications

  - by Dmitry

  I have seen mentions of 2 different distribution models of iPhone apps - Ad Hoc and Development. Is my understanding correct that these two are the same just with different names?

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• Memory Size Allocation on GPU - opengl texture loading question

  - by beyondsleepytime

  I'm loading pixels from an image which is 32 w by 32 height. The format I'm loading them in is ARGB via java. When I bind this to the video card, I can expect that the video card might use somewhere around 32*32*4 bytes, or 4K. Similarly, 1024 w, 1024 h would be 1024*1024*4 = 4MB. Is my understanding correct? Now I understand where all the memory goes!

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• Call RecognizerIntent from service

  - by Tobia Loschiavo

  Hi, I am working on an Android service. I need to call RecognizerIntent from a service in order to use in the service the recognized text. I have no startActivityForResult() method in Service class so I have problem understanding how to achieve this task. Is it possible? Many thanks

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• Inter applet communication.

  - by Jijoy

  Hi , In my understanding each applets are independent entities . Is it possible to have inter applet communication ? . If so , how it could be achieved ? Thanks J

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• jQuery NewBie Questions: What's the deal with $(document).(ready) ?

  - by Rachel

  Hello, I am newbie to jQuery, just trying to learn it since last couple of days. In my office, there are few experience JavaScript Developer and they work mainly with jQuery for all their needs and whenever I got and talk to them to get some better understanding of how jQuery works and first they say is that on $(document).(ready) you do this and on $(document).(ready) you do that. So my main question is What is the $(document).(ready) and how does it really works ? Any inputs would be highly appreciated.

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• ROWID (oracle) - any use for it ?

  - by trojanwarrior3000

  My understanding is that ROWID is a unique value for each row in the result returned by a query. why we need this ROWID ?( there is already ROWNUM is ORACLE). Have any one used ROWID in sql query?

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• Whats does these signs mean in vim?

  - by johnas

  I've a hard time understanding signs I see in my text editor vim. I see signs like ^@ and ^A and ^M and ^F. What does this mean? Is there any structured list of these signs and their meaning? Trying to Google it is a dead end since Google will not search for "^@".

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• What is the best script language for n/w programming + web development

  - by Mohanavel

  Hi, I'm interested in developing web application and networking application. For that what is the best script language to learn. Which one is effective for this two. So for, i don't know even a single syntax of any scripting language. Which is the best script for understanding, maintainable, effective and simple (may not). Please don't say what are all you know. Please tell me the best

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• in relation to web development, what is a taxonomy?

  - by isolatedIterator

  Can people explain what taxonomy means in terms of a web site? My current understanding it a classification of the contents in relationship to each other, but it seems like it must go beyond that simplistic definition. and yes, I have read the wikipedia entry for this.

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• Should I consider memmove() O(n) or O(1) ?

  - by Andrei Ciobanu

  Hello, this may be a silly question, but I want to calculate the complexity of one of my algorithms, and I am not sure what complexity to consider for the memmove() function. Can you please help / explain ? void * memmove ( void * destination, const void * source, size_t num ); So is the complexity O(num) or O(1). I suppose it's O(num), but I am not sure as I lack for now the understanding of what's going on under the hood.

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• Blackberry - possible to find out when a bluetooth speaker is paired with the device?

  - by lostInTransit

  Hi I tried understanding the use of the bluetooth package available in the SDK starting version 4.0. But I couldn't find anything which would suggest the detection of a bluetooth headset/speakerphone within an application. I want to initiate a method in my app when it pairs with a bluetooth headset. Any ideas how or where I can start in the docs? Thanks.

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• What does the following SPF record allow?

  - by Pasta

  v=spf1 ip4:211.121.22.56 a mx a:server.hostname.com ~all My understanding is it allows the following to send out emails: ip4: 211.121.22.56 a: A record (where website is hosted) mx: whatever the MX record says a: this server name And nothing other than the above 4 places Am I correct?

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• I know I can't say myView.frame.origin.x = val - But why ?

  - by Allisone

  I know that I can't use that myView.frame.origin.x = 25.0; that I have to use instead CGRect myFrame = myView.frame; myFrame.origin.x = 25.0; myView.frame = myFrame; And I'm doing it all the time (f.e. in animations), but I don't know why I must do it that way. I would like to fill that gap in my understanding. Can someone explain ?

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• Visual Studio support for coding in CIL/IL/MSIL?

  - by jdk

  For the longest time I've been curious to code in Intermediate Language just as an academic endeavour and to gain a better understanding of what's "happening under the hood". Is there any sort of Visual Studio support for this in the form of: project templates, IntelliSense integration, and those kind of RAD features?

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• Why is Serializable Attribute required for an object to be serialized

  - by Keivan

  Based on my understanding SerializableAttribute provides no compile time checks, as its all done at runtime, then why is it required for classes to be marked as serializable? Couldn't sterilizer just try to serialize an object and just fail? isn't it what it does right-now when something is marked, it tries and fails. wouldn't it be better if you had to mark things as unserializable rather than serializable? that way you wouldn't have the problem of libraries not marking things as serializable?

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• SQL Server merge statement source and target issue

  - by George2

  Hello everyone, I am using SQL Server 2008 Enterprise and using the new Merge statement. From my experiment, I find source is always read only (table content not modified, i.e. no record is deleted/inserted/updated)? Is that correct understanding? thanks in advance, George

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