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• IIS7 + ASP.NET MVC Client Caching Headers Not Working

  - by Tobin Harris

  Hey folks I've deployed an ASP.NET MVC app on IIS7 and Windows Server 2008. I've read posts on here, and around the web, but can't get the darn client-side caching to work. I'm trying to cache everything in the /Content folder. So far I've select that folder in IIS manager, and set the appropriate HTTP Response Headers (under Common Headers). I've also checked the web.config file in the /Content folder and the values there are being set. All resources in /Content come back with this (from FireBug): Cache-Control no-cache, no-store, must-revalidate Pragma no-cache Content-Type image/png Expires -1 Last-Modified Sun, 11 Oct 2009 19:01:40 GMT Accept-Ranges bytes Etag "f318d643a54aca1:0" Server Microsoft-IIS/7.0 X-Powered-By ASP.NET Date Sun, 11 Oct 2009 20:40:01 GMT Content-Length 620 Note the Cache-Control and Expires values for this static image being requested. The site is currently compiled in Debug (this will change), but surely that wouldn't make a difference? Obviously I'm overlooking something, any ideas would be appreciated. Thanks

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• Sphinx non-fulltext, integer only search

  - by James

  Hello guys, I've got a few tables that literally only hold integers, no "words" and for some reason Sphinx is unable to hold this data in it's library. Just returns "0 bytes" errors for these indexes. Is it possible to do this? If so, how? Below is an example from my Sphinx.conf for one that fails. source track { type = mysql sql_host = host sql_user = user sql_pass = pass sql_db = db sql_port = port sql_query = SELECT id, user, time FROM track; sql_attr_uint = user sql_attr_uint = time sql_query_info = SELECT * FROM track WHERE id=$id } index track { source = track path = /var/lib/sphinx/track docinfo = extern charset_type = utf-8 min_prefix_len = 1 enable_star = 1 }

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• Will MyISAM type tables work better than InnoDB for large numbers of columns?

  - by Ethan

  I have a MySQL InnoDB table with 238 columns. 56 of them are TEXT type, 27 are VARCHAR(255). I am getting MySQL error 139 when users insert data sometimes. After research I found that I'm probably running into InnoDB row size/column size/column count limitations. (I'm putting it that way because the specific limits among those three things are interdependent.) Docs on InnoDB give an idea of the limits. If I switch this table to MyISAM is it likely to solve the problem? I understand the maximum row size of 65,535 bytes. I think I'm hitting InnoDB's additional 8000 byte limit somehow. Switching to PostgreSQL is also a remote option, but would take much longer.

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• Java IO (javase 6)- Help me understand the effects of my sample use of Streams and Writers...

  - by Daddy Warbox

  BufferedWriter out = new BufferedWriter( new OutputStreamWriter( new BufferedOutputStream( new FileOutputStream("out.txt") ) ) ); So let me see if I understand this: A byte output stream is opened for file "out.txt". It is then fed to a buffered output stream to make file operations faster. The buffered stream is fed to an output stream writer to bridge from bytes to characters. Finally, this writer is fed to a buffered writer... which adds another layer of buffering? Hmm...

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• read first 1kb of a blob from oracle

  - by Angus

  Hi, I wish to extract just the first 1024 bytes of a stored blob and not the whole file. The reason for this is I want to just extract the metadata from a file as quickly as possible without having to select the whole blob. I understand the following: select dbms_lob.substr(file_blob, 16,1) from file_upload where file_upload_id=504; which returns it as hex. How may I do this so it returns it in binary data without selecting the whole blob? Thanks in advance.

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• HttpResponse.Filter how determine End of stream

  - by Erik

  I got a HttpResponse.Filter filter that replaces text in the HTML. I've created a class that derives from Stream and implemented the Write method: public override void Write(byte[] buffer, int offset, int count) I read all bytes from buffer and store them in a private StringBuilder, then I replace the text, and write the string back to the Stream. But how can I determine when the stream is at the end of the stream. I.e. how do I determine when to write back the html (string) to the stream?

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• how to read the txt file from the database(line by line)

  - by Ranjana

  i have stored the txt file to sql server database . i need to read the txt file line by line to get the content in it. my code : DataTable dtDeleteFolderFile = new DataTable(); dtDeleteFolderFile = objutility.GetData("GetTxtFileonFileName", new object[] { ddlSelectFile.SelectedItem.Text }).Tables[0]; foreach (DataRow dr in dtDeleteFolderFile.Rows) { name = dr["FileName"].ToString(); records = Convert.ToInt32(dr["NoOfRecords"].ToString()); bytes = (Byte[])dr["Data"]; } FileStream readfile = new FileStream(Server.MapPath("txtfiles/" + name), FileMode.Open); StreamReader streamreader = new StreamReader(readfile); string line = ""; line = streamreader.ReadLine(); but here i have used the FileStream to read from the Particular path. but i have saved the txt file in byt format into my Database. how to read the txt file using the byte[] value to get the txt file content, instead of using the Path value.

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• Storing uploaded content on a website

  - by Matt

  For the past 5 years, my typical solution for storing uploaded files (images, videos, documents, etc) was to throw everything into an "upload" folder and give it a unique name. I'm looking to refine my methods for storing uploaded content and I'm just wondering what other methods are used / preferred. I've considered storing each item in their own folder (folder name is the Id in the db) so I can preserve the uploaded file name. I've also considered uploading all media to a locked folder, then using a file handler, which you pass the Id of the file you want to download in the querystring, it would then read the file and send the bytes to the user. This is handy for checking access, and restricting bandwidth for users.

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• Available message types in JMS?

  - by Caylem

  This is based on a past exam question. The question is asking to describe the four types of message available using JMS. The problem is it says the four, not just four. So it assumes their is only four, no more no less. However according to this site their seems to be five; streams maps text objects bytes *Another book states that XML is another potential type in future versions of JMS. Is XML already available? Am I missing something or is the question just wrong? Thanks.

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• Can we represent bit fields in JSON/BSON?

  - by zubair

  We have a dozen simulators talking to each other on UDP. The interface definition is managed in a database. The simulators are written using different languages; mostly C++, some in Java and C#. Currently, when systems engineer makes changes in the interface definition database, simulator developers manually update the communication data structures in their code. The data is mostly 2-5 bytes with bit fields for each signal. What I want to do is to generate one file from interface definition database describing byte and bit field definitions and let each developer add it to his simulator code with minimal fuss. I looked at JSON/BSON but couldn't find a way to represent bit fields in it. Thanks Zubair

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• Amazon java.lang.VerifyError Android

  - by easycheese

  I have been trying to submit 2 separate apps into the Amazon App store but they keep being rejected. Here is the stack trace for the first: 11-05 11:14:36.488 E/AndroidRuntime(28128): FATAL EXCEPTION: AsyncTask #1 11-05 11:14:36.488 E/AndroidRuntime(28128): java.lang.RuntimeException: An error occured while executing doInBackground() 11-05 11:14:36.488 E/AndroidRuntime(28128): at android.os.AsyncTask$3.done(AsyncTask.java:200) 11-05 11:14:36.488 E/AndroidRuntime(28128): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273) 11-05 11:14:36.488 E/AndroidRuntime(28128): at java.util.concurrent.FutureTask.setException(FutureTask.java:124) 11-05 11:14:36.488 E/AndroidRuntime(28128): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307) 11-05 11:14:36.488 E/AndroidRuntime(28128): at java.util.concurrent.FutureTask.run(FutureTask.java:137) 11-05 11:14:36.488 E/AndroidRuntime(28128): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068) 11-05 11:14:36.488 E/AndroidRuntime(28128): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561) 11-05 11:14:36.488 E/AndroidRuntime(28128): at java.lang.Thread.run(Thread.java:1096) 11-05 11:14:36.488 E/AndroidRuntime(28128): Caused by: java.lang.VerifyError: com.companionfree.WLThemeViewer.AmazonClientManager 11-05 11:14:36.488 E/AndroidRuntime(28128): at com.companionfree.WLThemeViewer.UpdateDBs.doInBackground(UpdateDBs.java) 11-05 11:14:36.488 E/AndroidRuntime(28128): at com.companionfree.WLThemeViewer.UpdateDBs.doInBackground(UpdateDBs.java) 11-05 11:14:36.488 E/AndroidRuntime(28128): at android.os.AsyncTask$2.call(AsyncTask.java:185) 11-05 11:14:36.488 E/AndroidRuntime(28128): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305) 11-05 11:14:36.488 E/AndroidRuntime(28128): ... 4 more And the relevant logcat for the second 10-12 15:41:48.929 D/dalvikvm( 2451): GC_FOR_MALLOC freed 8099 objects / 524416 bytes in 34ms 10-12 15:41:49.327 I/RPC ( 1563): rx thread timeout (1 clients): 10-12 15:41:49.828 I/RPC ( 1563): rx thread timeout (1 clients): 10-12 15:41:50.089 I/ActivityManager( 1563): Starting activity: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10200000 cmp=com.companionfree.pushup/.MainScreen } 10-12 15:41:50.099 D/SurfaceFlinger( 1563): Layer::setBuffers(this=0xeafa50), pid=1563, w=1, h=1 10-12 15:41:50.099 D/SurfaceFlinger( 1563): Layer::setBuffers(this=0xeafa50), pid=1563, w=1, h=1 10-12 15:41:50.139 D/SurfaceFlinger( 1563): Layer::requestBuffer(this=0xeafa50), index=0, pid=1563, w=480, h=800 success 10-12 15:41:50.189 I/ActivityManager( 1563): Start proc com.companionfree.pushup for activity com.companionfree.pushup/.MainScreen: pid=2644 uid=10129 gids={1015, 3003} 10-12 15:41:50.319 I/RPC ( 1563): rx thread timeout (1 clients): 10-12 15:41:50.359 W/dalvikvm( 2644): VFY: Lcom/companionfree/pushup/WorkoutDbAdapter; is not instance of Landroid/app/Activity; 10-12 15:41:50.369 W/dalvikvm( 2644): VFY: bad arg 0 (into Landroid/app/Activity;) 10-12 15:41:50.369 W/dalvikvm( 2644): VFY: rejecting call to Lcom/amazon/android/Kiwi;.onActivityResult (Landroid/app/Activity;IILandroid/content/Intent;)Z 10-12 15:41:50.369 W/dalvikvm( 2644): VFY: rejecting opcode 0x71 at 0x0000 10-12 15:41:50.369 W/dalvikvm( 2644): VFY: rejected Lcom/companionfree/pushup/WorkoutDbAdapter;.onActivityResult (IILandroid/content/Intent;)V 10-12 15:41:50.369 W/dalvikvm( 2644): Verifier rejected class Lcom/companionfree/pushup/WorkoutDbAdapter; 10-12 15:41:50.369 D/AndroidRuntime( 2644): Shutting down VM 10-12 15:41:50.369 W/dalvikvm( 2644): threadid=1: thread exiting with uncaught exception (group=0x40025a70) 10-12 15:41:50.369 E/AndroidRuntime( 2644): FATAL EXCEPTION: main 10-12 15:41:50.369 E/AndroidRuntime( 2644): java.lang.VerifyError: com.companionfree.pushup.WorkoutDbAdapter 10-12 15:41:50.369 E/AndroidRuntime( 2644): at com.companionfree.pushup.MainScreen.onCreateMainScreen(MainScreen.java) 10-12 15:41:50.369 E/AndroidRuntime( 2644): at com.companionfree.pushup.MainScreen.onCreate(MainScreen.java) 10-12 15:41:50.369 E/AndroidRuntime( 2644): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1088) 10-12 15:41:50.369 E/AndroidRuntime( 2644): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2802) 10-12 15:41:50.369 E/AndroidRuntime( 2644): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2859) 10-12 15:41:50.369 E/AndroidRuntime( 2644): at android.app.ActivityThread.access$2300(ActivityThread.java:136) 10-12 15:41:50.369 E/AndroidRuntime( 2644): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2179) 10-12 15:41:50.369 E/AndroidRuntime( 2644): at android.os.Handler.dispatchMessage(Handler.java:99) 10-12 15:41:50.369 E/AndroidRuntime( 2644): at android.os.Looper.loop(Looper.java:143) 10-12 15:41:50.369 E/AndroidRuntime( 2644): at android.app.ActivityThread.main(ActivityThread.java:5073) 10-12 15:41:50.369 E/AndroidRuntime( 2644): at java.lang.reflect.Method.invokeNative(Native Method) 10-12 15:41:50.369 E/AndroidRuntime( 2644): at java.lang.reflect.Method.invoke(Method.java:521) 10-12 15:41:50.369 E/AndroidRuntime( 2644): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858) 10-12 15:41:50.369 E/AndroidRuntime( 2644): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 10-12 15:41:50.369 E/AndroidRuntime( 2644): at dalvik.system.NativeStart.main(Native Method) 10-12 15:41:50.379 W/ActivityManager( 1563): Force finishing activity com.companionfree.pushup/.MainScreen 10-12 15:41:50.399 D/SurfaceFlinger( 1563): Layer::setBuffers(this=0xeff6b8), pid=1563, w=1, h=1 10-12 15:41:50.399 D/SurfaceFlinger( 1563): Layer::setBuffers(this=0xeff6b8), pid=1563, w=1, h=1 10-12 15:41:50.419 D/SurfaceFlinger( 1563): Layer::requestBuffer(this=0xeff6b8), index=0, pid=1563, w=480, h=337 success 10-12 15:41:50.469 D/dalvikvm( 2451): GC_FOR_MALLOC freed 7889 objects / 521072 bytes in 105ms 10-12 15:41:50.819 I/RPC ( 1563): rx thread timeout (1 clients): I see the same verify error on both but I can't figure it out. The only common library used between the 2 apps is the FlurryAgent.jar for analytics. For the top app I have For the bottom app I have in the manifests. The only information I have been able to find out is about libraries (GSON) and needing to use dx but I am using Eclipse so that doesn't help. To make this more difficult, the error does NOT occur on the Android Market. Yet the testers at Amazon say that it FC 5/5 times on each of their devices (I tried using an emulator for their test devices and they worked fine). I know they use "wrapper" code around my app and I think it must be interfering in some way. Does anyone have any experience with this?

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• How to open a large text file in C#

  - by desmati

  I have a text file that contains about 100000 articles. The structure of file is: BEGIN OF FILE .Document ID 42944-YEAR:5 .Date 03\08\11 .Cat political Article Content 1 .Document ID 42945-YEAR:5 .Date 03\08\11 .Cat political Article Content 2 END OF FILE I want to open this file in c# for processing it line by line. I tried this code: String[] FileLines = File.ReadAllText(TB_SourceFile.Text).Split(Environment.NewLine.ToCharArray()); But it says: Exception of type 'System.OutOfMemoryException' was thrown. The question is How can I open this file and read it line by line. File Size: 564 MB (591,886,626 bytes) File Encoding: UTF-8 File contains Unicode characters.

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• What database works well with 200+GB of data?

  - by taw

  I've been using mysql (with innodb; on Amazon rds) because it's sort of universal default, but it's been ridiculously under-performing, and tweaking it only delays the inevitable. The data is mostly relatively short (<1kB of bytes each) blobs information about 100Ms of urls. There is (or should be, mysql cannot seem to handle it) very high amount of insert / update / retrieve but few complex queries - not that complex queries wouldn't be useful, but because mysql is so slow that it's far faster to get the data out, process it locally, and cache the results somewhere. I can keep tweaking mysql and throwing more hardware at it, but it seems increasingly futile. So what are the options? SQL/relational model/etc. optional - anything will do as long as it's fast, networked, and language-independent.

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• What does LAME text does in MP3 file?

  - by Dims

  I see here http://en.wikipedia.org/wiki/MP3 that MP3 file consists of MP3 headers interchanged with MP3 data. MP3 header consist of few bytes. But here is my MP3 file dump with ID3 tag cut. Header is highlighted with blue. You can see that "LAME3.96" text is highlighted with green. What does it does there? Is this a part of MP3 elementary stream? Or this is the part of some headers I didn't tag?

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• What does 'unsigned temp:3' means

  - by Munir Ahmed

  Hi, I'm trying to map a C structure to Java using JNA. I came across something that I've never seen. The struct definition is as follow, struct op { unsigned op_type:9; //---> what does this means? unsigned op_opt:1; unsigned op_latefree:1; unsigned op_latefreed:1; unsigned op_attached:1; unsigned op_spare:3; U8 op_flags; U8 op_private; }; you can see some variable being defined like unsigned op_attached:1 and I'm unsure what would that mean: would that effect number of bytes to be allocated for this particular variable? any help? Thanks, Munir

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• How do I handle partial write completions from overlapped I/O using I/O Completion Ports

  - by Poni

  On Windows I/O completion ports, say I do this: void function() { WSASend("1111"); // A WSASend("2222"); // B WSASend("3333"); // C } If I got a "write-complete" that says 3 bytes of WSASend() A were sent, is it possible that right after that I'll get a "write-complete" that tells me that some or all of B & C were sent, or will TCP will hold them until I re-issue a WSASend() call with the rest of A's data? Or will TCP complete it automatically?

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• Optimal password salt length

  - by Juliusz Gonera

  I tried to find the answer to this question on Stack Overflow without any success. Let's say I store passwords using SHA-1 hash (so it's 160 bits) and let's assume that SHA-1 is enough for my application. How long should be the salt used to generated password's hash? The only answer I found was that there's no point in making it longer than the hash itself (160 bits in this case) which sounds logical, but should I make it that long? E.g. Ubuntu uses 8-byte salt with SHA-512 (I guess), so would 8 bytes be enough for SHA-1 too or maybe it would be too much?

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• Unit testing UDP socket handling code

  - by JustJeff

  Are there any 'good' ways to cause a thread waiting on a recvfrom() call to become unblocked and return with an error? The motivation for this is to write unit tests for a system which includes a unit that reads UDP datagrams. One of the branches handles errors on the recvfrom call itself. The code isn't required to distinguish between different types of errors, it just has to set a flag. I've thought of closing the socket from another thread, or do a shutdown on it, to cause recvfrom to return with an error, but this seems a bit heavy handed. I've seen mention elsewhere that sending an over-sized packet would do it, and so set up an experiment where a 16K buffer was sent to a recvfrom waiting for just 4K, but that didn't result in an error. The recvfrom just return 4096, to indicate it had gotten that many bytes.

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• Resizing Images with ASP.NET and saving to Database

  - by Ryan

  I need to take an uploaded image, resize it, and save it to the database. Simple enough, except I don't have access to save any temp files to the server. I'm taking the image, resizing it as a Bitmap, and need to save it to a database field as the original image type (JPG for example). How can I get the FileBytes() like this, so I can save it to the database? Before I was using ImageUpload.FileBytes() but now that I'm resizing I'm dealing with Images and Bitmaps instead of FileUploads and can't seem find anything that will give me the bytes. Thanks!

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• pgp key information

  - by calccrypto

  can someone show a description of the information of what a pgp looks like if only the descriptions were there but not the actual information? something like (i dont remember if the values are correct): packet-type[4 bits], total length in bytes[16 bits], packet version type [4 bits], creation-time[32 bits], encryption-algorithm[8 bits], ...,etc,etc ive tried to understand rfc4880, but its tedious and confusing. so far, i am think i have extracted the 4 i wrote above, but i cant seem to get the rest of the information out. can anyone help? i know i can just find some pgp program, but the whole point of this is to allow me to learn how those programs work in the first place

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• Problem with Ruby script output being stored into a file

  - by nickf

  I have a Ruby script that outputs a heap of text. As an example: puts "line 1" puts "line 2" puts "line 3" # etc... (obviously, this isn't how my script works..) There's not a lot of data - perhaps about 8kb of character data in total. When I run the script on the command line, it works as expected: $ ./my-script.rb line 1 line 2 line 3 But, when I push it into a file, the output is truncated at exactly 4096 bytes: $ ./my-script.rb > output.txt What would cause it to stop at 4kb?

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• Class members allocation on heap/stack? C++

  - by simplebutperfect

  If a class is declared as follows: class MyClass { char * MyMember; MyClass() { MyMember = new char[250]; } ~MyClass() { delete[] MyMember; } }; And it could be done like this: class MyClass { char MyMember[250]; }; How does a class gets allocated on heap, like if i do MyClass * Mine = new MyClass(); Does the allocated memory also allocates the 250 bytes in the second example along with the class instantiation? And will the member be valid for the whole lifetime of MyClass object? As for the first example, is it practical to allocate class members on heap?

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• Reading files using Windows API

  - by Eli Polonsky

  Hi I'm trying to write a console program that reads characters from a file. i want it to be able to read from a Unicode file as well as an ANSI one. how should i address this issue? do i need to programatically distinguish the type of file and read acoordingly? or can i somehow use the windows API data types like TCHAR and stuff like that. The only differnce between reading from the files is that in Unicode i have to read 2 bytes for a character and in ASNSI its 1 byte? im a little lost with this windows API. would appretiate any help thanks

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• Perl LWP::UserAgent mishandling UTF-8 response

  - by RedGrittyBrick

  When I use LWP::UserAgent to retrieve content encoded in UTF-8 it seems LWP::UserAgent doesn't handle the encoding correctly. Here's the output after setting the Command Prompt window to Unicode by the command chcp 65001 Note that this initially gives the appearance that all is well, but I think it's just the shell reassembling bytes and decoding UTF-8, From the other output you can see that perl itself is not handling wide characters correctly. C:\perl getutf8.pl ====================================================================== HTTP/1.1 200 OK Connection: close Date: Fri, 31 Dec 2010 19:24:04 GMT Accept-Ranges: bytes Server: Apache/2.2.8 (Win32) PHP/5.2.6 Content-Length: 75 Content-Type: application/xml; charset=utf-8 Last-Modified: Fri, 31 Dec 2010 19:20:18 GMT Client-Date: Fri, 31 Dec 2010 19:24:04 GMT Client-Peer: 127.0.0.1:80 Client-Response-Num: 1 <?xml version="1.0" encoding="UTF-8"? <nameBudejovický Budvar</name ====================================================================== response content length is 33 ....v....1....v....2....v....3....v....4 <nameBudejovický Budvar</name . . . . v . . . . 1 . . . . v . . . . 2 . . . . v . . . . 3 . . . . 3c6e616d653e427564c49b6a6f7669636bc3bd204275647661723c2f6e616d653e < n a m e B u d ? ? j o v i c k ? ? B u d v a r < / n a m e Above you can see the payload length is 31 characters but Perl thinks it is 33. For confirmation, in the hex, we can see that the UTF-8 sequences c49b and c3bd are being interpreted as four separate characters and not as two Unicode characters. Here's the code #!perl use strict; use warnings; use LWP::UserAgent; my $ua = LWP::UserAgent-new(); my $response = $ua-get('http://localhost/Bud.xml'); if (! $response-is_success) { die $response-status_line; } print '='x70,"\n",$response-as_string(), '='x70,"\n"; my $r = $response-decoded_content((charset = 'UTF-8')); $/ = "\x0d\x0a"; # seems to be \x0a otherwise! chomp($r); # Remove any xml prologue $r =~ s/^<\?.*\?\x0d\x0a//; print "Response content length is ", length($r), "\n\n"; print "....v....1....v....2....v....3....v....4\n"; print $r,"\n"; print ". . . . v . . . . 1 . . . . v . . . . 2 . . . . v . . . . 3 . . . . \n"; print unpack("H*", $r), "\n"; print join(" ", split("", $r)), "\n"; Note that Bud.xml is UTF-8 encoded without a BOM. How can I persuade LWP::UserAgent to do the right thing? P.S. Ultimately I want to translate the Unicode data into an ASCII encoding, even if it means replacing each non-ASCII character with one question mark or other marker. I have accepted Ysth's "upgrade" answer - because I know it is the right thing to do when possible. However I am going to use a work-around (which may depress Tom further): $r = encode("cp437", decode("utf8", $r));

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• Using objects with STL vector - minimal set of methods

  - by osgx

  Hello What is "minimal framework" (necessary methods) of object, which I will use with STL <vector>? For my assumptions: #include <vector> #include <cstring> using namespace std; class Doit { private: char *a; public: Doit(){a=(char*)malloc(10);} ~Doit(){free(a);} }; int main(){ vector<Doit> v(10); } gives *** glibc detected *** ./a.out: double free or corruption (fasttop): 0x0804b008 *** Aborted and in valgrind: malloc/free: 2 allocs, 12 frees, 50 bytes allocated.

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