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Articles indexed Tuesday May 18 2010

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  • What exactly does ssh send when performing key negotiation?

    - by Checkers
    When explicitly specifying identity file to ssh: ssh -i ./id_rsa ... I have these lines in ssh debug trace: debug1: Offering public key: ./id_rsa debug3: send_pubkey_test debug2: we sent a publickey packet, wait for reply Does it mean ssh-generated id_rsa contains public RSA exponent as well, or ssh is sending out my private key? (which, of course, does not make sense). id_rsa format seems to be rather explicit that it contains private key with its "BEGIN PRIVATE KEY" block.

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  • iOrgSoft Video Converter for Mac

    - by terryhao
    [url=http://www.iorgsoft.com/Video-Converter-for-Mac/]video converter for mac[/url] IOrgSoft[url=http://www.iorgsoft.com/Video-Converter-for-Mac/]video converter for mac[/url] is an excellent video converting and editing software for Macintosh users. A built-in powerful video player, trimming, splitter/joiner/merger tools give you everything you need to manage your videos on mac. This mac converter supports many video formats like AVI, MP4, WMV, MPEG-1,2, YouTube(FLV), Limewire, Realplayer(RM,RMVB), Quicktime(MOV), MKV, MOD, TOD, ASF, 3GP, 3G2, AVCHD/M2TS/MTS/TS/TRP/TS, MXF, etc. Video Converter for Mac features a very clean user interface which makes this task a breeze. You can trim/clip any segments and optionally merge/join and sort them to create your personal movie, crop frame size to remove any unwanted area in the frame just like a pair of smart scissors and set the output video parameters such as video resolution, video frame rate, audio codec, video codec and video quality. Converted videos can be imported into imovie/itunes/FCE/FCP/QuickTime Pro or played on iPad, iPod touch, iPod classic, iPod nano, iPhone, iPhone 3GS, Apple TV, PSP, PS3, Creative Zen, iRiver PMP, Archos, mobile phones and other MP4/MP3 players. Video Converter for Mac makes video conversion easy. Free download now and have a try for yourself! [url=http://www.iorgsoft.com/Video-Editor-for-Mac/]Video Editor for Mac[/url] [url=http://www.iorgsoft.com/Mod-Converter/]mod converter[/url] [url=http://www.iorgsoft.com/Mod-Converter-for-Mac/]mod converter for mac[/url]

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  • More elegant way to write this?

    - by tesmar
    Hi, I am trying to make a multi-dimensional array of characters in ruby, and this works, but is there a more elegant way? def initialize(text) @map = Array.new i = 0 text.split("\n").each do |x| @map[i] = x.scan(/./) i += 1 end #@map = text end#constructor

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  • Testing When Correctness is Poorly Defined?

    - by dsimcha
    I generally try to use unit tests for any code that has easily defined correct behavior given some reasonably small, well-defined set of inputs. This works quite well for catching bugs, and I do it all the time in my personal library of generic functions. However, a lot of the code I write is data mining code that basically looks for significant patterns in large datasets. Correct behavior in this case is often not well defined and depends on a lot of different inputs in ways that are not easy for a human to predict (i.e. the math can't reasonably be done by hand, which is why I'm using a computer to solve the problem in the first place). These inputs can be very complex, to the point where coming up with a reasonable test case is near impossible. Identifying the edge cases that are worth testing is extremely difficult. Sometimes the algorithm isn't even deterministic. Usually, I do the best I can by using asserts for sanity checks and creating a small toy test case with a known pattern and informally seeing if the answer at least "looks reasonable", without it necessarily being objectively correct. Is there any better way to test these kinds of cases?

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  • counting twice in a query, once using restrictions

    - by Andrew Heath
    Given the following tables: Table1 [class] [child] math boy1 math boy2 math boy3 art boy1 Table2 [child] [glasses] boy1 yes boy2 yes boy3 no If I want to query for number of children per class, I'd do this: SELECT class, COUNT(child) FROM Table1 GROUP BY class and if I wanted to query for number of children per class wearing glasses, I'd do this: SELECT Table1.class, COUNT(table1.child) FROM Table1 LEFT JOIN Table2 ON Table1.child=Table2.child WHERE Table2.glasses='yes' GROUP BY Table1.class but what I really want to do is: SELECT class, COUNT(child), COUNT(child wearing glasses) and frankly I have no idea how to do that in only one query. help?

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  • Bag of words Classification

    - by AlgoMan
    I need find words training words and their classification. Simple classification such as . Sports Entertainment and Politics things like that. Where Can i find the words and their classifications. I know many universities have done Bag of words classifications. Is there any repository of training examples ?

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  • Eclipse c++ with mingw comiler cant build boost regex example, can find .a library files

    - by Kim
    Hi, I'm trying to build the boost regex example in eclipse using mingw on vista. I built boost ok with mingw as there are library files XXXX.a. I could build/compile the first boost example that doesnt require any of the compiled boost libraries. When I compile the regex example I get a linker error saying it cant find the library file. I have tried various libray file names eg leave off the .a extension, leave off the lib prefix etc. Now the interesting thing is that if I leave off the library extension and rename the library file to XXX.lib it works and runs ok. So why cant it read the .a library file? It must be my setup somewhere but I dont know where or what to set. From what I read everyone is ok linking the .a file except me :( Thanks in advance, Kim

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  • How to avoid "incomplete implementation" warning in partial base class

    - by garph0
    I have created a protocol that my classes need to implement, and then factored out some common functionality into a base class, so I did this: @protocol MyProtocol - (void) foo; - (void) bar; @end @interface Base <MyProtocol> @end @interface Derived_1 : Base @end @interface Derived_2 : Base @end @implementation Base - (void) foo{ //something foo } @end @implementation Derived_1 - (void) bar{ //something bar 1 } @end @implementation Derived_2 - (void) bar{ //something bar 2 } @end In this way in my code I use a generic id<MyProtocol>. The code works (as long as Base is not used directly) but the compiler chokes at the end of the implementation of Base with a warning: Incomplete implementation of class Base Is there a way to avoid this warning or, even better, a more proper way to obtain this partially implemented abstract base class behavior in Objc?

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  • How can I get Hpricot to play nice with HTML5?

    - by Adam Singer
    I am using Hpricot to parse a theme file. I have noticed, however, that if I feed a valid HTML5 document into Hpricot(), it auto-closes HTML5 tags (like <section>), and messes with the DOCTYPE. Are there any extensions to Hpricot, or perhaps a flag I need to set, that will allow HTML5 documents to be parsed correctly?

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  • What is the best schema design for child collection with a "primary" entity

    - by erg39
    Here is the scenario: You have a Persons table with a one-to-many relationship with an Addresses table, where one of the Address rows is the "primary" Address. Is it better in a normalized schema to Use a Persons.PrimaryAddressID to access the "primary" Address for a Person or Use an Addresses.IsPrimary bit column to reference the "primary" Address for a Person via Addresses.PersonID or Other and why?

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  • operator overloading c++

    - by segfault
    When overloading operators, is it necessary to overload = <= and !=? It seems like it would be smart for c++ to call !operator= for !=, ! for operator<= and !< for operator=. Is that the case, or is it necessary to overload every function?

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  • What speech libraries are available in Linux?

    - by George Edison
    When it comes to TTS (text-to-speech) libraries in Linux, what choices do developers have? What libraries ship with the majority of distros? Are there minimal libraries? What functionality does each library offer? I'm approaching this primarily from a C++ point of view, although Python would suit me too.

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  • Only change img inside children li

    - by steve
    Say my code is as follows: <ul> <li><img /></li> <li> <ul> <li><img /></li> </ul> </li> </ul> I'm trying to set a default size for the first img tag, but not affect the second one. everything I do affects the other one as well. Currently I have tried: $('ul#gallery > li').find('img').css('width','650px'); $('ul#gallery > li img').css('width','650px'); among others, but nothing works.

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  • Anyone have a good solution for scraping the HTML source of a page with content (in this case, HTML

    - by phpwns
    Anyone have a good solution for scraping the HTML source of a page with content (in this case, HTML tables) generated with Javascript? An embarrassingly simple, though workable solution using Crowbar: <?php function get_html($url) // $url must be urlencode(d) { $context = stream_context_create(array( 'http' => array('timeout' => 120) // HTTP timeout in seconds )); $html = substr(file_get_contents('http://127.0.0.1:10000/?url=' . $url . '&delay=3000&view=browser', 0, $context), 730, -32); // substr removes HTML from the Crowbar web service, returning only the $url HTML return $html; } ?> The advantage to using Crowbar is that the tables will be rendered (and accessible) thanks to the headless mozilla-based browser. The problem, of course, is being dependent on on an external web service, especially given that SIMILE seems to undergo regular server maintenance. :( A pure php solution would be nice, but any functional (and reliable) alternatives would be great.

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