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  • Image rendering on browser or temporary images?

    - by Muralha
    I'm trying to make a statistics page where it will show several data and charts. The charts need to be pictures so that the user can save it/drag-and-drop to his/her personal reports. I'm using Gruff Graphs for Ruby to produce the charts but I don't know the best way to display the results safe and protected. Some of my ideas/tries are: save the chart to a file (jpg, png)? problem: data is available to anyone (don't have access to cron, to delete data from time to time) render in the browser (has to work on IE)? Use javascript (Raphaël—JavaScript Library) or Google API and output a PDF report (need plugin or gem, right)? use send_data? i've tried to output other way than inline, because I needs to show other data, is it possible? Thanks for any help.

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  • Creating a spam list with a web crawler in python

    - by user313623
    Hey guys, I'm not trying to do anything malicious here, I just need to do some homework. I'm a fairly new programmer, I'm using python 3.0, and I having difficulty using recursion for problem-solving. I've been stuck on this question for quite a while. Here's the assignment: Write a recursive method spam(url, n) that takes a url of a web page as input and a non-negative integer n, collects all the email address contained in the web page and adds them to a global dictionary variable spam_dict, and then recursively calls itself on every http hyperlink contained in the web page. You will use a dictionary so only one copy of every email address is save; your dictionary will store (key,value) pairs (email, email). The recursive call should use the parameter n-1 instead of n. If n = 0, you should collect the email addresses but no recursive calls should be made. The parameter n is used to limit the recursion to at most depth n. You will need to use the solutions of the two above problems; you method spam() will call the methods links2() and emails() and possibly other functions as well. Notes: 1. running spam() directly will produce no output on the screen; to find your spam_dict, you will need to read the value of spam_dict, and you will also need to reset it to the empty dictionary before every run of spam. 2. Recall how global variables are used. Usage: spam_dict = {} spam('http://reed.cs.depaul.edu/lperkovic/csc242/test1.html',0) spam_dict.keys() dict_keys([]) spam_dict = {} spam('http://reed.cs.depaul.edu/lperkovic/csc242/test1.html',1) spam_dict.keys() dict_keys(['[email protected]', '[email protected]']) So far, I've written a function that traverses web pages and puts all the links in a nice little list, and what I wanted to do was call that functions. And why would I use recursion on a dictionary? And how? I don't understand how n ties into all of this. def links2(url): content = str(urlopen(url).read()) myparser = MyHTMLParser() myparser.feed(content) lst = myparser.get() mergelst = [] for link in lst: mergelst.append(urljoin(lst[0],link)) print(mergelst) Any input (except why spam is bad) would be greatly appreciated. Also, I realize that the above function could probably look better, if you have a way to do it, I'm all ears. However, all I need is the point is for the program to produce the proper output.

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  • Jquery Event onChange for Div

    - by David
    I have a page with the following two divs: <div id="searchResults"> </div> <div class="postSearchOptions" style="display: none;"> </div> Is there any way that I can make the "postSearchOptions" div appear when the "searchResults" div is updated by an AJAX call? I don't control the AJAX calls and I want to detect any change in the "searchResults" div. I tried writing the following JQuery code, but then realized that it requires Jquery 1.4 and I only have 1.3: $("#searchResults").live("change", function() { $(".postSearchOptions").css("display", "inline"); }); Is there any way to catch the event of the searchResults div changing using either standard JavaScript or Jquery 1.3? Thanks!

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  • Is it possible to create your own custom locale

    - by smerlin
    Since Windows doesnt have a C++ locale with UTF8 support by default, i would like to construct a custom locale object which supports UTF8 (by creating it with a custom ctype facet). How can i construct a locale object with a my own ctype implementation (i only found functions to construct a locale using an already existing locale as base..) If C++ does not support construction of locales with a custom ctype facet at all, why is that so ?

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  • Combinations and Permutations in F#

    - by Noldorin
    I've recently written the following combinations and permutations functions for an F# project, but I'm quite aware they're far from optimised. /// Rotates a list by one place forward. let rotate lst = List.tail lst @ [List.head lst] /// Gets all rotations of a list. let getRotations lst = let rec getAll lst i = if i = 0 then [] else lst :: (getAll (rotate lst) (i - 1)) getAll lst (List.length lst) /// Gets all permutations (without repetition) of specified length from a list. let rec getPerms n lst = match n, lst with | 0, _ -> seq [[]] | _, [] -> seq [] | k, _ -> lst |> getRotations |> Seq.collect (fun r -> Seq.map ((@) [List.head r]) (getPerms (k - 1) (List.tail r))) /// Gets all permutations (with repetition) of specified length from a list. let rec getPermsWithRep n lst = match n, lst with | 0, _ -> seq [[]] | _, [] -> seq [] | k, _ -> lst |> Seq.collect (fun x -> Seq.map ((@) [x]) (getPermsWithRep (k - 1) lst)) // equivalent: | k, _ -> lst |> getRotations |> Seq.collect (fun r -> List.map ((@) [List.head r]) (getPermsWithRep (k - 1) r)) /// Gets all combinations (without repetition) of specified length from a list. let rec getCombs n lst = match n, lst with | 0, _ -> seq [[]] | _, [] -> seq [] | k, (x :: xs) -> Seq.append (Seq.map ((@) [x]) (getCombs (k - 1) xs)) (getCombs k xs) /// Gets all combinations (with repetition) of specified length from a list. let rec getCombsWithRep n lst = match n, lst with | 0, _ -> seq [[]] | _, [] -> seq [] | k, (x :: xs) -> Seq.append (Seq.map ((@) [x]) (getCombsWithRep (k - 1) lst)) (getCombsWithRep k xs) Does anyone have any suggestions for how these functions (algorithms) can be sped up? I'm particularly interested in how the permutation (with and without repetition) ones can be improved. The business involving rotations of lists doesn't look too efficient to me in retrospect. Update Here's my new implementation for the getPerms function, inspired by Tomas's answer. Unfortunately, it's not really any fast than the existing one. Suggestions? let getPerms n lst = let rec getPermsImpl acc n lst = seq { match n, lst with | k, x :: xs -> if k > 0 then for r in getRotations lst do yield! getPermsImpl (List.head r :: acc) (k - 1) (List.tail r) if k >= 0 then yield! getPermsImpl acc k [] | 0, [] -> yield acc | _, [] -> () } getPermsImpl List.empty n lst

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  • Aligning a formtable with button

    - by Hulk
    In the below code how to align the the print button next to the table and not below or above it. <div id="content"> <form action="Empform" method="post" name="emp"> <tr><th>Name</t></tr> <tr><td></td></tr> </table> <br> <br> <label>Comments: </label> <br> <textarea rows=10 cols=75></textarea> </form> <input type="button" value="Copy" id="print" onclick="javascript:copy();" style="display:inline;/> <br> </div> Thanks..

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  • JavaScript/jQuery short hand function definitions

    - by Baddie
    I'm using a jQuery plugin that has its functions defined as such: $('#mydiv').pluginAction({ someproperty: val, format: 'mm hh', labels: ['yes', 'no', 'maybe'], labels1: ['never', 'always'] }); In my HTML page, I have multiple DIVs that have the same properties for format, labels, labels1, but different values for someproperty. Is there some type of JavaScript notation I can take advantage of to shorten the definition so that I don't have to have duplicate code?

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  • Error while compiling the Xcode project (IPhone)

    - by Sridhar
    Hello, I added ffmpeg iphone port into my library and I can able to use a few of its functions like avcodec_init(),.. without any errors. But when I include this function call "avcodec_register_all" Xcode is giving error after compilation The error message is : *--------------- ld: ldr 12-bit displacement out of range (4276 max +/-4096) in _CFRelease$stub in _CFRelease$stub from /Users/foxit/Documents/CameraTest/build/CameraTest.build/Debug-iphoneos/CameraTest.build/Objects-normal/armv6/CameraTest Command /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc-4.2 failed with exit code 1 *------------- Does anyone know whats wrong with this ? Regards, Raghu

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  • Invoking a PL/SQL function from EclipseLink

    - by Mark Robinson
    I'm trying to execute a PL/SQL function in EclipseLink which uses Oracle Specific types(eg. Boolean). I've tried using PLSQLStoredProcedureCall which complains that I'm not executing a procedure and I have tried using StoredFunctionCall but that returns PLS-00382: expression is of wrong type Has anyone developed a solution to invoke functions in EclipseLink with Oracle Types? I have heard that it would be possible to extend StoredFunctionCall but I'd rather leverage existing functionality as much as possible.

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  • get Generic CRUD operation in EF

    - by kathy
    Hello, Is there any way or design pattern can I use to get Generic CRUD operations? Because I’m working on n-tire application using EF in the data layer and I don’t want to use CRUD Functions in Every Entities. Your help would be appreciated

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  • MATLAB: Reading floating point numbers and strings from a file

    - by xsound
    I am using the following functions for writing and reading 4098 floating point numbers in MATLAB: Writing: fid = fopen(completepath, 'w'); fprintf(fid, '%1.30f\r\n', y) Reading: data = textread(completepath, '%f', 4098); where y contains 4098 numbers. I now want to write and read 3 strings at the end of this data. How do I read two different datatypes? Please help me. Thanks in advance.

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  • ImageCaptureCore documentation

    - by Marc Rochkind
    There are a few overviews in the OS X 10.6 docs that I access via XCode, and a bunch of examples, but the actual reference docs seem to be absent. I was able to figure things out by reading the inline comments in the header files (e.g., ICCameraDevice.h), which looks like the source for the XCode docs. Is there a way to install these docs? The biggest problem with the overview writeups and the examples is that they assume you have a GUI. The whole point of ImageCaptureCore, vs. ImageKit, as I understand it is that you don't have a GUI, or want to have your own (my case). Anyone else have a good time figuring out how these APIs work? Way too much work! --Marc

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  • printf and formatting rules

    - by Stringer Bell
    I'd like to know if all formatting rules of printf functions currently work (or are implemented) in F# ? For instance, if I want to align arguments on 9 characters (padding with spaces or 0), I would use: printfn "%9A %9A" arg1 arg2 //don't seem to work Thanks!

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  • How do I step through and debug a Scheme program using Dr. Racket?

    - by Thomas Owens
    I'm using the Dr. Racket development environment and the language definition #lang scheme to do work for a course. However, I'm not sure how to best use this tool for debugging. I would like to be able to execute a function and step through it, observing the values of different functions at various points in execution. Is this possible? If not, what is the typical method of stepping through the execution of a Scheme program and debugging it?

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  • Any way to automatically wrap comments at column 80 in Visual Studio 2008? ..or display where column

    - by Jon Cage
    Is there any way to automatically wrap comments at the 80-column boundary as you type them? ..or failing that, any way to display a faint line at the coulmn 80 boundary to make wrapping them manually a little easier? Several other IDEs I use have one or other of those functions and it makes writing comments that wrap in sensible places much easier/quicker. [Edit] If (like me) you're using Visual C++ Express, you need to change the VisualStudio part of the key into VCExpress - had me confused for a while there!

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  • PHP Mcrypt - Encrypting / Decrypting file

    - by whitman6732
    Trying to write a couple of functions that will encrypt or decrypt a file and am using the class found here to try and accomplish this: http://www.itnewb.com/v/PHP-Encryption-Decryption-Using-the-MCrypt-Library-libmcrypt The encryption function below seems to work, in that it appears to encrypt the file and place it in the intended directory. I'm trying to decrypt the file now, and it just dies with the message "Failed to complete decryption" (which is coded in there...) There's nothing in the php error logs, so I'm not sure why it's failing, but as mcrypt is entirely new to me, I'm more than inclined to believe I'm doing something wrong here... Here are the functions: //ENCRYPT FILE function encryptFile() { global $cryptastic; $pass = PGPPASS; $salt = PGPSALT; $key = $cryptastic->pbkdf2($pass, $salt, 1000, 32) or die("Failed to generate secret key."); if ($handle = opendir(PATH.'/ftpd')) { while (false !== ($file = readdir($handle))) { if ($file != "." && $file != "..") { $newfile = PATH.'/encrypted/'.$file.'.txt'; $msg = file_get_contents(PATH.'/ftpd/'.$file); $encrypted = $cryptastic->encrypt($msg, $key) or die("Failed to complete encryption."); $nfile = fopen($newfile, 'w'); fwrite($nfile, $encrypted); fclose($nfile); unlink(PATH.'/ftpd/'.$file); } } closedir($handle); } //DECRYPT FILE function inFTP() { global $cryptastic; $pass = PGPPASS; $salt = PGPSALT; $key = $cryptastic->pbkdf2($pass, $salt, 1000, 32) or die("Failed to generate secret key."); if ($handle = opendir(PATH.'/encrypted')) { while (false !== ($file = readdir($handle))) { if ($file != "." && $file != "..") { $newfile = PATH.'/decrypted/'.$file; $msg = PATH.'/encrypted/'.$file; $decrypted = $cryptastic->decrypt($msg, $key) or die("Failed to complete decryption."); $nfile = fopen($newfile, 'w'); fwrite($nfile, $decrypted); fclose($nfile); //unlink(PATH.'/encrypted/'.$file); } } closedir($handle); } //$crypt->decrypt($file); }

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  • How can I merge properties of two JavaScript objects dynamically?

    - by JC Grubbs
    I need to be able to merge two (very simple) JavaScript objects at runtime. For example I'd like to: var obj1 = { food: 'pizza', car: 'ford' } var obj2 = { animal: 'dog' } obj1.merge(obj2); //obj1 now has three properties: food, car, and animal Does anyone have a script for this or know of a built in way to do this? I do not need recursion, and I do not need to merge functions, just methods on flat objects.

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  • Magento frontend and backend page looks different

    - by itsandy
    Hi All, I am a newb in magento and recently started looking at it to create a store for my client. I am not sure but i tried installing firephp extension and soon after that I’m having my screen looks like the screenshot. ** please check the link provided! Do I have to make any installations to get everything working as normal or what am I suppose to do to go to the normal screen. I have also changed the inline translation option to NO if thats what it requires. Any help would be appreciated. Cheers I have also posted this question on the magento forum http://www.magentocommerce.com/boards/viewthread/193499/

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  • Hidden features of Qt.

    - by Lukasz Lew
    A little is hidden in Qt given splendid documentation. But given vastness of Qt functionality paradoxically many useful features have been overlooked by me (and reimplemented or work-arounded). What Qt functions you wish you have noticed earlier?

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  • In which scenario it is useful to use Disassembly on python?

    - by systempuntoout
    The dis module can be effectively used to disassemble Python methods, functions and classes into low-level interpreter instructions. I know that dis information can be used for: 1. Find race condition in programs that use threads 2. Find possible optimizations From your experience, do you know any other scenarios where Disassembly Python feature could be useful?

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  • Lightweight jQuery ColorPicker bound to input and with popup selector

    - by Scott B
    I've found two jQuery colorpickers that I'm considering using in my app. I have a simple input field that I'm asking users to supply a hex color to. I'd like to use jPicker's "Binded" example, however, the overall size of the jPicker is a bit more than I'd like to add to my app. So that sent me searching and I found a very nifty little compact picker called "Farbtastic", which does exactly what I want with one major exception: It appears to be an inline only solution (meaning, I can't call it in the same manner as jPicker's binded example. Can someone tell me how I might convert Farbtastic to mimic jPicker's binded example? More specifically, I'm looking to place a colorpicker widget (the small color frame icon as in the jPicker example) next to my input field so that it displays the currently selected color, and when clicked, it opens up the color palette widget.

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  • Qhttp request and response debugging.

    - by William Wilson
    OS: Windows XP/Vista Qt version: 4.6.1 Using OpenSSL I need to watch the actual requests and responses that is going through the wire for QHttp requests and responses and in some cases need to interrupt the request. I tried with few of the http debuggers available in the market but they seem to work only for requests that are using the WinInet functions. Unfortunately, the openssldump utility is not present on windows platforms. Thank you.

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