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• extract a specific part from a html document , php cURL , php, preg_match

  - by user331071

  Hello ! I'm trying to extract some information from a webpage using php cURL+preg_match or any other function but for some reasons it doesn't work at all . For example from this page http://www.foxtons.co.uk/search?location_ids=1001-29&property_id=712128&search_form=map&search_type=LL&submit_type=search I want to extract the title which is "4 bed house to rent, Caroline Place, Bayswater, W2", the price which is "2,300" and the description which starts at "This fantastic..." and ends at "(Circle and District Lines). " I tried to use php cURL + dom but I'm getting a lot of errors like this "htmlParseEntityRef: expecting ';' in Entity, line: 243" and no result displayed Also I tried to use preg_match or preg_match_all but doesn't work either . A very basic example would be highly appreciated ! thank you !

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• Interpolation and Morphing of an image in labview and/or openCV

  - by Marc

  I am working on an image manipulation problem. I have an overhead projector that projects onto a screen, and I have a camera that takes pictures of that. I can establish a 1:1 correspondence between a subset of projector coordinates and a subset of camera pixels by projecting dots on the screen and finding the centers of mass of the resulting regions on the camera. I thus have a map proj_x, proj_y <-- cam_x, cam_y for scattered point pairs My original plan was to regularize this map using the Mathscript function griddata. This would work fine in MATLAB, as follows [pgridx, pgridy] = meshgrid(allprojxpts, allprojypts) fitcx = griddata (proj_x, proj_y, cam_x, pgridx, pgridy); fitcy = griddata (proj_x, proj_y, cam_y, pgridx, pgridy); and the reverse for the camera to projector mapping Unfortunately, this code causes Labview to run out of memory on the meshgrid step (the camera is 5 megapixels, which apparently is too much for labview to handle) I then started looking through openCV, and found the cvRemap function. Unfortunately, this function takes as its starting point a regularized pixel-pixel map like the one I was trying to generate above. However, it made me hope that functions for creating such a map might be available in openCV. I couldn't find it in the openCV 1.0 API (I am stuck with 1.0 for legacy reasons), but I was hoping it's there or that someone has an easy trick. So my question is one of the following 1) How can I interpolate from scattered points to a grid in openCV; (i.e., given z = f(x,y) for scattered values of x and y, how to fill an image with f(im_x, im_y) ? 2) How can I perform an image transform that maps image 1 to image 2, given that I know a scattered mapping of points in coordinate system 1 to coordinate system 2. This could be implemented either in Labview or OpenCV. Note: I am tagging this post delaunay, because that's one method of doing a scattered interpolation, but the better tag would be "scattered interpolation"

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• Sandboxed Javascript Execution in an Internet Explorer Extension (BHO)

  - by TelegramSam

  Firefox has the Sandbox and evalInSandbox(). Chrome has sandboxed execution in their content scripts (they call it isolated execution). I'm looking for the same thing in an IE browser extension. I can load a javascript file, then call evalScript(), but the code executes in the same environment as javascript that exists on the page. I need a way to run my library (which includes and is based on jQuery) in an sandboxed/isolated environment, but still allow it to modify the DOM as if it were running on the page. Jint looks promising, but cannot currently evaluate jQuery. (They can parse it.) How can I do this?

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• R and version control for the solo data analyst

  - by Jeromy Anglim

  Many data analysts that I respect use version control. For example: http://github.com/hadley/ See comments on http://permut.wordpress.com/2010/04/21/revision-control-statistics-bleg/ However, I'm evaluating whether adopting a version control system such as git would be worthwhile. A brief overview: I'm a social scientist who uses R to analyse data for research publications. I don't currently produce R packages. My R code for a project typically includes a few thousand lines of code for data input, cleaning, manipulation, analyses, and output generation. Publications are typically written using LaTeX. With regards to version control there are many benefits which I have read about, yet they seem to be less relevant to the solo data analyst. Backup: I have a backup system already in place. Forking and rewinding: I've never felt the need to do this, but I can see how it could be useful (e.g., you are preparing multiple journal articles based on the same dataset; you are preparing a report that is updated monthly, etc) Collaboration: Most of the time I am analysing data myself, thus, I woudln't get the collaboration benefits of version control. There are also several potential costs involved with adopting version control: Time to evaluate and learn a version control system A possible increase in complexity over my current file management system However, I still have the feeling that I'm missing something. General guides on version control seem to be addressed more towards computer scientists than data analysts. Thus, specifically in relation to data analysts in circumstances similar to those listed above: Is version control worth the effort? What are the main pros and cons of adopting version control? What is a good strategy for getting started with version control for data analysis with R (e.g., examples, workflow ideas, software, links to guides)?

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• how to install posix in php

  - by Nizzy

  posix does not appear when I run php -m cmd, however, I see it from the phpinfo() –enable-posix=shared on Linux with Plesk 9. Basically, I can't use posix_*() functions as described at http://www.php.net/manual/en/ref.posix.php this shows doesn't exists: if (function_exists(‘posix_getuid’)) { echo “posix_getuid available”; } else { echo “posix_getuid not available”; // this prints in my server. } could someone show me how to install it? thank you [PHP Modules] bz2 calendar ctype curl date dbase dom exif fileinfo filter ftp gd geoip gettext gmp hash iconv imap ionCube Loader json libxml mbstring mcrypt memcache mhash mysql mysqli openssl pcntl pcre PDO pdo_mysql pdo_sqlite readline Reflection session shmop SimpleXML sockets SPL sqlite standard tokenizer wddx xml xmlreader xmlwriter xsl zip zlib

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• Relation between [[Prototype]] and prototype in JavaScript

  - by Claudiu

  From http://www.jibbering.com/faq/faq_notes/closures.html : Note: ECMAScript defines an internal [[prototype]] property of the internal Object type. This property is not directly accessible with scripts, but it is the chain of objects referred to with the internal [[prototype]] property that is used in property accessor resolution; the object's prototype chain. A public prototype property exists to allow the assignment, definition and manipulation of prototypes in association with the internal [[prototype]] property. The details of the relationship between to two are described in ECMA 262 (3rd edition) and are beyond the scope of this discussion. What are the details of the relationship between the two? I've browsed through ECMA 262 and all I've read there is stuff like: The constructor’s associated prototype can be referenced by the program expression constructor.prototype, Native ECMAScript objects have an internal property called [[Prototype]]. The value of this property is either null or an object and is used for implementing inheritance. Every built-in function and every built-in constructor has the Function prototype object, which is the initial value of the expression Function.prototype Every built-in prototype object has the Object prototype object, which is the initial value of the expression Object.prototype (15.3.2.1), as the value of its internal [[Prototype]] property, except the Object prototype object itself. From this all I gather is that the [[Prototype]] property is equivalent to the prototype property for pretty much any object. Am I mistaken?

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• Mono webbrowser

  - by mydiscogr

  Hi to all, I'm a new to mono enviroment and I have some question to ask... I'm trying to make a "browser" that display me a web page, well in windows NET is easy I can use Form.Window.WebBrowser. So I test with Moma this app, and it notice me that I can't use Form.Window.Webbroser " mac osx not compatible", Well I search around the web and I find this http://www.novell.com/coolsolutions/feature/14918.html but honestly I don't understand why I should use Gdk, and glade so I try to "add reference" to visual studio 2010 RC but I find Monodoc.GeckoHtmlRend then I find an other way using Mono.WebBrowser.dll but again Mono.WebBrowser Mono.WebBrowser.DOM Well my question are: where find documentation about one or other libs if I "add reference..." using menu of visual 2010 rc the dll linked is needed in release file or all library needed is included in release assembly? Thanks

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• jquery set focus on dynamic content?

  - by Alan

  In jquery I've appended a <li> element to an unordered list. How do I focus on the newly created <li> ? If I do the following: $("ul").append('<li><input type="text">hi!</input></li>'); $("li:last").focus(); //doesn't work because new <li> isn't in dom yet the focus doesn't work, as noted above. I know jquery 1.4.2 has a live() event handler which allows you load event handlers to dynamically added elements, but I'm not sure what I'm doing wrong: $(document).ready(function () { $('li').live('load', function () { alert("hi!"); $("li:last").focus(); }); });

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• z-Index overlay in google maps version 3

  - by fredrik

  Hi, I'm trying to get an overlay in google maps api v3 to appear above all markers. But it seems that the google api always put my overlay with lowest z-index priority. Only solution i've found is to iterate up through the DOM tree and manually set z-index to a higher value. Poor solution. I'm adding my a new div to my overlay with: onclick : function (e) { var index = $(e.target).index(), lngLatXYposition = $.view.overlay.getProjection().fromLatLngToDivPixel(this.getPosition()); icon = this.getIcon(), x = lngLatXYposition.x - icon.anchor.x, y = lngLatXYposition.y - icon.anchor.y $('<div>test</div>').css({ left: x, position: 'absolute', top: y + 'px', zIndex: 1000 }).appendTo('.overlay'); } I've tried every property I could think of while creating my overlay. zIndex, zPriority etc. I'm adding my overlay with: $.view.overlay = new GmapOverlay( { map: view.map.gmap }); And GmapOverlay inherits from new google.maps.OverlayView. Any ideas? ..fredrik

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• Anobody succeeded in using ICEFaces with jQuery?

  - by hubertg

  Basically jquery is usable with IceFaces. Then only problem arises when partial updates of the page are used. For example you have a panelgroup where a jquery datepicker element (jquery UI datepicker plugin) is used. If the panelGroup is visible from the beginning it's no problem. The jquery call to jQuery(".datepicker").datepicker finds the input and jquery can do it's magic. But if the panelGroup is shown because of a partial update of the page (because the visible propery is changed) jquery is not called again. Does anybody has a solution to this problem? Basically the idea would be that jquery is run each time the dom has changed.

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• AjaxSubmit File Upload - Trying to get response $(document).ready() to fire

  - by ncyankee

  I'm using the jquery form plugin (http://malsup.com/jquery/form/) to upload a file via ajax which is processed in the background. The upload is working correctly, and I am using ASP.Net MVC to return a partial view which contains a $(document).ready call to setup a 'timer' to check on the status of the upload file's processing status. When I return the partial view which contains a script block wit ha $(document).ready call, it is never fired, therefore the 'timer' to check for the status of the upload is never started. When I do this via a regular $.post call (without upload) the function fires correctly after the html is loaded into the DOM. Is there anything else I need to do when calling the ajaxSubmit function to get this to fire? Just a sample bit of code: $('form').live('submit', function () { $(this).ajaxSubmit({ success: function (data) { $('#statusDiv').html(data); } }); return false; });

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• Trying to issue a mouseclick event on a QWebElement in QWebView QtWebKit

  - by Bad Man

  I'm trying to send a mouse click event on a certain element in the QtWebKit DOM but I'm obviously doing it wrong: QWebElement el=this->page()->mainFrame()->findFirstElement("input[type=submit]"); el.setFocus(); QMouseEvent pressEvent(QMouseEvent::MouseButtonPress, el.geometry().center(), Qt::MouseButton::LeftButton, Qt::LeftButton, Qt::NoModifier); QCoreApplication::sendEvent(this->page()->mainFrame(), &pressEvent); QMouseEvent releaseEvent(QMouseEvent::MouseButtonRelease, el.geometry().center(), Qt::MouseButton::LeftButton, Qt::LeftButton, Qt::NoModifier); QCoreApplication::sendEvent(this->page()->mainFrame(), &releaseEvent); Any ideas? (p.s. I am extending QWebView if it wasn't obvious)

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• JQuery UI sortable is slow in IE8, but works good in IE7 and IE8 compatible mode

  - by artvolk

  JQuery UI sortable (including demos) are slow in all IE8 I can test, but runs smoothly in IE7 and IE8 compatible mode. The more complex is a markup on the page, the more IE8 is slowing down (that's I can understand, the DOM tree became more complex). I'm using JQuery 1.3.2 and JQuery UI 1.7.2 (tested with 1.7.3 -- the same story). I've found a lot of similar reports (for the new JQuery UI 1.8.x with JQuery 1.4 too), but no answers. May be there is a some solution (EXCEPT turning IE8 into IE7 compatibility mode by metatag or header). Thanks in advance!

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• how do I filter special charactors while pursing??

  - by mathew

  hi I am doing html pursing with php dom document I am getting some special charators in my result how do I filter the same?? foreach ($fdats as $fdat) { foreach($fdat->getElementsByTagName('a') as $mdat) { $comb[] = trim($mdat->nodeValue); } } and the HTML is something like this <div class="content1" id="user" style="width: 47%; margin-right: 20px;"> <div class="ad first_row"> <p class="ad" style="width: 70%;"> <a href="/site/users"><img class="dynamic-icon">&nbsp; James</a> </p> the out put is  James, and how do I get rid of Â

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• ext gwt textbox new handler

  - by user153506

  i have a textbox received from designer.but i wrote action in GWT. the problem is textbox is empty but when textbox is filled by value by pressing button then alert box will be displayed informed that value has been changed. but not worked.help me. TextBox zip1 = null; function onModuleLoad() { zip1 = TextBox.wrap(DOM.getElementById("zip1")); zip1.addChangeHandler(zip1ChangeAction()); } private ChangeHandler zip1ChangeAction() { return new ChangeHandler() { public void onChange(ChangeEvent event) { Window.alert("change fired"); } };

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• Is detecting scrollbar presence with jQuery still difficult?

  - by donpal

  I know that detecting scrollbar presence is supposed to be one of those illusive things that we should all have to suffer through. What I've read so far is that you can't really detect scrollbar presence, only use hints in the DOM to know if they may be present, and it can't be done in less than 30 lines of code. This sounds a little impossible to me now that we're in 2010. Does jQuery have a cross-browser reliable solution that takes care of this and works at least most of the time? Any help please, I'm pulling my hair, half of it is already on the floor.

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• Spring Security 3.0 and Active Directory LDAP: DOMAIN\user login

  - by Bernd Haug

  I would like to have users authenticate against an ActiveDirectory LDAP server using the DOMAIN\user.name syntax. I think that should be possible with SpringSec 3.0 since the docs mention an "alternative syntax" which I guess refers to the DOM\user syntax instead of a bind DN, but the docs don't elaborate further. Is there some way to configure Spring Sec 3 LDAP to use "the MS way" or do I have to write my own Authenticator implementation (against e.g. the java.naming.directory package, which I've tested to be able to use the MS syntax as its SECURITY_PRINCIPAL)?

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• Subset a data.frame by list and apply function on each part, by rows

  - by aL3xa

  This may seem as a typical plyr problem, but I have something different in mind. Here's the function that I want to optimize (skip the for loop). # dummy data set.seed(1985) lst <- list(a=1:10, b=11:15, c=16:20) m <- matrix(round(runif(200, 1, 7)), 10) m <- as.data.frame(m) dfsub <- function(dt, lst, fun) { # check whether dt is `data.frame` stopifnot (is.data.frame(dt)) # check if vectors in lst are "whole" / integer # vector elements should be column indexes is.wholenumber <- function(x, tol = .Machine$double.eps^0.5) abs(x - round(x)) < tol # fall if any non-integers in list idx <- rapply(lst, is.wholenumber) stopifnot(idx) # check for list length stopifnot(ncol(dt) == length(idx)) # subset the data subs <- list() for (i in 1:length(lst)) { # apply function on each part, by row subs[[i]] <- apply(dt[ , lst[[i]]], 1, fun) } # preserve names names(subs) <- names(lst) # convert to data.frame subs <- as.data.frame(subs) # guess what =) return(subs) } And now a short demonstration... actually, I'm about to explain what I primarily intended to do. I wanted to subset a data.frame by vectors gathered in list object. Since this is a part of code from a function that accompanies data manipulation in psychological research, you can consider m as a results from personality questionnaire (10 subjects, 20 vars). Vectors in list hold column indexes that define questionnaire subscales (e.g. personality traits). Each subscale is defined by several items (columns in data.frame). If we presuppose that the score on each subscale is nothing more than sum (or some other function) of row values (results on that part of questionnaire for each subject), you could run: > dfsub(m, lst, sum) a b c 1 46 20 24 2 41 24 21 3 41 13 12 4 37 14 18 5 57 18 25 6 27 18 18 7 28 17 20 8 31 18 23 9 38 14 15 10 41 14 22 I took a glance at this function and I must admit that this little loop isn't spoiling the code at all... BUT, if there's an easier/efficient way of doing this, please, let me know!

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• LXML E builder for java?

  - by directedition

  There is one thing I really love about LXML, and that the E builder. I love that I can throw XML together like this: message = E.Person( E.Name( E.First("jack") E.Last("Ripper") ) E.PhoneNumber("555-555-5555") ) To make: <Person> <Name> <First>Jack</First> <Last>Ripper</Last> </Name> <PhoneNumber>555-555-5555</PhoneNumber> </Person> As opposed to the painstaking way DOM works. I am going to be moving a bunch of my software to Java soon and it is very very heavy on its usage of E. Does Java have anything near equivalent to that usage?

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• Front End Developer v/s PHP-MySQL Engineer

  - by user301943

  Hello, I want to decide which of this would be a more viable career option? I am ready to quit my current job and hence I am looking for new opportunity. Current job is maintainence and no more active development. My current role is of a PHP/MySQL Developer. I very well understand web-programming and am comfortable with RoR/Sinatra/Zend MVC/JQuery/JSON manipulation, etc. I understand MySQL InnoDB/MyISAM engine and how one differs from the other, etc. Basically, I could very well manage the deployment of a web-application end-to-end including configuration of Apache/Nginx servers, memcache,etc On the other hand, I am being offered a Sr.Front End Web developer that would require me to extensively write HTML/CSS crossbrowser/crossplatform compliant code. I very well understand XHTML/CSS/Box model etc. I would be working on Drupal for the management of websites. While I understand continuing to work on server-side technologies would always be a good career path, how would the role of Core front-end developer turn out to be? If I take this opportunity, will I eventually get a chance to focus onto UCD, HCI, Information Architect,etc. So are these kinda roles possible if I focus on front end development? No offenses to the Front end developers, just want to understand if this is something I want to gain a mastery over. I have 2 yrs of industry experience after graduating with a MS-Computer Science. Although, I have a CS degree, if I were to take uip serious front-end role; I could probably go back and take up some design/HCI/UI courses. Please advise.

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• Library to parse ERB files

  - by Douglas Sellers

  I am attempting to parse, not evaluate, rails ERB files in a Hpricot/Nokogiri type manner. The files I am attempting to parse contain HTML fragments intermixed with dynamic content generated using ERB (standard rails view files) I am looking for a library that will not only parse the surrounding content, much the way that Hpricot or Nokogiri will but will also treat the ERB symbols, <%, <%= etc, as though they were html/xml tags. Ideally I would get back a DOM like structure where the <%, <%= etc symbols would be included as their own node types. I know that it is possible to hack something together using regular expressions but I was looking for something a bit more reliable as I am developing a tool that I need to run on a very large view code base where both the html content and the erb content are important. For example, content such as: blah blah blah <divMy Great Text <%= my_dynamic_expression %</div Would return a tree structure like: root - text_node (blah blah blah) - element (div) - text_node (My Great Text ) - erb_node (<%=)

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• Missing ideas in programming language design

  - by meyka

  I wanted to try something new and so I designed some programming languages and wrote interpreters for them: A rather low-level, not very expressive language. (I didn't want to parse complex expressions right at the beginning) It featured: Variables (yay) Subroutines, with a call stack Basic arithmetic functions, basic string manipulation, ... Code in the language looks like this: set i 0 inc i print i Very, very basic you see. A more high-level language I decided to make it structured and so it featured things like if-else, while, functions, and so on. The stuff most programming languages have. Ended up like a unworthy Python clone, I hated that. A code-golf language Which ended up similar to J, golfcode, APL, etc. Nothing special As you can see: I don't lack the skills but the ideas. I can't figure out anything new, not even bad, unneccessary things, for my languages. - Do you know of some weird things I could implement in my languages, which don't try to make programming harder (like most esoteric languages) but funnier or more different from other languages? It can't be possible that every weird thing has been tried out so far, or?

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• import txt files using excel interop in C# (QueryTables.Add)

  - by kite

  Hi all, I am trying to insert text files into excel cell using Querytables.Add; no error, but the worksheet is empty. except for the single cell manipulation using Value2 property. I already using macro to record the object used. Can you help me on this(I am using vs2008, C# , excel 2003 and 2007; both shown empty cell). Below is my code; thanks for your help Application application = new ApplicationClass(); try { object misValue = Missing.Value; wbDoc = application.Workbooks.Open(flnmDoc, misValue, misValue, misValue, misValue, misValue, misValue, misValue, misValue, misValue, misValue, misValue, misValue, misValue, misValue); wsRefDocBudgetOwner = (Worksheet)wbDoc.Worksheets[2]; Range lRange = wsRefDocBudgetOwner.get_Range("B2", "B25"); var temp2 = wsRefDocBudgetOwner.QueryTables; var temp = temp2.Add(@"TEXT;d:\temp\config ssas.txt", lRange, Type.Missing); //temp.RefreshStyle = XlCellInsertionMode.xlInsertDeleteCells; //temp.RefreshOnFileOpen = true; wsRefDocBudgetOwner.get_Range("B1", "B1").Value2 = "Lgfdgast adsffdafadfads"; wbDoc.Save(); //wbDoc.SaveAs(flnmDoc2, misValue, misValue, misValue, misValue, misValue, XlSaveAsAccessMode.xlExclusive, // misValue, misValue, misValue, misValue, misValue); wbDoc.Close(Missing.Value, Missing.Value, Missing.Value); } finally { application.Quit(); }

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• Is there an HTML browser rendering engine for Ruby?

  - by Jose

  Given a URL, I would like to be able to render the returned HTML to know width and height for each div, fonts' size for each piece of text, color of each element, position of each element on screen, etc. A possible approach could be traversing the DOM tree with Hpricot and checking CSS style by parsing the associated stylesheet using css_parser gem. But this would not consider default styles, inheritance, floats, etc. In Java there's Cobra, a Java Web Renderer, which is able to render a web page and query attributes like width, font size, etc. for each fragment. I could use Cobra with JRuby or similar solutions, but prefer a Ruby native tool. Is there any library like this for Ruby?

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• Reinterpret a CGImageRef using PyObjC in Python

  - by Michael Rondinelli

  Hi, I'm doing something that's a little complicated to sum up in the title, so please bear with me. I'm writing a Python module that provides an interface to my C++ library, which provides some specialized image manipulation functionality. It would be most convenient to be able to access image buffers as CGImageRefs from Python, so they could be manipulated further using Quartz (using PyObjC, which works well). So I have a C++ function that provides a CGImageRef representation from my own image buffers, like this: CGImageRef CreateCGImageRefForImageBuffer(shared_ptr<ImageBuffer> buffer); I'm using Boost::Python to create my Python bridge. What is the easiest way for me to export this function so that I can use the CGImageRef from Python? Problems: The CGImageRef type can't be exported directly because it is a pointer to an undefined struct. So I could make a wrapper function that wraps it in a PyCObject or something to get it to send the pointer to Python. But then how do I "cast" this object to a CGImageRef from Python? Is there a better way to go about this?

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