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• Is there any super fast algorithm for finding LINES on picture?

  - by Ole Jak

  So I have Image like this I need some super fast algorithm for finding all straight lines on it. I want to give to algorithm parameters like min length and max line distortion. I want to get relative to picture pixel coords start and end points of lines. So on this picture to find all lines between dalles and thouse 2 black lines on top. So I need algorithm for super fast finding straight lines of different colors on picture. Is there any such algorithm? (super duper fast=)

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• Searching a large list of words in another large list

  - by Christian

  I have a list of 1,000,000 strings with a maximum length of 256 with protein names. Every string has an associated ID. I have another list of 4,000,000,000 strings with a maximum length of 256 with words out of articles and every word has an ID. I want to find all matches between the list of protein names and the list of words of the articles. Which algorithm should I use? Should I use some prebuild API? It would be good if the algorithm runs on a normal PC without special hardware.

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• script to search and replace deprecated functions

  - by user573881

  Hi, I am using the following script to search and replace the deprecated functions in a file with the newer ones. 5 for strFile in `ls deprecated_functions_search_and_replace.txt ` 6 do 7 sed "s/ereg_replace[^\(]*(\([^,]*\),/preg_replace\1('#'.\2.'#',/g" $strFile > temp_file 8 mv $strFile $strFile".bakup" 9 mv temp_file $strFile 10 11 sed "s/eregi[^\(]*(\([^,]*\),/preg_match\1('#'.\2.'#i',/g" $strFile > temp_file 12 mv $strFile $strFile".bakup" 13 mv temp_file $strFile 14 15 sed "s/ereg[^\(]*(\([^,]*\),/preg_match\1('#'.\2.'#',/g" $strFile > temp_file 16 mv $strFile $strFile".bakup" 17 mv temp_file $strFile 18 19 sed "s/split[^\(]*(\([^,]*\),/preg_split\1('#'.\2.'#',/g" $strFile > temp_file 20 mv $strFile $strFile".bakup" 21 mv temp_file $strFile 22 23 sed "s/mysql_escape_string/mysql_real_escape_string/g" $strFile > temp_file 24 mv $strFile $strFile".bakup" 25 mv temp_file $strFile 26 27 sed "s/set_magic_quotes_runtime(0)/\/\/set_magic_quotes_runtime(0)/g" $strFile > temp_file 28 mv $strFile $strFile".bakup" 29 mv temp_file $strFile 30 31 sed "s/ini_get('safe_mode')/false/g" $strFile > temp_file 32 mv $strFile $strFile".bakup" 33 mv temp_file $strFile 34 35 sed "s/session_register('\(.*\)')/$_SESSION['\1']=$\1/g" $strFile > temp_file 36 mv $strFile $strFile".bakup" 37 mv temp_file $strFile 38 39 sed "s/session_unregister('\(.*\)')/$_SESSION['\1']=''/g" $strFile > temp_file 40 mv $strFile $strFile".bakup" 41 mv temp_file $strFile 42 43 done However, when I run this script I am getting an error saying: sed: -e expression #1, char 60: invalid reference \2 on `s' command's RHS sed: -e expression #1, char 52: invalid reference \2 on `s' command's RHS sed: -e expression #1, char 50: invalid reference \2 on `s' command's RHS sed: -e expression #1, char 51: invalid reference \2 on `s' command's RHS I am unable to figure out whats going wrong. Someone please help me. Regards.

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• Formatting text in an html table column?

  - by DavidR

  So, I have a table like below. Imagine there are multiple columns, I thought by formatting the <col/> tag I would be able to change the formatting of every <td> in that column. I want to give data in the first column a text-align:center, but it doesn't seem to work. Is there a way to get this to work other than adding a class to every <td>? <table> <col class="column"/> <tr> ... </tr> <tr> ... </tr> <tr> ... </tr> </table>

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• Javascript crazy idea finding a node

  - by Louis

  I had a crazy (but so crazy that it just might work) idea where every element on a page is created in javascript but given an ID which is a hash of its path in the DOM. So instead of searching through the DOM to find an element, you hash the path and then getElementById() with that hash. Problem with this is getting the path might be more expensive than searching the DOM in the first place. Any ideas how this could be done or if it is just plain stupid?

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• Filter rows on the basis of "First Name" + "Last Name" in SQL

  - by Raghav Khunger

  Hi, I have a user table in my database which contains two columns FirstName and LastName. Now in my front end there is a textbox to filter out the users from this table. Let's suppose I am taking that input from the front end in the form of a input parameter "@SEARCHKEYWORD". I have created a sample below: DECLARE @Test TABLE ([ID] INT IDENTITY, [FNAME] NVARCHAR(100), [LNAME] NVARCHAR(100) ) INSERT INTO @Test( FNAME, LNAME ) SELECT 'John','Resig' UNION ALL SELECT 'Dave','Ward' UNION ALL SELECT 'Peter','Smith' UNION ALL SELECT 'Dave','Smith' UNION ALL SELECT 'Girija','Acharya' UNION ALL SELECT 'Devendra', 'Gujel' UNION ALL SELECT 'Arjit', 'Gupta' DECLARE @SEARCHKEYWORD NVARCHAR(100) SELECT * FROM @Test WHERE FNAME +' '+ LNAME LIKE @SEARCHKEYWORD i.e. so far I have thought of this query to filter out the rows but it is not giving the desired results: SELECT * FROM @Test WHERE FNAME +' '+ LNAME LIKE @SEARCHKEYWORD Here are the desired outputs which I needed for the inputs mentioned below: --WHEN @SEARCHKEYWORD='John Resig' --Desired OUTPUT: the row which contains 'John','Resig' --WHEN @SEARCHKEYWORD='Ac' --Desired OUTPUT: the row which contains 'Girija','Acharya' --WHEN @SEARCHKEYWORD='Smith' --Desired OUTPUT: the row which contains 'Peter','Smith' and 'Dave','Smith' --WHEN @SEARCHKEYWORD='g' --Desired OUTPUT: the row which contains 'Devendra', 'Gujel' and 'Arjit', 'Gupta' --WHEN @SEARCHKEYWORD='Smith' --Desired OUTPUT: the row which contains 'Peter','Smith' and 'Dave','Smith'

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• Scheme Depth-first search of a graph function

  - by John Retallack

  This is a homework question,I'm trying to do a Depth-first search function in Scheme,Here's the code I've written so far: (define explore (?(node visited) (let* ([neighbors (force (cdr node))] [next (nextNode visited neighbors)] [is-visited (member? node visited)]) (cond ;if I have no unvisited neighbours print current node and go up one level [(equal? next #f) (begin (display (car node)) (display " "))] ;if current node is not visited and I have unvisited neighbors ;print current node,mark as visited and visit it's neighbors [(and (equal? is-visited #f) (not (equal? next #f))) (begin (display (car node)) (display " ") (explore next (cons node visited)))]) ;go and visit the next neighbor (if (not (equal? (nextNode (cons next visited) neighbors) #f )) (explore (nextNode (cons next visited) neighbors) (cons node visited)))))) 'node' is the current node 'visited' is a list in witch I keep track of the nodes I visited 'nextNode' is a function that returns the first unvisited neighbor if any or #f otherwise 'member?' test's if a node is in the visited list The Graph representation is using adjacent made using references to nodes with letrec so that's why I use force in 'neighbors': Eg: (letrec ([node1 (list "NY" (delay (list node2 node3)))],where node2 and node3 are defined as node1 The problem witch I'm dealing with is that my visited lists looses track of some of the nodes I visited when I come out of recursion,How can I fix this ?

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• SQL Server 2008 ContainsTable, CTE, and Paging

  - by David Murdoch

  I'd like to perform efficient paging using containstable. The following query selects the top 10 ranked results from my database using containstable when searching for a name (first or last) that begins with "Joh". DECLARE @Limit int; SET @Limit = 10; SELECT TOP @Limit c.ChildID, c.PersonID, c.DOB, c.Gender FROM [Person].[vFullName] AS v INNER JOIN CONTAINSTABLE( [Person].[vFullName], (FullName), IS ABOUT ( "Joh*" WEIGHT (.4), "Joh" WEIGHT (.6)) ) AS k3 ON v.PersonID = k3.[KEY] JOIN [Child].[Details] c ON c.PersonID = v.PersonID JOIN [Person].[Details] p ON p.PersonID = c.PersonID ORDER BY k3.RANK DESC, FullName ASC, p.Active DESC, c.ChildID ASC I'd like to combine it with the following CTE which returns the 10th-20th results ordered by ChildID (the primary key): DECLARE @Start int; DECLARE @Limit int; SET @Start = 10; SET @Limit = 10; WITH ChildEntities AS ( SELECT ROW_NUMBER() OVER (ORDER BY ChildID) AS Row, ChildID FROM Child.Details ) SELECT c.ChildID, c.PersonID, c.DOB, c.Gender FROM ChildEntities cte INNER JOIN Child.Details c ON cte.ChildID = c.ChildID WHERE cte.Row BETWEEN @Start+1 AND @Start+@Limit ORDER BY cte.Row ASC

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• Button inside text box

  - by user542719

  My code shows a button inside a textbox, but when the input value changes, the size of the text box also changes. That I don't like. Is there any solution such that the textbox size remains fixed? Or any other idea on how to create a button inside textbox? The following is my code: JPanel panel = new JPanel(); panel.setLayout( new FlowLayout(FlowLayout.CENTER, 0, 0) ); panel.add(textField); panel.add(button); panel.setBackground( textField.getBackground() ); panel.setBorder( textField.getBorder() ); textField.setBorder(null);

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• solr vs xapian : which one gived you the more meaningful results?

  - by e-satis

  I am currently using whoosh to dev a website, and I'll need to choose something more powerful once the website will be in production. If anyone of you used both of these engines, which one gave you the most meaningful results one the long road?

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• Winforms ComboBox autocomplete search multiple parts of string

  - by studiothat

  Very similar question to this one... http://stackoverflow.com/questions/522521/autocomplete-for-combobox-in-wpf-anywhere-in-text-not-just-beginning but my issue is for windows-forms rather than WPF. I have a winforms databound combox working great with autocomplete list coming from the data items in the combobox. Of course the client wants it to work "better", and that means that they want the autocomplete to work by searching and showing autocomplete options for any matching (contains()) string not just the starting string (startswith()) I know it's probably not just a property that can be set in the combobox, but can anyone point me in the right direction?

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• javascript onkeypressed not giving current text box content

  - by Austin

  I have an html form like this: <form id="boxy" action="layout.html" method="get" accept-charset="utf-8"> <input type="text" id="a" onkeypress="Boxy.Check(this);"> </form> Invoking javascript like this: Boxy.Check = function() { input = document.getElementById(this.currentSelector.id).value; console.log("\"" + input + "\""); }; However, this.value is the previous value before onkeypress. For example, if I just type "A" into the form, console.log() prints "". And if I type "AA", console.log prints "A". Is there a way to get the current content of the input?

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• jQuery jPicker > Assign color of jPicker from a text link (not from jPicker)

  - by Scott B

  I've got a list of frequently used hex colors that I'd like to list under my jPicker bound input text field and I'd like to figure out how to change the value of the jPicker active color without opening the jPicker color selector palette. I've managed to create a function that updates the input field thats bound to the jPicker, but the colors of the background and picker.gif do not update. I'd like to force the background colors to update as if the color was selected from jPicker itself. Here's my code for the activation link... <span onclick=doColor(1,'cc9900')>cc9900</span> And here's the js handler function doColor(el, color) { if(el){$('#theme_header_color').attr('value', color);} else{$('#theme_sidebar_color').attr('value', color);} }

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• Regex for circular replacement

  - by polygenelubricants

  How would you use regex to write functions to do the following: Replace lowercase 'a' with uppercase and vice versa Where words are separated by whitespaces and > and < are special markers, replace >word with word< and vice versa Replace postincrement (i++;) with preincrement (++i;) and vice versa. Variable names are [a-z]+. Input is just a bunch of these statements. Bonus: also do decrement. Also interested in solutions in other flavors. Note: this is NOT a homework question. See also my previous explorations of regex: Regex split into overlapping strings (Alan Moore's answer is especially instructive) Can you use zero-width matching regex in String split? (my solution exploits a known Java regex bug with regards to non-obvious length lookbehind!)

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• Need help troubleshooting why Solr wont start (or why solr admin page wont show)

  - by Camran

  I can't get Solr working. I have Jetty, and my server OS is Ubuntu 9.10. It is a VPS server. So, when I execute the java -jar start.jar everything seems fine. I even do a netstat to check if there are any listeners on the port before the start and after the start, and it seems solr is starting. However, I cant access the admin page. I have even turned off the firewall. Here is some info about my server: I have changed DocumentRoot to var/www/SV/ I have Apache2, PHP5, MySql installed I have "disabled" iptables firewall I have removed the htaccess files (I used them to passw protect my site under develop) I have installed JRE (NOT JDK) on my server. I use the "example" which comes with Solr, so I use Jetty as container on my Server. My Server has 768MB RAM Doing a java -version command shows this: java version "1.6.0_15" Java(TM) SE Runtime Environment (build 1.6.0_15-b03) Java HotSpot(TM) Client VM (build 14.1-b02, mixed mode) And in the terminal the last lines when executing start.jar is: May 29, 2010 1:30:03 PM org.apache.solr.core.SolrCore registerSearcher INFO: [] Registered new searcher Searcher@1dc64a5 main NOTE: Also before this last line, there is a line which makes me suspicious: Started SocketConnector @ 0.0.0.0:8983 // Should this be with leading zeros? Is there any ways you know to troubleshoot this? Memory issue maybe? Thanks

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• String searching algorithms

  - by avd

  For the two string searching algorithms: KMP and suffix tree, which is preferred in which cases? Give some practical examples.

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• Getting values from Multiple Text Entry using Pygtk and Python

  - by Webrsk

  On a click of a button named "Add Textbox" it calls a function which creates a single textbox using (gtk.Entry) function. So each time i click that button it creates a textbox. I have a submit button which should fetches all the values of the text boxes(say 10 textboxes) generated with the name of "entry". It works for one textbox but not for multiple. In php we can create dynamix textboxes mentioning as an array name=entry[]. Do we have similar functionality in python ? Enviroment : FC10 , Glade 3 , Python 2.5 , GTK.

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• Value of text box disapears - binding viewmodel to a tab (content control)

  - by Eli Perpinyal

  Based on the MVVM example by Josh Smith, I have implemented the multi tab option which binds to a different tab to a different view model using a simple datatemplate that binds a viewmodel to a view. <DataTemplate DataType="{x:Type fixtureVM:SearchViewModel}"> <SearchVw:SearchView/> </DataTemplate> The issue that I'm having, is when I switch tabs and then switch back again, the value in the textbox disappears. When I bind the Text in the textbox to a value in the ViewModel it does not disappear. This is fine, and I can overcome this but I am having another issue for example with the position of the scroll bar in a grid disappearing once the tab has lost focus. Why is the value disappearing? I'm assuming it is a WPF sub system task that cleans up resources!? how can I avoid this? I also feel it might be slowing down my app.

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• HTML - Put SELECT tag content into INPUT type = "text"

  - by mouthpiec

  Hi, I have a form in a webpage where I would like to put the selected item in a drop down list into a testbox. The code I have till now is the following: <form action = ""> <select name = "Cities"> <option value="----">--Select--</option> <option value="roma">Roma</option> <option value="torino">Torino</option> <option value="milan">Milan</option> </select> <br/> <br/> <input type="button" value="Test"> <input type="text" name="SelectedCity" value="" /> </form> I think I need to use javascript .... but any help? :-) thanks

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• HttpWebRequest does has empty response requesting a search from Bing

  - by Jarrod Maxwell

  I have the following code that sends a HttpWebRequest to Bing. When I request the url below though it returns what appears to be an empty response when it should be returning a list of results. var response = string.Empty; var httpWebRequest = WebRequest.Create("http://www.bing.com/search?q=stackoverflow&count=100") as HttpWebRequest; httpWebRequest.Method = WebRequestMethods.Http.Get; httpWebRequest.Headers.Add("Accept-Language", "en-US"); httpWebRequest.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Win32)"; httpWebRequest.Headers.Add(HttpRequestHeader.AcceptEncoding, "gzip,deflate"); using (var httpWebResponse = httpWebRequest.GetResponse() as HttpWebResponse) { Stream stream = null; using (stream = httpWebResponse.GetResponseStream()) { if (httpWebResponse.ContentEncoding.ToLower().Contains("gzip")) stream = new GZipStream(stream, CompressionMode.Decompress); else if (httpWebResponse.ContentEncoding.ToLower().Contains("deflate")) stream = new DeflateStream(stream, CompressionMode.Decompress); var streamReader = new StreamReader(stream, Encoding.UTF8); response = streamReader.ReadToEnd(); } } Its pretty standard code for requesting and receiving a web page. Any ideas why the response is empty? Thanks in advance. EDIT I left off a query string parameter in the url. I also had &count=100 which I have now corrected. It seems to work for values of 50 and below but returns nothing when larger. This works ok when in the browser, but not for this web request. It makes me think the issue is that the response is large and HttpWebResponse is not handling that for me the way I have it set up. Just a guess though.

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• Lucene Fuzzy Match on Phrase instead of Single Word

  - by Koobz

  I'm trying to do a fuzzy match on the Phrase "Grand Prarie" (deliberately misspelled) using Apache Lucene. Part of my issue is that the ~ operator only does fuzzy matches on single word terms and behaves as a proximity match for phrases. Is there a way to do a fuzzy match on a phrase with lucene?

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• Changing color of the titlebar, background and text of MFMailComposeViewController

  - by iSharreth

  I am sending email from my iPhone application. Everything working fine, but I want to change the color of the title bar that appears from blue to black and the background color from white to black. Also, all the text to white color. What should I do? Anyone please help! I used the below code: (IBAction)sendMail{ MFMailComposeViewController *mailComposer = [[MFMailComposeViewController alloc]init]; mailComposer.mailComposeDelegate = self; if([MFMailComposeViewController canSendMail]){ [mailComposer setToRecipients: [NSArray arrayWithObjects:@"[email protected]",nil]]; [mailComposer setSubject: nil]; [mailComposer setMessageBody: nil isHTML:NO]; [self presentModalViewController:mailComposer animated: YES]; }

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• OpenStreetMap Proximity search using mySQL

  - by Chris

  Hi, I'm just playing around with a dataset of my region generated by JOSM. I moved it into a mySQL DB with the 0.6 API scheme using Osmosis and now I'm desperately trying the following: I want to get all streets of a city. AFAIK there is no tag/relation in the OSM data to determine this so I tried it using a proximity search to get all nodes in a radius around a node representing the city center. Most of the time I looked at the approaches here: http://stackoverflow.com/questions/574691/mysql-great-circle-distance-haversine-formula What I got is the following SQL code that should get me the closest 100 nodes around the node with id 36187002 and within a radius of 10km. set @nodeid = 36187002; set @dist = 10; select longitude, latitude into @mylon, @mylat from nodes where id=@nodeid limit 1; SELECT id, ( 6371 * acos( cos( radians(@mylon) ) * cos( radians( latitude ) ) * cos( radians( longitude ) - radians(@mylat) ) + sin( radians(@mylon) ) * sin( radians( latitude ) ) ) ) AS distance FROM nodes HAVING distance < @dist ORDER BY distance LIMIT 0 , 100; Well.. it doesn't work. :( I guess the main problem is that OSM lats/lons are multiplied by 10.000.000 and I don't know how I can correct this function to make it work. Any ideas about this? All solutions/alternatives are very welcome! Have a nice weekend! Chris

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• Searching phpbb's 'topic_title' via MYSQL php, but exact match doesn't work

  - by Mint

  $sql = sprintf("SELECT topic_title FROM `phpbb_topics` WHERE `topic_title` LIKE '%%%s%%' LIMIT 20", mysql_real_escape_string('match this title')); Which I run this query in phpMyAdmin the results are: (correct) match this title match this title 002 But when I run that same MYSQL query in PHP I get: (incorrect) match this title 002 I have also tried MATCH AGAINST with the same result with both php and phpMyAdmin: $sql = "SELECT topic_title FROM phpbb_topics WHERE MATCH (topic_title) AGAINST('match this title' IN BOOLEAN MODE)"; Whats going on? I'v been searching all over the place and have found next to no help :(

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• Visual Studio DTE2: how to get text content of the current document

  - by Sylvain

  I developped a package to extend Visual Studio. As part of it, I have a context menu that must process the whole text content of the active document (HTML editor). I understand how to get the current selection : TextSelection txtSelection = (TextSelection)_bllManager.CurrentDocument.Selection; But I dont't understand how to get the whole content of the code window in case nothing is selected. Currently I use a work-around doing txtSelection.SelectAll() but it moves the cursor and I don't want that. Any suggestion ? Thanks.

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