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• How to find longest common substring using trees?

  - by user384706

  The longest common substring problem according to wiki can be solved using a suffix tree. From wiki: The longest common substrings of a set of strings can be found by building a generalised suffix tree for the strings, and then finding the deepest internal nodes which have leaf nodes from all the strings in the subtree below it I don't get this. Example: if I have: ABCDE and XABCZ then the suffix tree is (some branches from XABCZ omitted due to space): The longest common substring is ABC but it is not I can not see how the description of wiki helps here. ABC is not the deepest internal nodes with leaf nodes. Any help to understand how this works?

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• data parsed to database Nokogiri rails

  - by Charlie Allombert

  So I'm just getting started with Nokogiri and Rails I have the following which returns the name of someone. TEST.rb: require 'nokogiri' require 'open-uri' url = "http://www.imdb.com/title/tt1439629/" doc = Nokogiri::HTML(open(url)) puts doc.css("div#wrapper [...too long...]")[0].text Now I created a table in my DB on rails and want to send the returned name to the actor table in the name column! How would I do that ? I can't seem to find atutorial on this... My goal would eventually be to have a rails form where I'd input an IMDB link which would return title and so on... (Also I'm new to ruby rails and programming so please provide easy info!)

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• Retrieve remote XML data with PHP

  - by rrrfusco

  I'm currently reading a regularly updated XML file with PHP (simpleXML). I'd like to reduce calls to the remote server by reading a cache file on my web server, then after some time, retrieving a new copy of the remote file. Is this an accepted practice for reading remote XML files, then parsing? Can anyone offer some suggestions on how to go about this in PHP, or perhaps there are some PEAR classes that deal with this?

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• Why increase pointer by two while finding loop in linked list, why not 3,4,5?

  - by GG

  I had a look at question already which talk about algorithm to find loop in a linked list. I have read Floyd's cycle-finding algorithm solution, mentioned at lot of places that we have to take two pointers. One pointer( slower/tortoise ) is increased by one and other pointer( faster/hare ) is increased by 2. When they are equal we find the loop and if faster pointer reaches null there is no loop in the linked list. Now my question is why we increase faster pointer by 2. Why not something else? Increasing by 2 is necessary or we can increase it by X to get the result. Is it necessary that we will find a loop if we increment faster pointer by 2 or there can be the case where we need to increment by 3 or 5 or x.

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• Magento - Data is not inserted into database, but the id is autoincremented

  - by Joseph

  I am working on a new payment module for Magento and have come across an issue that I cannot explain. The following code that runs after the credit card is verified: $table_prefix = Mage::getConfig()->getTablePrefix(); $tableName = $table_prefix.'authorizecim_magento_id_link'; $resource = Mage::getSingleton('core/resource'); $writeconnection = $resource->getConnection('core_write'); $acPI = $this->_an_customerProfileId; $acAI = $this->_an_customerAddressId; $acPPI = $this->_an_customerPaymentProfileId; $sql = "insert into {$tableName} values ('', '$customerId', '$acPI', '$acPI', '3')"; $writeconnection->query($sql); $sql = "insert into {$tableName} (magCID, anCID, anOID, anObjectType) values ('$customerId', '$acPI', '$acAI', '2')"; $writeconnection->query($sql); $sql = "insert into {$tableName} (magCID, anCID, anOID, anObjectType) values ('$customerId', '$acPI', '$acPPI', '1')"; $writeconnection->query($sql); I have verified using Firebug and FirePHP that the SQL queries are syntactically correct and no errors are returned. The odd thing here is that I have checked the database, and the autoincrement value is incremented on every run of the code. However, no rows are inserted in the database. I have verified this by adding a die(); statement directly after the first write. Any ideas why this would be occuring? The relative portion of the config.xml is this: <config> <global> <models> <authorizecim> <class>CPAP_AuthorizeCim_Model</class> </authorizecim> <authorizecim_mysql4> <class>CPAP_AuthorizeCim_Model_Mysql4</class> <entities> <anlink> <table>authorizecim_magento_id_link</table> </anlink> </entities> <entities> <antypes> <table>authorizecim_magento_types</table> </antypes> </entities> </authorizecim_mysql4> </models> <resources> <authorizecim_setup> <setup> <module>CPAP_AuthorizeCim</module> <class>CPAP_AuthorizeCim_Model_Resource_Mysql4_Setup</class> </setup> <connection> <use>core_setup</use> </connection> </authorizecim_setup> <authorizecim_write> <connection> <use>core_write</use> </connection> </authorizecim_write> <authorizecim_read> <connection> <use>core_read</use> </connection> </authorizecim_read> </resources> </global> </config>

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• Altering ManagedObjects In NSArray

  - by Garry

  I have an entity called 'Job' with two boolean attributes named 'completed' and 'logged'. I am trying to retrieve all completed jobs that have not been logged at app start-up and change them to logged. I'm able to get all the completed but unlogged jobs with this fetchRequest: NSPredicate *predicate = [NSPredicate predicateWithFormat:@"(completed == %@ && logged == %@)", [NSNumber numberWithBool:YES], [NSNumber numberWithBool:NO]]; I'm then assigning this predicate to a fetchRequest and calling the [managedObjectContext executeFetchRequest:fetchRequest] method to get an array of all Job entities that meet this criteria. This seems to work fine and is returning the correct number of jobs. What I've been trying to do is loop through the NSArray returned, set the logged attribute to YES and then save. This seems to complete and doesn't return any errors but the changes are not persisted when the application quits. Where am I going wrong? [fetchRequest setPredicate:predicate]; NSError error; NSArray jobsToLog = [managedObjectContext executeFetchRequest:fetchRequest error:&error]; if ([jobsToLog count] > 0) { for (int i = 0; i < [jobsToLog count] - 1; i++) { [[jobsToLog objectAtIndex:i] setLogged:[NSNumber numberWithBool:YES]]; // Commit the changes made to disk error = nil; if (![managedObjectContext save:&error]) { // An error occurred } } } Thanks in anticipation,

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• Does any SQL frontend display sub-datasheets?

  - by Jeremy Rudd

  I'm looking for an SQL client app that can display subdatasheets like the following: Do you know of any?

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• Re-load Android activity data

  - by rhinds

  Hi, I am writing an Android app, part of which will be a survey involving multiple pages of checkbox question and answers. I have created an activity to display the question and options (from the DB) and what I want to do now is when i press the "Next" button it should just reload the current activity with the next question set from the database. (the activity starts with survey.getNextQuestion() - so its just a case of refreshing the activity so it updates) Im sure this is a simple thing to do -any ideas? Thanks

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• How to parse json data in Python?

  - by backcross

  Please help me to parse this json in python. { "IT" : [ { "firstName" : "ajay", "lastName" : "stha", "age" : 24 }, { "firstName" : "Michiel", "lastName" : "Og", "age" : 35 } ], "sales" : [ { "firstName" : "Guru", "lastName" : "red", "age" : 27 }, { "firstName" : "Jim", "lastName" : "Galley", "age" : 34 } ] } How to parse this json in Python?Please help me

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• When does it make sense to use a map?

  - by kiwicptn

  I am trying to round up cases when it makes sense to use a map (set of key-value entries). So far I have two categories (see below). Assuming more exist, what are they? Please limit each answer to one unique category and put up an example. Property values (like a bean) age -> 30 sex -> male loc -> calgary Presence, with O(1) performance peter -> 1 john -> 1 paul -> 1

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• Emails, a different 'reply to' address then sender address.

  - by dcrodjer

  I have a contact form on a website (a general form: name, email, subject, message) in which mails are sent using google apps smtp to the admins. Currently if an administrator wants to reply to the mail directly selecting the reply option, the person's reply's To field will be filled by the sender's address automatically. What I wan't to ask is, Is there any standardized way to pass on some additional info with the mail which would define any reply to the mail should go to this address instead of the sender's? It does seems that there is a little chance for this option as it may lead to some problems due to spammers (They may define a custom reply field in their mail and a general user might not look where they are replying). So as an alternative what I thought is to find a way to create a filter with sender's account which figures out the reply email address from the format and forwards the mail (Doesn't seems like a good solution and I have no idea how to achieve this). I have tagged django, though this is not directly related with this, as I will finally implement this through django.

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• how to change the data format in the objective-c

  - by uttam

  after selecting the date from the date picker, i am getting the date in the format in view like yy/mm/dd . i want to the date format in my view like mm/dd/yy. how can i do this.

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• Is there a module that implements an efficient array type in Erlang?

  - by dsmith

  I have been looking for an array type with the following characteristics in Erlang. append(vector(), term()) O(1) nth(Idx, vector()) O(1) set(Idx, vector(), term()) O(1) insert(Idx, vector(), term()) O(N) remove(Idx, vector()) O(N) I normally use a tuple for this purpose, but the performance characteristics are not what I would want for large N. My testing shows the following performance characteristics... erlang:append_element/2 O(N). erlang:setelement/3 O(N). I have started on a module based on the clojure.lang.PersistentVector implementation, but if it's already been done I won't reinvent the wheel.

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• How to Import data from Excel 2010 to SQL table

  - by user2950101

  I am using this , Insert into smst(id,mobile,day,month,year,time,model,imie1,imie2,FullMessage)select * FROM OPENROWSET('Microsoft.Ace.OLEDB.14.0','Excel 14.0;Database=L:\SMS.xlsx;HDR=YES', 'SELECT id,mobile,day,month,year,time,model,imie1,imie2,FullMessage FROM [Sheet2]') Could you please help and find the error? sql error : 1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '('Microsoft.Ace.OLEDB.14.0','Excel 14.0;Database=L:\SMS.xlsx;HDR=YES', 'SELECT i' at line 1 i am using excel 2010.

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• Big-O for calculating all routes from GPS data

  - by HH

  A non-critical GPS module use lists because it needs to be modifiable, new routes added, new distances calculated, continuos comparisons. Well so I thought but my team member wrote something I am very hard to get into. His pseudo code int k =0; a[][] <- create mapModuleNearbyDotList -array //CPU O(n) for(j = 1 to n) // O(nlog(m)) for(i =1 to n) for(k = 1 to n) if(dot is nearby) adj[i][j]=min(adj[i][j], adj[i][k] + adj[k][j]); His ideas transformations of lists to tables His worst case time complexity is O(n^3), where n is number of elements in his so-called table. Exception to the last point with Finite structure: O(mlog(n)) where n is number of vertices and m is the amount of neighbour vertices. Questions about his ideas why to waste resources to transform constantly-modified lists to table? Fast? only point where I to some extent agree but cannot understand the same upper limits n for each for-loops -- perhaps he supposed it circular why does the code take O(mlog(n)) to proceed in time as finite structure? The term finite may be wrong, explicit?

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• displaying data from database in to text box

  - by srinayak

  I have 2 JSP pages as below: projectcategory.jsp <% Connection con = DbConnect.connect(); Statement s = con.createStatement(); ResultSet rs = s.executeQuery("select * from projectcategory"); %> <DIV class="TabbedPanelsContent" align="center"> <TABLE border="1"> <TR> <TH>CATEGORY ID</TH> <TH>CATEGORY NAME</TH> <TH>Edit/Update</TH> </TR> <% while (rs.next()) { %> <%String p=rs.getString(1);%> <TR> <TD><%=rs.getString(1)%></TD> <TD><%=rs.getString(2)%></TD> <TD> <FORM action="EditPcat.jsp?pcatid=p"><INPUT type="submit" value='edit/update'></INPUT> </FORM> </TD> </TR> <% } %> </TABLE> </DIV> another is Editpcat.jsp: </head> <body> <%String s=request.getParameter("p"); %> <form action="ProjCatServlet" method="post"> <div align="right"><a href="projectcategory.jsp">view</a></div> <fieldset> <legend>Edit category</legend> <table cellspacing="2" cellpadding="2" border="0"> <tr> <td align="left">Category Id</td> <td><input type="text" name="pcatid" value="<%=s%>" ></td> </tr> <tr> <td align="right">Category Name</td> <td><input type="text" name="pcatname"></td> </tr> <tr> <td><input type="submit" value="submit"></td> </tr> </table> <input type="hidden" name="FUNCTION_ID" value="UPDATE"> </fieldset> </form> How to display value from one JSP page which we get from database in to text box of another JSP?

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• Subset and lagging list data structure R

  - by user1234440

  I have a list that is indexed like the following: >list.stuff [[1]] [[1]]$vector ... [[1]]$matrix .... [[1]]$vector [[2]] null [[3]] [[3]]$vector ... [[3]]$matrix .... [[3]]$vector . . . Each segment in the list is indexed according to another vector of indexes: >index.list 1, 3, 5, 10, 15 In list.stuff, only at each of the indexes 1,3,5,10,15 will there be 2 vectors and one matrix; everything else will be null like [[2]]. What I want to do is to lag like the lag.xts function so that whatever is stored in [[1]] will be pushed to [[3]] and the last one drops off. This also requires subsetting the list, if its possible. I was wondering if there exists some functions that handle list manipulation. My thinking is that for xts, a time series can be extracted based on an index you supply: xts.object[index,] #returns the rows 1,3,5,10,15 From here I can lag it with: lag.xts(xts.object[index,]) Any help would be appreciated thanks: EDIT: Here is a reproducible example: list.stuff<-list() vec<-c(1,2,3,4,5,6,7,8,9) vec2<-c(1,2,3,4,5,6,7,8,9) mat<-matrix(c(1,2,3,4,5,6,7,8),4,2) list.vec.mat<-list(vec=vec,mat=mat,vec2=vec2) ind<-c(2,4,6,8,10) for(i in ind){ list.stuff[[i]]<-list.vec.mat }

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• Entity binding WPF

  - by morphsd

  I'm doing some auction sale app and I'm new to Entity Framework. I used quickest way to create and bind Wpf control and entity(wizard and drag and drop) so VS2010 generated a lot of code for me. Now I have a problem... WPF control isn't syched to my entity. I read some articles and I understood that I have to use IObservable. Is there an easy way to do that without writing that generated code manually?

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• DataTriggered animation is triggered only in the first time

  - by Pavel

  I just wanted to create very simple example of DataTriggers and animation. Two checkboxes and Rectangle. Checking the first cb makes the rectangle fade away. (CodeBehind var is true) Checking the second cb makes the rectangle come back. (var is false) App is loading - the rectangle is showing (true) Firs cb is checked by default. I'm checking second cb - rect is dissapearing. It's OK. But when I then check the first cb rect isn't showing up. But checking the second cb still makes rect show up and fade away. here's my xaml and code behind: <StackPanel> <RadioButton IsChecked="True" Checked="RadioButton_Checked"></RadioButton> <RadioButton Checked="RadioButton_Checked_1"></RadioButton> <Rectangle Name="r1" Width="100" Height="300" Fill="Green"> <Rectangle.Style> <Style TargetType="Rectangle"> <Style.Triggers> <DataTrigger Binding="{Binding Active}" Value="True"> <DataTrigger.EnterActions> <BeginStoryboard> <Storyboard> <DoubleAnimation Storyboard.TargetProperty="Opacity" From="0" To="1" Duration="0:0:1" /> </Storyboard> </BeginStoryboard> </DataTrigger.EnterActions> </DataTrigger> <DataTrigger Binding="{Binding Active}" Value="False"> <DataTrigger.EnterActions> <BeginStoryboard> <Storyboard> <DoubleAnimation Storyboard.TargetProperty="Opacity" From="1" To="0" Duration="0:0:1" /> </Storyboard> </BeginStoryboard> </DataTrigger.EnterActions> </DataTrigger> </Style.Triggers> </Style> </Rectangle.Style> </Rectangle> </StackPanel> public bool Active { get { return (bool) GetValue(ActiveProperty); } set { SetValue(ActiveProperty, value); } } public static readonly DependencyProperty ActiveProperty = DependencyProperty.Register("Active", typeof(bool), typeof(MainWindow), new UIPropertyMetadata(false)); private void RadioButton_Checked(object sender, RoutedEventArgs e) { Active = true; } private void RadioButton_Checked_1(object sender, RoutedEventArgs e) { Active = false; }

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• IO.Directory.Exists always returns true

  - by roygbiv

  I am executing a IO.Directory.Exists on a network share from an ASP.NET application running under a specific Application Pool with a specific user account. The call always returns true. I have tried several variations: \\server\share$\directory \\192.168.0.1\share$\directory H:\directory I have checked that directory and share permissions are available to the account. The path does have spaces in it \\server\share$\directory\name name\test test, which should make no difference, however I have read otherwise. I will continue to check permissions, as it does work from my local machine (with the built in VS web-server and I am an administrator on the network), but when deployed to the IIS 6.0 virtual directory, and run under the Application Pool, it does not work.

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• algorithm - How to sort a 0/1 array with 2n/3 comparisons?

  - by Jackson Tale

  In Algorithm Design Manual, there is such an excise 4-26 Consider the problem of sorting a sequence of n 0’s and 1’s using comparisons. For each comparison of two values x and y, the algorithm learns which of x < y, x = y, or x y holds. (a) Give an algorithm to sort in n - 1 comparisons in the worst case. Show that your algorithm is optimal. (b) Give an algorithm to sort in 2n/3 comparisons in the average case (assuming each of the n inputs is 0 or 1 with equal probability). Show that your algorithm is optimal. For (a), I think it is fairly easy. I can choose a[n-1] as pivot, then do something like in quicksort partition, scan 0 to n - 2, find the middle point where left side is all 0 and right side is all 1, this take n - 1 comparisons. But for (b), I can't get a clue. It says "each of the n inputs is 0 or 1 with equal probability", so I guess I can assume the numbers of 0 and 1 equal? But how can I get a result which is related to 1/3? divide the whole array into 3 groups? Thanks

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• HTML forms and passing data back

  - by coLOLtip

  My html form is spreading over several pages (steps), and I want to let the use to take step back in case they would like to change something they filled in. So, I don't want to make users re-type all the information they already have typed once. Thus, how would I make it so that all the information would go back, to speak so? (I use PHP on server-side.)

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• C# Retrieving Data From XML File

  - by Christopher MacKinnon

  I seem to be having a problem with retrieving XML values with C#, which I know it is due to my very limited knowledge of C# and .XML. I was given the following XML file <PowerBuilderRunTimes> <PowerBuilderRunTime> <Version>12</Version> <Files> <File>EasySoap110.dll</File> <File>exPat110.dll</File> <File>pbacc110.dll</File> </File> </PowerBuilderRunTime> </PowerBuilderRunTimes> I am to process the XML file and make sure that each of the files in the exist in the folder (that's the easy part). It's the processing of the XML file that I have having a hard time with. Here is what I have done thus far: var runtimeXml = File.ReadAllText(string.Format("{0}\\{1}", configPath, Resource.PBRuntimes)); var doc = XDocument.Parse(runtimeXml); var topElement = doc.Element("PowerBuilderRunTimes"); var elements = topElement.Elements("PowerBuilderRunTime"); foreach (XElement section in elements) { //pbVersion is grabbed earlier. It is the version of PowerBuilder if( section.Element("Version").Value.Equals(string.Format("{0}", pbVersion ) ) ) { var files = section.Elements("Files"); var fileList = new List<string>(); foreach (XElement area in files) { fileList.Add(area.Element("File").Value); } } } My issue is that the String List is only ever populated with one value, "EasySoap110.dll", and everything else is ignored. Can someone please help me, as I am at a loss.

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• how to send some data to the Thread module on python and google-map-engine

  - by zjm1126

  from google.appengine.ext import db class Log(db.Model): content = db.StringProperty(multiline=True) class MyThread(threading.Thread): def run(self,request): #logs_query = Log.all().order('-date') #logs = logs_query.fetch(3) log=Log() log.content=request.POST.get('content',None) log.put() def Log(request): thr = MyThread() thr.start(request) return HttpResponse('') error is : Exception in thread Thread-1: Traceback (most recent call last): File "D:\Python25\lib\threading.py", line 486, in __bootstrap_inner self.run() File "D:\zjm_code\helloworld\views.py", line 33, in run log.content=request.POST.get('content',None) NameError: global name 'request' is not defined

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• ServerVariables and POST Data

  - by tyndall

  I've got a piece of tracking code which is capturing REMOTE_HOST, SERVER, REQUEST_METHOD, SCRIPT_NAME and QUERY_STRING. It grabs these from ServerVariables and sticks them in a database by user and IP. What is the best way to pick up the exact contents of what was posted back to a URL in ASP.NET? Is there an HTTP_POST? I'd rather not grab something and then have to parse it.

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