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• Get a string sequence from a node-set in xpath 1.0

  - by Miguel

  I'm using xpath 1.0 to parse an html file and I want to get a string sequence from a node-set. First I select a node-set (eg: //div) and then I want the string-value of each node of the set. I've tried with string(//div) but it only returns the string-value of the first node in the set. Example <foo> <div> bbbb<p>aaa</p> </div> <div> cccc<p>aaa</p> </div> </foo> I expect a result like ('bbbbaaa', 'ccccaaa') but I only get 'bbbaaa'

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• Is this a valid benefit of using embedded SQL over stored procedures?

  - by George

  Here's an argument for SPs that I haven't heard. Flamers, be gentle with the down tick, Since there is overhead associated with each trip to the database server, I would suggest that a POSSIBLE reason for placing your SQL in SPs over embedded code is that you are more insulated to change without taking a performance hit. For example. Let's say you need to perform Query A that returns a scalar integer. Then, later, the requirements change and you decide that it the results of the scalar is x that then, and only then, you need to perform another query. If you performed the first query in a SP, you could easily check the result of the first query and conditionally execute the 2nd SQL in the same SP. How would you do this efficiently in embedded SQL w/o perform a separate query or an unnecessary query? Here's an example: --This SP may return 1 or two queries. SELECT @CustCount = COUNT(*) FROM CUSTOMER IF @CustCount 10 SELECT * FROM PRODUCT Can this/what is the best way to do this in embedded SQL?

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• HOw to Extract image pixels and perform computation on it

  - by gavishna

  What i want to do is extract the pixels into array A(i,j).Let A(i,j) represent the pixel in the ith row & jth colm of the image. Let B(i,j) be the transformed array containing bits such that B(i,j) = 1 if (A(i,j)/2^t) mod 2 =1, where t=0,1,2,3,4,5,6,7 = 0 otherwise Then the array B(i,j) will be mutliplied by another array say C(i,j) representing another image. Then i want to plot the result of B*C as an image. How do i take in the pixels for the above conditions for both gray and RGB color format.Also how do i solve the above problem.Any helo will be usefull because i am not an expert in image processing.

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• search for a string , and add if it matches

  - by Sharat Chandra

  I have a file that has 2 columns as given below.... 101 6 102 23 103 45 109 36 101 42 108 21 102 24 109 67 and so on...... I want to write a script that adds the values from 2nd column if their corresponding first column matches for example add all 2nd column values if it's 1st column is 101 add all 2nd column values if it's 1st colummn is 102 add all 2nd column values if it's 1st colummn is 103 and so on ... i wrote my script like this , but i'm not getting the correct result awk '{print $1}' data.txt > col1.txt while read line do awk ' if [$1 == $line] sum+=$2; END {print "Sum for time stamp", $line"=", sum}; sum=0' data.txt done < col1.txt

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• How to solve this problem in JasperReport?

  - by Kumar

  Hi friends, I want to print a table in pdf document. I need to use two javabean datasource to populate the data in the table. So i used two subreport parallely to map the data.The problem what i am facing is i could not able to organize the second subreport content corresponding to first subreport.That is , if any field's width is big in the first subreport then content in the second report will not align properly corresponding to the first subreport.The below sample will give a good idea about the problem My expected Output SubReport1 SubReport2 S.No Value S.No Value 1 value from first 1 value from second bean java bean value bean 2 value from first bean 2 value from second bean Result which i am getting SubReport1 SubReport2 S.No Value S.No Value 1 value from first 1 value from second bean java bean value 2 value from second bean bean 2 value from first bean Please kindly help me to sort out this problem.

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• node_load in drupal gets incorrect node when you are NOT logged in

  - by Alaa

  Hi All, i have a module and i am using node_load(array('nid' = arg(1))); now the problem is that this function keep getting its data for node_load from DB cache. how can i force this function to not use DB cache or static value? Example my link is http://mydomain.com/node/344983 now: $node=node_load(array('nid'=arg(1)),null,true); echo $node-nid; output: 435632 which is a randomly node id (available in the database) and everytime i ctrl+F5 my browser, i get new nid!! Note: if i am logged in, it gives the result correctly, but this problem happens only when i am browsing the website as an anonymous user i really appreciate any idea!! Thanks

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• Difference between debug and release.

  - by atch

  Why when I'm debugging in debug mode everything in code below works as suppose to but when I switch to release I'm getting strange result? void say_hello(int argc, char* argv[])//In release mode argc has different values from 124353625 to 36369852 <include iostream> { std::cout << "In say_hello()\n"; } int main(int argc, char* argv[]) { say_hello(3,argv);//when instead of literal I enter "argc" everything is ok. return 0; } Thanks for help.

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• Using a singleton database class in functions and multiple scripts(PHP) - best use methods

  - by dscher

  I have a singleton db connection which I get with: $dbConnect = myDatabase::getInstance(); which is easy enough. My question is what is the least rhetorical and legitimate way of using this connection in functions and classes? It seems silly to have to declare the variable global, pass it into every single function, and/or recreate this variable within every function. Is there another answer for this? Obviously I'm a noob and I can work my way around this problem 10 different ways, none of which is really attractive to me. It would be a lot easier if I could have that $dbConnect variable accessible in any function without needing to declare it global or pass it in. I do know I can add the variable to the $_SERVER array...is there something wrong with doing this? It seems somewhat inappropriate to me. Another quick question: Is it bad practice to do this: $result = myDatabase::getInstance()-query($query); from directly within a function?

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• Excel vba: error hiding calculated field in Pivot table

  - by Patrick Honorez

  I have written several Subs to show/hide fields in a PivotTable. Now I am trying to do the same with a calculated field, but I get an error when hiding it. I took my code from the recorder and the recorder's code also halts on the last line. I googled the error message, without serious result. Sub PrRemove() 'remove PR Dim pt As PivotTable Set pt = ActiveSheet.PivotTables("MyPivot") pt.PivotFields("MyField").Orientation = xlHidden '<- here is the error End Sub The same code works fine if MyField is a normal field (not a calculated one). I am using Excel 2007 with SP2. Any clue ?

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• determine which value produced a hit in SOLR multivalued field type

  - by harschware

  If I have a multiValued field type of text, and I put values [cat,dog,green,blue] in it. Is there a way to tell when I execute a query against that field for dog, that it was in the 1st element position for that multiValued field? Assumption: client does not have any pre-knowledge of what the field type of the field being queried is. (i.e. Solr must provide the answer and the client can't post process the return doc to figure it out because it would not know how SOLR matched the query to the result). Disclosure: I posted to solr-user list and am getting no traction so I post here now.

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• Injecting relationships in DBIx::Class

  - by Carl

  I have a handful of DBIx::Class::Core objects that model various database tables. For some of those models (those that have a 'queue' column), I have another class inject subs (basically, to 'move' the model object along it's queue states). I'd like to also have that class inject has_many relationships ala class($name)->has_many('queue_history','MySchema::Result::QueueHistory', { 'foreign.record_id'=>'self.id' }, { where => { type => $name }} ); but I can't seem to get the relationships to register properly (keep getting "No Such Relationship" errors - however, when calling the relationship method on the sources provides back the relationship). Any clues as to what's wrong?

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• DataReader or DataSet when pulling multiple recordsets in ASP.NET

  - by Gern Blandston

  I've got an ASP.NET page that has a bunch of controls that need to be populated (e.g. dropdown lists). I'd like to make a single trip to the db and bring back multiple recordsets instead of making a round-trip for each control. I could bring back multiple tables in a DataSet, or I could bring back a DataReader and use '.NextResult' to put each result set into a custom business class. Will I likely see a big enough performance advantage using the DataReader approach, or should I just use the DataSet approach? Any examples of how you usually handle this would be appreciated.

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• How to create Empty Label without any entries in it using Google Mail API?

  - by Pari

  Hi, I want to create an empty label in Google apps using Google Mail API. Using Below code: MailItemService mailItemService = new MailItemService(domain, "Sample Migration Application"); mailItemService.setUserCredentials(userEmail, password); MailItemEntry[] entries = new MailItemEntry[1]; entries[0] = new MailItemEntry(); entries[0].Labels.Add(new LabelElement("Empty Label")); entries[0].BatchData = new GDataBatchEntryData(); entries[0].BatchData.Id = "0"; MailItemFeed feed = mailItemService.Batch(domain, username, entries); Above code is not giving any error but not creating label also. If i assign some more values to entries it work nicely but it result in cretion of mail inside Label (But i want empty label) Can anyone help me out here? Thanx

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• using KVO to update an NSTableView filtered by an NSPredicate

  - by KingRufus

  My UI is not updating when I expect it to. The application displays "projects" using a view similar to iTunes -- a source list on the left lets you filter a list (NSTableView) on the right. My filters update properly when they are examining any simple field (like name, a string), but not for arrays (like tags). I'm removing a tag from one of my objects (from an NSMutableArray field called "tags") and I expect it to disappear from the list because it no longer matches the predicate that is bound to my table's NSArrayController. ProjectBrowser.mm: self.filter = NSPredicate* srcPredicate = [NSPredicate predicateWithFormat:@"%@ IN %K", selectedTag, @"tags"]; Project.mm: [self willChangeValueForKey:@"tags"]; [tags removeAllObjects]; [self didChangeValueForKey:@"tags"]; I've also tried this, but the result is the same: [[self mutableArrayValueForKey:@"tags"] removeAllObjects]; Interface Builder setup: a ProjectBrowser object is the XIB's File Owner an NSArrayController (Project Controller) has its Content Array bound to "File's Owner".projects Project Controller's filter predicate is bound to "File's Owner".filter NSTableView's column is bound to "Project Controller".name

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• mysql boolean joins

  - by user280381

  I want to use a JOIN to return a boolean result. Here's an example of the data... t1 id | data | 1 | abcd | 2 | 2425 | 3 | xyz | t2 id | data | t1_id | 1 | 75 | 2 | 2 | 79 | 2 | 3 | 45 | 3 | So with these two tables I want to select all the data from t1, and also whether a given variable appears in t2.data for each id. So say the variable is 79, the results should be id | data | t2_boolean 1 | abcd | 0 2 | abcd | 1 3 | xyz | 0 So I'm thinking some sort of join is needed, but without a WHERE clause. I've been banging my head about this one. Is it possible? I really need it inside the same statement as I want to sort results by the boolean field. As the boolean needs to be a field, can I put a join inside of a field? Thanks...

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• Build SUM based daily record

  - by ximarin

  I have a problem building an aggregate function. Here's my problem: I have a table like this id action day isSum difference 1 ping 2012-01-01 1 500 (this is the sum of the differences from last year) 2 ping 2012-01-01 0 -2 3 ping 2012-01-02 0 1 4 ping 2012-01-03 0 -4 5 ping 2012-01-04 0 -2 6 ping 2012-01-05 0 3 7 ping 2012-01-06 0 2 8 ping 2012-01-01 1 0 (this is the sum of the differences from last year, now for pong) 9 pong 2012-01-01 0 -5 10 pong 2012-01-02 0 2 11 pong 2012-01-03 0 -2 12 pong 2012-01-04 0 -8 13 pong 2012-01-05 0 3 14 pong 2012-01-06 0 4 I now need to select the action, day and the summarized difference since 01-01 for every day, so that my result looks like this action day total ping 2012-01-01 498 ping 2012-01-02 499 ping 2012-01-03 495 ping 2012-01-04 493 ping 2012-01-05 496 ping 2012-01-06 498 pong 2012-01-01 - 5 pong 2012-01-02 - 3 pong 2012-01-03 - 5 pong 2012-01-04 -13 pong 2012-01-05 -10 pong 2012-01-06 - 6 How can I do this? there a are a lot of datasets (~1 million), so the query needs to be pretty cheap. I don't know how the use sum to get daily sums for daily records depending on the action-column.

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• Maven Quick-start Guide

  - by Dave

  I'm tasked with getting a development environment set up for a new program at work. The lead has chosen Eclipse as the IDE for its OSGi support and Maven as the build utility. I've struggled through getting Maven integrated with Eclipse and I'm grudgingly declaring success and moving forward. My question: is there any sort of guide to getting started with Maven? I've found boatloads of documentation, most all of it very, very detailed and simultaneously unhelpful. I downloaded a 300+ page book that goes into excruciating detail about POMs, but doesn't tell you how to initialize a project from existing source. Hopefully, this question will result in a pointer to something I missed or a collection of links for those who follow me.

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• How to get min/max of two integers in Postgres/SQL?

  - by HRJ

  How do I find the maximum (or minimum) of two integers in Postgres/SQL? One of the integers is not a column value. I will give an example scenario: I would like to subtract an integer from a column (in all rows), but the result should not be less than zero. So, to begin with, I have: UPDATE my_table SET my_column = my_column - 10; But this can make some of the values negative. What I would like (in pseudo code) is: UPDATE my_table SET my_column = MAXIMUM(my_column - 10, 0);

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• How to Format time in Yahoo PIpes to get the minutes past..??

  - by Nok Imchen

  I fetched the tweets from twitter api using yahoo pipes. Now, twitter gives the time in this format "Thu May 27 19:56:21 +0000 2010". I want to know how many minutes have past since "Thu May 27 19:56:21 +0000 2010". How, can i format "Thu May 27 19:56:21 +0000 2010" in order to get the minutes past?? in other words, i want to subract "now" and "Thu May 27 19:56:21 +0000 2010". Then convert the result into minutes. Please help me...

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• Pure functional bottom up tree algorithm

  - by Axel Gneiting

  Say I wanted to write an algorithm working on an immutable tree data structure that has a list of leaves as its input. It needs to return a new tree with changes made to the old tree going upwards from those leaves. My problem is that there seems to be no way to do this purely functional without reconstructing the entire tree checking at leaves if they are in the list, because you always need to return a complete new tree as the result of an operation and you can't mutate the existing tree. Is this a basic problem in functional programming that only can be avoided by using a better suited algorithm or am I missing something?

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• php, get an end date based on start date and number of months

  - by mike

  Hi! I need to calculate an end date based on todays date and a number of months. For example, todays date 04/01/2010 and the number of months is 6. Are there any functions I can use to do some math that would return "10/01/2010"? Also, I think it's important to note that I am storing the result in MySQL as a "DATETIME" so I guess I would have to do something with the time as well... ??? Thanks!

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• Suddenly Facebook API stopped working on Windows Phone

  - by Juan Diego

  My code hasn't changed, it was working yesterday or so. I can oauth, get the token but then doing the following: WebClient wc = new WebClient(); wc.DownloadStringCompleted += result; wc.DownloadStringAsync(new Uri("https://graph.facebook.com/me&access_token=xxxTOKENxxx", UriKind.Absolute)); Returns a NotFound WebClient exception: "The remote server returned an error: NotFound." Strange thing is that when pasting that same url on Chrome or IE it does work(PC). Tried on Emulator and on 2 different real WP devices, even pasting the same url on the WP browser. Feels like facebook is rejecting Windows Phone for some reason? Anyone has an idea of what might be happening?

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• ASP.NET MVC: trying out a script injection hangs Visual Studio 2010 completely?

  - by Mark Redman

  Wondering if anyone has an idea of whats going on: I am new to ASP.NET MVC and am trying out a few things with jquery/ajax. The basic scenario is a dropdownlist with an add button next to it. Clicking the add button launches a jquery ui dialog with a textbox form, entering a value saves the item to the database and refreshes the drop-downlist. The dropdownlist is re-populated using a JSON result. This all works ok. I thought I would try a script injetion attack, ie add the text: alert("oh dear") to seee what would happen and to check if I need to encode anything. When I try and save this item (similar to the same process of adding a plain text entry) Visual Studio 2010 Beta 2 hangs completely. Any ideas? UPDATE: It happens when posting: "</"

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• Conditional Batch file renaming with mysql data

  - by Paul Stevens

  Hello, I wonder if anyone knows how could I rename multiple files, all of them originally named with same structure, and add some data extracted from a mysql DB according to specifics rules. For example I have 500 files named with this vars: ID NAME ADDRESS PHONE.wav = 1234567 PAULSIMON WESTDR122 9942213456.wav Now I need to rename files taking some data from the databases for each file, and append the data from a query appended to the filename. For example add the data resulting from a query Where some conditions match, and the data to build the query is taked from original file name, as ID or NAME. i other words, lets say that I want to build a query taking ID & NAME from file 1234567 PAULSIMON WESTDR123 9942213456.wav as WHERE statements to take another value as BirthDATE and add this to new filename, so final result should be: ID NAME ADDRESS PHONE BIRTHDATE.wav I will appreciate any help on this. I need this to be done on a LINUX server.

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• Ajax JQuery responses order problem....

  - by Parhs

  Hello !!! I am searching 3 hours and didnt find anything.... i have this code which is called at an onChange event of an function group_changed(obj) { $.ajaxSetup({async:false}); $.post("/medilab/personnel/groups/getGroupRightsAjax",{ 'group.id': obj.options[obj.selectedIndex].value }, function(data){ $("#div_rights").html(data); }); } This works fine but if i set async:true sometimes the result doesnt match the selection... I guess that this is happening because some requests are lost or that the responses dont come in order..... Any idea what to do to keep it asynchronous?

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