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• Using Linq to select a range of members in a list

  - by clintp

  Given a list of elements like so: int[] ia = new int[] { -4, 10, 11, 12, 13, -1, 9, 8, 7, 6, 5, 4, -2, 6, 15, 32, -5, 6, 19, 22 }; Is there an easy way in Linq to do something along the lines of "Select the elements from the -1 up to the next negative number (or the list exhausts)"? A successful result for -1 would be (-1, 9, 8, 7, 6, 5, 4). Using -2 would give the result (-2, 6, 15, 32). Not a homework problem. I'm just looking at an implementation using a bool, a for loop, and an if wondering if there's a cleaner way to do it.

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• Efficiently compute the row sums of a 3d array in R

  - by Gavin Simpson

  Consider the array a: > a <- array(c(1:9, 1:9), c(3,3,2)) > a , , 1 [,1] [,2] [,3] [1,] 1 4 7 [2,] 2 5 8 [3,] 3 6 9 , , 2 [,1] [,2] [,3] [1,] 1 4 7 [2,] 2 5 8 [3,] 3 6 9 How do we efficiently compute the row sums of the matrices indexed by the third dimension, such that the result is: [,1] [,2] [1,] 12 12 [2,] 15 15 [3,] 18 18 ?? The column sums are easy via the 'dims' argument of colSums(): > colSums(a, dims = 1) but I cannot find a way to use rowSums() on the array to achieve the desired result, as it has a different interpretation of 'dims' to that of colSums(). It is simple to compute the desired row sums using: > apply(a, 3, rowSums) [,1] [,2] [1,] 12 12 [2,] 15 15 [3,] 18 18 but that is just hiding the loop. Are there other efficient, truly vectorised, ways of computing the required row sums?

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• Sum in array with match value

  - by user325504

  Dear all, I would like to do a simple sum per salesid in php - mysql after cross calculation between date (2 table) to get the real time commission, all the value already come out correctly but I got problem with final sum per sales id. salesid-commission aa0001 - 1000 bb0001 - 500 aa0001 - 200 bb0001 - 50 I already try with few sample in this web but still cannot meet the correct result. I cannot do the sum in mysql because of some reason (need calculation with other table) the result will be: aa0001 - 1200 bb0001 - 550 I aprreciated for any help to complated the test. Thank you so much.

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• JDBC ResultSet.getString Before/After Start/End of ResultSet Exception

  - by Geowil

  I have done a lot of searching about this topic through Google but I have yet to find someone using getString() in the way that I am using it so I have not been able to fix this issue in the normal ways that are suggested. What I am trying to do is to obtain all of the information from the database and then use it to populate a table model within the program. I do so by obtaining the data with getString and place it into a String[] object: try { while (rSet.next()) { String row[] = {rSet.getString("DonorName"),rSet.getString("DonorCharity"),((String)rSet.getString("DonationAmount"))}; model.addRow(row); } } However I am always getting a dialog error message stating those error messages in the title: Exception: Before start of result set Exception: After end of result set The data is still added and everything works correctly but it is just annoying to have to dismiss those message windows. Does anyone have some suggestions?

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• Saving a movie generated with Jython/JES on local disk

  - by Golgauth

  I made an autogenerated movie clip using JES (Jython Environment for Students). I can play it without any problem using playMovie(), but I can't figure out how to have it saved physically on disk. The full script is located here. ... movie = synthesizeFrameAndCreateMovie("D:\\FOLDER") print movie writeQuicktime(movie,"D:\\FOLDER\\movie.mov", 30) [LINE 35] #playMovie(movie) I get this error when calling the function writeQuicktime(): >>> ======= Loading Progam ======= Movie, frames: 60 The error was: Index: 0, Size: 0 I wasn't able to do what you wanted. The error java.lang.IndexOutOfBoundsException has occured Please check line 35 Note : I also tried the function writeAVI(), with the exact same result. This error sounds like a java bug in Jython/JES library. I am running JES under Windows 7 and have all the common Quicktime and AVI codex installed as well as the QTjava library in my jre... Any brilliant idea ? EDIT : Also tried the Linux version with same result for both QuickTime and AVI...

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• What wording in the C++ standard allows static_cast<non-void-type*>(malloc(N)); to work?

  - by ben

  As far as I understand the wording in 5.2.9 Static cast, the only time the result of a void*-to-object-pointer conversion is allowed is when the void* was a result of the inverse conversion in the first place. Throughout the standard there is a bunch of references to the representation of a pointer, and the representation of a void pointer being the same as that of a char pointer, and so on, but it never seems to explicitly say that casting an arbitrary void pointer yields a pointer to the same location in memory, with a different type, much like type-punning is undefined where not punning back to an object's actual type. So while malloc clearly returns the address of suitable memory and so on, there does not seem to be any way to actually make use of it, portably, as far as I have seen.

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• Why function callback of Connection is not handled with Yahoo UI ?

  - by quilovnic

  I use Yahoo UI with Grails (so grailsui) and I try to upload a file with Ajax and get a JSON response from the server : The response is correctly returned by my controller but a popup is displayed to save the file but it's not a file it's a JSON result. My Yahoo Code is : callback = { success: function(o){alert('success');}, failure: function(o){alert('failure');} } YAHOO.util.Connect.asyncRequest('POST', '/my/url', callback); The http response is the JSON result. What's hell is wrong ? Why does I have dialog box to download the file ? Thanks a lot.

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• Can you do a struts2 action redirect using POST instead of GET?

  - by Andy Pryor

  <action name="actionA" class="com.company.Someaction"> <result name="success" type="redirect-action"> <param name="actionName">OtherActionparam> <param name="paramA">${someParams}</param> <param name="paramB">${someParams}</param> <param name="aBoatLoadOfOtherParams">${aBoatLoadOfOtherParams}</param> </result> </action> In the above action map, I am redirecting from SomeAction to OtherAction. I am having issues, because unfortunately I need to pass a large amount of data between the two actions. IE7 will only allow GET requests to be like 2k, so its blowing up when I'm just over that limit when the response calls a get request to the other action. Is it possible for me to set this redirect, to end up with a POST being called to the other action?

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• Passing variables from PHP to Javascript back to PHP using Ajax.

  - by ObjectiveJ

  I hope this makes sesne, please bare with me. So I have a PHP page that contains variables, I have some radial boxes, and on click of them, it calculates a price for the item you have clicked on. I do this by activating a js function that I have passed some variables to. Like so. PHP: <?php $result = mssql_query("SELECT * FROM Segments ORDER BY 'Squares'"); if (!$result) { echo 'query failed'; exit; } while ($row = mssql_fetch_array($result)) { ?> <span><?php echo $row["Squares"]; ?></span><input name="squares" type="radio" onclick="ajaxCases('<?php echo $row["Squares"]; ?>', '<?php echo $row["StartCaseID"]; ?>', '<?php echo $row["StartMatrixPrice"]; ?>')" value="<?php echo $row["Squares"]; ?>"<?php if ($row["Squares"] == "1") { ?> checked="checked" <?php }else{ ?> checked="" <?php } ?>/> <?php } ?> As you can see onclick it goes to a function called ajaxcases, this function looks like this. function ajaxCases(squares,start,price){ $('#step1').html('<p style="margin:100px 0px 0px 100px"><img src="images/ajax-loader-bigindic.gif" width="32" height="32" alt="" /></p>'); $('#step1').load("ajax-styles.php?squares="+squares); prevId1 = ""; document.varsForm.caseid.value=start; $('#step1price').html('<span style="margin:0px 0px 0px 30px"><img src="images/ajax-loader-price.gif" width="24" height="24" alt="" /></span>'); $('#step1price').load("ajax-step1-price.php?Squares="+Squares); return true; } This then goes to a php page called ajax-step1-price.php and I try to recall the variable Squares. However it doesn't work, I thought it was a GET however that returns undefined. In Summary: I would like to know how to pass a variable from PHP to JS then back to PHP, or if someone could just tell me where I am going wrong that would be greatly appreciated.

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• Window bounds set on window using AppleScript in OS X are being ignored

  - by Jesse

  I am trying to create a small AppleScript to create and move some Terminal windows around my screen. The problem I am running into is that in some cases, it seems that OS X is ignoring the bounds I am setting. Using the AppleScript Editor: tell application "Terminal" to set the bounds of the first window to {0, 50, 600, 700} tell application "Terminal" to get the bounds of the first window Shows the following in the Event Log: tell application "Terminal" activate set bounds of window 1 to {0, 50, 600, 700} get bounds of window 1 --> {0, 22, 600, 672} end tell Result: {0, 22, 600, 672} Visually inspecting the window that is created when the script runs shows that Result bounds are the ones being used by the window. Any ideas?

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• Style of if: to nest or not to nest

  - by Marco

  A colleague of mine and me had a discussion about the following best-practice issue. Most functions/methods start with some parameter checking. I advocate the following style, which avoids nesting. if (parameter one is ugly) return ERROR; if (parameter two is nonsense || it is raining) return ERROR; // do the useful stuff return result; He, who comes from a more functional/logic programming background, prefers the following, because it reduces the number of exit points from the function. if (parameter one is ok) { if (parameter two is ok && the sun is shining) { // do the useful stuff return result } } return ERROR; Which one would you prefer and why?

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• Spring 3 MVC : problem with form:errors and bindingresult

  - by Maxime ARNSTAMM

  Hi, I want to validate my inputs but i can't make it work : nothing appear on the page. My project is in java 5, so no JSR303 (@Valid). My only solution, if i'm not mistaken, is to use BindingResult. My controller : @Controller public class MyController { @RequestMapping(method = RequestMethod.POST, value = "myPage.html") public void myHandler(MyForm myForm, BindingResult result, Model model) { result.reject("field1", "error message 1"); } } My jsp : <form:form commandName="myForm" method="post"> <label>Field 1 : </label> <form:input path="field1" /> <form:errors path="field1" /> <input type="submit" value="Post" /> </form:form> What am i missing ? Thanks !

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• Write PEM encoded certificate in file - java

  - by user1349407

  Good day. I recently create X.509 certificate by using bouncy castle API. I need to save the certificate result rather than display the result. I tried to use FileOutputStream, but it does not work. regards the result is like follows -----BEGIN CERTIFICATE----- MIICeTCCAeKgAwIBAgIGATs8OWsXMA0GCSqGSIb3DQEBCwUAMBsxGTAXBgNVBAMT... -----END CERTIFICATE----- The code is belows import java.io.FileOutputStream; //example of a basic CA public class PKCS10CertCreateExample { public static X509Certificate[] buildChain() throws Exception { //create the certification request KeyPair pair = chapter7.Utils.generateRSAKeyPair(); PKCS10CertificationRequest request = PKCS10ExtensionExample.generateRequest(pair); //create a root certificate KeyPair rootPair=chapter7.Utils.generateRSAKeyPair(); X509Certificate rootCert = X509V1CreateExample.generateV1Certificate (rootPair); //validate the certification request if(!request.verify("BC")) { System.out.println("request failed to verify!"); System.exit(1); } //create the certificate using the information in the request X509V3CertificateGenerator certGen = new X509V3CertificateGenerator(); certGen.setSerialNumber(BigInteger.valueOf(System.currentTimeMillis())); certGen.setIssuerDN(rootCert.getSubjectX500Principal()); certGen.setNotBefore(new Date(System.currentTimeMillis())); certGen.setNotAfter(new Date(System.currentTimeMillis()+50000)); certGen.setSubjectDN(request.getCertificationRequestInfo().getSubject()); certGen.setPublicKey(request.getPublicKey("BC")); certGen.setSignatureAlgorithm("SHA256WithRSAEncryption"); certGen.addExtension(X509Extensions.AuthorityKeyIdentifier, false, new AuthorityKeyIdentifierStructure(rootCert)); certGen.addExtension(X509Extensions.SubjectKeyIdentifier, false, new SubjectKeyIdentifierStructure(request.getPublicKey("BC"))); certGen.addExtension(X509Extensions.BasicConstraints, true, new BasicConstraints(false)); //certGen.addExtension(X509Extensions.KeyUsage, true, new BasicConstraints(false)); certGen.addExtension(X509Extensions.KeyUsage, true, new KeyUsage(KeyUsage.digitalSignature | KeyUsage.keyEncipherment)); certGen.addExtension(X509Extensions.ExtendedKeyUsage, true, new ExtendedKeyUsage(KeyPurposeId.id_kp_serverAuth)); //extract the extension request attribute ASN1Set attributes = request.getCertificationRequestInfo().getAttributes(); for(int i=0;i!=attributes.size();i++) { Attribute attr = Attribute.getInstance(attributes.getObjectAt(i)); //process extension request if(attr.getAttrType().equals(PKCSObjectIdentifiers.pkcs_9_at_extensionRequest)) { X509Extensions extensions = X509Extensions.getInstance(attr.getAttrValues().getObjectAt(0)); Enumeration<?> e = extensions.oids(); while(e.hasMoreElements()) { DERObjectIdentifier oid = (DERObjectIdentifier)e.nextElement(); X509Extension ext = extensions.getExtension(oid); certGen.addExtension(oid, ext.isCritical(), ext.getValue().getOctets()); } } } X509Certificate issuedCert = certGen.generateX509Certificate(rootPair.getPrivate()); return new X509Certificate[]{issuedCert, rootCert}; } public static void main(String[] args) throws Exception { X509Certificate[] chain = buildChain(); PEMWriter pemWrt = new PEMWriter(new OutputStreamWriter(System.out)); pemWrt.writeObject(chain[0]); //pemWrt.writeObject(chain[1]); pemWrt.close(); //write it out //FileOutputStream fOut = new FileOutputStream("pkcs10req.req"); //fOut.write(chain[0].toString()); //fOut.write() //System.out.println(chain[0].toString()); //fOut.close(); } }

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• Zend without Database

  - by dbemerlin

  Hi, i googled for an hour now but maybe my Google-Fu is just too weak, i couldn't find a solution. I want to create an application that queries a service via JSON requests (all data and backend/business logic is stored in the service). With plain PHP it's simple enough since i just make a curl request, json_decode the result and get what i need. This already works quite well. A request might look like this: Call http://service-host/userlist with body: {"logintoken": "123456-1234-5678-901234"} Get Result: { "status": "Ok", "userlist":[ {"name": "foo", "id": 1}, {"name": "bar", "id": 2} ] } Now we want to get that into the Zend Framework since it's a hobby project and we want to learn about Zend. The problem is that all information i could find use a Database. Is there even a way to create a Zend Project that does not use a Database? And how can i write a model that represents the actions instead of objects and object-relations?

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• Convert a "by" object to a data frame in R

  - by lorin

  I'm using the "by" function in R to chop up a data frame and apply a function to different parts, like this: pairwise.compare <- function(x) { Nright <- ... Nwrong <- ... Ntied <- ... return(c(Nright=Nright, Nwrong=Nwrong, Ntied=Ntied)) } Z.by <- by(rankings, INDICES=list(rankings$Rater, rankings$Class), FUN=pairwise.compare) The result (Z.by) looks something like this: : 4 : 357 Nright Nwrong Ntied 3 0 0 ------------------------------------------------------------ : 8 : 357 NULL ------------------------------------------------------------ : 10 : 470 Nright Nwrong Ntied 3 4 1 ------------------------------------------------------------ : 11 : 470 Nright Nwrong Ntied 12 4 1 What I would like is to have this result converted into a data frame (with the NULL entries not present) so it looks like this: Rater Class Nright Nwrong Ntied 1 4 357 3 0 0 2 10 470 3 4 1 3 11 470 12 4 1 How do I do that?

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• How a database is loaded into an application?

  - by Audel

  Hi All i need is a simple explanation on how does this function work I also attached a piece of php which I think is the one that retrieves the data from the database. Please correct me if I'm wrong Cheers. function loadDatabaseRecords () { // Mozilla/Safari if (window.XMLHttpRequest) { xmlHttpReq = new XMLHttpRequest(); } // IE else if (window.ActiveXObject) { xmlHttpReq = new ActiveXObject("Microsoft.XMLHTTP"); } alert ("To Server (Load Records):\n\najax-open-DB.php"); xmlHttpReq.open('GET', "ajax-open-DB.php", true); xmlHttpReq.onreadystatechange = loadDatabaseRecordsCallback; xmlHttpReq.send(null); } <?php $link = mysql_connect ("ipaddress", "localhost", "password"); mysql_select_db ("database1"); $query = "SELECT * from addressbook"; $result = mysql_query ($query); print "<table>"; print "<tr>"; print "<th>Firstname</th><th>Lastname</th><th>Address</th><th>Telephone</th>"; print "</tr>"; for ($i = 0; $i < mysql_num_rows ($result); $i ++) { $row = mysql_fetch_object ($result); print "<tr>"; print "<td>$row->firstname</td>"; print "<td>$row->lastname</td>"; print "<td>$row->address</td>"; print "<td>$row->telephone</td>"; print "</tr>"; } print "</table>"; mysql_close ($link); ?>

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• python: strange behavior about exec statement

  - by ifocus

  exec statement: exec code [ in globals[, locals]] When I execute the following code in python, the result really confused me. Some of the variables were setup into the globals, some were setup into the locals. s = """ # test var define int_v1 = 1 list_v1 = [1, 2, 3] dict_v1 = {1: 'hello', 2:'world', 3:'!'} # test built-in function list_v2 = [float(x) for x in list_v1] len_list_v1 = len(list_v1) # test function define def func(): global g_var, list_v1, dict_v1 print 'access var in globals:' print g_var print 'access var in locals:' for x in list_v1: print dict_v1[x] """ g = {'__builtins__': __builtins__, 'g_var': 'global'} l = {} exec s in g, l print 'globals:', g print 'locals:', l exec 'func()' in g, l the result in python2.6.5: globals: {'__builtins__': <module '__builtin__' (built-in)>, 'dict_v1': {1: 'hello', 2: 'world', 3: '!'}, 'g_var': 'global', 'list_v1': [1, 2, 3]} locals: {'int_v1': 1, 'func': <function func at 0x00ACA270>, 'x': 3, 'len_list_v1': 3, 'list_v2': [1.0, 2.0, 3.0]} access var in globals: global access var in locals: hello world ! And if I want to setup all variables and functions into the locals, and keep the rights of accessing the globals. How to do ?

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• a query is inserted from PHPMYAdmin but not from PHP

  - by iyad al aqel

  i'm writing a php code to insert form values in a forum values $dbServer = mysql_connect("localhost" , "root", "") ; if(!$dbServer) die ("Unable to connect"); mysql_select_db("kfumWonder"); $name= $_POST['name'] ; $password= md5($_POST['password']); $email= $_POST['email'] ; $major= $_POST['major'] ; $dateOfBirth=$_POST['dateOfBirth'] ; $webSite = $_POST['website']; $joinDate= date("Y m d") ; $query = "INSERT INTO user (name, password, email, major, dob, website, join_date) Values ('$name', '$password', '$email', '$major', '$dateOfBirth', '$webSite' , '$joinDate')" ; //echo $query ; $result = mysql_query($query) ; if (! $result ) echo " no results " ; this works perfectly fine when i took the printed query and run it in PHPMyAdmin but when i run this code nothing happens , any ideas !?

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• Java regex, need help with escape characters

  - by Blankman

  My HTML looks like: <td class="price" valign="top"><font color= "blue">&nbsp;&nbsp;$&nbsp; 5.93&nbsp;</font></td> I tried: String result = ""; Pattern p = Pattern.compile("\"blue\">&nbsp;&nbsp;$&nbsp;(.*)&nbsp;</font></td>"); Matcher m = p.matcher(text); if(m.find()) result = m.group(1).trim(); Doesn't seem to be matching. Am I missing an escape character?

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• Trouble using South with Django and Heroku

  - by Dan

  I had an existing Django project that I've just added South to. I ran syncdb locally. I ran manage.py schemamigration app_name locally I ran manage.py migrate app_name --fake locally I commit and pushed to heroku master I ran syncdb on heroku I ran manage.py schemamigration app_name on heroku I ran manage.py migrate app_name on heroku I then receive this: $ heroku run python notecard/manage.py migrate notecards Running python notecard/manage.py migrate notecards attached to terminal... up, run.1 Running migrations for notecards: - Migrating forwards to 0005_initial. > notecards:0003_initial Traceback (most recent call last): File "notecard/manage.py", line 14, in <module> execute_manager(settings) File "/app/lib/python2.7/site-packages/django/core/management/__init__.py", line 438, in execute_manager utility.execute() File "/app/lib/python2.7/site-packages/django/core/management/__init__.py", line 379, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File "/app/lib/python2.7/site-packages/django/core/management/base.py", line 191, in run_from_argv self.execute(*args, **options.__dict__) File "/app/lib/python2.7/site-packages/django/core/management/base.py", line 220, in execute output = self.handle(*args, **options) File "/app/lib/python2.7/site-packages/south/management/commands/migrate.py", line 105, in handle ignore_ghosts = ignore_ghosts, File "/app/lib/python2.7/site-packages/south/migration/__init__.py", line 191, in migrate_app success = migrator.migrate_many(target, workplan, database) File "/app/lib/python2.7/site-packages/south/migration/migrators.py", line 221, in migrate_many result = migrator.__class__.migrate_many(migrator, target, migrations, database) File "/app/lib/python2.7/site-packages/south/migration/migrators.py", line 292, in migrate_many result = self.migrate(migration, database) File "/app/lib/python2.7/site-packages/south/migration/migrators.py", line 125, in migrate result = self.run(migration) File "/app/lib/python2.7/site-packages/south/migration/migrators.py", line 99, in run return self.run_migration(migration) File "/app/lib/python2.7/site-packages/south/migration/migrators.py", line 81, in run_migration migration_function() File "/app/lib/python2.7/site-packages/south/migration/migrators.py", line 57, in <lambda> return (lambda: direction(orm)) File "/app/notecard/notecards/migrations/0003_initial.py", line 15, in forwards ('user', self.gf('django.db.models.fields.related.ForeignKey')(to=orm['auth.User'])), File "/app/lib/python2.7/site-packages/south/db/generic.py", line 226, in create_table ', '.join([col for col in columns if col]), File "/app/lib/python2.7/site-packages/south/db/generic.py", line 150, in execute cursor.execute(sql, params) File "/app/lib/python2.7/site-packages/django/db/backends/util.py", line 34, in execute return self.cursor.execute(sql, params) File "/app/lib/python2.7/site-packages/django/db/backends/postgresql_psycopg2/base.py", line 44, in execute return self.cursor.execute(query, args) django.db.utils.DatabaseError: relation "notecards_semester" already exists I have 3 models. Section, Semester, and Notecards. I've added one field to the Notecards model and I cannot get it added on Heroku. Thank you.

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• Using md5_file(); doesn't return the md5 sometimes?

  - by Rob

  <?php include_once('booter/login/includes/db.php'); $query="SELECT * FROM shells"; $result=mysql_query($query); while($row=mysql_fetch_array($result, MYSQL_ASSOC)){ $hash = @md5_file($row['url']); echo $hash . "<br>"; } ?> The above is my code. Usually it works flawlessly on most urls, but every now and then it will just skip the md5 on a line, as if it doesn't retrieve it, even though the file is there. I can't figure out why. Any ideas?

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• Sql combine 2 rows to one

  - by Yan

  Hi , i have this table Testers employee name ------------ Sam Korch dan mano i want to combine tow rows to one, it will be "Sam Korch,Dan Mano" i have this query select @theString = COALESCE(@theString + ',', '') + EmployeeName from Testers join vw_EKDIR on Testers.TesterGlobalId = vw_EKDIR.GlobalID where TestId = 31 it working but i dont want to do select i want the result will be in @thestring so i try to do this query set @theString = ( select @theString = COALESCE(@theString + ',', '') + EmployeeName from Testers join vw_EKDIR on Testers.TesterGlobalId = vw_EKDIR.GlobalID where TestId = 31 ) it is not working ... i want @thestring will be the result. any idaes ? thanks

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• Multiple task in one page?(php - mysql - jquery)

  - by python

  My goal is to build an application in a page that can be use multiple task(crud) for example in this html code.there are multiple submit,multiple action in the same page after (user submit (CURD) it will load result table below.) In juery how Can I do this.? <script type="text/javascript" src="jquery.js"></script> <script> $(document).ready(function(){ $("#button1").click(function(){ $('form#crudform').attr({action: "script_1.php"}); $('form#crudform').submit(); }); $("#button2").click(function(){ $('form#crudform').attr({action: "script_2.php"}); $('form#crudform').submit(); }); $("#button3").click(function(){ $('form#crudform').attr({action: "script_3.php"}); $('form#crudform').submit(); }); }); </script> Form CRUD: <form id="crudform" method="post"> <p>Name: <input type="text" name="name"/></p> <p>Age: <input type="text" name="age"/></p> <input type="button" id="button1" value="Cancel" /> <input type="button" id="button2" value="Save" /> <input type="button" id="button3" value="Update" /> </form> Result: <form id="result" method="post"> <table border="1"> <tr> <tr><td></td><td>Name</td><td>Age</td> </tr> <tr><td><input type="checkbox" name="name1"></td><td>Name1</td><td>10</td><tr> <tr><td><input type="checkbox" name="name1"></td><td>Name2</td><td>15</td></tr> <tr><td><input type="checkbox" name="name3"></td><td>Name3</td><td>16</td></tr> </table> <input type="button" id="button4" value="change" /> <input type="button" id="button5" value="drop" /> </form> Anybody know the tutorials relating ..with my tasks.or tips,guide.....are welconme :)

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• Why I get a segmentation fault?

  - by frx08

  Why I get a segmentation fault? int main() { int height, width, step, step_mono, channels; int y, x; char str[15]; uchar *data, *data_mono; CvMemStorage* storage = cvCreateMemStorage(0); CvSeq* contour = 0; CvPoint* p; CvFont font; CvCapture *capture; IplImage *frame = 0, *mono_thres = 0; capture = cvCaptureFromAVI("source.avi"); //capture video if(!cvGrabFrame(capture)) exit(0); frame = cvRetrieveFrame(capture); //capture the first frame from video source cvNamedWindow("Result", 1); while(1){ mono_thres = cvCreateImage(cvGetSize(frame), 8, 1); height = frame -> height; width = frame -> width; step = frame -> widthStep; step_mono = mono_thres -> widthStep; channels = frame -> nChannels; data = (uchar *)frame -> imageData; data_mono = (uchar *)mono_thres -> imageData; //converts the image to a binary highlighting the lightest zone for(y=0;y < height;y++) for(x=0;x < width;x++) data_mono[y*step_mono+x*1+0] = data[y*step+x*channels+0]; cvThreshold(mono_thres, mono_thres, 230, 255, CV_THRESH_BINARY); cvFindContours(mono_thres, storage, &contour, sizeof(CvContour), CV_RETR_CCOMP, CV_CHAIN_APPROX_SIMPLE); //gets the coordinates of the contours and draws a circle and the coordinates in that point p = CV_GET_SEQ_ELEM(CvPoint, contour, 1); cvCircle(frame, *p, 1, CV_RGB(0,0,0), 2); cvInitFont(&font, CV_FONT_HERSHEY_PLAIN, 1.1, 1.1, 0, 1); sprintf(str, "(%d ,%d)", p->x, p->y); cvPutText(frame, str, cvPoint(p->x+5,p->y-5), &font, CV_RGB(0,0,0)); cvShowImage("Result", mono_thres); //next frame if(!cvGrabFrame(capture)) break; frame = cvRetrieveFrame(capture); if((cvWaitKey(10) & 255) == 27) break; } cvReleaseCapture(&capture); cvDestroyWindow("Result"); return 0; }

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• PHP Apostrophe and query string.

  - by cmaduro

  I want to supply a SQL statement from the query string, but all my efforts result in escaped single quotes and slashes.

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