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• Read Core data in Serial Queue for iPhone app

  - by user1277209

  I have an app which uses Core data and the values are fetched from a link on internet. This runs absolutely fine when I am creating a serial queue in AppDelegate and I am not facing any problem with the same. Now, when I am trying to re-create similar scenario in a UITableViewController and executing the same in a serial queue but when the control reaches NSError *error; NSArray *match = [context executeFetchRequest:fetchRequest error:&error]; execution control disappears and then this code remains in the execution till eternity. Can anyone help me with what exactly is wrong here? FYI, I am passing the same ManagedObjectContext to the serial queue.

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• Accessing hard-coded data in a C# application.

  - by haymansfield

  I'm trying to avaid hardcoding in a .net 2.0 soon to be 3.5 application. I have a large enumneration which I wish to map 1 to 1 to a set of strings. Each enumerated value will also map to 1 of 2 values indicating an action. The existing code does this with a big switch statement but this seems ugly to me. Is there a better way of storing and accessing the data? I've thought about resx files but when you consider that the designer file contains just as many hardcoded values it seems a little pointless. Is embedding an xml file in the assembly a good idea? Is a big switch statement not as bad as it seems? Is there a better solution?

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• Design report of 4-D data set

  - by phq

  I'm writing a report generator that will present data each being generated from 4 parameters. Time interval Group Measurement value(one of several to choose from) Device All these are orthogonal giving me a 4-D dataset to present. There are some simplifications where one parameter is the same for all and other parameters are merged. Still it appears as there are situations where all values are wanted on the report. In short the report should both be simple to overview and contain details. There will also be an interface where the user setup the range and granularity for each parameter. The most naive solution would be to have a 2D table where each cell contain another table with values of the remaining two dimensions. This is technically feasible but I'm worried that it would become hard to overview. Another approach is to present first two dimensions in a 2D table and the remaining parameters in groups Are there any good method to address this kind of issue?

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• Get binary data from audio impulses

  - by Timo

  I have IR sensor which have TRS plug and I can record my remotes signals into audio. Now I want to control my computer with TV remote, but I don't have any clue how to compare audio input with pre-recorded audio. But after I realized that these audio waves contains only some kind data (binary) I can turn these into binary or hex, so it is much easier to compare. Waves look just like this: http://i.imgur.com/lCIyl.png And this: ttp://i.imgur.com/goJ6d.png These are records of "OK" button, sometimes there are some impulses on right channel too and I don't know why, it seems like connections in sensor are damaged maybe. Ok thats not matter, anyway I need help with python program which read these impulses and turn these into binary, in realtime from audio input(mic). I know it's sounds like "Do it for me, while I enjoy my life", but I don't have experiences with sound transforming/reading... I've looking for python examples for recording and reading audio, but unsuccessfully.

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• AS3 Passing data between objects/classes

  - by 1337holiday

  So i a building a categorized menu of different foods. I have a class for "categories" (buttons) which essentially will return a string "salads", "drinks", etc. I now have another class "menuItems" for items within categories and this handles sizes such as "small", "med", "large", etc. My problem now is that when i return "salads", i want to invoke an array which contains all the elements of salads, send it to menuItems which will populate the menu. So far i have both the category objects and the menu object setup. I just cant seem to be able to send the data that the category object is returning and pass it to the menu object. Both of which are added to the stage as shown below: If there was a way that i could say add all these classes to one class so that they can talk to each other that would be great but i dont know how to do this. Been stuck for hours, please any help is greatly appreciated.

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• retrieving data from memcache

  - by Adnan

  Hello, I am starting to learn the benefits of memcache, and would like to implement it on my project. I have understood most of it, such as how data can be retrieved by a key and so on. Now I get it that I can put a post with all of its details in memcache and call the key POST:123, that is OK, and I can do it for each post. But how to deal with the case when I query the table posts to get the list of all posts with their titles. Can this be done with memcache, or should this always be queried from the table?

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• read text files containing binary data as a single matrix in matlab

  - by user1716595

  I have a text file which contains binary data in the following manner: 00000000000000000000000000000000001011111111111111111111111111111111111111111111111111111111110000000000000000000000000000000 00000000000000000000000000000000000000011111111111111111111111111111111111111111111111000111100000000000000000000000000000000 00000000000000000000000000000000000011111111111111111111111111111111111111111111111111111111100000000000000000000000000000000 00000000000000000000000000000000000111111111111111111111111111111111111111111111111111111111100000000000000000000000000000000 00000000000000000000000000000000000011111111111111111111111111111111111111111111111111111111100000000000000000000000000000000 00000000000000000000000000000000000000011111111111111111111111111111111111111111111111111111100000000000000000000000000000000 00000000000000000000000000000000000000011111111111111111111111111111111111111111111111000111110000000000000000000000000000000 00000000000000000000000000000000000000111111111111111111111111111111111111111111111111111111110000000000000000000000000000000 00000000000000000000000000000000000000000000111111111111111111111111111111111111110000000011100000000000000000000000000000000 00000000000000000000000000000000000000011111111111111111111111111111111111111111111111100111110000000000000000000000000000000 00000000000000000000000000000000000111111111111111111111111111111111111111111111111111110111110000000000000000000000000000000 00000000000000000000000000000000001111111111111111111111111111111111111111111111111111111111100000000000000000000000000000000 00000000000000000000000000000000000000001111111111111111111111111111111111111111111111000011100000000000000000000000000000000 00000000000000000000000000000000000000001111111111111111111111111111111111111111111111000011100000000000000000000000000000000 00000000000000000000000000000000000001111111111111111111111111111111111111111111111111111111000000000000000000000000000000000 00000000000000000000000000000000000000011111111111111111111111111111111111111111111110000011100000000000000000000000000000000 00000000000000000000000000000000000000000000011111111111111111111111111111111111100000000011100000000000000000000000000000000 00000000000000000000000000000000000000111111111111111111111111111111111111111111111111110111100000000000000000000000000000000 Plz note that each 1 or 0 is independent i.e the values are not decimal.I need to find the column wise sum of the file.There are 125 columns in all (here it is jumping onto the next line) and there are 840946 rows. I have tried textread,fscanf and a few other matlab commands but the result is that they all read each row in decimal format and create a 840946*1 array.I want to create a 840946*125 array to compute a column wise sum. Kindly help, Thanks!

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• How to set up default value in symfony2 select box with data from database

  - by user172409255

  I have this code ->add('user', 'entity', array( 'class' => 'Acme\Entity\User', 'query_builder' => function(EntityRepository $er) use ($options) { return $er->createQueryBuilder('u') ->orderBy('u.name', 'ASC'); }, 'data' => $option['id'] )) Its not working public function buildForm(FormBuilderInterface $builder, array $options) { $builder ->add('description') ->add('user', 'entity', array( 'class' => 'Acme\Entity\User', 'query_builder' => function(EntityRepository $er) use ($options) { return $er->createQueryBuilder('u'); }, 'preferred_choices' => array('2') )) ; }

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• Initial form data from model - Django

  - by alexBrand

  I am trying to create an edit form for my model. I did not use a model form because depending on the model type, there are different forms that the user can use. (For example, one of the forms has a Tinymce widget, while the other doesn't.) Is there any way of setting the initial data of a form (not a ModelForm) using a model? I tried the following but getting an error: b = get_object_or_404(Business, user=request.user) form = f(initial = b) where f is a subclass of forms.Form The error I am getting is AttributeError: 'Business' object has on attribute 'get'

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• Should repeated use of the camera crash an app?

  - by Sam

  I have an app that builds a slideshow from user images. They can grab from their library or take a picture. I have found that repeated use of grabbing an image from the library is fine. But repeated use of taking a picture causes erratic behavior. I have been getting crashes but mostly what happens seems to be a reloading of the view after "didFinishPickingMediaWithInfo", which messes things up. I have no leaks and it seems to be releasing properly after each picture is taken. I am resizing the image and saving it in a data base. Is anyone else running into this situation? Was the camera not designed to be called this often?

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• Why should i POST data rather then GET?

  - by acidzombie24

  I know you dont want to POST a form with a username and password where anyone could use the history to see or situations where repeat actions may not be desired (refreshing a page = adding an item to a cart may not be desired). So i have an understanding when i may want to use one over the other. But i could always have the server redirect the url after a get to get around the cart problem and maybe most of my forms will work perfectly fine with get. WHY should i use POST over get? I dont understand the benefits of one over the other. I do notice post doesnt add data to the history/url and will warn you about refreshing the page but those are the only two differences i know of. Why as a developer might i want to use one over the other?

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• Importing data from a text file using python

  - by Will

  I have a text file containing data in rows and columns (~17000 rows in total). Each column is a uniform number of characters long, with the 'unused' characters filled in by spaces. For example, the first column is 11 characters long, but the last four characters in that column are always spaces (so that it appears to be a nice column when viewed with a text editor). Sometimes it's more than four if the entry is less than 7 characters. The columns are not otherwise separated by commas, tabs, or spaces. They are also not all the same number of characters (the first two are 11, the next two are 8 and the last one is 5 - but again, some are spaces). What I want to do is import the entires (which are numbers) in the last two columns if the second column contains the string 'OW' somewhere in it. Any help would be greatly appreciated.

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• Mysterious different conversion to string[] of seemingly same input data

  - by Roman Kuzmin

  During investigation of some problem I found that the reason was unexpected different conversion to string[] of seemingly same input data. Namely, in the code below two commands both return the same two items File1.txt and File2.txt. But conversion to string[] gives different results, see the comments. Any ideas why is it? This might be a bug. If anybody also thinks so, I’ll submit it. But it would nice to understand what’s going on and avoid traps like that. # *** WARNING # *** Make sure you do not have anything in C:\TEMP\Test # *** The code creates C:\TEMP\Test with File1.txt, File2.txt # Make C:\TEMP\Test and two test files $null = mkdir C:\TEMP\Test -Force 1 | Set-Content C:\TEMP\Test\File1.txt 1 | Set-Content C:\TEMP\Test\File2.txt # This gets just file names [string[]](Get-ChildItem C:\TEMP\Test) # This gets full file paths [string[]](Get-ChildItem C:\TEMP\Test -Include *) # Output: # File1.txt # File2.txt # C:\TEMP\Test\File1.txt # C:\TEMP\Test\File2.txt

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• PHP MySQL Insert Data

  - by happyCoding25

  Hello, Im trying to insert data into a table in MySQL. I found/modified some code from w3Schools and still couldn't get it working. Heres what I have so far: <?php $rusername=$_POST['username']; $rname=$_POST['name']; $remail=$_POST['emailadr']; $rpassword=$_POST['pass']; $rconfirmpassword=$_POST['cpass']; if ($rpassword==$rconfirmpassword) { $con = mysql_connect("host","user","password"); if (!$con) { die('Could not connect: ' . mysql_error()); } mysql_select_db("mydbname ", $con); } mysql_query("INSERT INTO members (id, username, password) VALUES ('4', $rusername, $rpassword)"); ?> Did I mistype something? To my understanding "members" is the name of the table. If anyone knows whats wrong I appreciate the help. Thanks

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• Separating MySQL SELECT statement based on data in a column

  - by NightMICU

  Hi everyone, I need to retrieve data (vehicle details, in this case) from a MySQL table tabled and then loop through the results to generate separate lists for each category of vehicle. Is there a simple way to do this without having to have a SELECT statement for each type of vehicle? If I were just doing this for one category, I would use the following: <?php $sql = "SELECT * FROM apparatus WHERE vehicleType = 'Support'; $getSQL = mysql_query($sql); ?> <ul> <?php while ($vehicleData = mysql_fetch_assoc($getSQL)) {?> <li><?php echo $vehicleData['name'];?></li> <?php } ?> </ul> ..etc. Need to do this for four different types of vehicles. Thanks!

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• Measure data transfer rate over tcp using c#

  - by publicENEMY

  i want to measure current download speed. im sending huge file over tcp. how can i capture the transfer rate every second? if i use IPv4InterfaceStatistics or similar method, instead of capturing the file transfer rate, i capture the device transfer rate. the problem with capturing device transfer rate is that it captures all ongoing data through the network device instead of the single file that i transfer. how can i capture the file transfer rate? im using c#.

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• Get data from Joomla jos_users table

  - by RobertR

  Hello, world! I'm trying to build a little bit advanced users system using Joomla, but I stuck at one spot. I added new field on Joomla's jos_users table, but when I wanted to get that field out, like "echo" - it didn't worked at all. Any other data, even password field I can get without problems. Of course, I added new value in /var/www/<project>/libraries/joomla/user/user.php like this after line 40. /** * The users address name * @var string */ var $address = null; What might be the problem here? Or what I did wrong, or what I didn't do at all? Thanks for replies! Cheerio

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• How does Google Analytics save data to a database

  - by Pranz

  Hello everyone, I am making a Google Analytics like project for my school assignment. I have two questions primarily: 1) Exactly when does Google store the data to the database? When it does it use XHR with some server side scripting language to store it to the database or is there a way to do it using plain javascript? 2) How do I get the IP address of a user from Javascript? How does Google do for Analytics?? Thanks for all the help. Pranz

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• C# String builder, displaying data nicely spaced out.

  - by Sef

  Hello, I am wondering how exactly can i order my date nicely in a stringbuilder? Meaning something equal to ("{0,2}", ....) to space the data nicely out. I do not want to use consolewrites of any kind, so the class can be re-used in a form, console code etc... Currently i am using " " for the spacing, but in overall it does not give a proper display. (it messed up when i have numbers with more then 1 digit) public override string ToString() { StringBuilder builder = new StringBuilder(); foreach (int value in tabel) { builder.Append(value); // should have something similiar to ("{0,2}", ....) builder.Append(" "); // should have something similiar to ("{0,2}", ....) } builder.Append("(top:"); builder.Append(top); builder.Append(")"); return builder.ToString(); }/*ToString*/ Regards.

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• Getting data from the next row in Oracle cursor

  - by Chaotic_one

  Hi, I'm building nested tree and I need to get data for the next row in cursor, using Oracle. And I still need current row, so looping forward is not a solution. Example: OPEN emp_cv FOR sql_stmt; LOOP FETCH emp_cv INTO v_rcod,v_rname,v_level; EXIT WHEN emp_cv%NOTFOUND; /*here lies the code for getting v_next_level*/ if v_next_level > v_level then /*code here*/ elsif v_next_level < v_level then /*code here*/ else /*code here*/ end if; END LOOP; CLOSE emp_cv;

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• jquery ajax call: multiple links load data into one div

  - by user1146939

  I have a dynamically generated list of links. Each link will request a different page to load. Depending on the link clicked I want it to fill the div with an ajax .load call. The thing is I want all links to reset and fill the same div. I am having trouble doing this without making a seperate div for each link, which isn't what I'm looking for. This is what I have so far, but only works with one link. <a data-toggle="modal" href="#myModal">Link</a> <div class="modal hide fade" id="myModal"></div> <script type="text/javascript"> $(document).ready(function() { $('#myModal').load('mypage.php'); }); </script>

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• Join data from two Lists into one object

  - by Petr Mensik

  I ran into following situation and I am wondering about best solution. Let's say I have List<Object1> and List<Object2>, these lists are result of two separated queries. Both of them have the same size and there is relationship 1:1 between elements in the lists based on ID. I know that best solution would be fetching data in one DB query but that's possible right now. So my question is, what is the best way to join these lists into let's say List<Object3>?

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• Drop Columns R Data frame

  - by Btibert3

  I have a number of columns that I would like to drop from a data frame. I know that we can drop them using something like: df$x <- NULL but I was hoping to do this with less commands. Also, I know that I could use this: df[ -c(1,3:6, 12) ] but I am concerned that the relative position of my variables may change. Given how powerful R is, I figured I would ask to see if there is another way beyond dropping each column 1 by 1. Thanks in advance.

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• jquery load data

  - by nabizan

  dumbest question ever... but I want to somehow fill 'gid' value in data load gid = 123; from = 33; to = 44; $('#x').load('y', {'range['+gid+'][]' : [from , to]}); so I could get [range] => Array ( [123] => Array ( [0] => 33 [1] => 44 ) ) but with this syntax 'range['+gid+'][]' I get 'missing : after property id'. I'm desperate...

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• Data manipulation without server side

  - by monczek

  Hi, I have to create a very simple webpage to show, filter and add data from not-yet-defined source (probably txt/xml/cvs). Records should be visible as a table, filtered using 3 criteria fields. There should be also possibility to add new records. My first thought was: XHTML + jQuery + csv2table + PicNet Table Filter. It does exactly what I want except adding rows - that is saving changes in source file (probably due to security risk). My question is - is there any possibility to do it without involving server side like asp.net, jee, php, sql? Source file is located on the server. Thanks for your ideas :-)

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