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• Frustrated with Objective-c code...

  - by Moshe

  Well, I've started with iPod/iPhone programming using Head First iPhone Development (O'reilly) and I'm typing code out of the book. There are two problems, one is programming related and the other is not. I don't understand the format of objective-c methods. I'm getting an few errors now, based on source code from the book. Which leads me to my next issue. Some of the code is buggy. I think so because I couldn't get the code to run without modifying it. The book has some typos in the text since it's a first edition and whatnot, but could my "fixing" the code have to do with it? So... Where can I learn more about objective-c methods and how they work in terms of structure and where the return type and arguments go? For those with the book, I'm in the middle of the InstaTweet app towards the beginning. Thanks.

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• Renaming and Moving Files in Bash

  - by KT

  HI, I'm completely new to Bash and StackOverflow. I need to move a set of files (all contained in the same folder) to a target folder where files with the same name could already exist. In case a specific file exists, I need to rename the file before moving it, by appending for example an incremental integer to the file name. The extensions should be preserved. The file names could contain dots in the middle. Originally, I was thinking about comparing the two folders to have a list of the existing files (I did this with "comm"), but then I got a bit stuck. I think I'm just trying to do things in the most complicated possible way. Any hint to do this in the "bash way"?

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• How to do a STAR search in LINQ

  - by aNui

  I'm not sure about clarity of the STAR word. I'm implementing a search method using linq-to-object in c#. And I want to do a search with * (star) operator like most of search apps or web can do. e.g. If I typed "p*", results should be everything starting with "p". And it should work for prefix star, suffix star or star in the middle. And it would be great if the search can do with "-" (minus/NOT) operator or "+" (plus/OR) operator or "AND" operator Thanks in advance.

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• In your experience, what has inspired you to change a fundamental programming tool

  - by Dr J

  A lot of what I am working on is changing the mindset of a community of developers. Moving them from one tool to another, or to picking up a new tool. What are some of the suggested or recommended ways to get a community to pick up a new meme? While we can mandate tool usage, this is a last resort. I would rather have the developers move to any new tools of their own accord. I'm not a programmer, I need to understand why a programmer will move from one tool to another. Edited the title thanks to a fabulous comment! My world runs on Meme's, tipping points, and general pressures. This is why I needed to ask. And clarifying yet more- I am the middle manager needing to plan and manage an implementation and not a sales person.

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• Minimum Acceptable Code Coverage Numbers in the real world.

  - by Pita.O

  Hi, I am in the middle of putting together some guidelines around code coverage and I want to specify a number that really makes sense. It's easy to repeat the 100% mantra that I see all over the internet without considering the cost benefit analysis and when diminishing returns actually sets in. I solicit comments from persons who have actually reported code coverage on real-life, medium/large-sized projects. What percentages were you seeing? How much is too much? I really want some balance (in figures) that will help developers produce hight quality code. Is 65% coverage too low to expect? Is 80% too high?

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• DDMS plugin not loading GPX files

  - by Craig

  I am unable to load a GPX file in the DDMS eclipse plugin. When specifying a GPX file, no points are added to the emulator control list. I have tried adding KML files as well, generated in Google earth. Is there a way to get these files to work? The content of the file is listed below: <?xml version="1.0" encoding="UTF-8"?> <gpx version="1.0" creator="RunKeeper - http://www.runkeeper.com" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.topografix.com/GPX/1/0" xsi:schemaLocation="http://www.topografix.com/GPX/1/0 http://www.topografix.com/GPX/1/0/gpx.xsd"> <trk> <name>Running 11/30/09 3:37 pm11/30/09 3:37 pm</name> <time>2009-11-30T15:37:08Z</time> <trkseg> <trkpt lat="41.811406000" lon="-72.521427000"> <ele>37.000000</ele> <time>2009-11-30T15:37:08Z</time> </trkpt> <trkpt lat="41.811030000" lon="-72.522882000"> <ele>38.000000</ele> <time>2009-11-30T15:37:10Z</time> </trkpt>

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• Safe non-tamperable URL component in Perl using symmetric encryption?

  - by Randal Schwartz

  OK, I'm probably just having a bad Monday, but I have the following need and I'm seeing lots of partial solutions but I'm sure I'm not the first person to need this, so I'm wondering if I'm missing the obvious. $client has 50 to 500 bytes worth of binary data that must be inserted into the middle of a URL and roundtrip to their customer's browser. Since it's part of the URL, we're up against the 1K "theoretical" limit of a GET URL. Also, $client doesn't want their customer decoding the data, or tampering with it without detection. $client would also prefer not to store anything server-side, so this must be completely standalone. Must be Perl code, and fast, in both encoding and decoding. I think the last step can be base64. But what are the steps for encryption and hashing that make the most sense?

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• android content provider robustness on provider crash

  - by user1298992

  On android platforms (confirmed on ICS), if a content provider dies while a client is in the middle of a query (i.e. has a open cursor) the framework decides to kill the client processes holding a open cursor. Here is a logcat output when i tried this with a download manager query that sleeps after doing a query. The "sleep" was to reproduce the problem. you can imagine it happening in a regular use case when the provider dies at the right/wrong time. And then do a kill of com.android.media (which hosts the downloadProvider). "Killing com.example (pid 12234) because provider com.android.providers.downloads.DownloadProvider is in dying process android.process.media" I tracked the code for this in ActivityManagerService::removeDyingProviderLocked Is this a policy decision or is the cursor access unsafe after the provider has died? It looks like the client cursor is holding a fd for an ashmem location populated by the CP. Is this the reason the clients are killed instead of throwing an exception like Binders when the server (provider) dies ?

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• Who does non-decimal bignums with floating radix point?

  - by boost

  Nice as the Tcl libraries math::bignum and math::bigfloat are, the middle ground between the two needs to be addressed. Namely, bignums which are in different radices and have a radix point. At present math::bignum only handles integers (afaict) and math::bigfloat won't let you specify different radices to math::bigfloat::fromstr (ditto). Does anyone know of a library, for any of the major scripting languages (e.g. Tcl, Perl, Python, Ruby, Lua) or less major ones (newLISP for example), which implements bignums in different radices with handling for radix point?

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• Plain-English tutorial on artificial neural networks?

  - by Stuart

  I've Googled, StackOverflowed, everything, and I cannot seem to find a tutorial I can understand. I understand the concept of genetic algorithms, and how to implement them, (Though I haven't tried) but I cannot grasp the concept of neural networks. I know vaguely how they work... And that's about it. Could someone direct me to a tutorial that could help someone who has not even graduated middle school yet? Sure, I'm several years ahead of the majority of people my grade, but I don't understand summation, (which I apparently need if I don't want a simple binary output) vectors, and other things that I apparently should know. Is there a simple, bare-bones tutorial for neural networks? After I learn the basics, I'll proceed to more difficult ones. Preferably, they would be in Java. Thanks!

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• how to move and print squares visited by a knight in following order?

  - by josh kant

  Lets say you have a 5/5 board and you place and the knight started moving form the middle square. Every time knight moves it has to follow the following pattern. its easy if you draw what i mean. I am trying to code for the possible moves and print out the no. of moves in the nXn (in this case 5X5) board. The print out should be the no. of order in which the knight moved. { //move 1 //2 squares up and 1 to the left //move 2 //2 squares up and 1 to the right //move 3 //1 square up and 2 to the right //move 4 //1 square down and 2 to the right //move 5 //2 squares down and 1 to the right //move 6 //2 squares down and 1 to the left //move 7 //1 square down and 2 to the left //move 8 //one square up and 2 to the left } Any help would be appreciated. Thank you in advance..

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• Dissapearing object function??

  - by WmasterJ

  Is there a reason for object functions to be unset or deleted or simply not applied for any reason at all that isn't intentional? I am maintaining someone elses code and gone through it many times. I use Google Chromes awesome debuger and also TextMate. These help me find the origin of error relatively fast. The problem I have now is that i have an object: types. This object conatains...types. And these types have functions and other variables attached to them. For some reason in the middle of the code, this type has been passed by reference millions of times probably. When it comes to a certain part of the code parts of it, seem to have dissapeared. Puff! And it's gone..! Anyone have a clue (other than it being removed somewhere else earlier in the code, I'm already looking for that)

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• 3 or 4 monitors with Nvidia and Ubuntu

  - by Jason

  I saw that you are (were?) running 4 monitors with Ubuntu 8.10 and two Nvidia cards (http://stackoverflow.com/questions/27113/how-to-use-3-monitors). I was curious if you were doing this with Xinerama, a hacked up TwinView config, or multiple X screens, or some other method? Does it work with compiz? I intend to run my Dell 30" in the middle with two 1280x1024 on the sides and continue to use one X screen, and run compiz, on Ubuntu 9.04. Currently, I am using 2 monitors with twinview and compiz, which runs fantastic. I just can't get the third monitor running (unless I enable it in its own X screen, and then enable Xinerama to enable windows to be dragged as if all one X screen, but this breaks compiz, and I don't care much for having separate X screen). I am very interested in knowing how you set up 4 monitors with 2 GPU's. Thanks!

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• Sharing a custom datasource between Winforms and Webforms

  - by Earlz

  Hello, I'd like to create a custom datasource that is shared between a Winforms and Webforms project. This functions as a middle layer for a reporting tool(DevExpress Reporting). The Webforms project is a designer for these reports. So we want for the reports to be capable of going to the server to get data and such. So our datasource would abstract away all the communication overhead. Then, for consistency, the datasource would also run on the server for reporting, except for their would be no communication. What would be the best course of action? There doesn't seem to be such a thing as a DataSource in Winforms. Is DataSource not the thing I'm looking for? Edit: After some research, it appears that IDataAdapter may be good for my purpose. Any opinion on that?

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• Firefox ignoring padding

  - by iMaster

  I have this CSS code: #tweet-container{ width: 290px; height: 272px; border: 1px solid #CCC; color: #CCC; font-size: 28px; text-align: center; letter-spacing: -2px; min-height: 10px; display: table-cell; vertical-align: middle; padding: 15px; } But firefox doesn't seem to recognize the top and bottom padding. Safari and Chrome both show it normally, and even in Firebug when I add padding-top: it doesn't work. Its like its not a valid statement or something. Is there something I'm missing?

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• Multiple range product in Python

  - by Tyr

  Is there a better way to do this: perms = product(range(1,7),range(1,7),range(1,7)) so that I can choose how many ranges I use? I want it to be equivalent to this, but scalable. def dice(num) if num == 1: perms = ((i,) for i in range(1,7)) elif num == 2: perms = product(range(1,7),range(1,7)) elif num == 3: perms = product(range(1,7),range(1,7),range(1,7)) #... and so on but I know there has to be a better way. I'm using it for counting dice outcomes. The actual code def dice(selection= lambda d: d[2]): perms = itertools.product(range(1,7),range(1,7),range(1,7)) return collections.Counter(((selection(sorted(i)) for i in perms))) where I can call it with a variety of selectors, like sum(d[0:2]) for the sum of the lowest 2 dice or d[1] to get the middle dice.

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• How to make a DropDownList control display some items in bold ASP.Net

  - by james lewis

  I'm working with a custom DropDownList control in ASP.Net and there's been a request to display certain items in the list with a bold typeface (NOTE - the control inherits from CompositeDataBoundControl so it can be data bound... not DropDownListBox). The control is bound to a table and there's a column in the table named IsUsed - if this is set to true, the corresponding item in the list should be rendered bold. (It should be noted here that this will only ever be viewed in FireFox.) My experience is all in the middle \ backend tiers so the presentation layer is very new to me - can someone point me in the right direction? My initial thought was that somewhere in the custom control I would have access to all the rows that are returned from the data source which I could cycle through etc but I'm not sure if that's possible... There's also RenderContents which I can override... looks interesting! Any help appreciated - cheers. James

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• Progressbar with control template and its MouseDown event wpf

  - by Geetha

  Hi All, I am using a progress bar for the media element. i want to trigger Mousedown event for progress bar. Thai event is getting triggered only if i click on the border not in the middle(rectangle area to fill color) Code: <ControlTemplate x:Key="ratingBarTemplate" TargetType="{x:Type ProgressBar}"> <Border Name="PART_Track" Width="{TemplateBinding Width}" BorderBrush="Red" BorderThickness="2" > <Rectangle Name="PART_Indicator" Fill="Green" Height="{TemplateBinding Height}" FlowDirection="LeftToRight" HorizontalAlignment="Left"/> </Border> </ControlTemplate> <ProgressBar Name="probar" Minimum="0" Height="10" MouseDown="probar_MouseDown" BorderThickness="1" Template="{StaticResource ratingBarTemplate}" FlowDirection="LeftToRight"></ProgressBar> Geetha.

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• Understanding byte order and functions like CFSwapInt32HostToBig

  - by Typeoneerror

  I've got an enumeration in my game. A simple string message with an appended PacketType is being sent with the message (so it knows what to do with the message) over GameKit WIFI connection. I used Apple's GKRocket sample code as a starting point. The code itself is working fantastically; I just want to understand what the line with CFSwapInt32HostToBig is doing. What on earth does that do? and why does it need to do it? My guess is that it's making sure the PacketType value can be converted to an unsigned integer so it can send it reliably, but that doesn't sound all that correct to me. The documentation states "Converts a 32-bit integer from big-endian format to the host’s native byte order." but I don't understand what the means really. typedef enum { PacketTypeStart, // packet to notify games to start PacketTypeRequestSetup, // server wants client info PacketTypeSetup, // send client info to server PacketTypeSetupComplete, // round trip made for completion PacketTypeTurn, // packet to notify game that a turn is up PacketTypeRoll, // packet to send roll to players PacketTypeEnd // packet to end game } PacketType; // .... - (void)sendPacket:(NSData *)data ofType:(PacketType)type { NSLog(@"sendPacket:ofType(%d)", type); // create the data with enough space for a uint NSMutableData *newPacket = [NSMutableData dataWithCapacity:([data length]+sizeof(uint32_t))]; // Data is prefixed with the PacketType so the peer knows what to do with it. uint32_t swappedType = CFSwapInt32HostToBig((uint32_t)type); // add uint to data [newPacket appendBytes:&swappedType length:sizeof(uint32_t)]; // add the rest of the data [newPacket appendData:data]; // Send data checking for success or failure NSError *error; BOOL didSend = [_gkSession sendDataToAllPeers:newPacket withDataMode:GKSendDataReliable error:&error]; if (!didSend) { NSLog(@"error in sendDataToPeers: %@", [error localizedDescription]); } }

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• CSS vertcial centering split background image not overlapping

  - by user295292

  is it possible to split 2 images vertically and when resizing the browser, it wont overlap but stay vertically centered? can the left image stay fixed so the right side of it won't cut off(overlap) this is what i have now, but when resizing the browser smaller, it pushes the left image underneath the right. rather have the images cut off on the outer sides and never overlap each other in the middle, make sense? wrapper { width:1680px; max-width:1680px; height:500px; margin: 0 auto; } left-image { width: 50%; position:absolute; left: auto; height:500px; } right-image { width: 50%; position:absolute; right: 0px; height:500px; }

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• How to finish a broken data upload to the production Google App Engine server?

  - by WooYek

  I was uploading the data to App Engine (not dev server) through loader class and remote api, and I hit the quota in the middle of a CSV file. Based on logs and progress sqllite db, how can I select remaining portion of data to be uploaded? Going through tens of records to determine which was and which was not transfered, is not appealing task, so I look for some way to limit the number of record I need to check. Here's relevant (IMO) log portion, how to interpret work item numbers? [DEBUG 2010-03-30 03:22:51,757 bulkloader.py] [Thread-2] [1041-1050] Transferred 10 entities in 3.9 seconds [DEBUG 2010-03-30 03:22:51,757 adaptive_thread_pool.py] [Thread-2] Got work item [1071-1080] <cut> [DEBUG 2010-03-30 03:23:09,194 bulkloader.py] [Thread-1] [1141-1150] Transferred 10 entities in 4.6 seconds [DEBUG 2010-03-30 03:23:09,194 adaptive_thread_pool.py] [Thread-1] Got work item [1161-1170] <cut> [DEBUG 2010-03-30 03:23:09,226 bulkloader.py] [Thread-3] [1151-1160] Transferred 10 entities in 4.2 seconds [DEBUG 2010-03-30 03:23:09,226 adaptive_thread_pool.py] [Thread-3] Got work item [1171-1180] [ERROR 2010-03-30 03:23:10,174 bulkloader.py] Retrying on non-fatal HTTP error: 503 Service Unavailable

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• Ajax loader image: How to set a minimum duration during which the loader is shown?

  - by whamsicore

  I am using Jquery for Ajax functionality, and using a loader icon to indicate to the user that data is being retrieved. However, I want the user to see the loader icon for at least 1s, even if the data takes less than 1s to retrieve (if more than 1s is required, the loader icon should remain for the entire duration. Here is the code for the loader HTML <img id="loader" src="example.com/images/ loader.gif" style="vertical-align: middle; display: none" /> I am using the Jquery .Ajax function for my data processing.

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• How to Detect Forward and Back Mouse Button Events in Delphi?

  - by EagleOfToledo

  If a mouse has other buttons in addition to the standard left/right/middle (e.g. forward/back), how can we detect those button clicks in Delphi? An example of how this is used is the Internet Explorer, where the forward/back button on the side of a Logitech or MS mouse cycles forward and back between any loaded web pages. This seems to replicate the Backspace/CTRL+Backspace on the keyboard but I tried to detect that using KeyPreview and the KeyPress event but it does not pick it up. Any idea how to detect clicks on these extended mouse buttons?

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• SSAS Cube reprocessing fails - then succeeds if I try again

  - by EdgarVerona

  So I'm basically brand new to the concept of BI, and I've inherited an existing ETL process that is a two step process: 1) Loads the data into a database that is only used by the cube processing 2) Starts off the SSAS cube processing against said database It seems pretty well isolated, but occasionally (once a week, sometimes twice) it will fail with the following exception: "Errors in the OLAP storage engine: The attribute key cannot be found" Now the interesting thing is that: 1) The dimension having the issue is not usually the same one (i.e. there's no single dimension that consistently has this failure) 2) The source table, when I inspect it, does actually contain the attribute key that it says could not be found And, most interestingly... 3) If I then immediately reprocess the dimensions and cubes manually through SSMS, they reprocess successfully and without incident. In both the aforementioned job and when I reprocess them through SSMS, I am using "ProcessFull", so it should be reprocessing them completely. Has anyone run into such an issue? I'm scratching my head about it... because if it was a genuine data integrity issue, reprocessing the cube again wouldn't fix it. What on earth could be happening? I've been tasked with finding out why this happens, but I can neither reproduce it consistently nor can I point to a data integrity problem as the root cause. Thanks for any input you can provide!

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• get lattitude and longitude of a place against its zipcode

  - by yunas

  Hello i have used the following code to get the location of the particular place on map using the following piece of code NSString * urlString = [[NSString alloc] initWithFormat:@"http://maps.google.com/maps/geo?key=%@&output=xml&q=%@",GoogleMapsAPIKey,[placeName stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]; result: <?xml version="1.0" encoding="UTF-8" ?> <kml xmlns="http://earth.google.com/kml/2.0"><Response> <name>postdam</name> <Status> <code>200</code> <request>geocode</request> </Status> <Placemark id="p1"> <address>Potsdam, Germany</address> <AddressDetails Accuracy="4" xmlns="urn:oasis:names:tc:ciq:xsdschema:xAL:2.0"><Country><CountryNameCode>DE</CountryNameCode><CountryName>Deutschland</CountryName><AdministrativeArea><AdministrativeAreaName>Brandenburg</AdministrativeAreaName><SubAdministrativeArea><SubAdministrativeAreaName>Potsdam</SubAdministrativeAreaName><Locality><LocalityName>Potsdam</LocalityName></Locality></SubAdministrativeArea></AdministrativeArea></Country></AddressDetails> <ExtendedData> <LatLonBox north="52.4513968" south="52.3424614" east="13.1866602" west="12.9305414" /> </ExtendedData> <Point><coordinates>13.0586008,52.3969627,0</coordinates></Point> </Placemark> </Response></kml> but now i want to get the information agianst the zipcode how to do that using the maps.google.com ???

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