Search Results

Search found 7916 results on 317 pages for 'learning sam'.

Page 273/317 | < Previous Page | 269 270 271 272 273 274 275 276 277 278 279 280  | Next Page >

• Advice for Windows XP Scripting, WSH versus PowerShell

  - by Greg Graham

  After much experience scripting in the Unix/Linux open-source world, using languages such as Bourne Shell, Perl, Python, and Ruby, I now find myself needing to do some Windows XP admin scripting. It appears that the legacy environment is Windows Script Host (WSH), which can use various scripting languages, but the primary language is VBScript, and is based on COM objects. However, the future appears to be Windows PowerShell, which is based on .NET. I haven't done Basic since Applesoft in the 70s, so I'm not keen on learning VBScript, although I did learn enough to write a small script to mount network drives. If I'm going to spend time to really learn this, I'm leaning towards investing my time in the .NET PowerShell environment, if it truly is the future. I did some C# Windows Forms programming a couple of years ago, so I have some exposure to .NET, which also makes PowerShell attractive. Understanding that no one has a crystal ball to predict the future of Microsoft, I would like hear from anyone who is a PowerShell user and thinks it's worthwhile, or if there is anyone that knows of serious drawbacks to PowerShell, and recommends that I stay away from it. Update: I ended up using WSH/VBScript for a particular script that I am installing as a startup script on user's Windows XP workstations. All I have to do is copy it to their Startup folder, and I'm done. However, I only learned enough WSH to accomplish this one job. I am glad to see that PowerShell is the future, and when I have more complicated scripting tasks, I'll to turn PowerShell.

  Read the article

• ASP.Net application timeout

  - by ClarkeyBoy

  Hi, I have an application I have just deployed which, for complicated reasons, stores all the data from the database in a module the first time any data from the specific table is required (i.e. when a customer requests to view a product for the first time, all the product data is stored in the ProductManager class (of which an instance is stored in a shared property of the SiteContent class, making the ProductManager easily accessible from any page). Now forget that you are probably now glaring at me for using this approach.. I am sure it has its inefficiencies but I have only been studying .Net for a year or so now so I am still learning. One thing I have noticed is that I can go on the site once, then revisit it 5 minutes later and it will load all the data into the ProductManager class again. It seems this is a .Net application timeout thing - since the session timeout is set to 30 minutes and, when I am logged in on the administration frontend, it logs me out after 5 minutes (ish). Does anyone have any idea how to change this? Is there any way I can change this in the code without having to contact the hosting company? If not in the code is there any way to change this in the web.config? Thanks in advance. Regards, Richard

  Read the article

• XML validation error when using multiple schema files/namespaces

  - by user129609

  Hi, I've been reading a ton about xml and learning a lot but I am stuck on one error. I have a schema defined in multiple files and I can't get it to work. Here is an example ================================== libraryBooks.xsd <?xml version="1.0" encoding="utf-8"?> <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="urn:MyNamespace" targetNamespace="urn:MyNamespace" elementFormDefault="qualified" > <xsd:element name="libraryBooks" type="libraryBooksType"/> <xsd:complexType name="libraryBooksType"> <xsd:sequence> <xsd:any minOccurs="0"/> </xsd:sequence> <xsd:attribute name="name" type="xsd:string"/> </xsd:complexType> </xsd:schema> ================================== book.xsd <?xml version="1.0" encoding="utf-8"?> <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="urn:MyNamespace2" targetNamespace="urn:MyNamespace2" elementFormDefault="qualified" > <xsd:element name="book" type="booksType"/> <xsd:complexType name="bookType"> <xsd:attribute name="title" type="xsd:string"/> </xsd:complexType> </xsd:schema> ================================== myXml.xml <?xml version="1.0" encoding="utf-8" ?> <libraryBooks xmlns="urn:MyNamespace" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:MyNamespace file:///C:/libraryBooks.xsd" name="CentralLibrary"> <mn2:book xmlns:mn2="file:///C:/book.xsd" title="How to make xml work the way I want"> </mn2:book> </libraryBooks> So the error I get would be "The 'file:///C:/book.xsd:book' element is not found". Any ideas? I'm almost certain it is something simple

  Read the article

• Tablet as Car Computer

  - by Austin Fitzpatrick

  Okay, so forward this off to the right place if this isn't the right place to ask this question. I want to use a tablet computer as a car-computer. Minimum features would be to run my music (through iPod, Pandora, whatever I want) and GPS Navigation, watch TV or movies while I'm parked waiting for people, and the hard one: it needs to answer my phone calls with a pleasant interface much like in-dash systems do. It needs to detect that my phone is ringing in my pocket and provide an on-screen answer/ignore and then route the audio through the cars speakers. It would be nice to dial out and have address book access, but that is somewhat secondary. I have an iPhone myself and I figured that an iPad with 3G might make a good system for this - but I'm open to other options if an iPad can't do everything I need. I'm willing to write code, and I'm willing to jailbreak one or both devices. I haven't done much work in Obj-C, but I'm not opposed to learning a new language for this project. It's self enrichment for the most part, as I'm sure I can buy an indash entertainment system for less. Does anyone have experience with the iPhone/iPad SDK that can tell me whether or not it would be possible to get it an iPad to answer my calls in the car? What about an Android tablet? (that Adam looks promising, too).

  Read the article

• Best Practice for Shell Layout and Switching Views - Prism, SL4, On Demand Load Modules

  - by kmacmahon

  I am learning Prism, and I have a question on the best approach for the main Shell. Assuming the Shell has 2 regions: Toolbar, Main. The toolbar has 3 main buttons that each represent a different On Demand Load Module. Each of these modules currently register themselves as fitting in the Main Region. When I click one of the buttons I want to do the following: Notify any active view that its switching, with an option to cancel if there is a pending action still required. This might cascade to child views. If the action isn't cancelled then load the on demand module if it has not yet been loaded, else activate it within the region. Should these three modules all fit in the same Region or should my shell have 3 regions defined within content presenters? One of the areas I got stuck on was that when you register a view from the Module Initialize, it doesn't get added with a strongly typed name, so when I tried to determine if my view was already added to the region with GetView(viewname) it always returns null, so I end up adding another view to the region.

  Read the article

• Perform case-insensitive lookup on an Array in MongoDB?

  - by Hal

  So, I've decided to get my feet wet with MongoDB and love it so far. It seems very fast and flexible which is great. But, I'm still going through the initial learning curve and as such, I'm spending hours digging for info on the most basic things. I've search throughout the MongoDB online documentation and have spent hours Googling through pages without any mention of this. I know Mongo is still quite new (v1.x) so it explains why there isn't much information yet. I've even trying looking for books on Mongo without much luck. So yes, I've tried to RTFM with no luck, so, now I turn to you. I have an Array of various Hashtags nested in each document (ie: #apples, #oranges, #Apples, #APPLES) and I would like to perform a case-insensitive find() to access all the documents containing apples in any case. It seems that find does support some regex with /i, but I can't seem to get this working either. Anyway, I hope this is a quick answer for someone. Here's my existing call in PHP which is case sensitive: $cursor = $collection->find(array( "hashtags" => array("#".$keyword)))->sort(array('$natural' => -1))->limit(10); Help?

  Read the article

• Composite key syntax in Boost MultiIndex

  - by Sarah

  Even after studying the examples, I'm having trouble figuring out how to extract ranges using a composite key on a MultiIndex container. typedef multi_index_container< boost::shared_ptr< Host >, indexed_by< hashed_unique< const_mem_fun<Host,int,&Host::getID> >, // ID index ordered_non_unique< const_mem_fun<Host,int,&Host::getAgeInY> >, // Age index ordered_non_unique< const_mem_fun<Host,int,&Host::getHousehold> >, // Household index ordered_non_unique< // Age & eligibility status index composite_key< Host, const_mem_fun<Host,int,&Host::getAgeInY>, const_mem_fun<Host,bool,&Host::isPaired> > > > // end indexed_by > HostContainer; My goal is to get an iterator pointing to the first of the subset of elements in HostContainer hmap that has age partnerAge and returns false to Host::isPaired(): std::pair< hmap::iterator,hmap::iterator > pit = hmap.equal_range(boost::make_tuple( partnerAge, false ) ); I think this is very wrong. How/Where do I specify the iterator index (which should be 3 for age & eligibility)? I will include other composite keys in the future. What exactly are the two iterators in std::pair? (I'm copying syntax from an example that I don't understand.) I would ideally use std::count to calculate the number of elements of age partnerAge that are eligible (return false to Host::isPaired()). What is the syntax for extracting the sorted index that meets these requirements? I'm obviously still learning C++ syntax. Thanks in advance for any help.

  Read the article

• How do you handle key down events on Android? I am having issues making it work.

  - by user279112

  For an Android program, I am having trouble handling key down and key up events, and the problem I am having with them can almost certainly be generalized to any sort of user input event. I am using Lunar Lander as one of my main learning devices as I make my first meaningful program, and I noticed that it was using onKeyDown as an overridden method to receive key down events, and it would call one of their more original methods doKeyDown. But when I tried to implement a very small version of my own onKeyDown overide and the actual handler that it calls, it didn't work. I would probably copy and paste my implementations of those two methods, but that doesn't seem to be the problem. You see, I ran the debugger and noticed that they were not getting called - at all. The same goes for my implementations of onKeyUp and the handler that it calls. Something is a little weird here, and when I tried to look at the Android documentation for it, that didn't help at all. I thought that if you had an overide for onKeyDown, then when a key was pressed during execution of the program, onKeyDown would be called as soon as reasonably possible. End of story. But apparently there's something more to it. Apparently you have to do something else somewhere - possibly in the XML when defining the layout or something - to make it work. But I do not know what, and I could not find what in their documentation. What's the secret to this? Thanks!

  Read the article

• Is there any special tool for interactive GUI development

  - by niko

  Hi, Currently I am preparing exercises about networks and mobile communications for students. I was thinking about creating an interactive user-interface which enables the user to drag&drop predefined elements and then implement a logic based upon element distances etc. An example would be to place two base stations (a predefined element with several properties), set the scale in the interface and then check the signal interferrence in the environment (user-interface). The first part might be too abstract whereas the example might be too specific, but I was wondering whether there already exists any friendly framework or language which enables developers to create interactive interfaces (for teaching/learning purpouses) in short ammount of time. Usually I write applications for PC environment in .NET but in this case it would take too much time to create a specific interface for every exercise. I would appreciate if anyone could suggest any way to create interactive user-interface in short ammount of time. Are there any special programming languages or development tools for this kind of applications or are there any useful frameworks for .NET, Java or any other language to speed up the development of user-interfaces? Thank you!

  Read the article

• Android Custom View Constructor

  - by Mitch

  I'm learning about using Custom Views from the following: http://developer.android.com/guide/topics/ui/custom-components.html#modifying The description says: Class Initialization As always, the super is called first. Furthermore, this is not a default constructor, but a parameterized one. The EditText is created with these parameters when it is inflated from an XML layout file, thus, our constructor needs to both take them and pass them to the superclass constructor as well. Is there a better description? I've been trying to figure out what the constructor(s) should look like and I've come up with 4 possible choices (see example at end of post). I'm not sure what these 4 choices do (or don't do), why I should implement them, or what the parameters mean. Is there a description of these? Thanks. Mitch public MyCustomView() { super(); } public MyCustomView(Context context) { super(context); } public MyCustomView(Context context, AttributeSet attrs) { super(context, attrs); } public MyCustomView(Context context, AttributeSet attrs, Map params) { super(context, attrs, params); }

  Read the article

• .NET WF4: Should it be in the middle of everything?

  - by stimpy77

  I am aware that WF4 (Windows Workflow 4.0, part of .NET 4.0) is a significant rework and redesign of WF3, where much of what made WF3 a poor technology choice has been cleaned up in WF4. For example, as far as I can tell, WF4 (Windows Workflow 4.0) activities are more or less testable with [TestMethod] and mocking. This among other things, like improved performance, has grabbed my attention about the technology again, whereas I had previously pooh-poohed WF3. I'm working on a new architecture for essentially an n-tier collaborative application (not enterprise-class, just a smallish project with potential to grow significantly) where I'm already trying to discipline myself to use IoC and, to some extent, TDD, and I'm wondering, in general terms, whether it is wiser to just hand-code workflow logic or if I should delve into learning and integrating WF4 so that WF becomes literally the controller of the entire application, i.e. the practical C in "MVC" (not ASP.NET MVC but rather the pattern). So should workflow activities in WF4 be the primary controller for a highly expandable/growable web-based collaborative application? Or am I asking entirely the wrong question? This is a vague question, I'm sure, so abstract answers are as welcome as specific ones.

  Read the article

• Using Google Visualization in GWT 2.0

  - by nick

  I'm working on learning GWT (total newb) and have a question regarding the Visualiztion API provided by Google. This page: http://code.google.com/p/gwt-google-apis/wiki/VisualizationGettingStarted Describes getting started with a pie chart (which is what I need). However I'm trying to do this in a composite UI using UiBinder. To that end I don't know how to handle the callback correctly that is shown: public class SimpleViz implements EntryPoint { public void onModuleLoad() { // Create a callback to be called when the visualization API // has been loaded. Runnable onLoadCallback = new Runnable() { public void run() { Panel panel = RootPanel.get(); // Create a pie chart visualization. PieChart pie = new PieChart(createTable(), createOptions()); pie.addSelectHandler(createSelectHandler(pie)); panel.add(pie); } }; // Load the visualization api, passing the onLoadCallback to be called // when loading is done. VisualizationUtils.loadVisualizationApi(onLoadCallback, PieChart.PACKAGE); } My First assumption is this would go in the UiBinder constructor, correct? Yet this assumes that I want to place the element in the RootLayoutPanel, and I don't. I can't see an elegant and obvious way of placing it in the binder. I submit that even this guess may be wrong. Any ideas from the experts?

  Read the article

• Resizing image algorithm in python

  - by hippocampus

  So, I'm learning my self python by this tutorial and I'm stuck with exercise number 13 which says: Write a function to uniformly shrink or enlarge an image. Your function should take an image along with a scaling factor. To shrink the image the scale factor should be between 0 and 1 to enlarge the image the scaling factor should be greater than 1. This is not meant as a question about PIL, but to ask which algorithm to use so I can code it myself. I've found some similar questions like this, but I dunno how to translate this into python. Any help would be appreciated. I've come to this: import image win = image.ImageWin() img = image.Image("cy.png") factor = 2 W = img.getWidth() H = img.getHeight() newW = int(W*factor) newH = int(H*factor) newImage = image.EmptyImage(newW, newH) for col in range(newW): for row in range(newH): p = img.getPixel(col,row) newImage.setPixel(col*factor,row*factor,p) newImage.draw(win) win.exitonclick() I should do this in a function, but this doesn't matter right now. Arguments for function would be (image, factor). You can try it on OP tutorial in ActiveCode. It makes a stretched image with empty columns :.

  Read the article

• Class Structure w/ LINQ, Partial Classes, and Abstract Classes

  - by Jason

  I am following the Nerd Dinner tutorial as I'm learning ASP.NET MVC, and I am currently on Step 3: Building the Model. One part of this section discusses how to integrate validation and business rule logic with the model classes. All this makes perfect sense. However, in the case of this source code, the author only validates one class: Dinner. What I am wondering is, say I have multiple classes that need validation (Dinner, Guest, etc). It doesn't seem smart to me to repeatedly write these two methods in the partial class: public bool IsValid { get { return (GetRuleViolations().Count() == 0); } } partial void OnValidate(ChangeAction action) { if (!IsValid) { throw new ApplicationException("Rule violations prevent saving."); } } What I'm wondering is, can you create an abstract class (because "GetRuleViolations" needs to be implemented separately) and extend a partial class? I'm thinking something like this (based on his example): public partial class Dinner : Validation { public IEnumerable<RuleViolation> GetRuleViolations() { yield break; } } This doesn't "feel" right, but I wanted to check with SO to get opinions of individuals smarter than me on this. I also tested it out, and it seems that the partial keyword on the OnValidate method is causing problems (understandably so). This doesn't seem possible to fix (but I could very well be wrong). Thanks!

  Read the article

• Single-player pong game

  - by Jam

  I am just starting out learning pygame and livewires, and I'm trying to make a single-player pong game, where you just hit the ball, and it bounces around until it passes your paddle (located on the left side of the screen and controlled by the mouse), which makes you lose. However, I keep getting the error: "Cannot have more than on Screen object", which I can find no references to online really, and I can't make sense of it. I want to eventually make the game more complicated, but I need to make it work first. Help please! Here's the code so far: from livewires import games games.init(screen_width=640, screen_height=480, fps=50) class Paddle(games.Sprite): image=games.load_image("paddle.bmp") def __init__(self): super(Paddle, self).__init__(image=Paddle.image, y=games.mouse.y, left=0) self.score=games.Text(value=0, size=25, top=5, right=games.screen.width-10) games.screen.add(self.score) def update(self): self.y=games.mouse.y self.check_collide() def check_collide(self): for ball in self.overlapping_sprites: self.score.value+=1 self.score.right=games.screen.width-10 ball.handle_collide() class Ball(games.Sprite): image=games.load_image("ball.bmp") speed=1 def __init__(self, x, y=90): super(Ball, self).__init__(image=Ball.image, x=x, y=y, dx=Ball.speed, dy=Ball.speed) def update(self): if self.left<0: self.end_game() self.destroy() def handle_collide(self): if self.right>games.screen.width: self.dx=-self.dx if self.bottom>games.screen.height or self.top<0: self.dy=-self.dy def ball_destroy(self): self.destroy() def main(): background_image=games.load_image("background.bmp", transparent=False) games.screen.background=background_image the_ball=Ball() games.screen.add(the_ball) the_paddle=Paddle() games.screen.add(the_paddle) games.mouse.is_visible=False games.screen.event_grab=True games.screen.mainloop() main()

  Read the article

• TDD vs. Unit testing

  - by Walter

  My company is fairly new to unit testing our code. I've been reading about TDD and unit testing for some time and am convinced of their value. I've attempted to convince our team that TDD is worth the effort of learning and changing our mindsets on how we program but it is a struggle. Which brings me to my question(s). There are many in the TDD community who are very religious about writing the test and then the code (and I'm with them), but for a team that is struggling with TDD does a compromise still bring added benefits? I can probably succeed in getting the team to write unit tests once the code is written (perhaps as a requirement for checking in code) and my assumption is that there is still value in writing those unit tests. What's the best way to bring a struggling team into TDD? And failing that is it still worth writing unit tests even if it is after the code is written? EDIT What I've taken away from this is that it is important for us to start unit testing, somewhere in the coding process. For those in the team who pickup the concept, start to move more towards TDD and testing first. Thanks for everyone's input. FOLLOW UP We recently started a new small project and a small portion of the team used TDD, the rest wrote unit tests after the code. After we wrapped up the coding portion of the project, those writing unit tests after the code were surprised to see the TDD coders already done and with more solid code. It was a good way to win over the skeptics. We still have a lot of growing pains ahead, but the battle of wills appears to be over. Thanks for everyone who offered advice!

  Read the article

• How do you pass .net objects values around in F#?

  - by Russell

  I am currently learning F# and functional programming in general (from a C# background) and I have a question about using .net CLR objects during my processing. The best way to describe my problem will be to give an example: let xml = new XmlDocument() |> fun doc -> doc.Load("report.xml"); doc let xsl = new XslCompiledTransform() |> fun doc -> doc.Load("report.xsl"); doc let transformedXml = new MemoryStream() |> fun mem -> xsl.Transform(xml.CreateNavigator(), null, mem); mem This code transforms an XML document with an XSLT document using .net objects. Note XslCompiledTransform.Load works on an object, and returns void. Also the XslCompiledTransform.Transform requires a memorystream object and returns void. The above strategy used is to add the object at the end (the ; mem) to return a value and make functional programming work. When we want to do this one after another we have a function on each line with a return value at the end: let myFunc = new XmlDocument("doc") |> fun a -> a.Load("report.xml"); a |> fun a -> a.AppendChild(new XmlElement("Happy")); a Is there a more correct way (in terms of functional programming) to handle .net objects and objects that were created in a more OO environment? The way I returned the value at the end then had inline functions everywhere feels a bit like a hack and not the correct way to do this. Any help is greatly appreciated!

  Read the article

• Getting Vars to bind properly across multiple files

  - by Alex Baranosky

  I am just learning Clojure and am having trouble moving my code into different files. I keep detting this error from the appnrunner.clj - Exception in thread "main" java.lang.Exception: Unable to resolve symbol: -run-application in this context It seems to be finding the namespaces fine, but then not seeing the Vars as being bound... Any idea how to fix this? Here's my code: APPLICATION RUNNER - (ns src/apprunner (:use src/functions)) (def input-files [(resource-path "a.txt") (resource-path "b.txt") (resource-path "c.txt")]) (def output-file (resource-path "output.txt")) (defn run-application [] (sort-files input-files output-file)) (-run-application) APPLICATION FUNCTIONS - (ns src/functions (:use clojure.contrib.duck-streams)) (defn flatten [x] (let [s? #(instance? clojure.lang.Sequential %)] (filter (complement s?) (tree-seq s? seq x)))) (defn resource-path [file] (str "C:/Users/Alex and Paula/Documents/SoftwareProjects/MyClojureApp/resources/" file)) (defn split2 [str delim] (seq (.split str delim))) (defstruct person :first-name :last-name) (defn read-file-content [file] (apply str (interpose "\n" (read-lines file)))) (defn person-from-line [line] (let [sections (split2 line " ")] (struct person (first sections) (second sections)))) (defn formatted-for-display [person] (str (:first-name person) (.toUpperCase " ") (:last-name person))) (defn sort-by-keys [struct-map keys] (sort-by #(vec (map % [keys])) struct-map)) (defn formatted-output [persons output-number] (let [heading (str "Output #" output-number "\n") sorted-persons-for-output (apply str (interpose "\n" (map formatted-for-display (sort-by-keys persons (:first-name :last-name)))))] (str heading sorted-persons-for-output))) (defn read-persons-from [file] (let [lines (read-lines file)] (map person-from-line lines))) (defn write-persons-to [file persons] (dotimes [i 3] (append-spit file (formatted-output persons (+ 1 i))))) (defn sort-files [input-files output-file] (let [persons (flatten (map read-persons-from input-files))] (write-persons-to output-file persons)))

  Read the article

• Maintaining a Python web application: heavier vs lighter framework?

  - by Tiberiu Ana

  Five+ years from now, you are hired to support and extend a data-centric web application written in Python that hasn't been kept up to date. Would you rather prefer it was written in the current version of Django/Pylons at the time, using the available standard components, or kept minimal with something like CherryPy/web.py and a few library dependencies? Heavy framework Advantages: standard approach to application design and structure, as encouraged by framework; less application code to worry about. Disadvantages: requires learning the framework to understand how things work; broken things in old version of framework difficult to fix; upgrading to new version potentially difficult due to changing APIs; finding relevant documentation/help potentially difficult due to changing APIs. Light framework Advantages: most application code is directly "visible"; only needed features are implemented; architecture should be simpler to understand; less need to upgrade external dependencies; easier to upgrade external dependencies. Disadvantages: some reinventing the wheel; non-standard design and structure (with the associated unique issues and bugs). I will update the list with any helpful answers.

  Read the article

• HTML - Correct way of coding a checkbox with a Label.

  - by egarcia

  I've been using formtastic in order to generate HTML forms on rails applications. My question, however, is really HTML-related. Today I found a strange behaviour on the way formtastic generates checkboxes (fields of type :boolean on formtastic lingo). The rest of the fields (non-checkboxes) are generated this way: <li> <label for="my_textbox_field">My TextBox</label> <input id="my_textbox_field" type="text" ... > </li> Checkboxes, however, are enclosed inside their <label> tags completely - like this: <li> <label for="my_boolean_field"> <input id="my_boolean_field" type="checkbox" ... > This is my boolean field </label> </li> Formtastic phylosophy seems to be based on the Learning to Love Forms presentation. In effect, on slide 36 of that presentation this structure is suggested for checkboxes. I guess in the presentation itself the presenter explained why this was done, but it is not written on the slides. Can anyone tell me why enclosing checkboxes inside their <label> tag might be a good idea, as opposed to putting them outside, like with textboxes?

  Read the article

• Variable Scope Problem, iPhone

  - by Stumf

  Hello all, I need some help here so I will do my best to explain. I have worked on this all day and had no success (just learning!) I have: NSArray *getValue(NSString *iosearch) { ................................. ................................... \\ More code here } - (NSString *) serialnumber { NSArray *results = getValue(@"serial-number"); if (results) return [results objectAtIndex:0]; return nil; } - (NSString *) backlightlevel { NSArray *results = getValue(@"backlight-level"); if (results) return [results objectAtIndex:0]; return nil; } I have a tableView set up and want to display my array in it so I then have: - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {............. ......................................................... cell.text = [results objectAtIndex:indexPath.row]; // error results undeclared here return cell; } The problem is I get results undeclared as indicated above. I also can't figure how I could get serialnumber and backlightlevel to display on the click of a button or even at load. My attempts have thrown back errors like error: 'serialnumber' undeclared (first use in this function) and warnings like warning: 'return' with a value, in function returning void. Sorry for the long question! Many thanks, Stuart

  Read the article

• Objective-C scanf spaces issue

  - by Rob

  I am learning objective-C and for the life of me can't figure out why this is happening. When the user inputs when the code is: scanf("%c %lf", &operator, &number); For some reason it messes with this code: doQuit = 0; [deskCalc setAccumulator: 0]; while (doQuit == 0) { NSLog(@"Please input an operation and then a number:"); scanf("%c %lf", &operator, &number); switch (operator) { case '+': [deskCalc add: number]; NSLog (@"%lf", [deskCalc accumulator]); break; case '-': [deskCalc subtract: number]; NSLog (@"%lf", [deskCalc accumulator]); break; case '*': case 'x': [deskCalc multiply: number]; NSLog (@"%lf", [deskCalc accumulator]); break; case '/': if (number == 0) NSLog(@"You can't divide by zero."); else [deskCalc divide: number]; NSLog (@"%lf", [deskCalc accumulator]); break; case 'S': [deskCalc setAccumulator: number]; NSLog (@"%lf", [deskCalc accumulator]); break; case 'E': doQuit = 1; break; default: NSLog(@"You did not enter a valid operator."); break; } } When the user inputs for example "E 10" it will exit the loop but it will also print "You did not enter a valid operator." When I change the code to: scanf(" %c %lf", &operator, &number); It all of a sudden doesn't print this last line. What is it about the space before %c that fixes this?

  Read the article

• RDF correct approach to subClassOf

  - by Macarse

  I am learning RDF. What's the difference between this two approaches: a) <?xml version="1.0" encoding="UTF-8"?> <rdf:RDF xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:tur="http://www.blah.com/turismo#"> <rdf:Description rdf:about="http://www.blah.com/turismo#plaza"> <rdf:type rdf:resource="http://www.w3.org/2000/01/rdf-schema#Class"/> </rdf:Description> <rdf:Description rdf:about="http://www.blah.com/turismo#plazaSinFuente"> <rdf:type rdf:resource="http://www.w3.org/2000/01/rdf-schema#Class"/> <rdfs:subClassOf rdf:resource="http://www.blah.com/turismo#plaza"/> </rdf:Description> b) <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:tur="http://www.blah.com/turismo#"> <rdfs:Class rdf:ID="plaza"/> <rdfs:Class rdf:ID="plazaSinFuente"> <rdfs:subClassOf rdf:resource="#plaza"/> </rdfs:Class>

  Read the article

• Can a single developer still make money with shareware?

  - by Wouter van Nifterick

  I'm wondering if the shareware concept is dead nowadays. Like most developers, I've built up quite a collection of self-made tools and code libraries that help me to be productive. Some examples to give you an idea of the type of thing I'm talking about: A self-learning program that renames and orders all my mp3 files and adds information to the id3 tags; A Delphi component that wraps the Google Maps API; A text-to-singing-voice converter for musical purposes; A program to control a music synthesizer; A Gps-log <- KML <- ESRI-shapefile converter; I've got one of these already freely downloadable on my website, and on average it gets downloaded about a 150 times per month. Let's say I'd start charging 15 euro's for it; would there actually be people who buy it? How many? What would it depend on? If I could get some money for some of these, I'd finish them up a bit and put them online, but without that, I probably won't bother. Maintaining a SourceForge project is not very rewarding by itself. Is there anyone who is making money with shareware? How much? Any tips?

  Read the article

• How do you tune Eclipse IDE? How do you use Eclipse IDE?

  - by Kirzilla

  Hello, I've started to read the book "Code Craft" by Pete Goodliffe. The fourth chapter is about instruments that developer uses during his daily work; this chapter made me to review my work and I've seriously decided to make it easier with fully personalized IDE. Eclipse IDE is what I've started my learning from... I've read documentation and found that it's really easy to do tasks routine from Eclipse. We are using Mantis for tracking tasks and it was great surprise for me to find out Mantis Connector for Mylyn. Also I was pretty glad to see SVN client integrated into Eclipse IDE. Also I've found UML2 tool for Eclipse, but was disappointed because there is no any graphic interface for building diagramms. (Or, maybe, I'm was searching in wrong place?) What useful plugins do you use in your daily work? How do you use Eclipse for collaboration in your team? Do you have any links about intergration Eclipse IDE experience in dev. team? Thank you!

  Read the article

< Previous Page | 269 270 271 272 273 274 275 276 277 278 279 280  | Next Page >