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  • Can't use method from class in other file

    - by user1833848
    I am not able to use one of my methods that i implemented in my tableviewcell file in my tableview controller implementation. I tried searching the web and xcode help with no luck. My codes looks like this: TableViewController.h: #import TableViewCell.h @interface TableViewController : UITableViewController @property (nonatomic, strong) IBOutlet UIBarButtonItem *A1Buy; @property (nonatomic, getter = isUserInteractionEnabled) BOOL userInteractionEnabled; - (IBAction)A1Buy:(UIBarButtonItem *)sender; TableViewController.m: @implementation A1ViewController @synthesize A1Buy = _A1Buy; @synthesize userInteractionEnabled; - (IBAction)A1Buy:(UIBarButtonItem *)sender { [TableViewCell Enable]; //this is where it gives an error } TableViewCell.h: @interface TableViewCell : UITableViewCell { BOOL Enable; BOOL Disable; } @property (nonatomic, getter = isUserInteractionEnabled) BOOL userInteractionEnabled; TableViewCell.m: @implementation TableViewCell; @synthesize userInteractionEnabled; - (BOOL) Enable { return userInteractionEnabled = YES; } - (BOOL) Disable { return userInteractionEnabled = NO; } As you can see i am trying to enable user interaction with a button, but Xcode only gives me errors like "class does not have this method" and stuff like that. All files are importet correctly so thats not why. Would appreciate any help. Thanks!

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  • jquery dialog calls a server side method with button parameters

    - by Chiefy
    Hello all, I have a gridview control with delete asp:ImageButton for each row of the grid. What I would like is for a jquery dialog to pop up when a user clicks the delete button to ask if they are sure they want to delete it. So far I have the dialog coming up just fine, Ive got buttons on that dialog and I can make the buttons call server side methods but its getting the dialog to know the ID of the row that the user has selected and then passing that to the server side code. The button in the page row is currently just an 'a' tag with the id 'dialog_link'. The jquery on the page looks like this: $("button").button(); $("#DeleteButton").click(function () { $.ajax({ type: "POST", url: "ManageUsers.aspx/DeleteUser", data: "{}", contentType: "application/json; charset=utf-8", dataType: "json", success: function (msg) { // Replace the div's content with the page method's return. $("#DeleteButton").text(msg.d); } }); }); // Dialog $('#dialog').dialog({ autoOpen: false, width: 400, modal: true, bgiframe: true }); // Dialog Link $('#dialog_link').click(function () { $('#dialog').dialog('open'); return false; }); The dialog itself is just a set of 'div' tags. Ive thought of lots of different ways of doing this (parameter passing, session variable etc...) but cant figure out how to get any of them working. Any ideas are most welcome As always, thanks in advance to those who contribute.

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  • Method invoked but not returning anything

    - by or azran
    i am calling this method from a touch in UITableViewCell , -(void)PassTitleandiMageByindex:(NSString *)number{ NSLog(@"index : %d",number.intValue); NSArray *objectsinDictionary = [[[NSArray alloc]init]autorelease]; objectsinDictionary = [[DataManeger sharedInstance].sortedArray objectAtIndex:number.intValue]; if ([objectsinDictionary count] > 3) { ProductLabel = [objectsinDictionary objectAtIndex:3]; globaliMageRef = [objectsinDictionary objectAtIndex:2]; [self performSegueWithIdentifier:@"infoseg" sender:self]; }else{ mQid = [objectsinDictionary objectAtIndex:1]; globaliMageRef = [objectsinDictionary objectAtIndex:2]; [mIQEngines Result:mQid]; NSLog(@"mQid : %@ Global : %@",mQid,globaliMageRef); }} Problem:- i am trying to get the same functionality programmatically by calling [self PassTitleandiMageByindex:stringNumber]; when i am calling this programmatically i can see the debug log getting in the place it should be, but nothing happens (by pressing the UITableViewCellon the screen) here is how it turns on by touch, - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{ [tableView deselectRowAtIndexPath:indexPath animated:YES]; NSString *st = [NSString stringWithFormat:@"%d",[indexPath row]]; [self PassTitleandiMageByindex:st];} I have also tried to call the table-view delegate by :[[Tview delegate] tableView:Tview didSelectRowAtIndexPath:selectedCellIndexPath]; but, nothing happened.

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  • AS3---TypeError: Error #1009: Cannot access a property or method of a null object reference

    - by user571620
    I'm very new to flash and I really have no idea what I'm doing. Thank you in advance. its giving me that error after I click a button to go to another frame. After I get the error, some buttons do not go to its destination and instead it just does nothing. The error is as follows: TypeError: Error #1009: Cannot access a property or method of a null object reference. at wmhssports_fla::MainTimeline/frame39() Here is the code for frame 39: stop(); winter_btn.addEventListener(MouseEvent.CLICK, buttonClick1); function buttonClick1(event:MouseEvent):void{ gotoAndPlay(39); }; spring_btn_boys.addEventListener(MouseEvent.CLICK, buttonClick10); function buttonClick10(event:MouseEvent):void{ gotoAndPlay(114); }; fall_btn_boys.addEventListener(MouseEvent.CLICK, buttonClick11); function buttonClick11(event:MouseEvent):void{ gotoAndPlay(135); }; Edit: I could email the file to someone, if they could look at it for me? Its REALLY sketchy due to my inexperience with flash, but then again its not that big of a clip. email me at: [email protected]

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  • NoMethodError / undefined method `foobar_path' when using form_for

    - by user1850886
    I'm using form_for to create a chatroom and when I view the page I get the following error: NoMethodError in Chatrooms#new undefined method `chatrooms_path' for #<#<Class:0xa862b94>:0xa5307f0> Here's the code for the view, located in app/views/chatrooms/new.html.erb: <div class="center"> <%= form_for(@chatroom) do |f| %> <%=f.text_field :topic%> <br> <%=f.submit "Start a discussion", class: "btn btn-large btn-primary"%> <% end %> </div> Here's the relevant controller: class ChatroomsController < ApplicationController def new @chatroom = Chatroom.new end def show @chatroom = Chatroom.find(params[:id]) end end If I change the line <%= form_for(@chatroom) do |f| %> to <%= form_for(:chatroom) do |f| %> it works fine. I've searched around for similar questions but none of the solutions have worked for me. Help?

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  • Fastest method to define whether a number is a triangular number

    - by psihodelia
    A triangular number is the sum of the n natural numbers from 1 to n. What is the fastest method to find whether a given positive integer number is a triangular one? I suppose, there must be a hidden pattern in a binary representation of such numbers (like if you need to find whether a number is even/odd you check its least significant bit). Here is a cut of the first 1200th up to 1300th triangular numbers, you can easily see a bit-pattern here (if not, try to zoom out): (720600, '10101111111011011000') (721801, '10110000001110001001') (723003, '10110000100000111011') (724206, '10110000110011101110') (725410, '10110001000110100010') (726615, '10110001011001010111') (727821, '10110001101100001101') (729028, '10110001111111000100') (730236, '10110010010001111100') (731445, '10110010100100110101') (732655, '10110010110111101111') (733866, '10110011001010101010') (735078, '10110011011101100110') (736291, '10110011110000100011') (737505, '10110100000011100001') (738720, '10110100010110100000') (739936, '10110100101001100000') (741153, '10110100111100100001') (742371, '10110101001111100011') (743590, '10110101100010100110') (744810, '10110101110101101010') (746031, '10110110001000101111') (747253, '10110110011011110101') (748476, '10110110101110111100') (749700, '10110111000010000100') (750925, '10110111010101001101') (752151, '10110111101000010111') (753378, '10110111111011100010') (754606, '10111000001110101110') (755835, '10111000100001111011') (757065, '10111000110101001001') (758296, '10111001001000011000') (759528, '10111001011011101000') (760761, '10111001101110111001') (761995, '10111010000010001011') (763230, '10111010010101011110') (764466, '10111010101000110010') (765703, '10111010111100000111') (766941, '10111011001111011101') (768180, '10111011100010110100') (769420, '10111011110110001100') (770661, '10111100001001100101') (771903, '10111100011100111111') (773146, '10111100110000011010') (774390, '10111101000011110110') (775635, '10111101010111010011') (776881, '10111101101010110001') (778128, '10111101111110010000') (779376, '10111110010001110000') (780625, '10111110100101010001') (781875, '10111110111000110011') (783126, '10111111001100010110') (784378, '10111111011111111010') (785631, '10111111110011011111') (786885, '11000000000111000101') (788140, '11000000011010101100') (789396, '11000000101110010100') (790653, '11000001000001111101') (791911, '11000001010101100111') (793170, '11000001101001010010') (794430, '11000001111100111110') (795691, '11000010010000101011') (796953, '11000010100100011001') (798216, '11000010111000001000') (799480, '11000011001011111000') (800745, '11000011011111101001') (802011, '11000011110011011011') (803278, '11000100000111001110') (804546, '11000100011011000010') (805815, '11000100101110110111') (807085, '11000101000010101101') (808356, '11000101010110100100') (809628, '11000101101010011100') (810901, '11000101111110010101') (812175, '11000110010010001111') (813450, '11000110100110001010') (814726, '11000110111010000110') (816003, '11000111001110000011') (817281, '11000111100010000001') (818560, '11000111110110000000') (819840, '11001000001010000000') (821121, '11001000011110000001') (822403, '11001000110010000011') (823686, '11001001000110000110') (824970, '11001001011010001010') (826255, '11001001101110001111') (827541, '11001010000010010101') (828828, '11001010010110011100') (830116, '11001010101010100100') (831405, '11001010111110101101') (832695, '11001011010010110111') (833986, '11001011100111000010') (835278, '11001011111011001110') (836571, '11001100001111011011') (837865, '11001100100011101001') (839160, '11001100110111111000') (840456, '11001101001100001000') (841753, '11001101100000011001') (843051, '11001101110100101011') (844350, '11001110001000111110') For example, can you also see a rotated normal distribution curve, represented by zeros between 807085 and 831405?

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  • undefined method `model_name' for NilClass:Class - Rails application

    - by user1270259
    So I have seen other articles here on stack about this and a lot of the time people are not doing @post = post.new. I read some where to use the plural...?? any ways I am getting this error on my discussion code: Discussion Controller class DiscussionsController < ApplicationController def index @discussion = Discussion.new @discussions = Discussion.all end def create @discussion = Discussion.create(params[:discussion]) if @discussion.save redirect_to tasks_path, :flash => {:success => 'Created a new discussion'} else redirect_to tasks_path, :flash => {:error => 'Failed to create a discussion'} end end end Discussion Form <%= form_for @discussion do |f| %> <p><%= f.label :title %> <%= f.text_field :title %></p> <p><%= f.label :content %> <%= f.text_area :content %></p> <% end %> Discussion Routes resources :discussions do resources :comments end Now as far as I know I am doing this right, because I have a task form set up essentially the same way - but I have looked at my code for hours and have googled and tried other examples and now i see this: undefined method `model_name' for NilClass:Class Extracted source (around line #1): 1: <%= form_for @discussion do |f| %> 2: 3: <p><%= f.label :title %> 4: <%= f.text_field :title %></p> Which should mean that I am missing something from my controller.....is it as asilly as a spelling mistake? .

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  • Obj-c method override/polymorphism problem

    - by Rod
    Ok, so I'm using Objective-C. Now, say I have: TopClass : NSObject - (int) getVal {return 1;} MidClass : TopClass - (int) getVal {return 2;} BotClass : MidClass - (int) getVal {return 3;} I then put objects of each type into an NSMutableArray and take one out. What I want to do is run the getVal func on the appropriate object type, but when I put id a = [allObjects objectAtIndex:0]; if ([a isKindOfClass:[TopClass class]]) { int i; i = [a getVal]; } I get firstly a warning about multiple methods called getVal (presumably because the compiler can't determine the actual object type until runtime). But more seriously I also get an error "void value not ignored as it should be" and it won't compile. If I don't try and use the return from [a getVal] then it compiles fine e.g. [a getval]; //obviously no good if I want to use the return value It will also work if I use isMemberOfClass statements to cast the object to a class before running the function e.g. if ([a isMemberOfClass:[BotClass]) i = [(BotClass*) a getVal]; But surely I shouldn't have to do this to get the functionality I require? Otherwise I'll have to put in a statement for every single subclass, and worse have to add a new line if I add a new sub class, which rather defeats the point of method overriding doesn't it? Surely there is a better way?

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  • My UITextView delegate method doesn't respond

    - by user611967
    Hi guys. I would like to start we that i'm not a very good english speaker, so excuse me if something is wrong. So I have this code header file : import @interface macViewController : UIViewController { UINavigationItem *navItem; UITextView *iTextView; } @property (nonatomic, retain) IBOutlet UINavigationItem *navItem; @property (nonatomic, retain) IBOutlet UITextView *iTextView; (IBAction) btnClicked; @end implementation file : import "macViewController.h" @implementation macViewController @synthesize navItem, iTextView; (IBAction) btnClicked { if (self.editing == YES) { self.editing = NO; [iTextView resignFirstResponder]; UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Data Saved" message:@"Your data was saved" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil]; [alert show]; } else { self.editing = YES; [iTextView becomeFirstResponder]; } NSLog(@"works"); self.navItem.rightBarButtonItem = self.editButtonItem; self.navItem.rightBarButtonItem.action = @selector(btnClicked); } (void) textViewDidChangeUITextView *)textView { NSLog(@"works"); } So like you guess it's a view based app wich when i tap Edit button the keyboard pops-up then i press Done button and keyboard disappear and appear a alert view. SO I WANTED TO MAKE THEN I TOUCH THE TEXTVIEW, EDIT BUTTON TO BECOME DONE BUTTON ... THE PROBLEM IS THAT THE METHOD I DELEGATE TO IT DOESN'T RESPOND ... (USING CONSOLE I SAW THAT NOTHING HAPPENS) ... I TRIED DIFFERENT CODE BUT ALL = 0 ... PLEASE HELP I'M NEW ...

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  • Empty value when iterating a dictionary with .iteritems() method

    - by ptpatil
    I am having some weird trouble with dictionaries, I am trying to iterate pairs from a dictionary to pass to another function. The loop for the iterator though for some reason always returns empty values. Here is the code: def LinktoCentral(self, linkmethod): if linkmethod == 'sim': linkworker = Linker.SimilarityLinker() matchlist = [] for k,v in self.ToBeMatchedTable.iteritems(): matchlist.append(k, linkworker.GetBestMatch(v, self.CentralDataTable.items())) Now if I insert a print line above the for loop: matchlist = [] print self.ToBeMatchedTable.items() for k,v in self.ToBeMatchedTable.iteritems(): matchlist.append(k, linkworker.GetBestMatch(v, self.CentralDataTable.items())) I get the data that is supposed to be in the dictionary printed out. The values of the dictionary are list objects. An example tuple I get from the dictionary when printing just above the for loop: >>> (1, ['AARP/United Health Care', '8002277789', 'PO Box 740819', 'Atlanta', 'GA', '30374-0819', 'Paper', '3676']) However, the for loop gives empty lists to the linkworker.GetBestMatch method. If I put a print line just below the for loop, here is what I get: Code: matchlist = [] for k,v in self.ToBeMatchedTable.iteritems(): print self.ToBeMatchedTable.items() matchlist.append(k, linkworker.GetBestMatch(v, self.CentralDataTable.items())) ## Place holder for line to send match list to display window return matchlist Result of first iteration: >>> (0, ['', '', '', '', '', '', '', '']) I literally have no idea whats going on, there is nothing else going on while this loop is executed. Any stupid mistakes I made?

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  • Undefined method 'size' for #<File:text.txt> (NoMethodError)

    - by user1354456
    This is the code I am running, it does fine until I get to line 15. The command I run is: ruby ex16.rb text.txt. This is a practice sample I'm writing which is meant to be a simple little text editor: filename = ARGV.first script = $0 puts "We're going to erase #{filename}." puts "if you don't want that, hit CTRL-C (^C)." puts "If you do want that, hit RETURN." print "? " STDIN.gets puts "Opening the file..." target = File.open(filename, 'w') puts "Truncating the file. Goodbye!" target.truncate(target.size) puts "Now I'm going to ask you for three lines." print "line 1: "; line1 = STDIN.gets.chomp() print "line 2: "; line2 = STDIN.gets.chomp() print "line 3: "; line3 = STDIN.gets.chomp()undefined method 'size' puts "I'm going to write these to the file." target.write(line1) target.write("\n") target.write(line2) target.write("\n") target.write(line3) target.write("\n") puts "And finally, we close it." target.close()

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  • Can one draw a cube using different method/drawing mode?

    - by den-javamaniac
    Hi. I've just started learning gamedev (in particular android EGL based) and have ran over a code from Pro Android Games 2 that looks as follows: /* * Copyright (C) 2007 Google Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package opengl.scenes.cubes; import java.nio.ByteBuffer; import java.nio.ByteOrder; import java.nio.IntBuffer; import javax.microedition.khronos.opengles.GL10; public class Cube { public Cube(){ int one = 0x10000; int vertices[] = { -one, -one, -one, one, -one, -one, one, one, -one, -one, one, -one, -one, -one, one, one, -one, one, one, one, one, -one, one, one, }; int colors[] = { 0, 0, 0, one, one, 0, 0, one, one, one, 0, one, 0, one, 0, one, 0, 0, one, one, one, 0, one, one, one, one, one, one, 0, one, one, one, }; byte indices[] = { 0, 4, 5, 0, 5, 1, 1, 5, 6, 1, 6, 2, 2, 6, 7, 2, 7, 3, 3, 7, 4, 3, 4, 0, 4, 7, 6, 4, 6, 5, 3, 0, 1, 3, 1, 2 }; // Buffers to be passed to gl*Pointer() functions // must be direct, i.e., they must be placed on the // native heap where the garbage collector cannot vbb.asIntBuffer() // move them. // // Buffers with multi-byte datatypes (e.g., short, int, float) // must have their byte order set to native order ByteBuffer vbb = ByteBuffer.allocateDirect(vertices.length*4); vbb.order(ByteOrder.nativeOrder()); mVertexBuffer = vbb.asIntBuffer(); mVertexBuffer.put(vertices); mVertexBuffer.position(0); ByteBuffer cbb = ByteBuffer.allocateDirect(colors.length*4); cbb.order(ByteOrder.nativeOrder()); mColorBuffer = cbb.asIntBuffer(); mColorBuffer.put(colors); mColorBuffer.position(0); mIndexBuffer = ByteBuffer.allocateDirect(indices.length); mIndexBuffer.put(indices); mIndexBuffer.position(0); } public void draw(GL10 gl) { gl.glFrontFace(GL10.GL_CW); gl.glVertexPointer(3, GL10.GL_FIXED, 0, mVertexBuffer); gl.glColorPointer(4, GL10.GL_FIXED, 0, mColorBuffer); gl.glDrawElements(GL10.GL_TRIANGLES, 36, GL10.GL_UNSIGNED_BYTE, mIndexBuffer); } private IntBuffer mVertexBuffer; private IntBuffer mColorBuffer; private ByteBuffer mIndexBuffer;} So it suggests to draw a cube using triangles. My question is: can I draw the same cube using GL_TPOLYGON? If so, isn't that an easier/more understandable way to do things?

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  • Correct syntax in stored procedure and method using MsSqlProvider.ExecProcedure? [migrated]

    - by Dudi
    I have problem with ASP.net and database prcedure My procedure in mssql base USE [dbase] GO SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO ALTER PROCEDURE [dbo].[top1000] @Published datetime output, @Title nvarchar(100) output, @Url nvarchar(1000) output, @Count INT output AS SET @Published = (SELECT TOP 1000 dbo.vst_download_files.dfl_date_public FROM dbo.vst_download_files ORDER BY dbo.vst_download_files.dfl_download_count DESC ) SET @Title = (SELECT TOP 1000 dbo.vst_download_files.dfl_name FROM dbo.vst_download_files ORDER BY dbo.vst_download_files.dfl_download_count DESC) SET @Url = (SELECT TOP 1000 dbo.vst_download_files.dfl_source_url FROM dbo.vst_download_files ORDER BY dbo.vst_download_files.dfl_download_count DESC) SET @Count = (SELECT TOP 1000 dbo.vst_download_files.dfl_download_count FROM dbo.vst_download_files ORDER BY dbo.vst_download_files.dfl_download_count DESC) And my proceduer in website project public static void Top1000() { List<DownloadFile> List = new List<DownloadFile>(); SqlDataReader dbReader; SqlParameter published = new SqlParameter("@Published", SqlDbType.DateTime2); published.Direction = ParameterDirection.Output; SqlParameter title = new SqlParameter("@Title", SqlDbType.NVarChar); title.Direction = ParameterDirection.Output; SqlParameter url = new SqlParameter("@Url", SqlDbType.NVarChar); url.Direction = ParameterDirection.Output; SqlParameter count = new SqlParameter("@Count", SqlDbType.Int); count.Direction = ParameterDirection.Output; SqlParameter[] parm = {published, title, count}; dbReader = MsSqlProvider.ExecProcedure("top1000", parm); try { while (dbReader.Read()) { DownloadFile df = new DownloadFile(); //df.AddDate = dbReader["dfl_date_public"]; df.Name = dbReader["dlf_name"].ToString(); df.SourceUrl = dbReader["dlf_source_url"].ToString(); df.DownloadCount = Convert.ToInt32(dbReader["dlf_download_count"]); List.Add(df); } XmlDocument top1000Xml = new XmlDocument(); XmlNode XMLNode = top1000Xml.CreateElement("products"); foreach (DownloadFile df in List) { XmlNode productNode = top1000Xml.CreateElement("product"); XmlNode publishedNode = top1000Xml.CreateElement("published"); publishedNode.InnerText = "data dodania"; XMLNode.AppendChild(publishedNode); XmlNode titleNode = top1000Xml.CreateElement("title"); titleNode.InnerText = df.Name; XMLNode.AppendChild(titleNode); } top1000Xml.AppendChild(XMLNode); top1000Xml.Save("\\pages\\test.xml"); } catch { } finally { dbReader.Close(); } } And if I made to MsSqlProvider.ExecProcedure("top1000", parm); I got String[1]: property Size has invalid size of 0. Where I shoudl look for solution? Procedure or method?

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  • What skills should a developer/tester learn in order to move into a permanent Systems Analysis role?

    - by shenaz
    I have been with a software services firm for 5 years and have fallen into a "jack of all trades" role, which I am looking to move out of. I've spent about 1 year each in programming (VB/VB.NET), application support, systems analysis, and most recently, software testing, which in my current position is all manual. I've really lost interest in the programming and testing roles; I would prefer a position where I get to work more with people, such as systems analysis. I even got a chance to be a trainer at the same company for a few months, a temporary position which I enjoyed very much. Given that most of my real experience is with software, support, and testing, what knowledge areas and skills should I focus on learning and mastering in order to make myself an attractive candidate for a permanent position as a business/systems analyst?

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  • What is the best practice to move sprites using mouse order in Tile games?

    - by Robin-Hood
    I am trying to make my first Tile-game using XNA. I have no problem drawing the map layers using TiledLib from codeplex, but, now I want to give sprite an (order) to move to a specific position on map, by selecting the sprite (left mouse click) and then right mouse click somewhere on the map to specify the target position. I don’t know what is the best practice to move sprite this way, considering that there may be collision objects in the direct path. what is the best practice to do this? Is there any demo covering this issue? thanks. BTW: I couldn’t upload snapshot because of my low score :(

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  • What resources will help me understand the data model for QC 10.0 in order to write my SQL queries?

    - by srihari
    I am a fresher in Quality Center 10.0 HP software testing tool. As per my understanding in order to generate reports from QC and to troubleshoot the scenarios, we need to write SQL queries in the QC back end database. In my case it is SQL db. I downloaded the database reference help file but I could not understand from where I can start. It just gave the table name and its information. For a starter like me are there any online tutorials or helpful websites,hands on exercises,scenario's where I can better understand how to write queries for the QC data model? I am very confident about the SQL coding itself, what I want to know is how to query on the QC database tables based on the scenarios that occur in QC tool. Please suggest. Thanks, Srihari

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  • Ubuntu: how to change the right click "open with" application order?

    - by ramgorur
    I am using Ubuntu 10.10 Maverick, when I try to open a plain text file using a program x, I do right click to access the "open with" application list. Suppose my current "open with" list is like below -- application z application y application x But I want it to be like -- application x application y application z i.e. I want to change the order of the list. I know that I can fix a "default program" for a particular file, but that's not what I am looking for. My question is which file defines this "open with" preferences? and if there is any way to tweak it. Any idea?

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  • What are the most common stumbling blocks when it comes to learning programming, in order of difficulty?

    - by blueberryfields
    I seem to remember that linked lists, recursion, pointers, and memory management are all good examples of stumbling blocks - places where the aspiring programmer typically ends up spending significant time trying to understand a concept before moving on and improving, and many end up giving up and not improving. I'm looking for a complete/comprehensive list of these types of stumbling blocks, in rough estimated order of difficulty to learn, with the goal of making sure that an educational program for programmers is structured to properly guide students through them Is this information available somewhere? Ideally, the difficulty to learn will be measured in some sort of objective manner (ie, % of students which consistently fail to learn the concept) What sources are most appropriate for obtaining this information?

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  • Is it a good idea to use a formula to balance a game's complexity, in order to keep players in constant flow?

    - by user1107412
    I read a lot about Flow theory and its applications to video games, and I got an idea sticking in my mind. If a number of weight values are applied to different parameters of a certain game level (i.e. the size of the level, the number of enemies, their overal strength, the variance in their behavior, etc), then it should be technically possible to find an overal score mechanism for each level in the game. If a constant ratio of complexity increase were empirically defined, for instance 1,3333, or say, the Golden Ratio, would it be a good idea to arrange the levels in such an order that the increase of overal complexity tends to increase that much? Has somebody tried it?

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  • How should I sort images in an isometric game so that they appear in the correct order?

    - by Andrew
    This seems like a rather simple problem but I am having a lot of difficulty with it. What should I do to properly sort images in an isometric game? In a normal 2d top-down game one could use the screen y axis to sort the images. In this example the trees are properly sorted but the isometric walls are not. Example image: sorted by screen y Wall2 is one pixel below wall1 therefore it is drawn after wall1. If I sort by the isometric y axis the walls appear in the correct order but the trees do not. Example image: sorted by isometric y

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  • How should I sort images in an isometric game so that they appear in the correct order?

    - by Andrew
    Hi! This seems like a rather simple problem but I am having a lot of difficulty with it. What should I do to properly sort images in an isometric game? In a normal 2d top-down game one could use the screen y axis to sort the images. In this example the trees are properly sorted but the isometric walls are not. Example image: sorted by screen y Wall2 is one pixel below wall1 therefore it is drawn after wall1. If I sort by the isometric y axis the walls appear in the correct order but the trees do not. Example image: sorted by isometric y

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  • How and what setting do you use in order to create your customized application with database? [closed]

    - by FullmetalBoy
    I have a homemade project combining with application and database. Today I'm using architecture N-tier. Totally I have 4 project in my solution in VS2010. The fourth project is a transaction layer that connect all the 3 project (one for presentation, business logic and database layer) in order to retrieve data from the database and all the way to present the data in presentation layer. Transaction layer contains entity framework 4 + customized class to carry data to the presentation layer. I always use LINQ to retrieve data in database layer. From my experience, everytime I use LINQ in relation with entity framework it always take a lot of time to retrieve data because what I believe is that my entity framework always has to reload everytime when I want to retrieve any data from the database. My question for you guys is: When you create your application connecting to a database, what architecture do you use? How do you retrieve the data from you application? Is it entity framework etc?

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  • What is the order of diagram drawing in a design?

    - by Manuel Malagon
    I'm new with OOP and UML and I have some confusion here. I'd like to know where to start, I mean, somebody comes to you and ask you to do something (involves software design of course), once you have determined what has to be done, what is the order in which you have to start the software architecture? I mean, is it first the use case diagram or the class diagram? or should I draw some diagrams in parallel? But basically, where should I start? and what UML diagram goes first? Thanks for helping!!

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  • How to fix “Install-SPSolution: Admin SVC must be running in order to create deployment timer job”

    - by ybbest
    When I try to install a SharePoint Solution using PowerShell, I got the error “How to fix Install-SPSolution: Admin SVC must be running in order to create deployment timer job”. The reason you got error is that SharePoint 2010 Administration is not started, so to fix it you just need to start the services. Problem: Solution: To fix the issues, you need to start the SharePoint 2010 Administration service. 1. Go to services control panel. 2. Start the SharePoint 2010 Administration service. 3. Rerun your PowerShell, it should fix the problem. However, you might get another problem “A deployment or retraction is already under way for the solution “*.wsp”, and only one deployment or retraction at a time is supported”, for this problem you can check my other blog here.

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  • WPF-Prism CanExecute method not being called

    - by nareshbhatia
    I am coding a simple login UserControl with two TextBoxes (Username and Password) and a Login button. I want the Login button to be enabled only when the username and password fields are filled in. I am using Prism and MVVM. The LoginViewModel contains a property called LoginCommand that is bound to the Login button. I have a CanLoginExecute() method in my ViewModel but it fires only when the application comes up and then never again. So the Login button is never enabled. What am I missing? Here's my xaml: <TextBox x:Name="username" Text="{Binding Path=Username, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True}" /> <TextBox x:Name="password" Text="{Binding Path=Password, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True}" /> <Button Content="Login" cmnd:Click.Command="{Binding LoginCommand}" /> Here's my ViewModel class LoginViewModel : IDataErrorInfo, INotifyPropertyChanged { public LoginViewModel() { this.LoginCommand = new DelegateCommand<object>( this.LoginExecute, this.CanLoginExecute); } private Boolean CanLoginExecute(object dummyObject) { return (string.IsNullOrEmpty(Username) || string.IsNullOrEmpty(Password)) ? false : true; } private void LoginExecute(object dummyObject) { if (CheckCredentials(Username, Password)) { .... } } #region IDataErrorInfo Members public string Error { get { throw new NotImplementedException(); } } public string this[string columnName] { get { string result = null; if (columnName == "Username") { if (string.IsNullOrEmpty(Username)) result = "Please enter a username"; } else if (columnName == "Password") { if (string.IsNullOrEmpty(Password)) result = "Please enter a password"; } return result; } } #endregion // IDataErrorInfo Members #region INotifyPropertyChanged Members public event PropertyChangedEventHandler PropertyChanged; void OnPropertyChanged(string propertyName) { if (PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs(propertyName)); } #endregion // INotifyPropertyChanged Members #region Properties private String _username; public String Username { get { return _username; } set { if (value == _username) return; _username = value; this.OnPropertyChanged("Username"); } } private String _password; public String Password { get { return _password; } set { if (value == _password) return; _password = value; this.OnPropertyChanged("Password"); } } public ICommand LoginCommand { get; private set; } #endregion // Properties }

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