c# - I have a loop that initializes a list of objects with values, but as soon as it exits the loop the objects become identical -

-

as title suggests initializing objects in list through loop. become identical when loop exits. can see during loop not same. when loop exits change last object entered. 

public list<elevationlayout> layoutlist = new list<elevationlayout>();     public int layoutnumber { get; set; }     public int worldwidth { get; set; }      public random seed { get; set; }     public xysize dimleft { get; set; }   //i have narrowed down problem method     //==========================================================================================================================================================     //==========================================================================================================================================================     //==========================================================================================================================================================      public void init(world world) {         dimleft = new xysize();         elevationlayout layout = new elevationlayout();         dimleft.y = 0;         dimleft.x = world.size.x;         seed = new random((int)datetime.now.ticks);         worldwidth = (int)((world.size.x / 6.4) + (world.size.x / 64) - 1);         layoutnumber =  worldwidth + seed.next(-2, 3);         (int = 0; < layoutnumber; i++)         {             layout.type = seed.next(0, 2);             layout.width = (world.size.x / layoutnumber) + seed.next(0, ((dimleft.x / layoutnumber) / 2) + 1);              if (layout.width > dimleft.x)             {                 layout.width = dimleft.x;             }              dimleft.x -= layout.width;             layout.height = seed.next(world.size.y / 16, (world.size.y / 4) + 1);              if (layout.height > dimleft.y)             {                 layout.height = dimleft.y;             }               this.layoutlist.add(layout);             console.write(this.layoutlist[i].type); // here objects different              if ((world.size.y -= layout.height) > dimleft.y)             {                 dimleft.y = (world.size.y - layout.height);             }              if (dimleft.x <= 0)             {                 layoutnumber = i;             }         }         console.writeline();                 (int y = 0; y < layoutnumber; y++)                     console.write(this.layoutlist[y].type); //but exit loop same     }      //==============================================================================================================     //==============================================================================================================     //==============================================================================================================

someone had similar problem here: why list of objects same? , here: why values in list same?

initially list of objects static, have since removed , problem remains.

the problem create 1 instance of object before loop , set properties of 1 object. fix:

    (int = 0; < layoutnumber; i++)     {           elevationlayout layout = new elevationlayout();

basically create object inside loop, on every iteration allocate new object.


Comments

Post a Comment

Popular posts from this blog

c# - Unity IoC Lifetime per HttpRequest for UserStore -

-
i'm trying clean default implementation of accountcontroller.cs comes out of box in new mvc5/owin security implementation. have modified constructor this: private usermanager<applicationuser> usermanager; public accountcontroller(usermanager<applicationuser> usermanager) { this.usermanager = usermanager; } also, have created lifetime manager unity looks this: public class httpcontextlifetimemanager<t> : lifetimemanager, idisposable { private httpcontextbase _context = null; public httpcontextlifetimemanager() { _context = new httpcontextwrapper(httpcontext.current); } public httpcontextlifetimemanager(httpcontextbase context) { if (context == null) throw new argumentnullexception("context"); _context = context; } public void dispose() { this.removevalue(); } public override object get...
Read more

Change the color of an oval at click in Java AWT -

-
i have draw ovals in java, , @ click change color. beginning tried change color after 20 ms, doesn't work. my code is: public class mycomponentnew extends frame { public graphics2d g2d; public mycomponentnew(string title) { super(title); setsize(400, 550); } @override public void paint(graphics g) { this.g2d = (graphics2d) g; this.g2d.setcolor(color.red); this.g2d.filloval(10, 55, 50, 100); } public void changecolor () { this.g2d.setcolor(color.blue); this.g2d.filloval(10, 55, 50, 100); } } and in class main method have: mycomponentnew m; m = new mycomponentnew("fereastra cu baloane"); m.setvisible(true); m.addwindowlistener(new windowadapter() { @override public void windowclosing(windowevent we) { system.exit(0); } }); try { thread.sleep(20); } catch(interruptedexception e) {} m.changecolor(); the color of oval remains red. ...
Read more

I am trying to solve the error message 'incompatible ranks 0 and 1 in assignment' in a fortran 95 program. -

-
i writing program in fortran find velocity of parachuting person in relation time. keep getting error can't fix. new programming , appreciated. the error is v(i+1)=v(i)+[32-((c*v(i)*v(i))/m)]*(h) 1 error: incompatible ranks 0 , 1 in assignment @ (1) and program is program para integer :: real :: v(11) !velocity real :: q !initial velocity real :: h !time step real :: c !drag coefficient real :: m !mass ! gravity equal 32 ft/s^2 write (*,*)'enter time step' read(*,*)h write(*,*)'enter initial velocity' read(*,*)q write(*,*)'enter drag coefficient' read(*,*)c write(*,*)'enter mass' read(*,*)m i=1,10 ! 1 10, 1 being interval. end v(i+1)=v(i)+[32-((c*v(i)*v(i))/m)]*(h) q=v(1) end program you cannot use [] normal parenthesis in expressions. array constructor, [ items ] means array items elements. end do should after line.
Read more