handle

If I declare an object to be a subclass of handle classdef obj < handle my object is now essentially a "pointer" to some memory somewhere. How do I find out how much memory my object is using up? For example, say I have a class foo with a field bar classdef foo < handle properties bar = randn(1000); end bar takes up 8 megabytes (8 bytes * 1 million numbers) but if I type obj = foo(); whos('obj'); I get Name Size Bytes Class Attributes obj 1x1 60 foo How do I find out how much total memory obj points to? As a hack, convert it to a struct and see how much space that takes up. I think that will

Suppose I have two hanldes: HANDLE h1; HANDLE h2; And both have received values resulted from some Windows API function - in particular, I'm interesed in handles resulted from calls to CreateFile() . How do I determine that h1 and h2 reference the same underlying object - in the case of CreateFile() - same file, directory or device? Is there some API to determine that? You could use GetFinalPathNameByHandle and compare the file path of both handles. https://msdn.microsoft.com/en-us/library/windows/desktop/aa364962(v=vs.85).aspx IInspectable The GetFileInformationByHandle API returns

I have a handle class: classdef A<handle properties a; end methods function obj = A(a) obj.a=a; end end end And I have a cell array of A objects: arr={}; for i=1:3 arr{i}=A(i); end What I would like to do is pass that cell array to a parfor loop so that each object's value will change: parfor i=1:3 arr{i}.a=i*5; end However, this code does not change arr at all. Indeed, here it states that Changes made to handle classes on the workers during loop iterations are not automatically propagated to the client. How can I overcome this? An interesting question; I actually never encountered this

I am kinda stuck here. I have tried to read and implement some simple continuous slider scripts, ( like this one ), but I am not getting anywhere. What I simply want to go, is use the continuous slider value in my plot, as I slide the slider. However, I cannot figure out how to extract the value of the slider to do so. So for example, make a continuous slider, and then use it to change the amplitude of a vector lets say, as you continuously slide it. How can that be done? Thanks. Something like this? function sliderDemo f = figure(1); %// Some simple to plot function (with tuneable parameter)

I'm developing a web application, and I need something like this: url(r'^$', 'collection.views.home', name='home'), url(r'^$', 'collection.views.main', name='main'), If the user is authenticated, go to main, otherwise go to home. On the home page, differently there will be a sign in a button. But these should be on the same URL pattern. How can I handle it? To handle that kind of thing you can use a single view that follows different code paths depending on the request state. That can mean something simple like setting a context variable to activate a sign in button, or something as complex