How can I prevent a DLL from causing problems when it is used more than once?

How can I prevent a DLL from causing problems when it is used more than once?

By : Cheng Zhenyu
Date : November 22 2020, 10:38 AM
will help you Symbol Motorola Zebra is building on a legacy C++ library with a legacy .NET wrapper. There are quite some pitfalls (some events require re-attaching each time they occur, some classes require explicit Close() before you Dispose() them, etc).
As you may have found out, you can invoke members of the Symbol classes from multiple threads / forms, but you can't have two (foreground) readers enabled, and some properties can only be set if no background readers are enabled, and there is no way to determine whether there are background readers enabled (ie DataWedge).
code :

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WM_QUERYENDSESSION is causing me problems

WM_QUERYENDSESSION is causing me problems

By : shibin
Date : March 29 2020, 07:55 AM
Any of those help Making a simple application, so when the user logs out of Windows, it of course shuts the application down. We are making a simple USB Alert application which STOPS shutdown if a USB is detected when the user is logging off , Have you tried
code :
[DllImport("advapi32.dll", SetLastError=true)]
static extern bool AbortSystemShutdown(string lpMachineName);
Classes.dex Causing problems

Classes.dex Causing problems

By : Domingos Soares
Date : March 29 2020, 07:55 AM
Hope this helps Disabling Kaspersky security seems to work for me. The steps I followed were:
Close the emulator, eclipse, and all other windows related to the Android environment. Disconnect from the internet (because I'm paranoid, maybe, and don't want to be connected to the net when I turn off Kaspersky protection). Turn off Kaspersky protection (your system, at this point, will start shouting all sorts of curses at you for turning off its protection and leaving it vulnerable). Run eclipse and start the emulator before doing anything else. Make changes to your code and continue testing your app using the emulator normally (now, the 'getting stuck at launching 100%' problem should stop). If you need the internet/if you need to enable Kaspersky then close the emulator, eclipse, et al. Turn on Kaspersky - acknowledge your system's sigh of relief ;) Connect to the internet and continue browsing.
Google API Changes causing problems on my App

Google API Changes causing problems on my App

By : He-Man
Date : March 29 2020, 07:55 AM
seems to work fine For the first issue, the reason why it got resolved by using [id].apps.googleusercontext.com is because it it requesting an authorization token from an app to the server, as opposed to a Server to Server transaction using impersonation ([id]@developer.gserviceaccount.com). This is the right solution for both android and IOS apps requesting a token.
As for your second question, the best way to keep up to date with the latest changes is through their official blog: http://googleappsdeveloper.blogspot.com/
Pandas dataframe index causing problems when indexing subset of dataframe. How do I remove the indexes, or prevent the e

Pandas dataframe index causing problems when indexing subset of dataframe. How do I remove the indexes, or prevent the e

By : JJG
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , I think looping is best avoid in pandas, because very slow if exist some vectorized solution:
code :
x1_sub  = ['service', 'claim', 'health', 'fund', 'premium', 'nice', 'process']

x2 = x1[x1['word'].isin(x1_sub)]
print (x2)
       word  score
0   service      1
5     claim      2
15   health      5
17     fund      4
22  premium      1
26     nice      3
How to prevent strong reference cycles when using Apple's new Combine framework (.assign is causing problems)

How to prevent strong reference cycles when using Apple's new Combine framework (.assign is causing problems)

By : Attomic Kitties
Date : October 02 2020, 08:00 AM
Does that help you can replace .asign(to:) with sink where [weak self] in its closure brake the memory cycle. Try it in Playground to see the difference
code :
final class Bar: ObservableObject {
    @Published var input: String = ""
    @Published var output: String = ""

    private var subscription: AnyCancellable?

    init() {
        subscription = $input
            .filter { $0.count > 0 }
            .map { "\($0) World!" }
            //.assignNoRetain(to: \.output, on: self)
            .sink { [weak self] (value) in
                self?.output = value


    deinit {
        print("\(self): \(#function)")

// test it!!
var bar: Bar? = Bar()
let foo = bar?.$output.sink { print($0) }
bar?.input = "Hello"
bar?.input = "Goodby,"
bar = nil
Hello World!
Goodby, World!
__lldb_expr_4.Bar: deinit
extension Publisher where Self.Failure == Never {
    public func assignNoRetain<Root>(to keyPath: ReferenceWritableKeyPath<Root, Self.Output>, on object: Root) -> AnyCancellable where Root: AnyObject {
        sink { [weak object] (value) in
        object?[keyPath: keyPath] = value
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