exploiting | Exploiting challenges in Linux and Windows | Hacking library

You need to include a sort callback function. This function takes 2 arguments, call them a and b. This callback function can make use of string::localeCompare

Why do you expect p.Character to be anything but nil?

From the Roblox manual:

Character

... Initially, this property is nil then set when the player’s character first spawns. Use the Player.CharacterAdded event to detect when a player’s character properly loads

When a player is added it does not have a Character yet. Also running that in an infinite loop that never breaks, even after the player has been kicked doesn't make too much sense to me.

However, it seems not all called methods have symbol information in Roslyn.

This probably indicates that something went wrong with how you got your Compilation, and you should attempt to investigate that directly. Don't attempt to deal with it downstream. (Software: garbage in, garbage out!)

On the other hand System.Net.WebRequest.Create() or System.Diagnostics.Process.Start() do not. How do I get System.Net.WebRequest or System.Dignostics.Process from those nodes? I can clearly see them using QuickWatch.

Keep in mind that from the perspective of syntax only, System.Net.WebRequest.Create() could be:

• A Create method on the WebRequest type that's in System.Net
• A Create method on on the WebRequest type, which is a nested class of the Net type, in the System namespace
• A Create method on the WebRequest type that's in MyApp.System.Net.WebRequest, because we of course don't require fully namespace names and if you decide to make a System namespace inside your MyApp, that could potentially work!

One thing I did come to realize is that System Diagnostics isn't part of the mscorlib. Could that be why the symbol information is missing?

Yep; we're only going to reference the assemblies you give us. It's up to you to know your context and if other references are included in what that code can reference, then you should include them in your production of the Compilation.

I pushed for a blacklist, which would be easy enough to do with a simple string search of the code. They want a whitelist which requires full out parsing of the symbols.

From a security perspective they may be right -- it's very difficult to block from a string search. See some thoughts at https://stackoverflow.com/a/66555319/972216 for how difficult that can be.

SOLUTION

Instead of using Utilities.sleep(1000), use a custom async await function.

FINDINGS - TLDR

I have tried quite a few things, including building an exponential backoff solution, as suggested by Matteo Randwolf in the comments, which eventually offered a solution, but only through many failed attempts. So it does the job, but jsut bypasses the original issue.

In the meantime, however, I also realised the following:

• Fail/Error messages are returned by GmailApp.sendEmail() typically when the script sends a draft from the user's inbox, which has large attachments. (The error still reads as per the original post, Exception: Service invoked too many times in a short time: premium gmail expensive rateMax., but it doesn't seem to be time triggered. In comparison, the same script working with the same number of recipients but with message bodies that include very small texts completes without any issues.
• Messages are sometimes actually sent, despite the Fail/Error feedback. There seems to be some miscommunication within GAS, which results in the wrong status message sent back on execution.
• Utilities.sleep(1000) (or 2000 or 4000 for that matter) just doesn't work in this case. Logs and visual feedback prove that it doesn't stop the execution of the script, even though I included both that and a SpreadsheetApp.flush() function within each iteration, right after each other.
• The only thing that actually works is swapping Utilities.sleep() to an async await function as below.

FUNCTION TO USE INSTEAD OF Utilities.sleep(1000)

• Make your function an async function()
• Instead of Utilities.sleep(), call a custom sleep function sleep() as below

Sleep function that works:

To answer your questions:

Each worker process created by the Pool.map() needs to execute the instance method self.do_thing(). In order to do that Python pickles the instance and passes it to the subprocess (which unpickles it). If each instance has a Manager it will be a problem because they're not pickleable. Part of the unpickling process involves importing the module that defines the class and restoring the instance's attributes (which were also pickled).

You can avoid the problem by having the class create its own class-level Manager (shared by all instances of the class). Here the __init__() method creates the manager class attribute the first time an instance is created and from that point on, further instances will reuse this it — it's sometimes called "lazy initialization"

You can't do it like this.

The problem is that your showInts has to traverse the list twice, first to find the longest number, second to print the numbers with the necessary format. That means the list has to be held in memory between the first and second passes. This isn't a problem with unevaluated thunks; it is simply that the whole list, completely evaluated, is being traversed twice.

The only solution is to generate the same list twice. In this case it is trivial; just have two [0..10^7] values, one for the maximum length and the second to format them. I suspect in your real application you are reading them from a file or something, in which case you need to read the file twice.

So I implemented a make-shift solution getting ideas from this post.

I collected a distinct list of the Seq_keys and then manually for-looped through each one and applied the pyspark kmeans method like so:

I don't know if I fully understood, but if you want keep the ratio 10:1 but keep the view inside the parent, just change both layout_height and android:layout_width to 0dp, like so:

The problem here is that objects pointed by GraphicalObject* picture[2]; got static type GraphicalObject and static polymorphism uses static type.

But that doesn't mean static polymorphism isn't possible is similar situation. You would need a wrapper class which would know the actual type of stored object and would cast the pointer to it before calling the methods.