stem | Python controller library for Tor | Router library

Everywhere I look, the "way" to "wrap" errors in Go is to use fmt.Errof with the %w verb

https://go.dev/blog/go1.13-errors

However, fmt.Errorf does not recursively wrap errors. There is no way to use it to wrap three previously defined errors (Err1, Err2, and Err3) and then check the result by using Is() and get true for each those three errors.

FINAL EDIT:

Thanks to @mkopriva's answer and comments below it, I now have a straightforward way to implement this (although, I am still curious if there is some standard type which does this). In the absence of an example, my attempts at creating one failed. The piece I was missing was adding an Is and As method to my type. Because the custom type needs to contain an error and a pointer to the next error, the custom Is and As methods allows us to compare the error contained in the custom type, rather than the custom type itself.

Here is a working example: https://go.dev/play/p/6BYGgIb728k

Highlights from the above link

Looking for a way to avoid duplication when creating different, flexible FSMs within single application.

I have a concept below, under the heading 0: BEFORE Requirements Change. This concept shows how FSMs of different products can be created, and how an FSM can run. Only one product's FSM can run on a station/computer at any given time, but one station can allow for multiple products (at different times). For context, this is a manufacturing environment, and there are many products which go through a scanning process. Some products have commonalities in their process, like Product A and B (set up batch for product -> scan a part -> apply business logic -> repeat for multiple parts until batch complete, label printed -> set up next batch...). But other products have different processes, like Product C. Products' processes can also require/include/exclude varying components (different devices, databases, business logic); this is all shown under 0: BEFORE Requirements Change.

Now, say the requirements change (which has happened multiple times in the past), and a new step is needed in-between existing steps for multiple products' FSMs (for example, need to trigger a camera and process the image). Furthermore, this additional step might be just a trial phase, and will need to be disabled. I'll now have to go and change every single FSMCreator, as shown under heading 1: AFTER Requirements Change. When there are many products (ALOT more than 3), big process changes like this have been error-prone and difficult to manage.

Is there a better/cleaner way of organizing the architecture or creating the FSMs, so that this duplication is avoided?

The problem stems from how different FSMs can share some common steps, or have some common components, but are not 100% the same. Essentially, there are many different mixing-and-matching variations of components (devices, databases, business logic), states, and transitions. Ultimately, it is the product's process that defines the FSM, so each product needs to know how to create its FSM. This is why I have a different FSMCreator class for each product, to handle the different processes per product. But as shown, this leads to duplication.

I have two sections of code that theoretically do the same thing:

I'm using p5js to turn some barnsley fern code into an object using the coding train's code.

I'm trying to animate it by changing one of the coefficients but I need the fern to at least render properly as an object first.

My issue is that the fern doesn't render correctly after I've ported the properties and methods into a barnsley fern object. The only thing that renders sometimes is the stem but none of the leaves do.

I've tried changing the order in the draw function, using a function factory approach and object literals but I keep getting the same result 😭

Here is the p5sketch so you can see

I am testing a web app and the test runs reliably in headed mode (cypress open) but has errors in headless mode (cypress run), so it's likely a race condition that I cannot resolve. The error message is:

[36819:0223/163815.745047:ERROR:system_services.cc(34)] SetApplicationIsDaemon: Error Domain=NSOSStatusErrorDomain Code=-50 "paramErr: error in user parameter list" (-50)

This error is mentioned again when Cypress creates a video of the incident:

I was wondering if someone knows a method that would allow me to push a data property into an array if a condition is met. For example, the code I'm using fetches data from an api. The data that I'm looking for specifically are the pictures. Here is my code:

I have a dataframe that I'd like to save using Arrow.write().

I can save a subframe of it by omitting one column. But if I leave the column in, I get this error:

ArgumentError: type does not have a definite number of fields

The objects in this column are all 4-Tuples, and their elements are all either empty Tuples or 1- or 2-Tuples of Int64s. Typical examples would be ((1), (), (2), ()) and ((1, 2), (), (), ()). If I use Arrays of Arrays rather than Tuples of Tuples, it works just fine. I prefer to use tuples, and I would prefer not to have to process data before writing and after reading it (note that this also rules out things like using four separate columns -- plus I suspect having 2-tuples and 1-tuples and empty tuples in the same column would produce the same error).

I don't really understand the meaning of the error here, so I'm not sure how to fix it. Is there an easy fix? Or do I need to use arrays instead?

Here is a minimal working example which gives me this error:

I've been running my component tests via cypress open-ct for a while now, relying on importing /node_modules/tailwindcss/dist/tailwindcss.min.css.

Since upgrading to Tailwind v3 some of my tests are failing as there is no prebuilt CSS file I can import - everything is generated just in time.

For example, testing if a modal closes when clicking on a overlay that is fixed and full width fails as the whole modal is rendered so that it is inaccessible by Cypress.

Another side-issue that stems from not having access to Tailwind classes is that videos recorded when running tests in CI are unusable as they are just a bunch of random native elements.

I've been importing Tailwind like this at the top of each Test file (before describes)

Currently it's possible to tell the compiler to ignore warnings from a given header by considering it a "system header", including the header via -isystem /path/to/dir.

However, this still won't work if the warning stems from a macro defined in such a header. Is there any way to ignore warnings also for macros? I'm mostly interested in GCC and Clang solutions.

Examples below are based on Clang 14.0.0 and GCC 11.1.0 on Ubuntu 20.04: