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Welcome to Software Development on Codidact!

Will you help us build our independent community of developers helping developers? We're small and trying to grow. We welcome questions about all aspects of software development, from design to code to QA and more. Got questions? Got answers? Got code you'd like someone to review? Please join us.

Posts by mr Tsjolder‭

17 posts
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Q&A How to use function composition for applying a function to first elements of a list?

Can anyone explain to me why my Haskell function gives rise to a type-definition error? Originally, I wrote the following function to subtract one from the first n elements in a list: dec_first :...

2 answers  ·  posted 10mo ago by mr Tsjolder‭  ·  last activity 10mo ago by mauke‭

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Q&A How to move a tag in git?

I have created a tag in my project, using git tag v2023 However, I forgot to commit a few changes. Now I would like to move this tag to the current point (after having committed the changes I had...

1 answer  ·  posted 10mo ago by mr Tsjolder‭  ·  edited 8mo ago by meta user‭

Question git version-control
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Q&A How can I properly type-hint methods in different files that would lead to circular imports?

I am writing a Python package where I have two classes in different files that (indirectly) depend on each other. If I wouldn't care about type-hints, there would be no problem, but unfortunately,...

2 answers  ·  posted 9mo ago by mr Tsjolder‭  ·  edited 9mo ago by Alexei‭

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Q&A Readable syntax for executing many callables with useful side effects

The map operation is a typical concept from the functional programming paradigm. However, side-effects are a typical example of something that does not fit functional programming well. As a resul...

posted 9mo ago by mr Tsjolder‭

Answer
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Meta Should we disallow ChatGPT-User crawler (and others) from scraping Software Codidact?

A few thoughts from my side (as a ML researcher, without experience in LLMs): I am not sure if it is really useful to block ChatGPT specifically. ChatGPT is only one of many LLMs out there. ...

posted 9mo ago by mr Tsjolder‭  ·  edited 9mo ago by mr Tsjolder‭

Answer
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+4 −0
Q&A Slicing a dictionary using a string variable

Assuming that dynamicmodel and uncertainlibrary are just (nested) dictionaries and value = '["SCD"]["CL0"]' is actually supposed to be a string (note the single quotes here), your code would at...

posted 10mo ago by mr Tsjolder‭

Answer
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+4 −0
Q&A How can I properly type-hint methods in different files that would lead to circular imports?

I eventually also found out that the typing module has a global variable TYPE_CHECKING that can be used to only import during type-checking. Concretely, the following code for helpers.py seems to ...

posted 9mo ago by mr Tsjolder‭

Answer
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Q&A When to use custom iterators versus pointers

I am working on a toy project where I have a container for which I would like to write an iterator that iterates over the values in the container. Because the values are stored in a (c-style) arra...

1 answer  ·  posted 21d ago by mr Tsjolder‭  ·  last activity 10d ago by Angew‭

Question c++ iterator
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Q&A How to resolve a "ValueError: dimension 't' already exists as a scalar variable" arising when I am using xarray.Dataset.assign_coords()?

It seems like what you want to do can be achieved by using data.assign_coords(t=[0.123]) The error message is extremely confusing in this respect, but it seems like the new value for the coordi...

posted 9mo ago by mr Tsjolder‭

Answer
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Meta Are questions about (abstract) algorithms and datastructures considered on-topic?

I just noticed this question about data structures in the Q&A. Although algorithms and data structures are often (part of) a solution to a problem when writing software, this question is const...

1 answer  ·  posted 8mo ago by mr Tsjolder‭  ·  last activity 8mo ago by Karl Knechtel‭

Question discussion scope
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Q&A Regex for simplifying Amazon product URLs

The following expression should capture the {dp|gp}/$ID part: https://www\.amazon\.com/([gd]p/[A-z0-9]{10}) A quick explanation: the \. are there to match periods only (otherwise it would ma...

posted 7mo ago by mr Tsjolder‭

Answer
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Q&A How to overwrite lines of STDOUT in Python?

You can use the carriage return control character "\r" to return to the beginning of the line and overwrite text. When using the print function you additionally have to make sure not to write the ...

posted 7mo ago by mr Tsjolder‭

Answer
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+5 −1
Meta How can we grow this community?

After a few years of casually using stack-exchange sites and wandering around on coda-dict, I feel there are mainly three components to the quality of the content on each of these sites: the kno...

posted 10mo ago by mr Tsjolder‭

Answer
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Q&A Listen for key events in a CLI app

First of all, the standard keystroke for interrupting a CLI program would be ctrl + C or whatever the windows equivalent is. Therefore, you will get the most consistent user experience if you use ...

posted 8mo ago by mr Tsjolder‭  ·  edited 8mo ago by mr Tsjolder‭

Answer
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+1 −0
Meta Should self-answered Q&A use separate answers for different techniques/approaches (even if there's a caveat that applies overall)?

I believe one of the main strengths of Q&A websites is that they provide a more digestible alternative to dense documentation. Especially for programmers who do not yet know how to find/use th...

posted 8mo ago by mr Tsjolder‭

Answer
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Q&A How to compress columns of dataframe by function

Since pandas uses numpy for these computations under the hood, I would have suggested to use df.mean(keepdims=True), but apparently this has been explicitly disabled by pandas. However, after look...

posted 9mo ago by mr Tsjolder‭  ·  edited 9mo ago by mr Tsjolder‭

Answer
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Q&A Best practices to write functions for both execution modes in Tensorflow, eager and graph mode

Tensorflow functions should typically work on both eager and graph tensors. This means that you can just use the following implementation: def lin_to_db(x: float | tf.Tensor) -> tf.Tensor: ...

posted 8mo ago by mr Tsjolder‭

Answer