Having an index for every sub-directory will ease navigation around the repository. Here is the structure I think will do good

- Data Structures
   - array
      - index.md
   - stack
      - index.md

and so on.

Please feel free to suggest improvements anywhere you feel like and contribute 😃

At present, Discovery message fields are accessed using .unwrap() once they've been verified to be present and valid. This makes the code look uglier and riskier than it really is or needs to be. A better solution would be to convert verified messages into an alternate type which provides accessors that don't unwrap, along the following lines:

`fn verify_message(raw_discovery_msg: bytes) -> R

Environment

• Tesseract Version: 4.0.0
• Commit Number: N/A
• Platform: Fedora Rawhide

Current Behavior:

If you have the tessdata_fast data - which is what most distros seem to ship - and you try to use the old engine, you get something like this:

<mock-chroot> sh-4.4# tesseract --oem 0 data/bootmenu-ocr.ref.png testoutput
Failed loading language 'eng'

Support for storing large tensor values in external files was introduced in #678, but AFAICT is undocumented.

This is a pretty important feature, functionally, but it's also important for end users who may not realise that they need to move around more than just the *.onnx file.

I would suggest it should be documented in IR.md, and perhaps there are other locations from which it could be s

The following do not yet have any pytests:

• boolean_algebra
• digital_image_processing
• divide_and_conquer
• hashes
• linear_algebra #1124
• networking_flow #1126
• traversals
• file_transfer_protocol # This might be difficult
• machine_learning
• neural_network

For ease of review, please only modify one directory per pull request.