C# the solution is in the sample tests area and the sample tests are in the solution area

C#: titles of tests are really poor.

RISC-V Translation

Lua translation!

for testcase "Actual: 0, Expected: 1Nums: [1, 1, 1]" I get a wrong result even though in my own testing I get correct result

Nice kata! :)

I would suggest adding two more aspects to the tests:

1. some longer codes/messages, say > 150 characters, and
2. some codes/messages containing a wider range of characters, say all printable ASCII characters or at least some of the special characters highlighted in the instructions.

I think it's reasonable to expect a decoder to handle both, but currently it's possible to pass the tests with some solutions that can't ;)

I figured how the encryption works, got the dictionary and the formula but I have problems with long strings as my solution includes calculating 2^(positionInMessage)... which of course eventually leads to too big numbers. Is there a math trick to optimize that?

Description should be language-agnostic

Only one of the tests is failing and I can't seem to find any difference between my answer and the expected answers. Kinda frusturating but a fun puzzle:

The quick brown fox jumped over the lazy developer.

Test Passed
Log

The quick brown fox jumped over the lazy developer.

The secrecy system has systematically denied

Test Passed
Log

The secrecy system has systematically denied

American historians access to the records of American

Test Passed
Log

American historians access to the records of American

history. Of late we find ourselves relying on archives

Test Passed
Log

history. Of late we find ourselves relying on archives

of the former Soviet Union in Moscow to resolve

Test Passed
Log

of the former Soviet Union in Moscow to resolve

questions of what was going on in Washington at

Test Passed
Log

questions of what was going on in Washington at

midcentury. The Venona intercepts contained

Doesn't make sense
Log

midcentury. The Venona intercepts contained

overwhelming proof of the activities of Soviet spy

Test Passed
Log

overwhelming proof of the activities of Soviet spy

networks in America, complete with names,

Test Passed
Log

networks in America, complete with names,

dates, places, and deeds.

Test Passed
Log

dates, places, and deeds.

Language: C++

Test suit missing the required header std::vector

Solved by figuring out a function analagous to the encoder function and then "reversing" the input and output for each position in the overall string using dictionaries, but I saw some people were able to obtain the encoder function and I can't deduce why my encoder function also works, and also why other people's different decoder functions work? Can someone help me understand?

This kata is voulnerable to file read attack, you can simply require fs in node and then read the index file and have the kata solved for you.
I noticed cause when I'm stuck I just console.log this which shows index file is cached and fs is active.

const fs = require('fs');

fs.readFile('/home/codewarrior/index.js', 'utf8', (err, data) => {
  if (err) {
    console.error(err);
    return;
  }
  console.log(data);
});