I would rate this kata as 6 kyu rather than 7, but it's nice anyway

Modified description to have :

Not all strings will contain digits and not all inputs will be string. In those cases, return -1.

Should be clear now.

Not all strings will contain digits and not all inputs will be string. In those cases, return -1.

Rewrote more explicitly now.

Not all strings will contain digits and not all inputs will be string. In those cases, return -1.

It is now clearly mentionned.

Fixed in this fork

Merged.

Not all strings will contain digits. In this case and the case for any non-strings, return -1.

It could be clearer indeed but it is mentionned.
Here's a JS fork modifying the description. Hope it is better

js fork 🤖🤖🤖

• updated to node 18
• removed function name from description for language-agnosticism
• used mocha/chai assertions and lodash for randomness
• added invalid inputs in random tests
• provided input on failure

Merged the fork fixing the order of actial and expected.

https://www.codewars.com/kumite/67b910f422cd83e231378623?sel=67b910f422cd83e231378623 Here

python new test framework is required. updated in this fork

• No random tests in PHP

• Actual and expected are swapped

Description:

Given a string of characters...

But in JS, the input could be numbers or arrays. Either revise the description or remove non-string inputs from the tests.

Re-raised as an issue.