Hi there, I'm not an expert in Ruby, but here you will find a very useful explanation on this matter.

https://blog.newrelic.com/2014/12/10/weird-ruby-2-rescue-interrupt-ensure/

Clean and compact solution

Clean and readable solution

Good kata, thanks

Good kata, useful for practicing Matrix class in Ruby

Good kata, having in mind that this method returns a boolean, could be renamed to valid? according to best practices in ruby?

Thanks for this kata

Good kata for practising maths algorithms and ruby skills

Thanks, good kata for strings

Thanks for your kata

Good kata, good practice for strings, thanks

Thanks, it was my first attempt as a beginner as well

I tested all cases on ruby in my machine and the '£' test passed with my solution, but attending your comments I decided to remove it from the tests.

I have tested that specific string "1£^%1" with my solution and is working. I'll try to figure out if there is something else I could do