You just taught me how to use reduce, thank you!

I think this solution is not what a beginner would provide

neat and concise

great ! i hadn't thought of it

perdon no se bien todavia commo usar codewards

Use spoiler flag next time.

Simple and clear ;)

to ensure case insensitivity

genius well done genius

Interesting we both used the same literate composition style. Our solution reads cleanly.

You are right. I was just being lazy and didn't want to type the extra braces.

Don't you think it may be more readable if you used string interpolation instead of concatenation?

# Concatenation
val1 = ""+2*2

# Interpolation
val2 = "#{2*2}"