In 2007 the president of the University ACM chapter told me not to toy around with languages outside the CS curriculum, and that Ruby was a waste of time. I'm grateful everyday that I ignored his advice.
We learned Ruby in CS. It was in a "sampling of languages" class, which also included Rust (for which I'm very grateful)! Ruby was a cute curiosity, but Rust is a paradigm shift. :p
In the one I took we did Prolog which has not exactly proven useful. I don’t think I ever used anything in that class, unlike most of the rest of the CS classes I took.