Programming Ruby, 2nd Ed. goes farther afield in its 800+ pages, but has less material on the language itself and more material on ancillary matters.

A study based on Black Duck Software's Koders.com search engine data shows that the use of the Ruby language has grown significantly in the last four years. According to the Koders.com data, Ruby ...

Still in the top 10 of RedMonk’s language rankings, Ruby faces tough competition from Go, Rust, Swift, and Kotlin ...