An anonymous reader writes: Ruby developers have announced the official release of Ruby 2.3.0. This release introduces a frozen string literal pragma, which is "a new magic comment and command line option to freeze all string literals in the source files." It also adds a safe navigation operator &. similar to what exists in C#, Groovy, and Swift. Ruby 2.3.0 also has many performance improvements. For more details, see the news file and the full changelog.