jRuby is described as 'JRuby is a 100% Java implementation of the Ruby programming language running on the Java Virtual Machine (JVM)' and is an app in the development category. There are more than 25 alternatives to jRuby for a variety of platforms, including Windows, Linux, Mac, BSD and Web-based apps. The best jRuby alternative is Java. It's not free, so if you're looking for a free alternative, you could try Java or JavaScript. Other great apps like jRuby are Ruby, Kotlin, Crystal (programming language) and Apache Groovy.
Pluto is a superset of Lua 5.4 designed for general-purpose programming. While being remarkably compatible with Lua 5.4 source-code & bytecode, it enhances the standard library & adds more than a dozen highly-desired syntaxes such as switch statements, compound...
Eiffel is an object-oriented programming language designed by Bertrand Meyer (an object-orientation proponent and author of Object-Oriented Software Construction) and Eiffel Software. Meyer conceived the language in 1985 with the goal of increasing the reliability of commercial...
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