Implementation for already available classes in Ruby

Question

Hi All, I am a Java Developer and a newbie in Ruby. Does Ruby not implement available classes in Ruby lang itself(as done in Java). Actually I have downloaded the code for Ruby and was trying to find the implementation for classes like Fixnum, etc. But could not find it.

Answer 1

In YARV/MRI most of the core classes are implemented in C (see array.c, bignum.c, string.c and so on) but some of the less-core classes are implemented in Ruby (e.g Set, Vector and so on).

However, in Rubinius (another Ruby implementation) almost all (afaik) of the core classes are implemented in pure Ruby.