This Ruby gem is meant as a proof of concept for promoting the Ruby Change Request 335. The RCR was rejected but Sather iterators made it into Ruby 1.9 anyway :-)
Using it is pretty simple, just use
si_loop instead of
loop and prefix each
iterator method invocation with
.si. For example:
si_loop do x = somearray.si.each y = anotherarray.si.each ... end
See the documentation for si.rb for details.