You don't have distinction between runtime and development time. Which means you can debug live. It's a bit like being logged in an IRB session on your rails ap

You don't have distinction between runtime and development time. Which means you can debug live. It's a bit like being logged in an IRB session on your rails application. Except that you have better tools than a plain command line. Ruby feels closer to Smalltalk than Obj-C to me. If you're familiar with Cocoa/Obj-C, you can have a look at http://www.fscript.org/ http://www.fscript.org/