Hi! On 01.12.2008, at 07:54, rocksonchan wrote: > > i was trying to do the "hello world!" on my mac (v10.4 with ruby > 1.8.2) in text editor, > but i could not save it with a .rb extension. If you use TextEdit then you should change the preferences so that you use plaintext format instead of the Rich/RTF format (default?). Also you can try google and test some other text editors. There are really plenty of it. > can someone please point out what i did wrong ? I think there's some osx magic stuff that change the suffix of your file to .txt or .rtf. Try to change the finder.app settings and you will see it. > p.s. is there any simple free editor program for beginner that will > help me to learn ruby better? No Texteditor will ever help you to learn a language. hth, Sandor Szs --