I think it is better to use a very easy editor, like bluefish, and 
instead try to memorize or "think" in ruby. Ruby does not really need 
any IDE.

When you have a large project though, it may be better to load the 
workload into the IDE, but most big IDEs seem to focus on languages like 
C# or Java.

I would argue that you should first try to learn Ruby the hard way, with 
a simple editor, and then when the language does not confuse you much, 
you can still switch to a better editor/IDE.

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