| This section covers editors, editor add-ons, and other tools. Support for emacs and viFans (or at least users) of either of these two popular editors will find add-ons to enable automatic indentation, syntax highlighting, and so on. See the Ruby Application Archive. xmpA "sample printer" that takes code and evaluates it a line at a time, placing the returned value to the right as a comment. It is useful in writing books or tutorials, or for pasting into mail or news messages. irb ("interactive Ruby")This simply evaluates a line at a time and prints the results of each line. This is a useful way of trying some technique you're unsure of, or of gaining insight into how a small piece of code works.
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