From: "Jan E." <lists@...>
Date: 2012-07-17T18:05:52+09:00
Subject: Re: learning by doing part 2 - tc game

Sebastjan H. wrote in post #1069017:
> well,  I like to stay away from until/while, however, I am not sure how
> to avoid it in the case of running combat turns:

No, "until" and "while" are perfectly fine, I was talking about this 
particular structure:

begin
  #body
end while #condition

This one you should avoid, because it behaves unexpectedly (and is just 
ugly). In contrast to all other uses of the "while" modifier, it 
executes the body *before* checking the condition -- like a "do-while" 
loop in other languages.

If you actually need a "do-while" loop, use an endless loop with a 
conditional "break" at the end of the loop body:

loop do
  #body
  break unless #condition
end

The same goes for "begin-end-until", of course. In this case you need a 
"break if" at the end.

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