From: "Peña, Botp" <botp@...>
Date: 2007-12-14T12:22:09+09:00
Subject: Re: Simple method and block. foo.times

From: Bernardo Monteiro Rufino [mailto:bermonruf@gmail.com] 
# class Integer
#    def mytimes(start=0, inc=1, &block)
#      start.step(start + (self * inc) - 1,  inc, &block);

ah, indeed; and as always, any refactoring/change must pass the test.. 


irb(main):011:0> 0.mytimes(-1,-1){|x| p x}
-1
-2
=> -1
irb(main):012:0> 1.mytimes(-1,-1){|x| p x}
-1
-2
-3
=> -1
irb(main):013:0> 2.mytimes(-1,-1){|x| p x}
-1
-2
-3
-4
=> -1
irb(main):014:0> 2.mytimes(-1,0){|x| p x}
ArgumentError: step can't be 0
        from (irb):3:in `step'
        from (irb):3:in `mytimes'
        from (irb):14
        from :0


btw, i do not like the way ruby arranges it's params for #step. I prefer the step/inc arg to be the first arg since it reads clearly. eg,

instead of 1.step 10, 2
i like     1.step 2, 10

reads clearly, and the step/inc is emphasize.

kind regards -botp