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Discussion on: Picking up Ruby, as a Python Dev & a mini fish app

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topofocus profile image
Hartmut B. •

You can easily rewrite

  def show_timeline
    puts "Fishify: #{@title} has tracked #{@levels.count} Levels"

    @levels.sort_by( &:time ) 
                 .reverse
                 .each { |t|  puts "#{t.ph} #{t.ammonia} #{t.nitrites} #{t.nitrates} #{t.temp{t.time}"    }
  end
end
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Next: the output in the iteration is not recommended.
map and join are your friends.

  def show_timeline
    puts "Fishify: #{@title} has tracked #{@levels.count} Levels"
    puts @levels.sort_by( &:time ) 
                         .reverse
                         .map{ |t| [t.ph, t.ammonia, t.nitrites, t.nitrates, t.time].join(" ")}
                         .join "\n"
 end
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Then the code is quite different from any python program, I guess. To me its more readable. Don't now, how this feels from your perspective,

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vickilanger profile image
Vicki Langer •

Oh yeah! I was already told I should probably use .map most times that I see .each. Forgot about that.

adds to notes "no output in an iteration"

I can see how this works better. Thanks!