From: Dale Martenson <dale.martenson@...>
Date: 2006-11-03T01:52:46+09:00
Subject: Re: PP / PrettyPrint annoyances

Elliot Winkler wrote:

> This behavior is sort of ridiculous in my opinion. I'd rather have 
> something
> more like:
> 
> [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 
> 20,
>  21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38,
>  39, 40]

The problem with 'pp' in my opinion is the mysterious 'breakable'. What 
you can do is omit the and handle end of line cases in different manner. 
Someday I may look at changing 'breakable', but for now this works.

<< START OF CODE

require 'pp'

class PP
  def comma
    text ','
  end

  def comma_newline
    text ",\n"
  end

  def seplist_with_limit(list, limit=20, item_sep=nil, line_sep=nil, 
iter_method=:each)
    item_sep ||= lambda { comma }
    line_sep ||= lambda { comma_newline }

    count = 0
    first = true
    list.__send__(iter_method) { |v|
      if count % limit == 0
        if first
          first = false
        else
          line_sep.call
        end
      else
        item_sep.call
      end
      yield(v)
      count += 1
    }
  end
end

class Array
  def pretty_print(q)
    q.group(1, '[', ']') {
      q.seplist_with_limit(self, 20) { |v|
        q.pp v
      }
    }
  end
end

pp (0..20).to_a

pp (0..40).to_a

>> END OF CODE

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