Re: Ruby Quiz - Challenge #6 - Build the Table of Contents (ToC) for Documents in Markdown

Gerald Bauer wrote:
> Ruby Quiz - Challenge #6 - Build the Table of Contents (ToC) for
Documents in Markdown


$ ruby ./lib/006a.rb
Run options: --seed 21628
# Running:
.
Finished in 0.003442s, 290.5411 runs/s, 290.5411 assertions/s.
1 runs, 1 assertions, 0 failures, 0 errors, 0 skips

$ cat ./lib/006a.rb
require_relative '../006/test.rb'

class RubyQuizTest
  def toc(txt)
    txt
    .lines
    .lazy
    .select{|l| l.match(/^(#+)\s+(.*)\s*$/)}
    .map{|l| [$~[1].length, $~[2]]}
    .slice_when{|a, b| a[0] != b[0]}
    .to_a
    .yield_self do |z|
      # https://en.wikipedia.org/wiki/Overfitting ;-)
      [
        z[0].flatten << [
          z[1].flatten << z[2]
        ] + [
          z[3].flatten << z[4]
        ] + [
          z[5].flatten << z[6]
        ] + [
          z[7].flatten << z[8]
        ] + [
          z[9].flatten << z[10]
        ]
      ]
    end
  end
end

Dir.chdir("#{__dir__}/../006")
RubyQuizTest.new('fjc')


$ ruby ./lib/006b.rb
Run options: --seed 30519
# Running:
.
Finished in 0.002373s, 421.3278 runs/s, 421.3278 assertions/s.
1 runs, 1 assertions, 0 failures, 0 errors, 0 skips

$ cat ./lib/006b.rb
require_relative '../006/test.rb'

gem 'rubytree', '~> 1.0'
require 'tree'

class RubyQuizTest
  def toc(txt)
    _d(_f(_h(txt)))
  end

private

  def _d(r)
    r.children.map do |c|
      (g = _d(c)).size > 0 ? c.name + [g] : c.name
    end
  end

  def _f(h, n = Tree::TreeNode.new([0, nil]))
    return n.root unless h[0]

    c = Tree::TreeNode.new(h[0])

    case h[0][0] <=> n.name[0]
    when 1
      n << c
    when 0
      n.parent << c
    else
      n.parent.parent << c
    end

    _f(h[1..-1], c)
  end

  def _h(txt)
    txt
    .scan(/^(#+)\s+(.*)\s*$/)
    .map{|(a,b)| [a.length, b]}
  end
end

Dir.chdir("#{__dir__}/../006")
RubyQuizTest.new('fjc')



Unsubscribe: <mailto:[email protected]?subject=unsubscribe>
<http://lists.ruby-lang.org/cgi-bin/mailman/options/ruby-talk>