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Re: Curious about some comments I received on some of my code

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ngw@nofeed.org wrote:

> The task was "Write a program that prints a
> multiplication table of primes numbers."

require 'prime'

def prime_mul_table n
  a = Prime.take(n)
  width = (a[-1]**2).to_s.size
  matrix = [" ",*a].zip((a + a.product(a).map{|m,n| m*n}).each_slice(n)).
  map{|x,xs| [x,*xs].map{|x| x.to_s.rjust(width)}.join " "}
end

prime_mul_table(12).each{|r| puts r}
        2    3    5    7   11   13   17   19   23   29   31   37
   2    4    6   10   14   22   26   34   38   46   58   62   74
   3    6    9   15   21   33   39   51   57   69   87   93  111
   5   10   15   25   35   55   65   85   95  115  145  155  185
   7   14   21   35   49   77   91  119  133  161  203  217  259
  11   22   33   55   77  121  143  187  209  253  319  341  407
  13   26   39   65   91  143  169  221  247  299  377  403  481
  17   34   51   85  119  187  221  289  323  391  493  527  629
  19   38   57   95  133  209  247  323  361  437  551  589  703
  23   46   69  115  161  253  299  391  437  529  667  713  851
  29   58   87  145  203  319  377  493  551  667  841  899 1073
  31   62   93  155  217  341  403  527  589  713  899  961 1147
  37   74  111  185  259  407  481  629  703  851 1073 1147 1369


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Curious about some comments I received on some of my code ngw@nofeed.org - 2016-05-18 02:23 -0700
  Re: Curious about some comments I received on some of my code Robert Klemme <shortcutter@googlemail.com> - 2016-05-21 22:01 +0200
  Re: Curious about some comments I received on some of my code "WJ" <w_a_x_man@yahoo.com> - 2016-07-23 23:43 +0000

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