Background: |
A long time ago while I was living in Boston I got to know Jon Orwant. When he started publishing a magazine devoted to Perl and things related it was suggested that I might want to write an article for it. The magazine was The Perl Journal, and I finally got around to writing an article in time for Issue 4. |
8 Queens: |
The 8 queens problem is quite simple. Given an 8×8 chess board, how can 8 queens be arranged on the board so that none is threatening any of the others. Timothy Budd used the 8 queens problem as an example in the first edition of his book An Introduction to Object-Oriented Programming (see his list of books). I simply translated the Objective C version into perl and described the problem in the article. |
The Code: |
The code consists of 3 files:
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The Ruby Code: |
The same solution has been implemented in Ruby in a single file 8q.rb. This is just an experiment in playing with Ruby, and may not be idiomatic. It does seem cleaner than Perl, even if there isn’t a use strict; to keep me on the straight and narrow. |