Word Chains (#65)


#1

The three rules of Ruby Q.:

  1. Please do not post any solutions or spoiler discussion for this quiz
    until
    48 hours have passed from the time on this message.

  2. Support Ruby Q. by submitting ideas as often as you can:

http://www.rubyquiz.com/

  1. Enjoy!

Suggestion: A [QUIZ] in the subject of emails about the problem helps
everyone
on Ruby T. follow the discussion.

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

When someone asked for a set of exercises on Ruby T. this week, one of
the
answers was to check out the Code Katas by Dave T… I’m a big fan
of those
problems myself, so let’s do one of them.

This week’s quiz is to write a program that takes two words as program
arguments. The words will be the same length. Please also support a -d
command-line option that can be used to switch dictionary files (one
word per
line), but it’s fine to use a reasonable default for your system.

The output of your program is to be a word chain, printing one word per
line.
The first word in the chain is the first argument to the program and the
last
word is the other argument. All other words in the chain vary by
exactly one
letter from the words surrounding it. If a chain can not be formed from
the
arguments using the selected dictionary, print a simple error message.

Here are some sample runs of my solution, so you can see how chains
look:

$ ruby word_chain.rb work play
work
pork
pory
pony
piny
piky
puky
puly
paly
paty
katy
kath
hath
hash
pash
push
puss
poss
post
pout
prut
prat
plat
play
$ ruby word_chain.rb lead gold
lead
load
goad
gold
$ ruby word_chain.rb love hate
love
hove
have
hate

Aim for the shortest paths if you can find them (the above examples may
not be
them) and fast running times.


#2
  • On Feb 3 23:00, Ruby Q. (removed_email_address@domain.invalid) wrote:

When someone asked for a set of exercises on Ruby T. this week, one
of the answers was to check out the Code Katas by Dave T… I’m a
big fan of those problems myself, so let’s do one of them.

Pardon me if I’m missing something, James, but wasn’t this Quiz #44?

http://www.rubyquiz.com/quiz44.html

Tom


#3

déjà vu?

http://www.rubyquiz.com/quiz44.html
(hope I am not violating rule #1)


#4

On Feb 3, 2006, at 8:15 AM, Thomas K. wrote:

  • On Feb 3 23:00, Ruby Q. (removed_email_address@domain.invalid) wrote:

When someone asked for a set of exercises on Ruby T. this week, one
of the answers was to check out the Code Katas by Dave T… I’m a
big fan of those problems myself, so let’s do one of them.

Pardon me if I’m missing something, James, but wasn’t this Quiz #44?

http://www.rubyquiz.com/quiz44.html

Boy I’m glad some of you are paying attention, because I’m
obviously not!

Sorry, I get lots of duplicate ideas sent in. Looks like this is the
first one I failed to catch.

I’ll get a another quiz out later today…

James Edward G. II


#5
  • On Feb 3 23:20, James Edward G. II (removed_email_address@domain.invalid) wrote:

Boy I’m glad some of you are paying attention, because I’m
obviously not!

No problem - we appreciate the work you put in! Love the quizzes, even
if I’m usually quiet about them.

I’ll get a another quiz out later today…

Shucks. I was hoping to do this one (avoiding the summary/solution, of
course) to make up for missing the last :wink:

Tom


#6

Patrick H. schrieb:

déjà vu?

http://www.rubyquiz.com/quiz44.html
(hope I am not violating rule #1)

Haha!
The page turned!
I made once a submission to make a quiz to build regexp automatically to
match a range of numbers.
JEG2 told meto look at quiz4 :wink:

errare humanum est

~waiting


#7

On Feb 3, 2006, at 8:39 AM, Robert R. wrote:

I made once a submission to make a quiz to build regexp
automatically to match a range of numbers.
JEG2 told meto look at quiz4 :wink:

My wife asked me a while back, “Hey, have you done a Su Doku quiz?”
I’m only slightly embarrassed to admit that I had to go look to
answer her. :slight_smile:

James Edward G. II