Interesting! What is the book called? I ran through many examples like this in ruby once upon a time, but I just tried to crack various cyphers from their wikipedia descriptions. On Thu, Mar 10, 2011 at 12:23 AM, aditya siram wrote:

What do you have so far? Or how are you thinking of attacking the problem? -deech

On Wed, Mar 9, 2011 at 10:00 AM, Jessica Baker wrote:

...

3.1 Step 1 Create a Haskell script le called crypt.hs and enter the code for he Caesar cipher from Section 5.5 of the text book (Hutton). Make sure you understand how all the functions work.

3.2 Step 2 Transform your script le (from Step 1) into a Haskell program that reads text from the standard input, encrypts the text using the Caesar cipher, and writes the result to the standard output. Your program should take a command-line argument that speci es the shift factor to be used. So, for example: cat poem.txt | ./crypt 3 Eqvdqjxlqlqj wkh vnb Hrz khdylob lw glhv Iqwr wkh Whvw dzdb Pdvw wrxfk dqg vljkw dqg vrxqg Nr orqjhu wr eh irxqg Hrz krshohvv xqghujurxqg Fdoov wkh uhpruvhixo gdb

If the command-line argument is 0 (zero) then the program should crack the code and output the deciphered text. So, the following command pipeline should echo the original message: cat poem.txt | ./crypt 3 | ./crypt 0 Ensanguining the sky How heavily it dies Into the West away Past touch and sight and sound No longer to be found How hopeless underground Falls the remorseful day

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Good morning, I'm going thru this book now...it's excellent... The author is Graham Hutton and you can view the full text at: http://horna.org.ua/books/fp-papers/Hutton,%20Graham%20-%20Programming%20in%... In addition, I'm also reading "Category Theory" by Steve Awodey - it was written for Computer Scientists and not Mathemeticians...I'll let you know about it... Good day ----- Original Message ----- From: "Daniel Fischer" To: Sent: Thursday, March 10, 2011 7:33 AM Subject: Re: [Haskell-beginners] Help!!

On Thursday 10 March 2011 12:46:15, Lyndon Maydwell wrote:

...

Interesting! What is the book called?

"Programming in Haskell", iirc.

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