[racket] why here 2 functions

From: Stephen Bloch (bloch at adelphi.edu)
Date: Tue Apr 3 10:17:00 EDT 2012

On Apr 3, 2012, at 9:34 AM, Roelof Wobben wrote:

> I have to make this exercise : 
> Design the function different. It consumes two (representations of) three-letter words and creates a word from the differences. For each position in the words, it uses the letter from the second word, if the two are the same; otherwise it uses the marker "*". Note: The problem statement mentions two different tasks: one concerning words and one concerning letters. This suggests that you design two functions.
> Im my opion I only need 1 function.
> I use a cond to check if the letters are the same and if print the letter otherwise print x .

I can imagine doing this as a single function, but I agree that it would be cleaner and more modifiable if it were done as two functions, "one concerning words and one concerning letters."

What is the contract of your 1 function?

Stephen Bloch
sbloch at adelphi.edu

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