Question

Write (deep-a2b x) - if x is the symbol 'a then return 'b - if x is a non-list, return x - is x is a list, return a new list where all 'as are 'bs

a. (deep-a2b 'a)
b. (deep-a2b 'b)
c. (deep-a2b x)
d. (deep-a2b 'c)

Answer 1

The 'deep-a2b' function operates on a symbol 'x' and returns different results based on different conditions: returning 'b' if 'x' is 'a', returning 'x' if 'x' is a non-list, and replacing 'a' with 'b' if 'x' is a list.

Step-by-step explanation:

In this question, we are given a function called 'deep-a2b' that operates on a symbol 'x'. We need to define what this function does based on different conditions:

1. If 'x' is the symbol 'a', the function should return the symbol 'b'.
2. If 'x' is a non-list, the function should return 'x'.
3. If 'x' is a list, the function should return a new list where all occurrences of the symbol 'a' are replaced with the symbol 'b'.

So, let's evaluate each case:

1. a. (deep-a2b 'a): The input is 'a' which matches the first condition, so the function returns 'b'.
2. b. (deep-a2b 'b): The input is 'b' which is a non-list, so the function returns 'b'.
3. c. (deep-a2b x): Here, 'x' is a placeholder symbol, and without further context, we cannot determine its value.
4. d. (deep-a2b 'c): The input is 'c' which is a non-list, so the function returns 'c'.