exB: move slides into the exercise folder

A symlink is provided for compatibility.

slides/map_example_codealong.py

@@ -1,40 +0,0 @@
-# Computer scientists love the Fibonacci sequence
-# [https://en.wikipedia.org/wiki/Fibonacci_sequence], possibly
-# described by Acharya Pingala in छन्दःशास्त्र (Chhandaḥśāstra).
-#
-# The basic definition is that the next item in the sequence
-# if the sum of the two preceding items, and the two initial
-# items and 0 and 1.
-#
-# We end up with [0, 1, 1, 2, 3, 5, 8, 13, ...]
-
-def fibbo(n):
-    match n:
-        case 0 | 1:
-            return n
-        case _:
-            return fibbo(n-1) + fibbo(n-2)
-
-# For example: the first few items in the sequence:
-for n in range(36):
-    print(n, fibbo(n))
-
-# A (nowadays) less commonly used way to construct the mapping
-# from n to fibbo(n) is to use the map function.
-# map returns a generator, and we call list to collect the numbers:
-sequence = list(map(fibbo, range(36)))
-print(sequence)
-
-# To split the work between multiple Python processes, we can
-# use the multiprocessing module:
-import multiprocessing
-
-pool = multiprocessing.Pool()
-sequence = pool.map(fibbo, range(36))
-print(sequence)
-
-# We may use 'with' to clean up the pool after we're done with
-# the workers:
-with multiprocessing.Pool(10) as pool:
-    sequence = pool.map(fibbo, range(36))
-print(sequence)

slides/map_example_codealong.py

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+../exercises/exerciseB/map_example_codealong.py