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hughlilly · hughlilly · commit ea05bd93b9ff · 2022-01-27T10:43:03.000+13:00
diff --git a/06-map-filter-reduce/mfr9.py b/06-map-filter-reduce/mfr9.py
@@ -16,5 +16,7 @@
 print(total)
 
 # Ultimately adding numbers together like this is not a great use of `reduce()`
-# Because built-ins like "sum" and the "add" module in "operator" exist.
-# See https://stackoverflow.com/a/33772246/10267529 for details.
+# because built-ins like "sum" and the "add" module in "operator" exist, but it
+# gives you some idea of how cumulative functions work.
+# See https://stackoverflow.com/a/33772246/10267529 and
+# https://realpython.com/python-reduce-function/ for more.
