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A comment on Crafting Code in Clojure. Parent comment
a = {"fred": 4, "wilma": 8} b = {"t-shirt": 6, "fred": 0}
print ", ".join(sorted(set(a).union(b))) or "<none>"
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a = {"fred": 4, "wilma": 8} b = {"t-shirt": 6, "fred": 0}
print ", ".join(sorted(set(a).union(b))) or "<none>"