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#blog_snippets
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| iex> %{example_map | delta: "five"} | |
| ** (KeyError) key :delta not found in: %{alpha: "one", bravo: "two", charlie: "three"} | |
| (stdlib 3.12.1) :maps.update(:delta, "five", %{alpha: "one", bravo: "two", charlie: "three"}) | |
| (stdlib 3.12.1) erl_eval.erl:256: anonymous fn/2 in :erl_eval.expr/5 | |
| (stdlib 3.12.1) lists.erl:1263: :lists.foldl/3 |
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