gitignore output, post weekly listening

Author: andyleclair

.gitignore

@@ -24,3 +24,7 @@ personal-*.tar
 
 # Temporary files, for example, from tests.
 /tmp/
+
+.expert
+
+output/

drafts/dont-wrap-that-ets-table.md

@@ -0,0 +1,45 @@
+%{
+  title: "Don't Wrap That ETS Table",
+  description: "Don't make this common mistake",
+  author: "Andy LeClair",
+  tags: ["elixir"],
+  related_listening: "https://www.youtube.com/watch?v=fXjTxC-HbKY",
+}
+---
+
+I've seen this pattern enough that I wanted to make a post about it. Don't wrap that ETS table!
+
+Consider the following Elixir code:
+
+```elixir
+def MyServer do
+    use GenServer
+    @table __MODULE__
+
+    def start_link(opts) do
+        GenServer.start_link(__MODULE__, opts, name: __MODULE__)
+    end
+
+    def init(_) do
+        _tid = :ets.new(@table, [:set, :protected, :named_table])
+        {:ok, []}
+    end
+
+    def put_item(key, value) do
+        GenServer.call(__MODULE__, {:put_item, key, value})
+    end
+
+    def get_item(key) do
+        GenServer.call(__MODULE__, {:get_item, key})
+    end
+
+    def handle_call({:get_item, key}, _from, _state) do
+        :ets.lookup(@table, key)
+    end
+
+    def handle_call({:put_item, key, value}, _from, _state) do
+        :ets.insert(@table, key, value)
+    end
+end
+```
+

lib/mix/tasks/publish_post.ex

@@ -0,0 +1,30 @@
+defmodule Mix.Tasks.PublishPost do
+  use Mix.Task
+
+  @impl Mix.Task
+  def run(_args) do
+    {:ok, drafts} = File.ls("./drafts") 
+
+    indexed_drafts = Enum.with_index(drafts, 1) |> Enum.map(fn {path, i} -> "#{i}. #{path}" end)
+
+    IO.puts """
+      Listing Draft posts:
+      #{Enum.join(indexed_drafts, "\n")}
+      """
+
+    index = get_draft()
+    draft = Enum.at(drafts, index - 1)
+
+    IO.puts "Publishing #{draft}"
+
+    today = Date.utc_today()
+
+    File.cp!("./drafts/#{draft}", "./posts/#{today.year}/#{today.month}-#{today.day}-#{draft}")
+    File.rm!("./drafts/#{draft}")
+  end
+
+  def get_draft do
+    IO.gets("Which draft post would you like to publish?: ") |> String.trim() |> String.to_integer()
+  end
+  
+end