wslでnerves その26

# 概要
wsl(wsl2じゃない)でnervesやってみる。
qemu(x86_64エミュレータ、ラズパイじゃない)でやってみた。
生成したnerves_livebook.imgを、quemで起動してテストしてみた。
練習問題、やってみた。

# 練習問題
jasonを使え。

# 写真

![image.png](https://qiita-image-store.s3.ap-northeast-1.amazonaws.com/0/18104/1a2bb39b-09f5-03a9-4adf-cb61723a735d.png)

# セットアップ　

```
Mix.install([
  {:jason, "~> 1.4"}
])
```

# サンプルコード

jsonをパースして、geojsonを返す。

```
geojson =
  """
  {
  		"bikuya": [{
  				"lat": "37.929687",
  				"lon": "140.151111",
  				"name": "オートショップユニット"
  		}, {
  				"lat": "37.929220",
  				"lon": "140.109344",
  				"name": "（株）エイジュウプロ"
  		}, {
  				"lat": "37.923453",
  				"lon": "140.093108",
  				"name": "（株）ホンダウイングロードショウ"
  		}, {
  				"lat": "37.911333",
  				"lon": "140.112004",
  				"name": "（有）カーセンター葵商会"
  		}, {
  				"lat": "37.907591",
  				"lon": "140.108036",
  				"name": "塚本サイクル"
  		}, {
  				"lat": "37.928429",
  				"lon": "140.114247",
  				"name": "サイクルショップ川口"
  		}, {
  				"lat": "37.916279",
  				"lon": "140.099879",
  				"name": "サイクルショップ中村"
  		}, {
  				"lat": "37.917854",
  				"lon": "140.101416",
  				"name": "菅原商会"
  		}, {
  				"lat": "37.912485",
  				"lon": "140.108688",
  				"name": "サイクルセンター卯月"
  		}, {
  				"lat": "37.912049",
  				"lon": "140.105914",
  				"name": "ホンダ野村モータース"
  		}, {
  				"lat": "37.869915",
  				"lon": "140.103534",
  				"name": "モーターハウスＫ"
  		}, {
  				"lat": "37.918955",
  				"lon": "140.109289",
  				"name": "ライダースサロン・ヤマカ"
  		}, {
  				"lat": "37.915746",
  				"lon": "140.108313",
  				"name": "中央ホンダ"
  		}, {
  				"lat": "37.905011",
  				"lon": "140.107225",
  				"name": "香澄ホンダ"
  		}, {
  				"lat": "37.912663",
  				"lon": "140.123328",
  				"name": "佐藤オート商会"
  		}, {
  				"lat": "37.910789",
  				"lon": "140.121636",
  				"name": "香坂輪店"
  		}, {
  				"lat": "37.958525",
  				"lon": "140.125682",
  				"name": "斎藤モータース"
  		}, {
  				"lat": "37.956678",
  				"lon": "140.117820",
  				"name": "ニューホンダ石山"
  		}, {
  				"lat": "37.903901",
  				"lon": "140.131694",
  				"name": "二輪屋たかはし"
  		}, {
  				"lat": "37.886019",
  				"lon": "140.104554",
  				"name": "夢工場"
  		}, {
  				"lat": "37.874814",
  				"lon": "140.103239",
  				"name": "あべ輪店"
  		}, {
  				"lat": "37.905055",
  				"lon": "140.137379",
  				"name": "レッドバロン米沢"
  		}]
  }
  """
  |> Jason.decode!()
  |> Map.get("bikuya")
  |> Enum.reduce("{\"type\":\"FeatureCollection\",\"features\":[", fn i, acc ->
    lat = i |> Map.get("lat")
    lon = i |> Map.get("lon")
    name = i |> Map.get("name")

    acc <>
      "{\"type\":\"Feature\",\"properties\":{\"name\":\"#{name}\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[#{lon},#{lat}]}},"
  end)

geojson = geojson <> "{}]}"
```

# 実行結果

```
"{\"type\":\"FeatureCollection\",\"features\":[{\"type\":\"Feature\",\"properties\":{\"name\":\"オートショップユニット\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[140.151111,37.929687]}},{\"type\":\"Feature\",\"properties\":{\"name\":\"（株）エイジュウプロ\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[140.109344,37.929220]}},{\"type\":\"Feature\",\"properties\":{\"name\":\"（株）ホンダウイングロードショウ\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[140.093108,37.923453]}},{\"type\":\"Feature\",\"properties\":{\"name\":\"（有）カーセンター葵商会\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[140.112004,37.911333]}},{\"type\":\"Feature\",\"properties\":{\"name\":\"塚本サイクル\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[140.108036,37.907591]}},{\"type\":\"Feature\",\"properties\":{\"name\":\"サイクルショップ川口\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[140.114247,37.928429]}},{\"type\":\"Feature\",\"properties\":{\"name\":\"サイクルショップ中村\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[140.099879,37.916279]}},{\"type\":\"Feature\",\"properties\":{\"name\":\"菅原商会\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[140.101416,37.917854]}},{\"type\":\"Feature\",\"properties\":{\"name\":\"サイクルセンター卯月\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[140.108688,37.912485]}},{\"type\":\"Feature\",\"properties\":{\"name\":\"ホンダ野村モータース\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[140.105914,37.912049]}},{\"type\":\"Feature\",\"properties\":{\"name\":\"モーターハウスＫ\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[140.103534,37.869915]}},{\"type\":\"Feature\",\"properties\":{\"name\":\"ライダースサロン・ヤマカ\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[140.109289,37.918955]}},{\"type\":\"Feature\",\"properties\":{\"name\":\"中央ホンダ\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[140.108313,37.915746]}},{\"type\":\"Feature\",\"properties\":{\"name\":\"香澄ホンダ\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[140.107225,37.905011]}},{\"type\":\"Feature\",\"properties\":{\"name\":\"佐藤オート商会\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[140.123328,37.912663]}},{\"type\":\"Feature\",\"properties\":{\"name\":\"香坂輪店\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[140.121636,37.910789]}},{\"type\":\"Feature\",\"properties\":{\"name\":\"斎藤モータース\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[140.125682,37.958525]}},{\"type\":\"Feature\",\"properties\":{\"name\":\"ニューホンダ石山\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[140.117820,37.956678]}},{\"type\":\"Feature\",\"properties\":{\"name\":\"二輪屋たかはし\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[140.131694,37.903901]}},{\"type\":\"Feature\",\"properties\":{\"name\":\"夢工場\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[140.104554,37.886019]}},{\"type\":\"Feature\",\"properties\":{\"name\":\"あべ輪店\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[140.103239,37.874814]}},{\"type\":\"Feature\",\"properties\":{\"name\":\"レッドバロン米沢\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[140.137379,37.905055]}},{}]}"


```


以上。