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
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。