paiza.ioでelixir その105

概要

paiza.ioでelixirやってみた。
練習問題やってみた。

練習問題

jsonをパースして、geojsonを、生成せよ。

サンプルコード

defmodule Main do
    def main() do
        json = """
{
		"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"
		}]
}
"""
        json = String.replace(json, "\n", "")
        json = String.replace(json, "\t", "")
        line = String.split(json, "lat")
        IO.write """
{"type":"FeatureCollection","features":[
"""
        Enum.map(line, fn s -> 
            mat = Regex.named_captures(~r/\": \"(?<lat>.+)\",\"lon\": \"(?<lon>.+)\",\"name\": \"(?<name>.+)\"}/, s)
            print(mat["lat"], mat["lon"], mat["name"])
        end)
        IO.puts "{}]}"
    end
    def print(nil, nil, nil) do
    end
    def print(lat, lon, name) do
        IO.write "{\"type\":\"Feature\",\"properties\":{\"name\":\"#{name}\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[\"#{lon}\",\"#{lat}\"]}},"
    end
end

Main.main

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"]}},{}]}

成果物

以上。