{"id":603,"date":"2019-06-30T12:39:39","date_gmt":"2019-06-30T03:39:39","guid":{"rendered":"https:\/\/pg-mana.net\/blog\/?p=603"},"modified":"2024-09-09T17:18:55","modified_gmt":"2024-09-09T08:18:55","slug":"elixir-handson","status":"publish","type":"post","link":"https:\/\/pg-mana.net\/blog\/elixir-handson\/","title":{"rendered":"Elixir\u30cf\u30f3\u30ba\u30aa\u30f3"},"content":{"rendered":"\n

\u30c9\u30ea\u30b3\u30e0\u793e\u3055\u3093\u304c\u958b\u50ac\u3057\u3066\u304f\u3060\u3055\u3063\u305f\u3010\u30b5\u30fc\u30d0\u30fc\u30b5\u30a4\u30c9\u8b1b\u7fa9\uff06\u5b9f\u6280\u3011Elixir\u30cf\u30f3\u30ba\u30aa\u30f3<\/a>\u306b\u53c2\u52a0\u3057\u3066\u304d\u307e\u3057\u305f\u3002\u305d\u3053\u3067\u306e\u611f\u60f3\u3084Elixir\u306e\u611f\u60f3\u306a\u3069\u3092\u66f8\u3053\u3046\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n\n\n\n

Elixir\u3068\u306f<\/h3>\n\n\n\n

Elixir\u306f\u62e1\u5f35\u6027\u3068\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u69cb\u7bc9\u3059\u308b\u305f\u3081\u306b\u30c7\u30b6\u30a4\u30f3\u3055\u308c\u305f\u3001\u52d5\u7684\u3067\u95a2\u6570\u578b\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3067\u3059\u3002<\/p>https:\/\/elixir-lang.jp\/<\/a><\/cite><\/blockquote>\n\n\n\n

Elixir\u306fErlang VM\u4e0a\u3067\u52d5\u304f\u8a00\u8a9e\u3067\u3001\u30d5\u30a9\u30fc\u30eb\u30c8\u30c8\u30ec\u30e9\u30f3\u30b9\u3084\u30db\u30c3\u30c8\u30b9\u30ef\u30c3\u30d7\u304c\u53ef\u80fd\u306aErlang\u3092Ruby\u98a8\u306e\u8a00\u8a9e\u3067\u5229\u7528\u3057\u3088\u3046\u3068\u8a2d\u8a08\u3055\u308c\u305f\u3082\u306e\u3089\u3057\u3044\u3067\u3059\u3002
\u30b5\u30fc\u30d0\u30fc\u30b5\u30a4\u30c9\u8a00\u8a9e\u3067\u306fPHP\u3057\u304b\u6271\u3063\u305f\u3053\u3068\u3057\u304b\u306a\u304b\u3063\u305f\u79c1\u306f\u3001Elixir\u3092\u4f7f\u3063\u3066\u307f\u305f\u3044\u306a\u3041\u3068\u601d\u3063\u3066\u305f\u308f\u3051\u3067\u3059\u304c\u3001Ruby\u98a8\u306e\u8a18\u8ff0\u304c\u3069\u3046\u3082\u82e6\u624b\u3067(\u3064\u307e\u308a{}\u3092\u4f7f\u308f\u306a\u3044\u8a00\u8a9e\u7cfb)\u3001\u624b\u3053\u305a\u3063\u3066\u3044\u308b\u9593\u306b\u8272\u3005\u3057\u306a\u3044\u3068\u3044\u3051\u306a\u3044\u3053\u3068\u306b\u8ffd\u308f\u308c\u3066\u5f8c\u56de\u3057\u306b\u306a\u3063\u3066\u3044\u305f\u306e\u3067\u3059\u304c\u3001\u5e78\u3044\u30c9\u30ea\u30b3\u30e0\u793e\u3055\u3093\u306eElixir \u30cf\u30f3\u30ba\u30aa\u30f3\u306b\u53c2\u52a0\u3055\u305b\u3066\u3082\u3089\u3048\u308b\u3053\u3068\u306b\u306a\u308a\u53c2\u52a0\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n

\u3084\u3063\u305f\u3053\u3068<\/h3>\n\n\n\n

Elixir\u306fmix\u3068\u3044\u3046\u30d1\u30c3\u30b1\u30fc\u30b8\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0\u3092\u4f7f\u3063\u3066\u307e\u3059\u3002
\u30a2\u30d7\u30ea\u3092\u65b0\u898f\u4f5c\u6210\u3059\u308b\u3068\u304d\u306f
$ mix new test_app<\/code>
\u3068\u3084\u308a\u307e\u3059\u3002
\u3053\u3046\u3059\u308b\u3053\u3068\u3067<\/p>\n\n\n\n

test_app\n\u251c\u2500\u2500 README.md\n\u251c\u2500\u2500 config\n\u2502\u00a0\u00a0 \u2514\u2500\u2500 config.exs\n\u251c\u2500\u2500 lib\n\u2502\u00a0\u00a0 \u2514\u2500\u2500 test_app.ex\n\u251c\u2500\u2500 mix.exs\n\u2514\u2500\u2500 test\n    \u251c\u2500\u2500 test_app_test.exs\n    \u2514\u2500\u2500 test_helper.exs<\/code><\/pre>\n\n\n\n
\u3068\u8a00\u3046\u3088\u3046\u306a\u69cb\u6210\u306b\u306a\u308a\u307e\u3059\u3002
\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u304cmix.exs \u3067\u5b9f\u969b\u306b\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u306e\u304c lib\/test_app.ex \u3089\u3057\u3044\u3067\u3059\u3002
mix.exs\u306b\u306f\u4f9d\u5b58\u30e9\u30a4\u30d6\u30e9\u30ea\u306a\u3069\u306e\u8a18\u8ff0\u3092\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u4eca\u56de\u306e\u30cf\u30f3\u30ba\u30aa\u30f3\u3067\u306f\u5927\u91cf\u306eJSON\u30c7\u30fc\u30bf\u3092\u51e6\u7406\u3059\u308b\u30b3\u30fc\u30c9\u3092\u3084\u308a\u307e\u3057\u305f\u3002
JSON\u306e\u53d6\u6271\u306fPoison\u3068\u3044\u3046\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u3046\u3089\u3057\u3044\u306e\u3067mix.exs\u306b<\/p>\n\n\n\n
  defp deps do\n    [\n      {:poison, \"~> 4.0\"},\n      # {:dep_from_hexpm, \"~> 0.3.0\"},\n      # {:dep_from_git, git: \"https:\/\/github.com\/elixir-lang\/my_dep.git\", tag: \"0.1.0\"}\n    ]\n  end<\/code><\/pre>\n\n\n\n
\u3068\u8a18\u8ff0\u3057\u307e\u3059\u3002
\u4f9d\u5b58\u95a2\u4fc2\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3059\u308b\u305f\u3081\u306b
test_app $mix deps.get<\/code>
\u3068\u3057\u3066lib\/test_app.ex\u306edefmodule test_app\u306e\u4e2d\u306b<\/p>\n\n\n\n
def main do\n  json_text = File.stream!(\"d.json\")\n  json_data = Enum.map(data, fn d -> Poison.decode!(d) end)\n  result = Enum.filter(json_data, fn d -> d[\"age\"] <= 20 end)\n  Enum.count(result)\nend<\/code><\/pre>\n\n\n\n
\u3068\u66f8\u304dtest_app\/d.json\u3092<\/p>\n\n\n\n
{\"age\":39,\"name\":\"aaa\"}\n{\"age\":47,\"name\":\"bbb\"}\n{\"age\":46,\"name\":\"ccc\"}\n{\"age\":13,\"name\":\"ddd\"}\n{\"age\":45,\"name\":\"eee\"}\n{\"age\":18,\"name\":\"fff\"}\n{\"age\":22,\"name\":\"ggg\"}\n{\"age\":15,\"name\":\"hhh\"}\n{\"age\":24,\"name\":\"iii\"}\n...<\/code><\/pre>\n\n\n\n
\u3068\u7f6e\u304d\u307e\u3059\u3002
\u305d\u306e\u5f8c\u3001\u30bf\u30fc\u30df\u30ca\u30eb\u306b\u3066
test_app $ iex -S mix<\/code>
iex(1)>test_app.main<\/code>
\u3068\u6253\u3064\u3068\u300120\u6b73\u4ee5\u4e0b\u306e\u4eba\u6570\u304c\u51fa\u3066\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u3055\u3066\u3001Elixir\u306b\u306f\u30d1\u30a4\u30d7\u6f14\u7b97\u5b50\u3068\u3044\u3046\u306e\u304c\u3042\u308b\u3089\u3057\u304f\u3001\u524d\u306e\u95a2\u6570\u306e\u8fd4\u6570\u3092\u7b2c\u4e00\u5f15\u6570\u3068\u3057\u3066\u6e21\u3057\u305f\u3044\u6642\u306b\u4f7f\u3048\u308b\u3089\u3057\u3044\u3067\u3059\u3002\u4e0a\u306e\u30b3\u30fc\u30c9\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u66f8\u304d\u76f4\u305b\u307e\u3059\u3002<\/p>\n\n\n\n
def main do\n  \"d.json\"\n  |> File.stream!\n  |> Enum.map(fn d -> Poison.decode!(d) end)\n  |> Enum.filter(fn d -> d[\"age\"] <= 20 end)\n  |> Enum.count\nend<\/code><\/pre>\n\n\n\n
\u307e\u3042\u3001\u3053\u306e\u3088\u3046\u306b\u8272\u3005\u6559\u3048\u3066\u3082\u3089\u3063\u3066Enum\u3058\u3083\u306a\u304f\u3066Stream\u3084Flow\u4f7f\u3046\u3068\u826f\u3044\u3088\u306a\u3069\u6559\u3048\u3066\u3082\u3089\u3044\u307e\u3057\u305f\u3002<\/p>\n\n\n\n
\u611f\u60f3<\/h3>\n\n\n\n
Elixir\u672c\u3092\u8aad\u3093\u3060\u3068\u304d\u306f\u3001\u300c\u4ed6\u8a00\u8a9e\u3068\u306f\u9055\u3046\u305e\u301c\u300d\u3068\u3044\u3046\u3053\u3068\u304c\u975e\u5e38\u306b\u591a\u304f\u66f8\u304b\u308c\u3066\u307e\u3057\u305f\u304c\u3001\u30c9\u30ea\u30b3\u30e0\u793e\u3055\u3093\u306e\u304a\u304b\u3052\u3067\u30b9\u30e0\u30fc\u30ba\u306b\u7406\u89e3\u3067\u304d\u307e\u3057\u305f\u3002\u3082\u3061\u308d\u3093Elixir\u306e\u4e00\u89d2\u3060\u3068\u601d\u3044\u307e\u3059\u304c\u3001\u5c11\u3057\u305a\u3064\u3084\u3063\u3066\u3044\u3053\u3046\u3068\u601d\u3044\u307e\u3059\u3002
\u305f\u3060\u3001\u95a2\u6570\u3063\u307d\u3044\u90e8\u5206\u3068\u305d\u3046\u3067\u306a\u3044\u90e8\u5206\u3068\u304c\u5999\u306b\u7a81\u3063\u639b\u304b\u308b\u3068\u8a00\u3046\u304b…\u307e\u3042\u6163\u308c\u304b\u306a…<\/p>\n\n\n\n
\u3042\u3068\u4eca\u56de\u306e\u4ef6\u3067\u3001map=>filter\u3092\u884c\u3044\u307e\u3057\u305f\u304c\u3001filter\u4e00\u500b\u3067\u3082\u884c\u3051\u308b\u3093\u3058\u3083\u306a\u3044\u304b\u306a\u3068\u601d\u3063\u3066\u5c11\u3057\u7591\u554f…\u5177\u4f53\u7684\u306b\u306f<\/p>\n\n\n\n
  def is_adult (json_text) do\n    data = Poison.decode!(json_text)\n    data[\"age\"] <= 20\n  end\n\n  def main do\n    \"data.json\"\n    |> File.stream!\n    |> Enum.filter(fn d -> is_adult(d) end)\n    |> Enum.count\n  end<\/code><\/pre>\n\n\n\n
\u3066\u66f8\u3044\u3066\u3082\u52d5\u304f\u306e\u3067\u3069\u3046\u304b\u306a\u301c\u3068\u3001\u3088\u304f\u5206\u304b\u3063\u3066\u306a\u3044\u3002
\u307e\u3042\u3001\u3053\u308c\u304b\u3089\u30dc\u30c1\u30dc\u30c1\u3084\u3063\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u30c9\u30ea\u30b3\u30e0\u793e\u3055\u3093\u304c\u958b\u50ac\u3057\u3066\u304f\u3060\u3055\u3063\u305f\u3010\u30b5\u30fc\u30d0\u30fc\u30b5\u30a4\u30c9\u8b1b\u7fa9\uff06\u5b9f\u6280\u3011Elixir\u30cf\u30f3\u30ba\u30aa\u30f3\u306b\u53c2\u52a0\u3057\u3066\u304d\u307e\u3057\u305f\u3002\u305d\u3053\u3067\u306e\u611f\u60f3\u3084Elixir\u306e\u611f\u60f3\u306a\u3069\u3092\u66f8\u3053\u3046\u3068\u601d\u3044\u307e\u3059\u3002 Elixir\u3068\u306f Elixir\u306f\u62e1\u5f35\u6027\u3068\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30a2\u30d7\u30ea […]<\/p>\n","protected":false},"author":1,"featured_media":609,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-603","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-programming"],"_links":{"self":[{"href":"https:\/\/pg-mana.net\/blog\/wp-json\/wp\/v2\/posts\/603","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pg-mana.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pg-mana.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pg-mana.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/pg-mana.net\/blog\/wp-json\/wp\/v2\/comments?post=603"}],"version-history":[{"count":0,"href":"https:\/\/pg-mana.net\/blog\/wp-json\/wp\/v2\/posts\/603\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pg-mana.net\/blog\/wp-json\/wp\/v2\/media\/609"}],"wp:attachment":[{"href":"https:\/\/pg-mana.net\/blog\/wp-json\/wp\/v2\/media?parent=603"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pg-mana.net\/blog\/wp-json\/wp\/v2\/categories?post=603"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pg-mana.net\/blog\/wp-json\/wp\/v2\/tags?post=603"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}