{"id":2688,"date":"2021-10-30T09:04:58","date_gmt":"2021-10-30T00:04:58","guid":{"rendered":"https:\/\/suzutukiblog.com\/?p=2688"},"modified":"2022-01-20T23:05:27","modified_gmt":"2022-01-20T14:05:27","slug":"ruby-3","status":"publish","type":"post","link":"https:\/\/suzutukiblog.com\/index.php\/2021\/10\/30\/ruby-3\/","title":{"rendered":"Ruby\u306e\u307e\u3068\u30813(\u914d\u5217\u304b\u3089\u30cf\u30c3\u30b7\u30e5Date,Time\u307e\u3067)"},"content":{"rendered":"

\uff12\u304b\u3089\u7d9a\u304f<\/a><\/p>\n

\u914d\u5217(Array)<\/h3>\n

\u8907\u6570\u306e\u30c7\u30fc\u30bf\u3092\u307e\u3068\u3081\u3066\u683c\u7d0d\u3067\u304d\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u3053\u3068<\/p>\n

\u914d\u5217\u5185\u306e\u30c7\u30fc\u30bf(\u8981\u7d20)\u306f\u9806\u756a\u306b\u4e26\u3093\u3067\u3044\u3066\u6dfb\u5b57(\u30a4\u30f3\u30c7\u30c3\u30af\u30b9)
\n\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3067\u30c7\u30fc\u30bf\u3092\u53d6\u308a\u51fa\u305b\u308b<\/p>\n

\u914d\u5217\u306e\u4f5c\u6210<\/h3>\n

\u7a7a\u306e\u914d\u5217\u3092\u4f5c\u308b[]<\/p>\n

3\u3064\u306e\u8981\u7d20\u304c\u683c\u7d0d\u3055\u308c\u305f\u914d\u5217\u3092\u4f5c\u308b
\n[\u8981\u7d201,\u8981\u7d202,\u8981\u7d203]<\/p>\n

arr = []\r\n=> []\r\narr\r\n=> []\r\n\r\na = [1, 2, 3, 'aa', [1, 2, 3]]\r\n=> [1, 2, 3, \"aa\", [1, 2, 3]]\r\n2.5.1 :006 > a[0]\r\n=> 1\r\n2.5.1 :007 > a[1]\r\n=> 2\r\n2.5.1 :008 > puts a\r\n1\r\n2\r\n3\r\naa\r\n1\r\n2\r\n3\r\n=> nil\r\n\r\n\u5c0f\u6587\u5b57\u306ew\u306f\u30b7\u30f3\u30b0\u30eb\u30af\u30a9\u30fc\u30c8\u3068\u304a\u306a\u3058\u3067\r\n%w(a b)\r\n=> [\"a\", \"b\"]\r\n\u5927\u6587\u5b57\u306eW\u306f\u30c0\u30d6\u30eb\u30af\u30a9\u30fc\u30c8\u3068\u304a\u306a\u3058\u3067\u5f0f\u5c55\u958b\u3067\u304d\u308b\r\na = 1\r\n=> 1\r\nb = 2\r\n=> 2\r\n\r\n%W(\u3042#{a} \u3044#{b})\r\n=> [\"\u30421\", \"\u30442\"]\r\n\r\n\u30b7\u30f3\u30dc\u30eb\u306b\u5909\u63db\u3082\u3067\u304d\u308b\r\n%i[ a b c ]\r\n=> [:a, :b, :c]\r\n\r\n\u7e70\u308a\u8fd4\u3057\u51e6\u7406\u3092\u3059\u308b\u6642\r\n%w[a b c].each do |abc|\r\n   puts abc\r\n end \r\na\r\nb\r\nc\r\n=> [\"a\", \"b\", \"c\"]\r\n\r\nbreak\u306f\u6307\u5b9a\u3057\u305f\u3082\u306e\u307e\u3067\u7e70\u308a\u8fd4\u3059\r\n%w[a b c].each do |abc|\r\n   break if abc == 'c'\r\n   puts abc\r\n end \r\na\r\nb\r\n=> nil\r\n\r\nnext\u306f\u6307\u5b9a\u3057\u305f\u3082\u306e\u3092\u30b9\u30ad\u30c3\u30d7\u3059\u308b\r\n%w[a b c].each do |abc|\r\n    next if abc == 'b' \r\n      puts abc \r\n    end \r\na\r\nc\r\n=> [\"a\", \"b\", \"c\"]\r\n\r\nmap\u3092\u4f7f\u3063\u3066\u914d\u5217\u5185\u306b()\u3092\u4ed8\u52a0\r\n%w[a b c].map { |abc| \"(#{abc})\" }\r\n=> [\"(a)\", \"(b)\", \"(c)\"]\r\n\r\n<\/pre>\n
a\u306f\u7a7a\u304b\uff1f(.empty)<\/h3>\n
a.empty?\r\n=> false\r\n2.5.1 :010 > b = []\r\n=> []\r\n2.5.1 :011 > b.empty?\r\n=> true<\/pre>\n
\u5909\u6570a\u306b’aa’\u306f\u3075\u304f\u307e\u308c\u3066\u3044\u308b\uff1f(.include)<\/h3>\n
2.5.1 :012 > a.include?('aa')\r\n=> true\r\n2.5.1 :013 > a.include?('b')\r\n=> false<\/pre>\n
a = [[1, 2, 3], \"aa\", 3, 2, 1]\r\n2.5.1 :014 > a.reverse\r\n=> [[1, 2, 3], \"aa\", 3, 2, 1]\r\n2.5.1 :015 > a\r\n=> [1, 2, 3, \"aa\", [1, 2, 3]]\r\n2.5.1 :016 > a.reverse!\r\n=> [[1, 2, 3], \"aa\", 3, 2, 1]\r\n2.5.1 :017 > a\r\n=> [[1, 2, 3], \"aa\", 3, 2, 1]<\/pre>\n
\u914d\u5217\u3092\u30e9\u30f3\u30c0\u30e0\u306b\u3059\u308b(.shuffle)<\/h3>\n
2.5.1 :018 > a.shuffle\r\n=> [3, 2, \"aa\", 1, [1, 2, 3]]\r\n\r\n(0..25).to_a\r\n=> [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25]\r\n2.5.1 :026 > (0..99).to_a.shuffle!\r\n=> [96, 92, 23, 49, 27, 60, 20, 72, 8,\r\n50, 70, 64, 41, 75, 88, 26, 82, 14, 6,\r\n78, 10, 55, 74, 48, 17, 52, 24, 16, 95,\r\n63, 36, 19, 91, 93, 57, 85, 56, 67, 2,\r\n15, 89, 44, 31, 43, 98, 3, 38, 28, 12,\r\n86, 35, 65, 83, 94, 47, 0, 81, 4, 62,\r\n77, 84, 13, 90, 33, 45, 21, 99, 39, 22,\r\n71, 46, 61, 66, 87, 25, 30, 29, 34, 51,\r\n73, 68, 18, 69, 37, 80, 11, 7, 9, 58, 5,\r\n53, 42, 1, 40, 79, 59, 32, 54, 76, 97]<\/pre>\n
\u914d\u5217\u306b\u65b0\u3057\u304f\u5165\u308c\u308b(.push)(<<)<\/h3>\n
z = (0..10).to_a\r\n\r\n=> [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]\r\n\r\n2.5.1 :028 > z << 20\r\n\r\n=> [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20]\r\n\r\n2.5.1 :029 > z\r\n\r\n=> [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20]\r\n\r\n2.5.1 :030 > z.push(30)\r\n\r\n=> [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30]\r\n\r\n2.5.1 :031 > z\r\n\r\n=> [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30]<\/pre>\n
\u914d\u5217\u306e\u6700\u5f8c\u3092\u53d6\u308a\u51fa\u3059(.pop)<\/h3>\n
2.5.1 :032 > z.pop\r\n=> 30\r\n2.5.1 :033 > z\r\n=> [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20]<\/pre>\n
\u6700\u521d\u306e\u914d\u5217\u3092\u53d6\u308a\u51fa\u3059(.shift)<\/h3>\n
z.shift\r\n=> 0\r\nz\r\n=> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20]\r\n\r\n2.5.1 :038 > z << 3\r\n\r\n=> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 3]\r\n\r\n2.5.1 :039 > z << 6\r\n\r\n=> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 3, 6]<\/pre>\n
\u91cd\u8907\u3057\u305f\u3082\u306e\u304c\u306a\u304f\u306a\u308a\u4e00\u3064\u306b\u307e\u3068\u307e\u308b(.uniq)<\/h3>\n
2.5.1 :040 > z.uniq\r\n=> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20]\r\n2.5.1 :041 > z\r\n=> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 3, 6]\r\n2.5.1 :042 > z.uniq!\r\n=> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20]\r\n2.5.1 :043 > z\r\n=> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20]<\/pre>\n
\u914d\u5217\u306e\u6587\u5b57\u5217\u3092\u7d50\u5408\u3059\u308b(.join)\u4e26\u3073\u66ff\u3048\u308b(.sort)<\/h3>\n
s = ['my' 'name' 'is' 'suzutuki']\r\n\r\ns\r\n\r\n=> [\"my\", \"name\", \"is\", \"suzutuki\"]\r\n\r\n2.5.1 :048 > s.join\r\n\r\n=> \"mynameissuzutuki\"\r\n\r\n2.5.1 :049 > s.join(' ')\r\n\r\n=> \"my name is suzutuki\"\r\n\r\n2.5.1 :050 > s.join('_')\r\n\r\n=> \"my_name_is_suzutuki\"\r\n\r\ns.sort.reverse\r\n\r\n=> [\"suzutuki\", \"name\", \"my\", \"is\"]\r\n\r\n2.5.1 :053 > s.sort.reverse!\r\n\r\n=> [\"suzutuki\", \"name\", \"my\", \"is\"]\r\n\r\n2.5.1 :054 > s\r\n\r\n=> [\"my\", \"name\", \"is\", \"suzutuki\"]<\/pre>\n
\u2193\u914d\u5217\u306e\u6570\u304c\u308f\u304b\u308b\r\ns.size\r\n=> 4<\/pre>\n
\u30b7\u30f3\u30dc\u30eb<\/h3>\n
\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u4e0a\u3067\u306f\u6587\u5b57\u5217\u306e\u3088\u3046\u306b\u898b\u3048\u308b\u304c\u5185\u90e8\u3067\u306f\u6574\u6570\u3068\u3057\u3066\u6271\u308f\u308c\u308b\u3002<\/p>\n
\u30b7\u30f3\u30dc\u30eb\u3092\u4f7f\u3063\u305f\u5f62\u306e\u65b9\u304c\u6587\u5b57\u5217\u3092\u304d\u308c\u3044\u306b\u4f7f\u3046\u5834\u5408\u306b\u6bd4\u3079\u3066\u3001\u30cf\u30c3\u30b7\u30e5\u306e\u30a2\u30af\u30bb\u30b9\u306f\u901f\u3044\u3068\u3055\u308c\u308b<\/p>\n
\"\"<\/p>\n
\n
\u30aa\u30d6\u30b8\u30a7\u30af\u30c8ID\u3092\u78ba\u8a8d\u3059\u308b\u3068\u3001String \u30aa\u30d6\u30b8\u30a7\u30af\u30c8 \u3067 \u306f \u540c\u3058 \u6587\u5b57\u5217\u3067\u3042\u3063\u3066\u3082\u5225\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u751f\u6210\u3055\u308c\u308b\u306e\u306b\u5bfe\u3057\u3066\u30b7\u30f3\u30dc\u30eb\u3067\u306f\u540c\u3058\u30b7\u30f3\u30dc\u30eb<\/span>\u540d\u3067\u3042\u308c\u3070\u540c\u4e00\u306e\u30b7\u30f3\u30dc\u30eb\u3092\u6307\u3057\u3066\u3044\u308b\u3002<\/span><\/p>\n
\u30cf\u30c3\u30b7\u30e5\u3068\u306f\uff1f<\/h3>\n
\u30ad\u30fc(key)\u3068\u5024(Value)\u306e\u7d44\u307f\u5408\u308f\u305b\u3067\u30c7\u30fc\u30bf\u3092\u7ba1\u7406\u3059\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/p>\n
\u9023\u60f3\u914d\u5217\u3001\u30c7\u30a3\u30af\u30b7\u30e7\u30ca\u30ea\u30fc\u3001\u30de\u30c3\u30d7\u3068\u8a00\u3046\u5834\u5408\u3082<\/p>\n
\u30cf\u30c3\u30b7\u30e5\u306e\u4f5c\u6210<\/h3>\n
\u7a7a\u306e\u30cf\u30c3\u30b7\u30e5\u3092\u4f5c\u6210\uff5b\uff5d(\u4e2d\u304b\u3063\u3053\u3068\u8aad\u3080)<\/p>\n
\u30ad\u30fc\u3068\u5024\u306e\u7d44\u307f\u5408\u308f\u305b\u30923\u3064\u683c\u7d0d\u3059\u308b\u30cf\u30c3\u30b7\u30e5\u3092\u4f5c\u6210<\/p>\n
\uff5b\u30ad\u30fc1\u3000=>\u3000\u50241,\u3000\u30ad\u30fc2\u3000=>\u3000\u50242,\u3000\u30ad\u30fc3\u3000=>\u3000\u50243 }<\/p>\n
suzutuki = {'name' => 'suzutuki', 'birthplace' => 'Gihu'}\r\n\r\n=> {\"name\"=>\"suzutuki\", \"birthplace\"=>\"Gihu\"}\r\n\r\n2.5.1 :058 > puts suzutuki['name']\r\n\r\nsuzutuki\r\n=> nil\r\n\r\n2.5.1 :059 > puts suzutuki['birthplace']\r\n\r\nGihu\r\n=> nil\r\n\r\n2.5.1 :060 > suzutuki['age'] = 18\r\n=> 18\r\n\r\n2.5.1 :061 > puts suzutuki\r\n{\"name\"=>\"suzutuki\", \"birthplace\"=>\"Gihu\", \"age\"=>18}\r\n=> nil\r\n\r\n\u2193age\u309220\u306b\u5909\u66f4\u3057\u305f\u3044\u3068\u304d\r\nsuzutuki['age'] = 20\r\n=> 20\r\n\r\n2.5.1 :063 > puts suzutuki\r\n{\"name\"=>\"suzutuki\", \"birthplace\"=>\"Gihu\", \"age\"=>20}\r\n=> nil\r\n\r\nsuzutuki.delete('age')\r\n=> 20\r\n\r\nputs suzutuki\r\n{\"name\"=>\"suzutuki\", \"birthplace\"=>\"Gihu\"}\r\n=> nil<\/pre>\n<\/div>\n
ota = {name: 'ota', birthplace: 'tokyo'}\r\n=> {:name=>\"ota\", :birthplace=>\"tokyo\"}\r\n2.5.1 :067 > puts ota[:name]\r\nota\r\n=> nil\r\n2.5.1 :068 > ota[:age] = 20\r\n=> 20\r\n2.5.1 :070 > ota[:age] = 21\r\n=> 21\r\n2.5.1 :072 > puts ota\r\n{:name=>\"ota\", :birthplace=>\"tokyo\", :age=>21}\r\n=> nil\r\n2.5.1 :073 > ota.delete(:age)\r\n=> 21\r\nputs ota\r\n{:name=>\"ota\", :birthplace=>\"tokyo\"}\r\n=> nil\r\n\r\n<\/pre>\n
\u30ad\u30fc\u306e\u78ba\u8a8d.keys<\/p>\n
ota.keys\r\n=> [:name, :birthplace]<\/pre>\n
\u5024\u306e\u78ba\u8a8d.values<\/p>\n
2.5.1 :075 > ota.values\r\n=> [\"ota\", \"tokyo\"]\r\n2.5.1 :076 > ota.has_key?(:name)\r\n=> true\r\n2.5.1 :077 > ota.has_key?(:address)\r\n=> false\r\n2.5.1 :078 > ota.size\r\n=> 2<\/pre>\n
Time,Date\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/h3>\n
 Time.now\r\n=> 2021-010-02 12:06:55 +0900\r\n[6] pry(main)> Time.now.zone\r\n=> \"JST\"\r\n[7] pry(main)> datetime = Time.new(2021, 10, 2, 12, 45)\r\n=> 2021-01-02 12:45:00 +0900\r\n[8] pry(main)> datetime.strftime('%Y\u5e74 %m\u6708 %d\u65e5 %H\u6642 %M\u5206')\r\n=> \"2021\u5e74 10\u6708 02\u65e5 12\u6642 45\u5206\"\r\n\r\n\u3044\u304d\u306a\u308aDate\u30af\u30e9\u30b9\u306f\u4f7f\u3048\u306a\u3044\r\n[9] pry(main)> Date\r\nNameError: uninitialized constant Date\r\nDid you mean? Data\r\nfrom (pry):12:in `__pry__'\r\nrequire\u3092\u3059\u308b\u3053\u3068\u3067\u4f7f\u3048\u308b\u3088\u3046\u306b\u306a\u308b\r\n[10] pry(main)> require 'date'\r\n=> true\r\n[11] pry(main)> Date\r\n=> Date\r\nDate.today\r\n=> #<Date: 2021-01-02 ((2459317j,0s,0n),+0s,2299161j)>\r\n[15] pry(main)> Date.new(2021, 10, 2)\r\n=> #<Date: 2021-01-02 ((2459217j,0s,0n),+0s,2299161j)>\r\n\r\n[17] pry(main)> Date.new(2021, 10, 2).strftime('%Y\u5e74 %m\u6708 %d\u65e5 %H\u6642 %M\u5206')\r\n=> \"2021\u5e74 10\u6708 02\u65e5 00\u6642 00\u5206\"\r\n\r\n<\/pre>\n
\uff14\u306b\u7d9a\u304f<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
\uff12\u304b\u3089\u7d9a\u304f \u914d\u5217(Array) \u8907\u6570\u306e\u30c7\u30fc\u30bf\u3092\u307e\u3068\u3081\u3066\u683c\u7d0d\u3067\u304d\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u3053\u3068 \u914d\u5217\u5185\u306e\u30c7\u30fc\u30bf(\u8981\u7d20)\u306f\u9806\u756a\u306b\u4e26\u3093\u3067\u3044\u3066\u6dfb\u5b57(\u30a4\u30f3\u30c7\u30c3\u30af\u30b9) \u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3067\u30c7\u30fc\u30bf\u3092\u53d6\u308a\u51fa\u305b\u308b \u914d\u5217\u306e\u4f5c\u6210 \u7a7a\u306e\u914d\u5217\u3092\u4f5c\u308b[] 3\u3064\u306e […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[27,31],"tags":[],"class_list":["post-2688","post","type-post","status-publish","format-standard","hentry","category-programming-note","category-ruby"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/posts\/2688","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/comments?post=2688"}],"version-history":[{"count":6,"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/posts\/2688\/revisions"}],"predecessor-version":[{"id":4479,"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/posts\/2688\/revisions\/4479"}],"wp:attachment":[{"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/media?parent=2688"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/categories?post=2688"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/tags?post=2688"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}