{"id":5154,"date":"2023-03-15T09:00:05","date_gmt":"2023-03-15T00:00:05","guid":{"rendered":"https:\/\/meister-kentei.jp\/magazine\/?p=5154"},"modified":"2023-03-14T15:39:18","modified_gmt":"2023-03-14T06:39:18","slug":"ruby%e3%81%ae%e9%85%8d%e5%88%97%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%ef%bc%81%e5%9f%ba%e6%9c%ac%e6%93%8d%e4%bd%9c%e3%81%a8%e4%be%bf%e5%88%a9%e3%81%aa%e3%83%a1%e3%82%bd%e3%83%83%e3%83%89%e3%82%92","status":"publish","type":"post","link":"https:\/\/meister-kentei.jp\/magazine\/programming\/5154\/","title":{"rendered":"Ruby\u306e\u914d\u5217\u306e\u4f7f\u3044\u65b9\uff01\u57fa\u672c\u64cd\u4f5c\u3068\u4fbf\u5229\u306a\u30e1\u30bd\u30c3\u30c9\u3092\u89e3\u8aac\u3057\u307e\u3059"},"content":{"rendered":"<div id=\"toc_container\" class=\"toc_white no_bullets\"><p class=\"toc_title\">\u76ee\u6b21<\/p><ul class=\"toc_list\"><li><a href=\"#Ruby\"><span class=\"toc_number toc_depth_1\">1<\/span> Ruby\u306b\u304a\u3051\u308b\u914d\u5217\u3068\u306f<\/a><ul><li><a href=\"#i\"><span class=\"toc_number toc_depth_2\">1.1<\/span> \u914d\u5217\u3068\u306f<\/a><\/li><li><a href=\"#Ruby-2\"><span class=\"toc_number toc_depth_2\">1.2<\/span> Ruby\u306e\u914d\u5217\u306e\u4f7f\u3044\u65b9<\/a><\/li><\/ul><\/li><li><a href=\"#Ruby-3\"><span class=\"toc_number toc_depth_1\">2<\/span> Ruby\u306b\u304a\u3051\u308b\u914d\u5217\u306e\u57fa\u672c\u64cd\u4f5c<\/a><ul><li><a href=\"#i-2\"><span class=\"toc_number toc_depth_2\">2.1<\/span> \u914d\u5217\u306e\u751f\u6210<\/a><\/li><li><a href=\"#i-3\"><span class=\"toc_number toc_depth_2\">2.2<\/span> \u914d\u5217\u306e\u53d6\u5f97<\/a><\/li><li><a href=\"#i-4\"><span class=\"toc_number toc_depth_2\">2.3<\/span> \u914d\u5217\u306e\u8ffd\u52a0<\/a><\/li><li><a href=\"#i-5\"><span class=\"toc_number toc_depth_2\">2.4<\/span> \u914d\u5217\u306e\u66f4\u65b0<\/a><\/li><li><a href=\"#i-6\"><span class=\"toc_number toc_depth_2\">2.5<\/span> \u914d\u5217\u306e\u524a\u9664<\/a><\/li><\/ul><\/li><li><a href=\"#Ruby-4\"><span class=\"toc_number toc_depth_1\">3<\/span> Ruby\u914d\u5217\u306e\u4fbf\u5229\u306a\u30e1\u30bd\u30c3\u30c9<\/a><ul><li><a href=\"#each\"><span class=\"toc_number toc_depth_2\">3.1<\/span> each\u30e1\u30bd\u30c3\u30c9<\/a><\/li><li><a href=\"#uniq\"><span class=\"toc_number toc_depth_2\">3.2<\/span> uniq\u30e1\u30bd\u30c3\u30c9<\/a><\/li><li><a href=\"#select\"><span class=\"toc_number toc_depth_2\">3.3<\/span> select\u30e1\u30bd\u30c3\u30c9<\/a><\/li><li><a href=\"#lengthsize\"><span class=\"toc_number toc_depth_2\">3.4<\/span> length\u30e1\u30bd\u30c3\u30c9\u30fbsize\u30e1\u30bd\u30c3\u30c9<\/a><\/li><li><a href=\"#count\"><span class=\"toc_number toc_depth_2\">3.5<\/span> count\u30e1\u30bd\u30c3\u30c9<\/a><\/li><li><a href=\"#map\"><span class=\"toc_number toc_depth_2\">3.6<\/span> map\u30e1\u30bd\u30c3\u30c9<\/a><\/li><li><a href=\"#empty\"><span class=\"toc_number toc_depth_2\">3.7<\/span> empty?\u30e1\u30bd\u30c3\u30c9<\/a><\/li><li><a href=\"#any\"><span class=\"toc_number toc_depth_2\">3.8<\/span> any?\u30e1\u30bd\u30c3\u30c9<\/a><\/li><li><a href=\"#all\"><span class=\"toc_number toc_depth_2\">3.9<\/span> all?\u30e1\u30bd\u30c3\u30c9<\/a><\/li><li><a href=\"#include\"><span class=\"toc_number toc_depth_2\">3.10<\/span> include?\u30e1\u30bd\u30c3\u30c9<\/a><\/li><\/ul><\/li><li><a href=\"#Ruby-5\"><span class=\"toc_number toc_depth_1\">4<\/span> Ruby\u914d\u5217\u306e\u6f14\u7b97<\/a><ul><li><a href=\"#i-7\"><span class=\"toc_number toc_depth_2\">4.1<\/span> \u914d\u5217\u306e\u7a4d\u96c6\u5408<\/a><\/li><li><a href=\"#i-8\"><span class=\"toc_number toc_depth_2\">4.2<\/span> \u914d\u5217\u306e\u548c\u96c6\u5408<\/a><\/li><li><a href=\"#i-9\"><span class=\"toc_number toc_depth_2\">4.3<\/span> \u914d\u5217\u306e\u5dee\u96c6\u5408<\/a><\/li><li><a href=\"#i-10\"><span class=\"toc_number toc_depth_2\">4.4<\/span> \u914d\u5217\u306e\u8981\u7d20\u7e70\u308a\u8fd4\u3057<\/a><\/li><li><a href=\"#i-11\"><span class=\"toc_number toc_depth_2\">4.5<\/span> \u914d\u5217\u306e\u9023\u7d50<\/a><\/li><\/ul><\/li><li><a href=\"#i-12\"><span class=\"toc_number toc_depth_1\">5<\/span> \u307e\u3068\u3081<\/a><\/li><\/ul><\/div>\n<p><span class=\"marker\">\u914d\u5217<\/span>\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3051\u308b\u57fa\u672c\u7684\u306a\u8981\u7d20\u306e1\u3064\u3067\u3059\u3002\u914d\u5217\u306f\u4f7f\u3046\u5834\u9762\u3082\u591a\u304f\u3001\u4f7f\u3044\u65b9\u3092\u6b63\u78ba\u306b\u628a\u63e1\u3057\u3066\u304a\u304b\u306a\u3051\u308c\u3070\u3001\u601d\u308f\u306c\u30a8\u30e9\u30fc\u306b\u3064\u306a\u304c\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u672c\u8a18\u4e8b\u3067\u306f\u3001<span class=\"marker\">Ruby<\/span>\u306b\u304a\u3051\u308b\u914d\u5217\u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002\u57fa\u672c\u7684\u306a\u64cd\u4f5c\u3068\u4fbf\u5229\u306a\u5404\u7a2e\u30e1\u30bd\u30c3\u30c9\u3001\u6f14\u7b97\u5b50\u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u89e3\u8aac\u3059\u308b\u306e\u3067\u3001\u305c\u3072\u53c2\u8003\u306b\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h2><span id=\"Ruby\">Ruby\u306b\u304a\u3051\u308b\u914d\u5217\u3068\u306f<\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-5163\" src=\"https:\/\/meister-kentei.jp\/magazine\/wp-content\/uploads\/2023\/03\/26027758_s.jpg\" alt=\"\" width=\"640\" height=\"427\" \/><\/p>\n<p>\u914d\u5217\u306f\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u306b\u5099\u308f\u3063\u3066\u3044\u308b\u57fa\u672c\u7684\u306a\u8981\u7d20\u306e1\u3064\u3067\u3001Ruby\u306b\u9650\u3089\u305a\u307b\u3068\u3093\u3069\u306e\u8a00\u8a9e\u3067\u4f7f\u308f\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u307e\u305a\u3001\u4e00\u822c\u7684\u306b\u914d\u5217\u3068\u306f\u3069\u306e\u3088\u3046\u306a\u3082\u306e\u306a\u306e\u304b\u3092\u89e3\u8aac\u3057\u3001Ruby\u306b\u304a\u3051\u308b\u914d\u5217\u306e\u6271\u3044\u306b\u3064\u3044\u3066\u7c21\u5358\u306b\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<h3><span id=\"i\">\u914d\u5217\u3068\u306f<\/span><\/h3>\n<p>\u305d\u3082\u305d\u3082\u914d\u5217\u3068\u306f\u4e00\u4f53\u4f55\u306a\u306e\u3067\u3057\u3087\u3046\u304b\u3002\u914d\u5217\u3068\u306f\u3001<span class=\"marker\">\u8907\u6570\u306e\u30c7\u30fc\u30bf\u306b\u756a\u53f7\u3092\u5272\u308a\u632f\u3063\u3066\u7ba1\u7406\u3059\u308b\u30c7\u30fc\u30bf\u69cb\u9020<\/span>\u3092\u6307\u3057\u307e\u3059\u3002\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u30c7\u30fc\u30bf\u3092\u7ba1\u7406\u3059\u308b\u969b\u3001\u8907\u6570\u306e\u30c7\u30fc\u30bf\u3092\u307e\u3068\u3081\u3066\u3001\u96c6\u5408\u3068\u3057\u3066\u6271\u3046\u3053\u3068\u304c\u3088\u304f\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u30c7\u30fc\u30bf\u69cb\u9020\u306b\u306f\u69d8\u3005\u306a\u7a2e\u985e\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u914d\u5217\u306f\u5148\u982d\u304b\u3089\u9806\u306b\u5272\u308a\u5f53\u3066\u3089\u308c\u305f\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u756a\u53f7\u3092\u4f7f\u3063\u3066\u8981\u7d20\u3092\u7ba1\u7406\u3057\u307e\u3059\u3002\u5272\u308a\u632f\u3089\u308c\u305f\u756a\u53f7\u3092\u5143\u306b\u8981\u7d20\u306e\u5024\u3092\u53d6\u5f97\u3057\u305f\u308a\u66f4\u65b0\u3001\u8ffd\u52a0\u3057\u305f\u308a\u3001\u524a\u9664\u3057\u305f\u308a\u3068\u3044\u3063\u305f\u51e6\u7406\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<h3><span id=\"Ruby-2\">Ruby\u306e\u914d\u5217\u306e\u4f7f\u3044\u65b9<\/span><\/h3>\n<p>Ruby\u306b\u304a\u3051\u308b\u914d\u5217\u306f\u3001<span class=\"marker\">\u300cArray\u300d<\/span>\u3068\u3044\u3046\u30af\u30e9\u30b9\u3067\u6271\u3044\u307e\u3059\u3002<\/p>\n<p>Array\u3082\u4ed6\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3068\u540c\u3058\u304f\u3001\u5404\u8981\u7d20\u306b<span class=\"marker\">\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u756a\u53f7<\/span>\u3092\u5272\u308a\u632f\u3063\u3066\u7ba1\u7406\u3057\u307e\u3059\u3002\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u756a\u53f7\u306f0\u304b\u3089\u59cb\u307e\u308b\u305f\u3081\u30011\u3064\u76ee\u306e\u8981\u7d20\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u756a\u53f7\u306f0\u30012\u3064\u76ee\u306e\u8981\u7d20\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u756a\u53f7\u304c1\u306b\u306a\u308b\u3001\u3068\u3044\u3046\u70b9\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h2><span id=\"Ruby-3\">Ruby\u306b\u304a\u3051\u308b\u914d\u5217\u306e\u57fa\u672c\u64cd\u4f5c<\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-5164\" src=\"https:\/\/meister-kentei.jp\/magazine\/wp-content\/uploads\/2023\/03\/23787025_s.jpg\" alt=\"\" width=\"640\" height=\"427\" \/><\/p>\n<p>\u305d\u308c\u3067\u306f\u3001\u5b9f\u969b\u306bRuby\u306b\u304a\u3051\u308b\u914d\u5217\u306e\u57fa\u672c\u64cd\u4f5c\u3092\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002\u4eca\u56de\u306f\u3001\u57fa\u672c\u64cd\u4f5c\u3068\u3057\u3066\u4ee5\u4e0b\u306e5\u3064\u306e\u64cd\u4f5c\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<ul>\n<li>\u914d\u5217\u306e\u751f\u6210<\/li>\n<li>\u914d\u5217\u306e\u53d6\u5f97<\/li>\n<li>\u914d\u5217\u306e\u8ffd\u52a0<\/li>\n<li>\u914d\u5217\u306e\u66f4\u65b0<\/li>\n<li>\u914d\u5217\u306e\u524a\u9664<\/li>\n<\/ul>\n<h3><span id=\"i-2\">\u914d\u5217\u306e\u751f\u6210<\/span><\/h3>\n<p>\u307e\u305a\u306f\u914d\u5217\u3092\u751f\u6210\u3057\u307e\u3057\u3087\u3046\u3002\u914d\u5217\u306f\u3001<span class=\"marker\">[]\u3067\u8981\u7d20\u3092\u56f2\u3080<\/span>\u3053\u3068\u3067\u751f\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>array = []\r\narray_numbers = [1, 2, 3]<\/pre>\n<\/div>\n<p>\u307e\u305a\u306f\u3053\u306e2\u3064\u306e\u914d\u5217\u3092\u751f\u6210\u3057\u3066\u307f\u307e\u3059\u3002\u300carray\u300d\u3068\u3044\u3046\u540d\u524d\u306e\u7a7a\u306e\u914d\u5217\u3068\u3001\u300carray_numbers\u300d\u3068\u3044\u30463\u3064\u306e\u8981\u7d20\u304c\u5165\u3063\u305f\u914d\u5217\u3067\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>\u4f5c\u6210\u3055\u308c\u305f\u914d\u5217\u3092\u51fa\u529b\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002\r\n[]\r\n[1,\u00a0 2,\u00a0 3]<\/pre>\n<\/div>\n<p>\u3053\u308c\u3067\u914d\u5217\u306e\u751f\u6210\u304c\u3067\u304d\u307e\u3057\u305f\u3002\u914d\u5217\u306e\u4e2d\u306b\u306f\u3001\u6570\u5b57\u4ee5\u5916\u306b\u3082\u6587\u5b57\u5217\u3092\u5165\u308c\u305f\u308a\u3001\u3055\u3089\u306b\u914d\u5217\u3092\u5165\u308c\u305f\u308a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>array_animals = [\"dog\", \"cat\", \"mouse\"]\r\narray_array = [1, 2, [3, 4], 5, 6]<\/pre>\n<\/div>\n<p>\u305d\u308c\u305e\u308c\u306e\u51fa\u529b\u7d50\u679c\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>[\"dog\", \"cat\", \"mouse\"]\r\n[1, 2, [3, 4], 5, 6]<\/pre>\n<\/div>\n<h3><span id=\"i-3\">\u914d\u5217\u306e\u53d6\u5f97<\/span><\/h3>\n<p>\u914d\u5217\u306e\u8981\u7d20\u3092\u53d6\u5f97\u3059\u308b\u306b\u306f\u3001<span class=\"marker\">\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u756a\u53f7\u3092\u6307\u5b9a<\/span>\u3057\u307e\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>array = [1, 2, 3, 4, 5]\r\nputs array[0]\u00a0\r\nputs array[1]<\/pre>\n<\/div>\n<p>\u5b9f\u884c\u7d50\u679c\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>1\r\n2<\/pre>\n<\/div>\n<p>\u307e\u305f\u3001\u8ca0\u306e\u6570\u3067\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u6307\u5b9a\u3059\u308b\u3068\u3001\u914d\u5217\u306e\u6700\u5f8c\u304b\u3089\u4f4d\u7f6e\u3092\u6307\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>puts array[-1]<\/pre>\n<\/div>\n<p>\u3053\u306e\u5834\u5408\u306f\u3001\u5b9f\u884c\u7d50\u679c\u3068\u3057\u3066\u300c5\u300d\u304c\u8fd4\u3063\u3066\u304d\u307e\u3059\u3002<\/p>\n<h3><span id=\"i-4\">\u914d\u5217\u306e\u8ffd\u52a0<\/span><\/h3>\n<p>\u914d\u5217\u306b\u8981\u7d20\u3092\u8ffd\u52a0\u3059\u308b\u5834\u5408\u306f\u3001<span class=\"marker\">\u300cpush\u300d\u30e1\u30bd\u30c3\u30c9<\/span>\u307e\u305f\u306f<span class=\"marker\">\u300c&lt;&lt;\u300d\u6f14\u7b97\u5b50<\/span>\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u8981\u7d20\u306f\u914d\u5217\u306e\u672b\u5c3e\u306b\u8ffd\u52a0\u3055\u308c\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>array = [1, 2, 3, 4, 5]\r\narray.push(6)\r\nputs array.inspect\r\n\r\narray &lt;&lt; 7\r\nputs array.inspect<\/pre>\n<\/div>\n<p>\u305d\u308c\u305e\u308c\u306e\u5b9f\u884c\u7d50\u679c\u306f\u4ee5\u4e0b\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>[1, 2, 3, 4, 5, 6]\r\n[1, 2, 3, 4, 5, 6, 7]<\/pre>\n<\/div>\n<h3><span id=\"i-5\">\u914d\u5217\u306e\u66f4\u65b0<\/span><\/h3>\n<p>\u914d\u5217\u306e\u8981\u7d20\u3092\u5909\u66f4\u3059\u308b\u969b\u306f\u3001<span class=\"marker\">\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u756a\u53f7\u3092\u6307\u5b9a<\/span>\u3057\u3066\u4ee3\u5165\u3057\u307e\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>array = [1, 2, 3, 4, 5]\r\narray[0] = 10\r\nputs array.inspect<\/pre>\n<\/div>\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u756a\u53f70\u306e\u8981\u7d20\u306b10\u3068\u3044\u3046\u5024\u3092\u4ee3\u5165\u3057\u307e\u3057\u305f\u3002\u5b9f\u884c\u7d50\u679c\u306f\u4ee5\u4e0b\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>[10, 2, 3, 4, 5]<\/pre>\n<\/div>\n<h3><span id=\"i-6\">\u914d\u5217\u306e\u524a\u9664<\/span><\/h3>\n<p>\u6700\u5f8c\u306b\u3001\u914d\u5217\u306e\u8981\u7d20\u3092\u524a\u9664\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u914d\u5217\u306e\u8981\u7d20\u3092\u524a\u9664\u3059\u308b\u969b\u306f\u3001<span class=\"marker\">\u300cpop\u300d\u30e1\u30bd\u30c3\u30c9<\/span>\u304b<span class=\"marker\">\u300cdelete_at\u300d\u30e1\u30bd\u30c3\u30c9<\/span>\u3092\u4f7f\u3044\u307e\u3059\u3002<br \/>\n\u300cpop\u300d\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\u3068\u3001\u914d\u5217\u306e\u672b\u5c3e\u306e\u8981\u7d20\u304c\u524a\u9664\u3055\u308c\u300cdelete_at\u300d\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\u3068\u6307\u5b9a\u3057\u305f\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u756a\u53f7\u306e\u8981\u7d20\u304c\u524a\u9664\u3055\u308c\u307e\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>array = [1, 2, 3, 4, 5]\r\narray.pop\r\nputs array.inspect\r\n\r\narray.delete_at(1)\r\nputs array.inspect<\/pre>\n<\/div>\n<p>\u305d\u308c\u305e\u308c\u306e\u5b9f\u884c\u7d50\u679c\u306f\u3001\u4ee5\u4e0b\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>[1, 2, 3, 4]\r\n[1, 3, 4]<\/pre>\n<\/div>\n<p>\u4ee5\u4e0a\u304cRuby\u306b\u304a\u3051\u308b\u914d\u5217\u306e\u57fa\u672c\u64cd\u4f5c\u3067\u3059\u3002Ruby\u306e\u57fa\u672c\u4e2d\u306e\u57fa\u672c\u306a\u306e\u3067\u3001\u6b63\u78ba\u306b\u628a\u63e1\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<h2><span id=\"Ruby-4\">Ruby\u914d\u5217\u306e\u4fbf\u5229\u306a\u30e1\u30bd\u30c3\u30c9<\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-5165\" src=\"https:\/\/meister-kentei.jp\/magazine\/wp-content\/uploads\/2023\/03\/25525722_s.jpg\" alt=\"\" width=\"640\" height=\"427\" \/><\/p>\n<p>Ruby\u306e\u914d\u5217\u306b\u306f\u3001\u69d8\u3005\u306a\u30e1\u30bd\u30c3\u30c9\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u4ee3\u8868\u7684\u306a\u30e1\u30bd\u30c3\u30c9\u306b\u3064\u3044\u3066\u3001\u4f7f\u3044\u65b9\u3092\u7c21\u5358\u306b\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<h3><span id=\"each\">each\u30e1\u30bd\u30c3\u30c9<\/span><\/h3>\n<p><span class=\"marker\">\u300ceach\u300d\u30e1\u30bd\u30c3\u30c9<\/span>\u306f\u3001\u914d\u5217\u5185\u306e\u8981\u7d20\u30921\u3064\u305a\u3064\u53d6\u308a\u51fa\u3057\u3066\u30d6\u30ed\u30c3\u30af\u306b\u6e21\u3057\u3001\u30d6\u30ed\u30c3\u30af\u5185\u3067\u8a18\u8ff0\u3055\u308c\u305f\u51e6\u7406\u3092\u5b9f\u884c\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>array = [1, 2, 3, 4, 5]\r\narray.each do |num|\r\nputs num\r\nend<\/pre>\n<\/div>\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001\u914d\u5217\u300carray\u300d\u306e\u5404\u8981\u7d20\u3092\u53d6\u308a\u51fa\u3057\u3001\u30d6\u30ed\u30c3\u30af\u8981\u7d20\u300cnum\u300d\u306b\u6e21\u3057\u3066\u3044\u307e\u3059\u3002\u300cputs num\u300d\u3067\u3001num\u5185\u306e\u8981\u7d20\u30921\u3064\u305a\u3064\u51fa\u529b\u3057\u3066\u3044\u307e\u3059\u3002\u5b9f\u884c\u7d50\u679c\u306f\u4ee5\u4e0b\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>1\r\n2\r\n3\r\n4\r\n5<\/pre>\n<\/div>\n<h3><span id=\"uniq\">uniq\u30e1\u30bd\u30c3\u30c9<\/span><\/h3>\n<p><span class=\"marker\">\u300cuniq\u300d\u30e1\u30bd\u30c3\u30c9<\/span>\u306f\u3001\u914d\u5217\u306e\u91cd\u8907\u3057\u305f\u8981\u7d20\u3092\u524a\u9664\u3057\u305f\u65b0\u3057\u3044\u914d\u5217\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>array = [1, 2, 3, 2, 1, 4, 5]\r\nnew_array = array.uniq\r\nputs new_array.inspect<\/pre>\n<\/div>\n<p>\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001\u914d\u5217\u300carray\u300d\u304b\u3089\u91cd\u8907\u3059\u308b\u8981\u7d20\u3092\u524a\u9664\u3057\u3001\u65b0\u3057\u3044\u914d\u5217\u300cnew_array\u300d\u3092\u751f\u6210\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u5b9f\u884c\u7d50\u679c\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>[1, 2, 3, 4, 5]<\/pre>\n<\/div>\n<h3><span id=\"select\">select\u30e1\u30bd\u30c3\u30c9<\/span><\/h3>\n<p><span class=\"marker\">\u300cselect\u300d\u30e1\u30bd\u30c3\u30c9<\/span>\u306f\u3001\u30d6\u30ed\u30c3\u30af\u5185\u306e\u6761\u4ef6\u306b\u5408\u3046\u8981\u7d20\u3060\u3051\u3092\u96c6\u3081\u305f\u65b0\u3057\u3044\u914d\u5217\u3092\u8fd4\u3057\u307e\u3059\u3002\u5b9f\u969b\u306b\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>array = [1, 2, 3, 4, 5]\r\nnew_array = array.select do |num|\r\nnum % 2 == 0\r\nend\r\nputs new_array.inspect<\/pre>\n<\/div>\n<p>\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001\u30d6\u30ed\u30c3\u30af\u306e\u4e2d\u3067\u300cnum % 2 == 0\u300d\u3068\u3044\u3046\u6761\u4ef6\u3092\u6307\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u6761\u4ef6\u306f\u3001\u300c2\u3067\u5272\u3063\u305f\u4f59\u308a\u304c0\u3067\u3042\u308b\u300d\u3053\u3068\u3001\u3064\u307e\u308a\u5076\u6570\u3067\u3042\u308b\u3053\u3068\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u914d\u5217\u300carray\u300d\u304b\u3089\u5076\u6570\u3060\u3051\u3092\u53d6\u308a\u51fa\u3057\u3066\u65b0\u3057\u3044\u914d\u5217\u300cnew_array\u300d\u3092\u51fa\u529b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>[2, 4]<\/pre>\n<\/div>\n<h3><span id=\"lengthsize\">length\u30e1\u30bd\u30c3\u30c9\u30fbsize\u30e1\u30bd\u30c3\u30c9<\/span><\/h3>\n<p><span class=\"marker\">\u300clength\u30e1\u30bd\u30c3\u30c9\u300d\u3068\u300csize\u30e1\u30bd\u30c3\u30c9\u300d<\/span>\u306f\u540c\u3058\u52d5\u4f5c\u3092\u3057\u307e\u3059\u3002\u5171\u306b\u3001\u914d\u5217\u306e\u8981\u7d20\u306e\u6570\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>array = [1, 2, 3]\r\nputs array.length\r\nputs array.size<\/pre>\n<\/div>\n<p>\u3044\u305a\u308c\u3082\u3001\u5b9f\u884c\u7d50\u679c\u306f\u300c3\u300d\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3><span id=\"count\">count\u30e1\u30bd\u30c3\u30c9<\/span><\/h3>\n<p><span class=\"marker\">\u300ccount\u300d\u30e1\u30bd\u30c3\u30c9<\/span>\u306f\u3001\u5f15\u6570\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001\u914d\u5217\u306e\u4e2d\u3067\u5f15\u6570\u3068\u7b49\u3057\u3044\u8981\u7d20\u306e\u6570\u3092\u8fd4\u3057\u307e\u3059\u3002\u5f15\u6570\u3092\u6307\u5b9a\u3057\u306a\u3044\u5834\u5408\u306f\u3001\u300clength\u300d\u3084\u300csize\u300d\u3068\u540c\u3058\u304f\u3001\u914d\u5217\u306e\u8981\u7d20\u306e\u6570\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>array = [1, 2, 2, 3]\r\nputs array.count\r\nputs array.count(2)\r\nputs array.count(4)<\/pre>\n<\/div>\n<p>\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u306e\u5834\u5408\u3001\u5b9f\u884c\u7d50\u679c\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>4\r\n2\r\n0<\/pre>\n<\/div>\n<h3><span id=\"map\">map\u30e1\u30bd\u30c3\u30c9<\/span><\/h3>\n<p><span class=\"marker\">\u300cmap\u300d\u30e1\u30bd\u30c3\u30c9<\/span>\u306f\u3001\u914d\u5217\u306e\u5404\u8981\u7d20\u306b\u5bfe\u3057\u3066\u30d6\u30ed\u30c3\u30af\u3092\u5b9f\u884c\u3057\u3001\u30d6\u30ed\u30c3\u30af\u306e\u623b\u308a\u5024\u3092\u96c6\u3081\u305f\u65b0\u3057\u3044\u914d\u5217\u3092\u8fd4\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>array = [1, 2, 3]\r\nnew_array = array.map { |num| num * 2 }\r\nputs new_array<\/pre>\n<\/div>\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001\u914d\u5217\u300carray\u300d\u306e\u5404\u8981\u7d20\u306e\u5024\u30922\u500d\u306b\u3059\u308b\u51e6\u7406\u3092\u30d6\u30ed\u30c3\u30af\u3067\u5b9f\u884c\u3057\u3001\u305d\u306e\u7d50\u679c\u3092\u65b0\u3057\u3044\u914d\u5217\u300cnew_array\u300d\u306b\u683c\u7d0d\u3057\u3066\u3044\u307e\u3059\u3002\u5b9f\u884c\u7d50\u679c\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre> [2, 4, 6]<\/pre>\n<\/div>\n<h3><span id=\"empty\">empty?\u30e1\u30bd\u30c3\u30c9<\/span><\/h3>\n<p><span class=\"marker\">\u300cempty?\u300d\u30e1\u30bd\u30c3\u30c9<\/span>\u306f\u3001\u914d\u5217\u304c\u7a7a\u304b\u3069\u3046\u304b\u3092\u5224\u5b9a\u3057\u307e\u3059\u3002\u7a7a\u306e\u5834\u5408\u306f\u300ctrue\u300d\u3092\u3001\u305d\u3046\u3067\u306a\u3044\u5834\u5408\u306f\u300cfalse\u300d\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>array = []\r\nputs array.empty?\r\n\r\narray = [1, 2, 3]\r\nputs array.empty?<\/pre>\n<\/div>\n<p>\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u306e\u5834\u5408\u30011\u3064\u76ee\u306eputs\u30e1\u30bd\u30c3\u30c9\u306e\u7d50\u679c\u3068\u3057\u3066\u306f\u300ctrue\u300d\u304c\u30012\u3064\u76ee\u306eputs\u30e1\u30bd\u30c3\u30c9\u306e\u7d50\u679c\u3068\u3057\u3066\u306f\u300cfalse\u300d\u304c\u51fa\u529b\u3055\u308c\u307e\u3059\u3002<\/p>\n<h3><span id=\"any\">any?\u30e1\u30bd\u30c3\u30c9<\/span><\/h3>\n<p><span class=\"marker\">\u300cany?\u300d\u30e1\u30bd\u30c3\u30c9<\/span>\u306f\u3001\u30d6\u30ed\u30c3\u30af\u3092\u914d\u5217\u306e\u5404\u8981\u7d20\u306b\u9069\u7528\u3057\u30011\u3064\u4ee5\u4e0a\u306e\u8981\u7d20\u304c\u6761\u4ef6\u3092\u6e80\u305f\u3059\u5834\u5408\u306b\u306f\u300ctrue\u300d\u3092\u3001\u305d\u3046\u3067\u306a\u3044\u5834\u5408\u306b\u306f\u300cfalse\u300d\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>array = [1, 2, 3]\r\nputs array.any? { |num| num &gt; 2 }<\/pre>\n<\/div>\n<p>\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001\u30d6\u30ed\u30c3\u30af\u30672\u3088\u308a\u3082\u5927\u304d\u3044\u6570\u5b57\u306e\u6709\u7121\u3092\u805e\u3044\u3066\u3044\u307e\u3059\u3002\u914d\u5217\u300carray\u300d\u306b\u306f\u300c3\u300d\u304c\u3042\u308b\u305f\u3081\u3001\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u306e\u5b9f\u884c\u7d50\u679c\u306f\u300ctrue\u300d\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>array = [1, 2, 3]\r\nputs array.any? { |num| num &gt; 3 }<\/pre>\n<\/div>\n<p>\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001\u30d6\u30ed\u30c3\u30af\u30673\u3088\u308a\u3082\u5927\u304d\u3044\u6570\u5b57\u306e\u6709\u7121\u3092\u805e\u3044\u3066\u3044\u307e\u3059\u3002\u914d\u5217\u300carray\u300d\u306b\u306f3\u3088\u308a\u3082\u5927\u304d\u3044\u6570\u5b57\u306f\u306a\u3044\u305f\u3081\u3001\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u306e\u5b9f\u884c\u7d50\u679c\u306f\u300cfalse\u300d\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3><span id=\"all\">all?\u30e1\u30bd\u30c3\u30c9<\/span><\/h3>\n<p><span class=\"marker\">\u300call?\u300d\u30e1\u30bd\u30c3\u30c9<\/span>\u306f\u3001\u30d6\u30ed\u30c3\u30af\u3092\u914d\u5217\u306e\u5404\u8981\u7d20\u306b\u9069\u7528\u3057\u3001\u3059\u3079\u3066\u306e\u8981\u7d20\u304c\u6761\u4ef6\u3092\u6e80\u305f\u3059\u5834\u5408\u306b\u306f\u300ctrue\u300d\u3092\u3001\u305d\u3046\u3067\u306a\u3044\u5834\u5408\u306b\u306f\u300cfalse\u300d\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>array = [1, 2, 3]\r\nputs array.all? { |num| num &gt; 0 }<\/pre>\n<\/div>\n<p>\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001\u30d6\u30ed\u30c3\u30af\u30670\u3088\u308a\u3082\u5927\u304d\u3044\u6570\u5b57\u306e\u6709\u7121\u3092\u805e\u3044\u3066\u3044\u307e\u3059\u3002\u914d\u5217\u300carray\u300d\u306e\u8981\u7d20\u306f\u5168\u30660\u3088\u308a\u3082\u5927\u304d\u3044\u6570\u5b57\u306a\u306e\u3067\u3001\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u306e\u5b9f\u884c\u7d50\u679c\u306f\u300ctrue\u300d\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>array = [1, 2, 3]\r\nputs array.all? { |num| num &gt; 1 }<\/pre>\n<\/div>\n<p>\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001\u30d6\u30ed\u30c3\u30af\u30671\u3088\u308a\u3082\u5927\u304d\u3044\u6570\u5b57\u306e\u6709\u7121\u3092\u805e\u3044\u3066\u3044\u307e\u3059\u3002\u914d\u5217\u300carray\u300d\u306e\u8981\u7d20\u306b\u306f1\u304c\u542b\u307e\u308c\u308b\u305f\u3081\u3001\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u306e\u5b9f\u884c\u7d50\u679c\u306f\u300cfalse\u300d\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3><span id=\"include\">include?\u30e1\u30bd\u30c3\u30c9<\/span><\/h3>\n<p><span class=\"marker\">\u300cinclude?\u300d\u30e1\u30bd\u30c3\u30c9<\/span>\u306f\u3001\u5f15\u6570\u3067\u6307\u5b9a\u3057\u305f\u8981\u7d20\u304c\u914d\u5217\u306b\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u5224\u5b9a\u3057\u307e\u3059\u3002\u542b\u307e\u308c\u3066\u3044\u308b\u5834\u5408\u306f\u300ctrue\u300d\u3092\u3001\u305d\u3046\u3067\u306a\u3044\u5834\u5408\u306f\u300cfalse\u300d\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>array = [1, 2, 3]\r\nputs array.include?(2)<\/pre>\n<\/div>\n<p>\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001\u5f15\u6570\u3067\u300c2\u300d\u304c\u6307\u5b9a\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u914d\u5217\u300carray\u300d\u306b\u306f2\u304c\u542b\u307e\u308c\u308b\u305f\u3081\u3001\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u306e\u5b9f\u884c\u7d50\u679c\u306f\u300ctrue\u300d\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h2><span id=\"Ruby-5\">Ruby\u914d\u5217\u306e\u6f14\u7b97<\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-5166\" src=\"https:\/\/meister-kentei.jp\/magazine\/wp-content\/uploads\/2023\/03\/25365900_s.jpg\" alt=\"\" width=\"640\" height=\"427\" \/><\/p>\n<p>Ruby\u3067\u306f\u3001\u914d\u5217\u540c\u58eb\u306e\u6f14\u7b97\u306b\u3088\u3063\u3066\u65b0\u3057\u3044\u914d\u5217\u3092\u4f5c\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001Ruby\u306e\u914d\u5217\u306e\u6f14\u7b97\u306b\u3064\u3044\u3066\u3001\u5b9f\u969b\u306e\u30b3\u30fc\u30c9\u4f8b\u3092\u4f7f\u3063\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<h3><span id=\"i-7\">\u914d\u5217\u306e\u7a4d\u96c6\u5408<\/span><\/h3>\n<p><span class=\"marker\">\u3067\u306f\u30012\u3064\u306e\u914d\u5217\u306e\u5171\u901a\u306e\u8981\u7d20\u3092\u53d6\u308a\u51fa\u3057\u3066\u65b0\u3057\u3044\u914d\u5217\u3092\u4f5c\u308a\u307e\u3059\u3002\u7a4d\u96c6\u5408\u306f\u6f14\u7b97\u5b50\u3068\u3057\u3066<span class=\"marker\">\u300c&amp;\u300d<\/span>\u3092\u4f7f\u3044\u307e\u3059\u3002<\/span><\/p>\n<div class=\"single__box-secondary\">\n<pre>a = [1, 2, 3]\r\nb = [2, 3, 4]\r\nc = a &amp; b\r\nputs c<\/pre>\n<\/div>\n<p>\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001\u914d\u5217\u300ca\u300d\u3068\u914d\u5217\u300cb\u300d\u306e\u7a4d\u96c6\u5408\u3068\u3057\u3066\u914d\u5217\u300cc\u300d\u3092\u65b0\u3057\u304f\u751f\u6210\u3057\u3066\u3044\u307e\u3059\u3002\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u306e\u5b9f\u884c\u7d50\u679c\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>[2, 3]<\/pre>\n<\/div>\n<h3><span id=\"i-8\">\u914d\u5217\u306e\u548c\u96c6\u5408<\/span><\/h3>\n<p><span class=\"marker\">\u548c\u96c6\u5408<\/span>\u3067\u306f\u30012\u3064\u306e\u914d\u5217\u306e\u8981\u7d20\u306e\u3046\u3061\u3001\u91cd\u8907\u3059\u308b\u8981\u7d20\u3092\u53d6\u308a\u9664\u3044\u3066\u65b0\u3057\u3044\u914d\u5217\u3092\u4f5c\u308a\u307e\u3059\u3002\u548c\u96c6\u5408\u3067\u306f\u6f14\u7b97\u5b50\u3068\u3057\u3066<span class=\"marker\">\u300c|\u300d<\/span>\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>a = [1, 2, 3]\r\nb = [2, 3, 4]\r\nc = a | b\r\nputs c<\/pre>\n<\/div>\n<p>\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u306e\u5b9f\u884c\u7d50\u679c\u306f\u3001\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>[1, 2, 3, 4]<\/pre>\n<\/div>\n<h3><span id=\"i-9\">\u914d\u5217\u306e\u5dee\u96c6\u5408<\/span><\/h3>\n<p><span class=\"marker\">\u5dee\u96c6\u5408<\/span>\u3067\u306f\u3001\u5de6\u306e\u914d\u5217\u304b\u3089\u53f3\u306e\u914d\u5217\u306e\u8981\u7d20\u3092\u53d6\u308a\u9664\u3044\u305f\u65b0\u3057\u3044\u914d\u5217\u3092\u4f5c\u308a\u307e\u3059\u3002\u5dee\u96c6\u5408\u3067\u306f\u6f14\u7b97\u5b50\u3068\u3057\u3066<span class=\"marker\">\u300c-\u300d<\/span>\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>a = [1, 2, 3]\r\nb = [2, 3, 4]\r\nc = a - b\r\nputs c<\/pre>\n<\/div>\n<p>\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u306e\u5b9f\u884c\u7d50\u679c\u306f\u3001\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>[1]<\/pre>\n<\/div>\n<h3><span id=\"i-10\">\u914d\u5217\u306e\u8981\u7d20\u7e70\u308a\u8fd4\u3057<\/span><\/h3>\n<p><span class=\"marker\">\u8981\u7d20\u7e70\u308a\u8fd4\u3057<\/span>\u3067\u306f\u3001\u914d\u5217\u306e\u8981\u7d20\u3092\u7e70\u308a\u8fd4\u3057\u3066\u65b0\u3057\u3044\u914d\u5217\u3092\u8fd4\u3057\u307e\u3059\u3002\u6f14\u7b97\u5b50\u306f<span class=\"marker\">\u300c*\u300d<\/span>\u3092\u4f7f\u3044\u3001\u7e70\u308a\u8fd4\u3059\u56de\u6570\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>a = [1, 2, 3]\r\nb = a * 3\r\nputs b<\/pre>\n<\/div>\n<p>\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u306e\u5b9f\u884c\u7d50\u679c\u306f\u3001\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>[1, 2, 3, 1, 2, 3, 1, 2, 3]<\/pre>\n<\/div>\n<h3><span id=\"i-11\">\u914d\u5217\u306e\u9023\u7d50<\/span><\/h3>\n<p><span class=\"marker\">\u914d\u5217\u3092\u9023\u7d50<\/span>\u3057\u3001\u65b0\u3057\u3044\u914d\u5217\u3092\u4f5c\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u9023\u7d50\u3059\u308b\u969b\u306f\u6f14\u7b97\u5b50\u3068\u3057\u3066<span class=\"marker\">\u300c+\u300d<\/span>\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>a = [1, 2, 3]\r\nb = [4, 5, 6]\r\nc = a + b\r\nputs c<\/pre>\n<\/div>\n<p>\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u306e\u5b9f\u884c\u7d50\u679c\u306f\u3001\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>[1, 2, 3, 4, 5, 6]<\/pre>\n<\/div>\n<h2><span id=\"i-12\">\u307e\u3068\u3081<\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-4697\" src=\"https:\/\/meister-kentei.jp\/magazine\/wp-content\/uploads\/2023\/02\/4977723_s.jpg\" alt=\"\" width=\"640\" height=\"427\" \/><\/p>\n<p>\u672c\u8a18\u4e8b\u3067\u306f\u3001Ruby\u306b\u304a\u3051\u308b\u914d\u5217\u306e\u6271\u3044\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u3066\u304d\u307e\u3057\u305f\u3002\u914d\u5217\u306f\u8907\u6570\u306e\u30c7\u30fc\u30bf\u306e\u96c6\u5408\u3067\u3001\u9806\u756a\u306b\u5272\u308a\u632f\u3089\u308c\u305f\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u756a\u53f7\u3092\u4f7f\u3063\u3066\u30c7\u30fc\u30bf\u3092\u7ba1\u7406\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>Ruby\u306e\u914d\u5217\u306b\u306f\u591a\u304f\u306e\u4fbf\u5229\u306a\u30e1\u30bd\u30c3\u30c9\u304c\u3042\u308b\u305f\u3081\u3001\u5404\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3084\u9055\u3044\u3092\u628a\u63e1\u3057\u3066\u304a\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u914d\u5217\u3092\u4f7f\u3044\u3053\u306a\u3057\u3066\u3001Ruby\u30b9\u30ad\u30eb\u3092\u3055\u3089\u306b\u30ec\u30d9\u30eb\u30a2\u30c3\u30d7\u3055\u305b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\uff01<\/p>\n<p>Ruby\u5b66\u7fd2\u306b\u3064\u3044\u3066\u306f\u3001\u4ee5\u4e0b\u306e\u8a18\u4e8b\u3082\u3042\u308f\u305b\u3066\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n<p><a href=\"https:\/\/meister-kentei.jp\/magazine\/programming\/4684\/\" target=\"_blank\" rel=\"noopener\">\u3010Ruby\u5165\u9580\u3011Ruby\u3067\u3067\u304d\u308b\u3053\u3068\u304b\u3089\u5165\u9580\u65b9\u6cd5\u307e\u3067\u89e3\u8aac\u3057\u307e\u3059<\/a><\/p>\n<p><a href=\"https:\/\/meister-kentei.jp\/magazine\/programming\/2473\/\" target=\"_blank\" rel=\"noopener\">Ruby\u72ec\u5b66\u306e\u79d8\u8a23\u306f\uff1f\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u521d\u5fc3\u8005\u5411\u3051\u72ec\u5b66\u65b9\u6cd5\u3092\u3054\u7d39\u4ecb<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u76ee\u6b211 Ruby\u306b\u304a\u3051\u308b\u914d\u5217\u3068\u306f1.1 \u914d\u5217\u3068\u306f1.2 Ruby\u306e\u914d\u5217\u306e\u4f7f\u3044\u65b92 Ruby\u306b\u304a\u3051\u308b\u914d\u5217\u306e\u57fa\u672c\u64cd\u4f5c2.1 \u914d\u5217\u306e\u751f\u62102.2 \u914d\u5217\u306e\u53d6\u5f972.3 \u914d\u5217\u306e\u8ffd\u52a02.4 \u914d\u5217\u306e\u66f4\u65b02.5 \u914d\u5217\u306e\u524a\u96643 Ruby\u914d\u5217\u306e 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