{"id":112,"date":"2019-07-27T21:52:11","date_gmt":"2019-07-27T21:52:11","guid":{"rendered":"https:\/\/oidema-jp.com\/media\/2019-07-27-215211\/"},"modified":"2019-07-27T21:52:11","modified_gmt":"2019-07-27T21:52:11","slug":"2019-07-27-215211","status":"publish","type":"post","link":"https:\/\/oidema-jp.com\/media\/2019-07-27-215211\/","title":{"rendered":"\u3010Ruby Silver \u8a66\u9a13\u3011equal?, str.index, array.product(array),"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_81 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/oidema-jp.com\/media\/2019-07-27-215211\/#equal\" >equal?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/oidema-jp.com\/media\/2019-07-27-215211\/#strreverse\" >str.reverse<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/oidema-jp.com\/media\/2019-07-27-215211\/#strindex%E2%80%9C%E6%A4%9C%E7%B4%A2%E6%96%87%E5%AD%97%E5%88%97%E2%80%9D_n%E4%BD%95%E5%80%8B%E7%9B%AE\" >str.index(\u201c\u691c\u7d22\u6587\u5b57\u5217\u201d, n(\u4f55\u500b\u76ee))<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/oidema-jp.com\/media\/2019-07-27-215211\/#arrayproductArray\" >array.product(Array)<\/a><\/li><\/ul><\/nav><\/div>\n<h2 id=\"i-0\"><span class=\"ez-toc-section\" id=\"equal\"><\/span>equal?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><a href=\"https:\/\/ref.xaio.jp\/ruby\/classes\/object\/equal\">\u3010Ruby\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9\u3011\uff1aequal? (Object)<\/a><\/p>\n<ul>\n<li>\n<p>equal?\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u30ec\u30b7\u30fc\u30d0\u3068\u5f15\u6570\u304c\u540c\u3058\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306a\u3089true\u3001\u5225\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306a\u3089false\u3092\u8fd4\u3059<\/p>\n<\/li>\n<li>\n<p>\u6587\u5b57\u5217\u3092<code>==<\/code>\u3067\u6bd4\u8f03\u3057\u305f\u5834\u5408\u306f\u6587\u5b57\u5217\u306e\u5185\u5bb9\u304c\u540c\u3058\u3067\u3042\u308c\u3070true\u3092\u8fd4\u3059<\/p>\n<\/li>\n<\/ul>\n<pre class=\"code lang-ruby\" data-lang=\"ruby\" data-unlink=\"\">a1 = <span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">abc<\/span><span class=\"synSpecial\">\"<\/span>\na2 = <span class=\"synSpecial\">'<\/span><span class=\"synConstant\">abc<\/span><span class=\"synSpecial\">'<\/span>\nputs a1.equal? a2\nputs a1 == a2\n=&gt; <span class=\"synConstant\">false<\/span>\n=&gt; <span class=\"synConstant\">true<\/span>\n<\/pre>\n<p>equal\uff1f\u3067true\u304c\u8fd4\u3089\u306a\u3044\u306e\u3067object_id\u3092\u78ba\u8a8d\u3059\u308b<\/p>\n<pre class=\"code lang-ruby\" data-lang=\"ruby\" data-unlink=\"\">a1 = <span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">abc<\/span><span class=\"synSpecial\">\"<\/span>.object_id\na2 = <span class=\"synSpecial\">'<\/span><span class=\"synConstant\">abc<\/span><span class=\"synSpecial\">'<\/span>.object_id\nputs a1.equal? a2\n=&gt; <span class=\"synConstant\">false<\/span>\n=&gt; <span class=\"synConstant\">70281024543260<\/span>\n=&gt; <span class=\"synConstant\">70281024543220<\/span>\n<\/pre>\n<p>\u3084\u3063\u3071\u308a\u9055\u3046\u3002\uff08\u305d\u308a\u3083\u305d\u3046\u3060\u3002\uff09<\/p>\n<p>\u3068\u3044\u3046\u3053\u3068\u3067\u540c\u3058\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u5909\u6570\u306b\u6e21\u3057\u3066\u3042\u3052\u3066true\u3092\u8fd4\u3059\u3088\u3046\u306b\u3059\u308b<\/p>\n<pre class=\"code lang-ruby\" data-lang=\"ruby\" data-unlink=\"\">a1 = <span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">abc<\/span><span class=\"synSpecial\">\"<\/span>\na2 = a1\nputs a1.equal? a2\nputs a1.object_id\nputs a2.object_id\n=&gt; <span class=\"synConstant\">true<\/span>\n=&gt; <span class=\"synConstant\">70287366322720<\/span>\n=&gt; <span class=\"synConstant\">70287366322720<\/span>\n<\/pre>\n<h2 id=\"i-1\"><span class=\"ez-toc-section\" id=\"strreverse\"><\/span>str.reverse<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>reverse\u306f\u6587\u5b57\u308c\u308b\u3092\u9006\u3055\u306b\u3059\u308b\u3002<\/p>\n<pre class=\"code\" data-lang=\"\" data-unlink=\"\">a = \"Ruby on Rails\"\nstring = a.reverse\nputs string\n=&gt; Ruby on Rails\n=&gt; sliaR no ybuR<\/pre>\n<p>\u3068\u3063\u3066\u3082\u30b7\u30f3\u30d7\u30eb\u306a\u306e\u3067\u89e3\u8aac\u306f\u5272\u611b\u3059\u308b\uff08\u6c17\u5206\uff09<\/p>\n<h2 id=\"i-2\"><span class=\"ez-toc-section\" id=\"strindex%E2%80%9C%E6%A4%9C%E7%B4%A2%E6%96%87%E5%AD%97%E5%88%97%E2%80%9D_n%E4%BD%95%E5%80%8B%E7%9B%AE\"><\/span>str.index(\u201c\u691c\u7d22\u6587\u5b57\u5217\u201d, n(\u4f55\u500b\u76ee))<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><a href=\"https:\/\/ref.xaio.jp\/ruby\/classes\/string\/index\">\u3010Ruby\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9\u3011\uff1aindex (String)<\/a><\/p>\n<ul>\n<li>\n<p>index\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u6587\u5b57\u5217\u306e\u4e2d\u306b\u90e8\u5206\u6587\u5b57\u5217\u304c\u542b\u307e\u308c\u3066\u3044\u308c\u3070\u3001\u305d\u306e\u958b\u59cb\u4f4d\u7f6e\u3092\u6574\u6570\u3067\u8fd4\u3059\uff080\u304c1\u756a\u76ee\u30011\u304c2\u756a\u76ee\u3001\u2026\uff09\u3002<\/p>\n<\/li>\n<li>\n<p>\u542b\u307e\u308c\u3066\u3044\u306a\u3051\u308c\u3070<a class=\"keyword\" href=\"http:\/\/d.hatena.ne.jp\/keyword\/nil\">nil<\/a>\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n<\/li>\n<\/ul>\n<pre class=\"code lang-ruby\" data-lang=\"ruby\" data-unlink=\"\">a = <span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">Ruby on Rails<\/span><span class=\"synSpecial\">\"<\/span>\np a.index(<span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">R<\/span><span class=\"synSpecial\">\"<\/span>, <span class=\"synConstant\">0<\/span>)\n=&gt; <span class=\"synConstant\">0<\/span>\n<\/pre>\n<pre class=\"code lang-ruby\" data-lang=\"ruby\" data-unlink=\"\">a = <span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">Ruby on Rails<\/span><span class=\"synSpecial\">\"<\/span>\np a.index(<span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">R<\/span><span class=\"synSpecial\">\"<\/span>, <span class=\"synConstant\">1<\/span>)\n=&gt; <span class=\"synConstant\">8<\/span>\n<\/pre>\n<pre class=\"code lang-ruby\" data-lang=\"ruby\" data-unlink=\"\">a = <span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">Ruby on Rails<\/span><span class=\"synSpecial\">\"<\/span>\np a.index(<span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">R<\/span><span class=\"synSpecial\">\"<\/span>, <span class=\"synConstant\">9<\/span>)\n=&gt; <span class=\"synConstant\">nil<\/span>\n<\/pre>\n<h2 id=\"i-3\"><span class=\"ez-toc-section\" id=\"arrayproductArray\"><\/span>array.product(Array)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><a href=\"https:\/\/ref.xaio.jp\/ruby\/classes\/array\/product\">\u3010Ruby\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9\u3011\uff1aproduct (Array)<\/a><\/p>\n<ul>\n<li>product\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u914d\u5217\u306e\u8981\u7d20\u3068\u5f15\u6570\u306e\u914d\u5217\u306e\u8981\u7d20\u306e\u7d44\u5408\u305b\u3092\u4f5c\u308a\u3001\u914d\u5217\u306e\u914d\u5217\u3092\u4f5c\u6210\u3057\u3066\u8fd4\u3059<\/li>\n<\/ul>\n<pre class=\"code lang-ruby\" data-lang=\"ruby\" data-unlink=\"\">arr = [<span class=\"synConstant\">1<\/span>,<span class=\"synConstant\">2<\/span>].product([<span class=\"synConstant\">3<\/span>,<span class=\"synConstant\">4<\/span>])\np arr\n=&gt; [[<span class=\"synConstant\">1<\/span>, <span class=\"synConstant\">3<\/span>], [<span class=\"synConstant\">1<\/span>, <span class=\"synConstant\">4<\/span>], [<span class=\"synConstant\">2<\/span>, <span class=\"synConstant\">3<\/span>], [<span class=\"synConstant\">2<\/span>, <span class=\"synConstant\">4<\/span>]]\n<\/pre>\n<p>\u3068\u3063\u3066\u3082\u30b7\u30f3\u30d7\u30eb\u3067\u4f7f\u3044\u3084\u3059\u305d\u3046\u306a\u6c17\u304c\u3059\u308b\u3002<\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u306f\u3053\u3053\u307e\u3067<\/p>\n<p>\u5f53\u30d6\u30ed\u30b0\u3067\u306f<a class=\"keyword\" href=\"http:\/\/d.hatena.ne.jp\/keyword\/Ruby\">Ruby<\/a> Silver\u306e\u53d7\u9a13\u306b\u5411\u3051\u3066\u30a4\u30f3\u30d7\u30c3\u30c8\u3057\u305f\u5185\u5bb9\u3092\u8a18\u4e8b\u306b\u30e1\u30e2\u3057\u3066\u3044\u308b\u306e\u3067<a class=\"keyword\" href=\"http:\/\/d.hatena.ne.jp\/keyword\/Ruby\">Ruby<\/a> Silver\u3092\u53d7\u9a13\u3055\u308c\u308b\u65b9\u306f<a href=\"https:\/\/oidema-jp.com\/media\/archive\/category\/Ruby%20Silver\">\u3053\u3061\u3089<\/a>\u3082\u306e\u305e\u3044\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u306d\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>equal? \u3010Ruby\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9\u3011\uff1aequal? (Object) equal?\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u30ec\u30b7\u30fc\u30d0\u3068\u5f15\u6570\u304c\u540c\u3058\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306a\u3089true\u3001\u5225\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306a\u3089false\u3092\u8fd4\u3059 \u6587\u5b57\u5217\u3092==\u3067\u6bd4\u8f03\u3057\u305f\u5834\u5408\u306f\u6587\u5b57\u5217\u306e\u5185\u5bb9 &#8230; <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"om_disable_all_campaigns":false,"footnotes":""},"categories":[11,12],"tags":[],"class_list":{"0":"post-112","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-ruby","7":"category-ruby-silver","8":"entry","9":"nothumb"},"acf":[],"aioseo_notices":[],"mb":[],"mfb_rest_fields":["title","aioseo_notices"],"_links":{"self":[{"href":"https:\/\/oidema-jp.com\/media\/wp-json\/wp\/v2\/posts\/112","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oidema-jp.com\/media\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/oidema-jp.com\/media\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/oidema-jp.com\/media\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/oidema-jp.com\/media\/wp-json\/wp\/v2\/comments?post=112"}],"version-history":[{"count":0,"href":"https:\/\/oidema-jp.com\/media\/wp-json\/wp\/v2\/posts\/112\/revisions"}],"wp:attachment":[{"href":"https:\/\/oidema-jp.com\/media\/wp-json\/wp\/v2\/media?parent=112"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/oidema-jp.com\/media\/wp-json\/wp\/v2\/categories?post=112"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/oidema-jp.com\/media\/wp-json\/wp\/v2\/tags?post=112"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}