{"id":113,"date":"2019-07-27T20:14:28","date_gmt":"2019-07-27T20:14:28","guid":{"rendered":"https:\/\/oidema-jp.com\/media\/2019-07-27-201428\/"},"modified":"2019-07-27T20:14:28","modified_gmt":"2019-07-27T20:14:28","slug":"2019-07-27-201428","status":"publish","type":"post","link":"https:\/\/oidema-jp.com\/media\/2019-07-27-201428\/","title":{"rendered":"\u3010Ruby Silver \u8a66\u9a13\u3011concat, invert, \u65e5\u4ed8\u578b"},"content":{"rendered":"<h2 id=\"i-0\">str.concat(string)<\/h2>\n<p><a href=\"https:\/\/ref.xaio.jp\/ruby\/classes\/string\/concat\">\u3010Ruby\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9\u3011\uff1aconcat (String)<\/a><\/p>\n<ul>\n<li>concat\u30e1\u30bd\u30c3\u30c9\u306f\u3001<code>&lt;&lt;<\/code>\u306e\u5225\u540d<\/li>\n<li>\u6587\u5b57\u5217\u306e\u672b\u5c3e\u306b\u5225\u306e\u6587\u5b57\u5217\u3092\u52a0\u3048\u3066\u5229\u7528\u3059\u308b\u3002<\/li>\n<li>\u6574\u6570integer\u3067\u6587\u5b57\u306e\u30b3\u30fc\u30c9\u3092\u6307\u5b9a\u3059\u308b\u3068\u3001\u6587\u5b57\u5217\u306e\u672b\u5c3e\u306b1\u6587\u5b57\u8ffd\u52a0\u3059\u308b<\/li>\n<\/ul>\n<p>\u307e\u305a\u306f\u81ea\u5206\u306a\u308a\u306b\u4f7f\u3063\u3066\u307f\u308b\u3002<\/p>\n<pre class=\"code lang-ruby\" data-lang=\"ruby\" data-unlink=\"\">strings = [<span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">a<\/span><span class=\"synSpecial\">\"<\/span>, <span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">b<\/span><span class=\"synSpecial\">\"<\/span>, <span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">c<\/span><span class=\"synSpecial\">\"<\/span>]\nnew_string = <span class=\"synSpecial\">\"\"<\/span>\nstrings.each <span class=\"synStatement\">do<\/span> |<span class=\"synIdentifier\">string<\/span>|\nnew_string.concat(string)\n<span class=\"synStatement\">end<\/span>\nputs new_string\n=&gt; abc\n<\/pre>\n<p><code>&lt;&lt;<\/code>\u306e<a class=\"keyword\" href=\"http:\/\/d.hatena.ne.jp\/keyword\/%A5%A8%A5%A4%A5%EA%A5%A2%A5%B9\">\u30a8\u30a4\u30ea\u30a2\u30b9<\/a>\u3068\u3044\u3046\u3053\u3068\u306a\u306e\u3067<\/p>\n<pre class=\"code lang-ruby\" data-lang=\"ruby\" data-unlink=\"\">strings = [<span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">a<\/span><span class=\"synSpecial\">\"<\/span>, <span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">b<\/span><span class=\"synSpecial\">\"<\/span>, <span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">c<\/span><span class=\"synSpecial\">\"<\/span>]\nnew_string = <span class=\"synSpecial\">\"\"<\/span>\nstrings.each <span class=\"synStatement\">do<\/span> |<span class=\"synIdentifier\">string<\/span>|\nnew_string &lt;&lt; string <span class=\"synComment\">#\u3053\u3053\u3092\u66f8\u304d\u63db\u3048\u305f<\/span>\n<span class=\"synStatement\">end<\/span>\nputs new_string\n=&gt; abc\n<\/pre>\n<p>\u6574\u6570integer\u3067\u6587\u5b57\u306e\u30b3\u30fc\u30c9\u3092\u6307\u5b9a\u3059\u308b\u3068\u3001\u6587\u5b57\u5217\u306e\u672b\u5c3e\u306b1\u6587\u5b57\u8ffd\u52a0\u3059\u308b<br \/>\n\u3048\u3001\u3069\u3046\u3044\u3046\u3053\u3068\uff1f<br \/>\n\u3068\u308a\u3042\u3048\u305astring\u914d\u5217\u306b100\u3092\u8ffd\u52a0\u3057\u3066\u307f\u305f\u3002<\/p>\n<pre class=\"code\" data-lang=\"\" data-unlink=\"\">strings = [\"a\", \"b\", \"c\", 100]\nnew_string = \"\"\nstrings.each do |string|\nnew_string &lt;&lt; string\nend\nputs new_string\n=&gt; abcd<\/pre>\n<p>d\u304c\u8ffd\u52a0\u3055\u308c\u305f\u3002<br \/>\n\u3069\u3046\u3084\u3089integer\u3067\u6587\u5b57\u3092\u8868\u73fe\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u3067\u6c7a\u307e\u3063\u305f\u30eb\u30fc\u30eb\u304c\u3042\u308b\u3088\u3046\u3060\u3002<br \/>\n\u3042\u307e\u308a\u884c\u304d\u904e\u304e\u308b\u3068\u8f9b\u3044\u306e\u3067\u3053\u306e\u7bc4\u56f2\u3092\u8abf\u3079\u308b\u306e\u306f\u3088\u3057\u3066\u304a\u3053\u3046\u3002<\/p>\n<h2 id=\"i-1\">Hash.invert<\/h2>\n<p><a href=\"https:\/\/ref.xaio.jp\/ruby\/classes\/hash\/invert\">\u3010Ruby\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9\u3011\uff1ainvert (Hash)<\/a><\/p>\n<ul>\n<li>invert\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u30ad\u30fc\u3092\u5024\u306b\u3001\u5024\u3092\u30ad\u30fc\u306b\u3057\u305f\u30cf\u30c3\u30b7\u30e5\u3092\u4f5c\u6210\u3059\u308b<\/li>\n<li>\u30ec\u30b7\u30fc\u30d0\u306e\u5404\u30ad\u30fc\u3068\u5024\u3092\u300c\u5024 =&gt; \u30ad\u30fc\u300d\u3068\u3057\u3066\u65b0\u3057\u3044\u30cf\u30c3\u30b7\u30e5\u306b\u96c6\u3081\u3066\u8fd4\u3059<\/li>\n<\/ul>\n<pre class=\"code lang-ruby\" data-lang=\"ruby\" data-unlink=\"\">h = {<span class=\"synConstant\">a<\/span>: <span class=\"synConstant\">100<\/span>, <span class=\"synConstant\">b<\/span>: <span class=\"synConstant\">200<\/span>}\np h.invert\n=&gt; {<span class=\"synConstant\">100<\/span>=&gt;<span class=\"synConstant\">:a<\/span>, <span class=\"synConstant\">200<\/span>=&gt;<span class=\"synConstant\">:b<\/span>}\n<\/pre>\n<p>\u3044\u3064\u4f7f\u3046\u304b\u60f3\u50cf\u3082\u3064\u304b\u306a\u3044\u3051\u3069\u3001\u3001\u3068\u3063\u3066\u3082\u30b7\u30f3\u30d7\u30eb\u3067\u3044\u3044\u306d\u3002<\/p>\n<h2 id=\"i-2\">\u65e5\u4ed8\u578b\u306e\u30c7\u30d5\u30a9\u30eb\u30c8<\/h2>\n<p>Date.today.to_s\u3068\u540c\u3058\u52d5\u4f5c\u3092\u3059\u308b\u30b3\u30fc\u30c9\u3092\u9078\u3073\u306a\u3055\u3044<\/p>\n<blockquote>\n<p>\u3053\u306e\u554f\u984c\u5acc\u3044\u3067\u3059\u3002\u3069\u3046\u3067\u3082\u3044\u3044\u304b\u3089\u3002<\/p>\n<\/blockquote>\n<pre class=\"code lang-ruby\" data-lang=\"ruby\" data-unlink=\"\">\u9078\u629e\u80a2\n<span class=\"synType\">Date<\/span>.today.strftime(<span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">%y\/%m\/%d<\/span><span class=\"synSpecial\">\"<\/span>)\n\u9078\u629e\u80a2\n<span class=\"synType\">Date<\/span>.today.strftime(<span class=\"synSpecial\">'<\/span><span class=\"synConstant\">%y-%m-%d<\/span><span class=\"synSpecial\">'<\/span>)\n\u9078\u629e\u80a2\n<span class=\"synType\">Date<\/span>.today.strftime(<span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">%Y\/%m\/%d<\/span><span class=\"synSpecial\">\"<\/span>)\n\u9078\u629e\u80a2\n<span class=\"synType\">Date<\/span>.today.strftime(<span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">%Y-%m-%d<\/span><span class=\"synSpecial\">\"<\/span>)\u3000\uff03\u7b54\u3048\u306f\u3053\u308c\uff01\uff01\n<\/pre>\n<p>\u3082\u3046\u5168\u90e8\u51fa\u529b\u3057\u3066\u3084\u3063\u305f\u3002<\/p>\n<pre class=\"code lang-ruby\" data-lang=\"ruby\" data-unlink=\"\"><span class=\"synPreProc\">require<\/span> <span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">date<\/span><span class=\"synSpecial\">\"<\/span>\np <span class=\"synType\">Date<\/span>.today.to_s\np <span class=\"synType\">Date<\/span>.today.strftime(<span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">%y\/%m\/%d<\/span><span class=\"synSpecial\">\"<\/span>)\np <span class=\"synType\">Date<\/span>.today.strftime(<span class=\"synSpecial\">'<\/span><span class=\"synConstant\">%y-%m-%d<\/span><span class=\"synSpecial\">'<\/span>)\np <span class=\"synType\">Date<\/span>.today.strftime(<span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">%Y\/%m\/%d<\/span><span class=\"synSpecial\">\"<\/span>)\np <span class=\"synType\">Date<\/span>.today.strftime(<span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">%Y-%m-%d<\/span><span class=\"synSpecial\">\"<\/span>)\n=&gt; <span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">2019-07-27<\/span><span class=\"synSpecial\">\"<\/span>\n=&gt; <span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">19\/07\/27<\/span><span class=\"synSpecial\">\"<\/span>\n=&gt; <span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">19-07-27<\/span><span class=\"synSpecial\">\"<\/span>\n=&gt; <span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">2019\/07\/27<\/span><span class=\"synSpecial\">\"<\/span>\n=&gt; <span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">2019-07-27<\/span><span class=\"synSpecial\">\"<\/span>\n<\/pre>\n<p><code>%y'\u306f19\u3068\u306a\u308b\u306e\u306b\u5bfe\u3057\u3066\u3001<\/code>%Y\u2019\u306f2019\u3068\u51fa\u529b\u3057\u3066\u304f\u308c\u308b\u3002<br \/>\u3053\u306e\u3042\u305f\u308a\u306f\u899a\u3048\u3066\u3044\u3066\u3082\u826f\u3055\u305d\u3046\u3060\u3068\u601d\u3063\u305f\u3002<\/p>\n<p>\u524d\u3082\u5f15\u3063\u304b\u304b\u3063\u305f\u3051\u3069<code>%m<\/code>\u306f\u6708\u3060\u3051\u3069<code>%M<\/code>\u306f\u5206\u3063\u3066\u3044\u3046\u306e\u306f\u899a\u3048\u3066\u306a\u3044\u3068\u308f\u304b\u3089\u306a\u3044\u304b\u3082\u3002\u3002<\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u306f\u3053\u3053\u307e\u3067\u3002<\/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>str.concat(string) \u3010Ruby\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9\u3011\uff1aconcat (String) concat\u30e1\u30bd\u30c3\u30c9\u306f\u3001&lt;&lt;\u306e\u5225\u540d \u6587\u5b57\u5217\u306e\u672b\u5c3e\u306b\u5225\u306e\u6587\u5b57\u5217\u3092\u52a0\u3048\u3066\u5229\u7528\u3059\u308b\u3002 \u6574\u6570integer\u3067\u6587\u5b57\u306e\u30b3\u30fc\u30c9 &#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-113","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\/113","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=113"}],"version-history":[{"count":0,"href":"https:\/\/oidema-jp.com\/media\/wp-json\/wp\/v2\/posts\/113\/revisions"}],"wp:attachment":[{"href":"https:\/\/oidema-jp.com\/media\/wp-json\/wp\/v2\/media?parent=113"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/oidema-jp.com\/media\/wp-json\/wp\/v2\/categories?post=113"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/oidema-jp.com\/media\/wp-json\/wp\/v2\/tags?post=113"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}