{"id":8597,"date":"2019-12-17T23:13:22","date_gmt":"2019-12-17T14:13:22","guid":{"rendered":"http:\/\/www.code-magagine.com\/?p=8597"},"modified":"2023-05-27T22:32:49","modified_gmt":"2023-05-27T13:32:49","slug":"%e3%80%90ruby%e3%80%91%e3%83%87%e3%83%bc%e3%82%bf%e5%9e%8b","status":"publish","type":"post","link":"http:\/\/www.code-magagine.com\/?p=8597","title":{"rendered":"\u3010Ruby\u3011\u30c7\u30fc\u30bf\u578b\u30af\u30e9\u30b9"},"content":{"rendered":"<p>Ruby\u306f\u52d5\u7684\u578b\u4ed8\u3051\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u306a\u306e\u3067\u660e\u793a\u7684\u306b\u5ba3\u8a00\u306f\u3057\u307e\u305b\u3093\u304c\u3001\u5909\u6570\u306b\u5024\u3092\u4ee3\u5165\u3057\u305f\u77ac\u9593\u306b\u4e0b\u8a18\u306e\u3088\u3046\u306a\u30c7\u30fc\u30bf\u578b\u306e\u30af\u30e9\u30b9\u304c\u4f7f\u308f\u308c\u3066\u3044\u308b\u306e\u3067\u899a\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<h2>String\u30af\u30e9\u30b9\uff08\u6587\u5b57\u5217\uff09<\/h2>\n<h3>\u6587\u5b57\u5217\u64cd\u4f5c<\/h3>\n<h4>upcase\u30e1\u30bd\u30c3\u30c9<\/h4>\n<p>\u6587\u5b57\u5217\u3092\u5168\u3066\u5927\u6587\u5b57\u306b\u3057\u307e\u3059\u3002\u305d\u306e\u5834\u3067\u6587\u5b57\u5217\u3092\u751f\u6210\u3059\u308b\u3060\u3051\u3067\u5143\u306e\u5909\u6570\u306e\u5024\u306f\u5909\u308f\u308a\u307e\u305b\u3093\u3002<\/p>\n<h4>upcase!\u30e1\u30bd\u30c3\u30c9<\/h4>\n<p>\u6587\u5b57\u5217\u3092\u5168\u3066\u5927\u6587\u5b57\u306b\u3057\u307e\u3059\u3002\u5143\u306e\u5909\u6570\u306e\u6587\u5b57\u5217\u3092\u5927\u6587\u5b57\u306b\u66f8\u304d\u63db\u3048\u307e\u3059\u3002\uff08\u7834\u58ca\u7684\u7de8\u96c6\uff09<\/p>\n<h4>downcase\u30e1\u30bd\u30c3\u30c9<\/h4>\n<p>\u6587\u5b57\u5217\u3092\u5168\u3066\u5c0f\u6587\u5b57\u306b\u3057\u307e\u3059\u3002\u305d\u306e\u5834\u3067\u6587\u5b57\u5217\u3092\u751f\u6210\u3059\u308b\u3060\u3051\u3067\u5143\u306e\u5909\u6570\u306e\u5024\u306f\u5909\u308f\u308a\u307e\u305b\u3093\u3002<\/p>\n<h4>slice(\u958b\u59cb\u4f4d\u7f6e\u3001\u7d42\u4e86\u4f4d\u7f6e\uff09<\/h4>\n<p>\u6587\u5b57\u5217\u304b\u3089\u5024\u3092\u5207\u308a\u53d6\u308a\u307e\u3059\u3002<\/p>\n<h4>size\u30e1\u30bd\u30c3\u30c9<\/h4>\n<p>\u6587\u5b57\u6570\u3092\u53d6\u5f97\u3067\u304d\u308b\u3002<\/p>\n<h3>\u30c7\u30fc\u30bf\u578b\u5909\u63db<\/h3>\n<h4>to_i\u30e1\u30bd\u30c3\u30c9<\/h4>\n<p>String\u578b\u3092Integer\u578b\u306b\u5909\u63db\u3059\u308b\u3002<\/p>\n<h4>to_f\u30e1\u30bd\u30c3\u30c9<\/h4>\n<p>String\u578b\u3092float\u578b\u306b\u5909\u63db\u3059\u308b\u3002<\/p>\n<h2>Numeric<\/h2>\n<p>\u6570\u5024\u30af\u30e9\u30b9<\/p>\n<h3>Integer<\/h3>\n<p>\u6574\u6570\u30af\u30e9\u30b9<\/p>\n<h4>\u6574\u6570.zero?<\/h4>\n<p>\u6574\u6570\u304c0\u3067\u3042\u308b\u304b\u5224\u5b9a\u3057\u307e\u3059\u30020\u3067\u3042\u308c\u3070true\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n<h4>\u6574\u6570.even?<\/h4>\n<p>\u6574\u6570\u304c\u5076\u6570\u3067\u3042\u308b\u304b\u5224\u5b9a\u3057\u307e\u3059\u3002\u5076\u6570\u3067\u3042\u308c\u3070true\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n<h4>\u6574\u6570.odd?<\/h4>\n<p>\u6574\u6570\u304c\u5947\u6570\u3067\u3042\u308b\u304b\u5224\u5b9a\u3057\u307e\u3059\u3002\u5947\u6570\u3067\u3042\u308c\u3070true\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n<h4>to_s\u30e1\u30bd\u30c3\u30c9<\/h4>\n<p>\u300c\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u300d\u3092\u6587\u5b57\u5217\u3068\u3057\u3066\u8fd4\u3057\u307e\u3059\u3002(Java\u3067\u8a00\u3046\u3068\u3053\u308d\u306e\u300ctoString\u30e1\u30bd\u30c3\u30c9\u300d\u3067\u3059\u306d\u3002\uff09<\/p>\n<p>\u4f8b\u3048\u3070\u3001\u4e0b\u8a18\u306e\u3088\u3046\u306a\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u7528\u610f\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">#\u6587\u5b57\u5217\r\nputs 1.to_s\r\n\r\n#nil\r\nputs nil.to_s<\/pre>\n<h4>\u5b9f\u884c\u7d50\u679c<\/h4>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-4151\" src=\"http:\/\/www.code-magagine.com\/wp-content\/uploads\/2018\/06\/to_s\u5b9f\u884c\u7d50\u679c.png\" alt=\"\" width=\"305\" height=\"76\" srcset=\"http:\/\/www.code-magagine.com\/wp-content\/uploads\/2018\/06\/to_s\u5b9f\u884c\u7d50\u679c.png 305w, http:\/\/www.code-magagine.com\/wp-content\/uploads\/2018\/06\/to_s\u5b9f\u884c\u7d50\u679c-300x75.png 300w\" sizes=\"(max-width: 305px) 100vw, 305px\" \/><\/p>\n<h3>Float<\/h3>\n<p>\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u30af\u30e9\u30b9\uff08\u5c0f\u6570\u70b9\u4ee5\u4e0b\u3092\u6271\u3048\u308b\uff09<\/p>\n<h4>round\u30e1\u30bd\u30c3\u30c9<\/h4>\n<p>\u56db\u6368\u4e94\u5165\u3092\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true \">1.3.round # 1<\/pre>\n<h4>ceil\u30e1\u30bd\u30c3\u30c9<\/h4>\n<p>\u5207\u308a\u4e0a\u3052\u3092\u884c\u3046\u3002<\/p>\n<pre class=\"lang:default decode:true \">1.3.ceil # 2<\/pre>\n<h4>floor\u30e1\u30bd\u30c3\u30c9<\/h4>\n<p>\u5207\u308a\u6368\u3066\u3092\u884c\u3046\u3002<\/p>\n<pre class=\"lang:default decode:true\">1.3.floor # 1<\/pre>\n<h4>Float\u306e\u6ce8\u610f\u70b9<\/h4>\n<p>\u56db\u5247\u6f14\u7b97\u3059\u308b\u3068\u4e38\u3081\u8aa4\u5dee\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002BigDecimal\u306a\u3069\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u3046\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002\uff08Float\u306e\u3088\u3046\u306b\u7d44\u307f\u8fbc\u307f\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u306f\u306a\u3044\u306e\u3067require\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002\uff09<\/p>\n<h3>Enumerator<\/h3>\n<p>Integer\u30af\u30e9\u30b9\u306btimes\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\u3053\u3068\u3067\u751f\u6210\u3067\u304d\u308b\u3002\u6307\u5b9a\u56de\u6570\u3092\u7e70\u308a\u8fd4\u3059\u5834\u5408\u3068\u304b\u306b\u4f7f\u3063\u305f\u308a\u3059\u308b\u3002<\/p>\n<pre class=\"lang:default decode:true\">3.times do |m|\r\n  puts m # 1\u30012\u30013\r\nend\r\n<\/pre>\n<h2>True\/False\u30af\u30e9\u30b9<\/h2>\n<p>\u4e3b\u306b\u6761\u4ef6\u5206\u5c90\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n<h2>\u30c7\u30fc\u30bf\u578b\u306e\u30c1\u30a7\u30c3\u30af\u65b9\u6cd5<\/h2>\n<pre class=\"lang:default decode:true\">\u5bfe\u8c61.class<\/pre>\n<p>\u5bfe\u8c61\u306b\u306f\u5909\u6570\u540d\u3092\u6307\u5b9a\u3057\u3066\u3082\u826f\u3044\u3067\u3059\u3057\u3001\u6570\u5024\u3068\u304b\u6587\u5b57\u5217\u3092\u305d\u306e\u307e\u307e\u6307\u5b9a\u3057\u3066\u3082\u69cb\u3044\u307e\u305b\u3093\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"Ruby\u306f\u52d5\u7684\u578b\u4ed8\u3051\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u306a\u306e\u3067\u660e\u793a\u7684\u306b\u5ba3\u8a00\u306f\u3057\u307e\u305b\u3093\u304c\u3001\u5909\u6570\u306b\u5024\u3092\u4ee3\u5165\u3057\u305f\u77ac\u9593\u306b\u4e0b\u8a18\u306e\u3088\u3046\u306a\u30c7\u30fc\u30bf\u578b\u306e\u30af\u30e9\u30b9\u304c\u4f7f\u308f\u308c\u3066\u3044\u308b\u306e\u3067\u899a\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002 String\u30af\u30e9\u30b9\uff08\u6587\u5b57\u5217\uff09 \u6587\u5b57\u5217\u64cd\u4f5c upcase\u30e1 [&hellip;]","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[48],"tags":[],"_links":{"self":[{"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/posts\/8597"}],"collection":[{"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=8597"}],"version-history":[{"count":12,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/posts\/8597\/revisions"}],"predecessor-version":[{"id":20473,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/posts\/8597\/revisions\/20473"}],"wp:attachment":[{"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=8597"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8597"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8597"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}