{"id":2987,"date":"2021-11-18T06:03:45","date_gmt":"2021-11-17T21:03:45","guid":{"rendered":"https:\/\/suzutukiblog.com\/?p=2987"},"modified":"2022-01-22T06:12:59","modified_gmt":"2022-01-21T21:12:59","slug":"rails-tutorial4-8","status":"publish","type":"post","link":"https:\/\/suzutukiblog.com\/index.php\/2021\/11\/18\/rails-tutorial4-8\/","title":{"rendered":"Rails-tutorial\u81ea\u5206\u7528\u307e\u3068\u30814.8(Ruby \u6f14\u7fd2)"},"content":{"rendered":"

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

4.4 Ruby\u306b\u304a\u3051\u308b\u30af\u30e9\u30b9<\/h3>\n

Ruby\u3067\u306f\u3042\u3089\u3086\u308b\u3082\u306e\u304c\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/p>\n

4.4.1 \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf<\/h3>\n

\u30c0\u30d6\u30eb\u30af\u30a9\u30fc\u30c8\u3092\u4f7f\u3063\u3066\u6587\u5b57\u5217\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u6210\u3057\u307e\u3057\u305f\u304c\u3001
\n\u3053\u308c\u306f\u6587\u5b57\u5217\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u6697\u9ed9\u3067\u4f5c\u6210\u3059\u308b\u30ea\u30c6\u30e9\u30eb\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3002<\/p>\n

>> s = \"foobar\" # \u30c0\u30d6\u30eb\u30af\u30a9\u30fc\u30c8\u306f\u5b9f\u306f\u6587\u5b57\u5217\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf<\/strong>\r\n=> \"foobar\" >> s.class => String<\/strong>\r\n>> f = 2 => 2 >> f.class => Integer<\/strong>\r\n>> g = 1.1 => 1.1 >> g.class => Float<\/strong><\/pre>\n
\u6587\u5b57\u5217\u304cclass\u30e1\u30bd\u30c3\u30c9\u306b\u5fdc\u7b54\u3057\u3066\u304a\u308a\u3001
\n\u305d\u306e\u6587\u5b57\u5217\u304c\u6240\u5c5e\u3059\u308b\u30af\u30e9\u30b9\u3092\u5358\u306b\u8fd4\u3057\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002
\n\u306a\u304a\u914d\u5217\u3067\u3082\u3001\u6587\u5b57\u5217\u3068\u540c\u69d8\u306b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3067\u304d\u307e\u3059\u3002<\/p>\n
>> a = Array.new([1, 3, 2])<\/strong>\r\n=> [1, 3, 2]<\/strong><\/pre>\n
\u30cf\u30c3\u30b7\u30e5\u306e\u5834\u5408\u306f\u82e5\u5e72\u7570\u306a\u308a\u307e\u3059\u3002\u914d\u5217\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3067\u3042\u308b
\nArray.new \u306f\u914d\u5217\u306e\u521d\u671f\u5024\u3092\u5f15\u6570\u306b\u53d6\u308a\u307e\u3059\u304c\u3001
\nHash.new \u306f\u30cf\u30c3\u30b7\u30e5\u306e\u30c7\u30d5\u30a9\u30eb\u30c8 \u5024\u3092\u5f15\u6570\u306b\u53d6\u308a\u307e\u3059\u3002
\n\u3053\u308c\u306f\u3001\u30ad\u30fc\u304c\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3067\u3059\u3002<\/p>\n
>> h = Hash.new<\/strong>\r\n=> {}<\/strong>\r\n>> h[:foo] # \u5b58\u5728\u3057\u306a\u3044\u30ad\u30fc (:foo) \u306e\u5024\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3066\u307f\u308b<\/strong>\r\n=> nil<\/strong>\r\n>> h = Hash.new(0) # \u5b58\u5728\u3057\u306a\u3044\u30ad\u30fc\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092nil\u304b\u30890\u306b\u3059\u308b<\/strong>\r\n=> {}<\/strong>\r\n>> h[:foo]<\/strong>\r\n=> 0<\/strong><\/pre>\n
\u30e1\u30bd\u30c3\u30c9\u304c\u30af\u30e9\u30b9\u81ea\u8eab (\u3053\u306e\u5834\u5408\u306fnew) \u306b\u5bfe\u3057\u3066\u547c\u3073\u51fa\u3055\u308c\u308b\u3068\u304d\u3001
\n\u3053\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u30af\u30e9\u30b9\u30e1\u30bd\u30c3\u30c9\u3068\u547c\u3073\u307e\u3059\u3002
\n\u30af\u30e9\u30b9\u306enew\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u305f\u7d50\u679c\u306f\u3001\u305d\u306e\u30af\u30e9\u30b9\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u3042\u308a\u3001
\n\u3053\u308c\u306f\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3068\u3082\u547c\u3070\u308c\u307e\u3059\u3002
\nlength\u306e\u3088\u3046\u306b\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306b\u5bfe\u3057\u3066\u547c\u3073\u51fa\u3059\u30e1\u30bd\u30c3\u30c9\u306f
\n\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u3068\u547c\u3070\u308c\u307e\u3059\u3002<\/p>\n
\u6f14\u7fd2<\/h2>\n
1\uff1a1\u304b\u308910\u306e\u7bc4\u56f2\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u751f\u6210\u3059\u308b\u30ea\u30c6\u30e9\u30eb\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306f\u4f55\u3067\u3057\u305f\u304b? (\u5fa9\u7fd2\u3067\u3059)<\/h3>\n
a = 1..10<\/strong>
\n=> 1..10<\/strong><\/p>\n
2\uff1a\u4eca\u5ea6\u306fRange\u30af\u30e9\u30b9\u3068new\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u30011\u304b\u308910\u306e\u7bc4\u56f2\u30aa\u30d6\u30b8\u30a7\u30af\u30c8
\n\u3092\u4f5c\u3063\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002\u30d2\u30f3\u30c8: new\u30e1\u30bd\u30c3\u30c9\u306b2\u3064\u306e\u5f15\u6570\u3092\u6e21\u3059\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059<\/h3>\n
>> b = Range.new(1,10)<\/strong>
\n=> 1..10<\/strong><\/p>\n
3\uff1a\u6bd4\u8f03\u6f14\u7b97\u5b50==\u3092\u4f7f\u3063\u3066\u3001\u4e0a\u8a18\uff12\u3064\u306e\u8ab2\u984c\u3067\u4f5c\u3063\u305f\u305d\u308c\u305e\u308c\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c
\n\u540c\u3058\u3067\u3042\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/h3>\n
a == b<\/strong>
\n=> true<\/strong><\/p>\n
superclass\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u30af\u30e9\u30b9\u968e\u5c64\u3092\u8abf\u3079\u3066\u307f\u308b\u3068\u3088\u304f\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n
>> s = String.new(\"foobar\")<\/strong>\r\n=> \"foobar\"<\/strong>\r\n>> s.class # \u5909\u6570s\u306e\u30af\u30e9\u30b9\u3092\u8abf\u3079\u308b<\/strong>\r\n=> String<\/strong>\r\n>> s.class.superclass # String\u30af\u30e9\u30b9\u306e\u89aa\u30af\u30e9\u30b9\u3092\u8abf\u3079\u308b<\/strong>\r\n=> Object<\/strong>\r\n>> s.class.superclass.superclass # Ruby 1.9\u304b\u3089BasicObject\u304c\u5c0e\u5165<\/strong>\r\n=> BasicObject<\/strong>\r\n>> s.class.superclass.superclass.superclass<\/strong>\r\n=> nil<\/strong><\/pre>\n
“Ruby\u3067\u306f\u3042\u3089\u3086\u308b\u3082\u306e\u304c\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u3042\u308b” \u3068\u3044\u3046\u3053\u3068\u306e\u6280\u8853\u7684\u306a\u610f\u5473\u3002<\/p>\n
Word\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3057\u3001\u305d\u306e\u4e2d\u306b\u3042\u308b\u5358\u8a9e\u3092\u524d\u304b\u3089\u3068\u5f8c\u308d\u304b\u3089\u306e\u3069\u3061\u3089\u304b\u3089\u8aad\u3093\u3067\u3082\u540c\u3058 (\u3064\u307e\u308a\u56de\u6587\u306b\u306a\u3063\u3066\u3044\u308b) \u306a\u3089\u3070true\u3092\u8fd4\u3059palindrome?\u30e1\u30bd\u30c3\u30c9\u3092\u4f5c\u6210\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
> class Word<\/strong>\r\n>> def palindrome?(string)<\/strong>\r\n>> string == string.reverse<\/strong>\r\n>> end<\/strong>\r\n>> end<\/strong>\r\n=> :palindrome?<\/strong><\/pre>\n
\u3053\u306e\u30af\u30e9\u30b9\u3068\u30e1\u30bd\u30c3\u30c9\u306f\u6b21\u306e\u3088\u3046\u306b\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
>> w = Word.new # Word\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3059\u308b<\/strong>\r\n=> #<Word:0x22d0b20><\/strong>\r\n>> w.palindrome?(\"foobar\")<\/strong>\r\n=> false<\/strong>\r\n>> w.palindrome?(\"level\")<\/strong>\r\n=> true<\/strong><\/pre>\n
<\/p>\n
\u6587\u5b57\u5217\u3092\u5f15\u6570\u306b\u53d6\u308b\u30e1\u30bd\u30c3\u30c9\u3092\u4f5c\u308b\u305f\u3081\u3060\u3051\u306b\u3001\u308f\u3056\u308f\u3056\u65b0\u3057\u3044\u30af\u30e9\u30b9\u3092\u4f5c\u308b\u306e\u306f\u5909\u3067\u5358\u8a9e\u306f\u6587\u5b57\u5217\u306a\u306e\u3067\u3001\u2193\u306e\u3088\u3046\u306bWord\u30af\u30e9\u30b9\u306f String\u30af\u30e9\u30b9\u3092\u7d99\u627f\u3059\u308b\u306e\u304c\u81ea\u7136\u3067
\n(\u6b21\u306e\u30ea\u30b9\u30c8\u3092\u5165\u529b\u3059\u308b\u524d\u306b\u3001\u53e4\u3044Word\u30af\u30e9\u30b9\u306e\u5b9a\u7fa9\u3092\u6d88\u53bb\u3059\u308b\u305f\u3081\u306b\u3001Rails\u30b3\u30f3\u30bd\u30fc\u30eb\u3092\u3044\u3063\u305f\u3093\u7d42\u4e86)\u3002<\/p>\n
\u30b3\u30f3\u30bd\u30fc\u30eb\u3067Word\u30af\u30e9\u30b9\u3092\u5b9a\u7fa9<\/h3>\n
class Word < String #Word\u30af\u30e9\u30b9\u306fString\u30af\u30e9\u30b9\u3092\u7d99\u627f\u3059\u308b<\/strong>\r\n\r\ndef palindrome? #\u6587\u5b57\u5217\u304c\u56de\u6587\u3067\u3042\u308c\u3070true\u3092\u8fd4\u3059<\/strong>\r\n  self == self.reverse #self\u306f\u6587\u5b57\u5217\u81ea\u8eab\u3092\u8868\u3057\u307e\u3059<\/strong>\r\n  self == reverse #\u3053\u308c\u3067\u3082\u52d5\u304f\u3088.self\u306f\u7701\u7565\u53ef\u306a\u306e\u3067<\/strong>\r\n end<\/strong>\r\nend<\/strong>\r\n=> :palindrome?<\/strong><\/pre>\n
\u2191\u306e\u30b3\u30fc\u30c9\u306f\u7d99\u627f\u306e\u305f\u3081\u306eRuby\u306eWord < String\u8a18\u6cd5\u3002\u3053\u3046\u3059\u308b\u3053\u3068\u3067\u3001\u65b0\u3057\u3044palindrome?\u30e1\u30bd\u30c3\u30c9\u3060\u3051\u3067\u306f\u306a\u304f\u3001String\u30af\u30e9\u30b9\u304c\u6271\u3048\u308b\u3059\u3079\u3066\u306e\u30e1\u30bd\u30c3\u30c9\u304cWord\u30af\u30e9\u30b9\u3067\u3082\u4f7f\u3048\u308b\u3088\u3046\u306b\u306a\u308b\u3002<\/p>\n
String\u30af\u30e9\u30b9\u306e\u5185\u90e8\u3067\u306f\u3001\u30e1\u30bd\u30c3\u30c9\u3084\u5c5e\u6027\u3092\u547c\u3073\u51fa\u3059\u3068\u304d\u306eself.\u3082\u7701\u7565\u53ef\u80fd\u3067\u3059\u3002self == reverse #\u3053\u308c\u3067\u3082\u52d5\u304d\u307e\u3059\u3002.self\u306f\u7701\u7565\u53ef\u306a\u306e\u3067<\/p>\n
\u6f14\u7fd2<\/h2>\n
1:Range\u30af\u30e9\u30b9\u306e\u7d99\u627f\u968e\u5c64\u3092\u8abf\u3079\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002\u540c\u69d8\u306b\u3057\u3066\u3001
\nHash\u3068Symbol\u30af\u30e9\u30b9\u306e\u7d99\u627f\u968e\u5c64\u3082\u8abf\u3079\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/h3>\n
>> s.class<\/strong>\r\n=> Word<\/strong>\r\n>> s.class.superclass<\/strong>\r\n=> Range<\/strong>\r\n>> s.class.superclass.superclass<\/strong>\r\n=> Object<\/strong>\r\n>> s.class.superclass.superclass.superclass<\/strong>\r\n=> BasicObject<\/strong><\/pre>\n
2: \u306b\u3042\u308bself.reverse\u306eself\u3092\u7701\u7565\u3057\u3001reverse\u3068\u66f8\u3044\u3066\u3082\u3046\u307e\u304f\u52d5\u304f\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/h3>\n
Ruby\u3067\u306f\u7d44\u307f\u8fbc\u307f\u306e\u57fa\u672c\u30af\u30e9\u30b9\u306e\u62e1\u5f35\u304c\u53ef\u80fd\u306a\u306e\u3067\u3059\u3002
\nRuby\u306e\u30af\u30e9\u30b9\u306f\u30aa\u30fc\u30d7\u30f3\u3067\u5909\u66f4\u53ef\u80fd\u3067\u3042\u308a\u3001
\n\u30af\u30e9\u30b9\u8a2d\u8a08\u8005\u3067\u306a\u3044\u958b\u767a\u8005\u3067\u3082\u3053\u308c\u3089\u306e\u30af\u30e9\u30b9\u306b\u30e1\u30bd\u30c3\u30c9\u3092\u81ea\u7531\u306b\u8ffd\u52a0\u3059\u308b\u3053\u3068\u304c\u8a31\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n
class String #\u6587\u5b57\u5217\u304c\u56de\u6587\u3067\u3042\u308c\u3070true\u3092\u8fd4\u3059<\/p>\n
def palindrome?<\/strong>\r\n  self == self.reverse<\/strong>\r\n end<\/strong>\r\nend<\/strong>\r\n:String<\/strong>\r\n\"deified\".palindrome?<\/strong>\r\ntrue<\/strong><\/pre>\n
Ruby\u3067\u7d44\u307f\u8fbc\u307f\u30af\u30e9\u30b9(\u6700\u521d\u304b\u3089\u4e88\u7d04\u3055\u308c\u3066\u3044\u308b\u30af\u30e9\u30b9)\u306b\u30e1\u30bd\u30c3\u30c9\u3092\u8ffd\u52a0\u3067\u304d\u308b\u3068\u3044\u3046\u3053\u3068\u306f\u5b9f\u306b\u3059\u3054\u3044\u3053\u3068\u771f\u306b\u6b63\u5f53\u306a\u7406\u7531\u304c\u306a\u3044\u9650\u308a\u3001\u7d44\u307f\u8fbc\u307f\u30af\u30e9\u30b9\u306b\u30e1\u30bd\u30c3\u30c9\u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068\u306f\u7121\u4f5c\u6cd5\u3002<\/p>\n
Rails\u306e\u5834\u5408\u3001\u7d44\u307f\u8fbc\u307f\u30af\u30e9\u30b9\u306e\u5909\u66f4\u3092\u6b63\u5f53\u5316\u3067\u304d\u308b\u7406\u7531\u304c\u3044\u304f\u3064\u3082\u3042\u308a\u307e\u3059\u3002
\n\u4f8b\u3048\u3070 Web \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u5909\u6570\u304c\u7d76\u5bfe\u306b\u7a7a\u767d\u306b\u306a\u3089\u306a\u3044\u3088\u3046\u306b\u3057\u305f\u304f\u306a\u308b\u3053\u3068\u304c\u3088\u304f\u3042\u308a\u307e\u3059(\u30e6\u30fc\u30b6\u30fc\u540d\u306a\u3069\u306f\u30b9\u30da\u30fc\u30b9\u3084\u305d\u306e\u4ed6\u306e\u7a7a\u767d\u6587\u5b57\u306b\u306a\u3063\u3066\u6b32\u3057\u304f\u306a\u3044\u3082\u306e\u3067\u3059) \u306e\u3067\u3001
\nRails\u306fblank?\u30e1\u30bd\u30c3\u30c9\u3092Ruby \u306b\u8ffd\u52a0\u3057\u3066\u3044\u307e\u3059\u3002
\nRails\u306e\u62e1\u5f35\u306f\u81ea\u52d5\u7684\u306bRails\u30b3\u30f3\u30bd\u30fc\u30eb\u306b\u3082\u53d6\u308a\u8fbc\u307e\u308c\u308b\u306e\u3067\u3001
\n\u6b21\u306e\u3088\u3046\u306b\u30b3\u30f3\u30bd\u30fc\u30eb\u3067\u62e1\u5f35\u306e\u7d50\u679c\u3092\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002
\n(\u6ce8\u610f: \u6b21\u306e\u30b3\u30fc\u30c9\u306f\u7d14\u7c8b\u306a irb \u3067\u306f\u52d5\u4f5c\u3057\u307e\u305b\u3093)<\/p>\n
>> \"\".blank?<\/strong>\r\n=> true<\/strong>\r\n>> \" \".empty?<\/strong>\r\n=> false<\/strong>\r\n>> \" \".blank?<\/strong>\r\n=> true<\/strong>\r\n>> nil.blank?<\/strong>\r\n=> true<\/strong><\/pre>\n
\u30b9\u30da\u30fc\u30b9\u304c\u96c6\u307e\u3063\u3066\u3067\u304d\u305f\u6587\u5b57\u5217\u306f\u7a7a (empty) \u3068\u306f\u8a8d\u8b58\u3055\u308c\u307e\u305b\u3093\u304c\u3001
\n\u7a7a\u767d(blank)\u3067\u3042\u308b\u3068\u8a8d\u8b58\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002
\nnil\u306f\u7a7a\u767d\u3068\u8a8d\u8b58\u3055\u308c\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u306a\u3002nil\u306f\u6587\u5b57\u5217\u3067\u306f\u306a\u3044\u306e\u3067\u3001
\nRails\u304c\u5b9f\u306fblank?\u30e1\u30bd\u30c3\u30c9\u3092String\u30af\u30e9\u30b9\u3067\u306f\u306a\u304f\u3001\u305d\u306e\u3055\u3089\u306b\u4e0a\u306e\u57fa\u5e95\u30af\u30e9\u30b9\u306b\u8ffd\u52a0\u3057\u3066\u3044\u308b\u3053\u3068\u304c\u63a8\u6e2c\u3067\u304d\u307e\u3059\u3002
\n\u305d\u306e\u57fa\u5e95\u30af\u30e9\u30b9\u3068\u306f\u3001(\u3053\u306e\u7ae0\u306e\u6700\u521d\u3067\u8aac\u660e\u3057\u305f)Object\u81ea\u8eab\u3067\u3059\u3002
\nRails\u306b\u3088\u3063\u3066Ruby\u306e\u7d44\u307f\u8fbc\u307f\u30af\u30e9\u30b9\u306b\u8ffd\u52a0\u304c\u884c\u308f\u308c\u3066\u3044\u308b\u4f8b\u306b\u3064\u3044\u3066\u306f\u3001\u3042\u3068\u3067\u8aac\u660e\u3042\u308a\u307e\u3059\u3002<\/p>\n
\u6f14\u7fd2<\/h2>\n
1:palindrome?\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u3001\u201cracecar\u201d\u304c\u56de\u6587\u3067\u3042\u308a\u3001\u201conomatopoeia\u201d\u304c\u56de\u6587\u3067\u306a\u3044\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002\u5357\u30a4\u30f3\u30c9\u306e\u8a00\u8449\u300cMalayalam\u300d\u306f\u56de\u6587\u3067\u3057\u3087\u3046\u304b?
\n\u30d2\u30f3\u30c8: downcase\u30e1\u30bd\u30c3\u30c9\u3067\u5c0f\u6587\u5b57\u306b\u3059\u308b\u3053\u3068\u3092\u5fd8\u308c\u306a\u3044\u3067\u3002<\/h3>\n
class String<\/strong>\r\n\r\ndef palindrome?<\/strong>\r\n  if self == reverse<\/strong>\r\n   puts \"palindrome!\"<\/strong>\r\n  else puts \"nonepalindrome!\"<\/strong>\r\n  end<\/strong>\r\n end<\/strong>\r\nend<\/strong>\r\n\r\ns = String.new(\"racecar\")<\/strong>\r\ns.palindrome?<\/strong>\r\ns = String.new(\"onomatopoeia\")<\/strong>\r\ns.palindrome?<\/strong>\r\ns = String.new(\"Malayalam\")<\/strong>\r\ns.downcase.palindrome?<\/strong><\/pre>\n
2:String\u30af\u30e9\u30b9\u306bshuffle\u30e1\u30bd\u30c3\u30c9\u3092\u8ffd\u52a0\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002
\n\u30d2\u30f3\u30c8:\u524d\u3084\u3063\u305f\u6f14\u7fd2\u304c\u53c2\u8003\u306b\u306a\u308a\u307e\u3059\u3002\uff1f\uff1f\u3092\u57cb\u3081\u3066\u304f\u3060\u3055\u3044\u3002<\/h3>\n
class String<\/strong>\r\n def shuffle<\/strong>\r\n   self.?('').?.?<\/strong>\r\n end<\/strong>\r\nend<\/strong>\r\n\"foobar\".shuffle<\/strong>\r\n\"borafo\"<\/strong>\r\n\r\nsplit shuffle join<\/strong><\/pre>\n
3:\u306e\u30b3\u30fc\u30c9\u306b\u304a\u3044\u3066\u3001self.\u3092\u524a\u9664\u3057\u3066\u3082\u3046\u307e\u304f\u52d5\u304f\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/h3>\n
class String<\/strong>\r\n def shuffle<\/strong>\r\n   split('').shuffle.join<\/strong>\r\n  end<\/strong>\r\n end<\/strong>\r\n\"foobar\".shuffle<\/strong>\r\n\"borafo\"<\/strong><\/pre>\n
4.4.4 \u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u30af\u30e9\u30b9<\/h3>\n
class StaticPagesController < ApplicationController<\/strong>\r\n\r\ndef home<\/strong>\r\nend<\/strong>\r\n\r\ndef help<\/strong>\r\nend<\/strong>\r\n\r\ndef about<\/strong>\r\nend<\/strong>\r\nend<\/strong><\/pre>\n
StaticPagesController\u306fApplicationController\u3092\u7d99\u627f\u3057\u3066\u5b9a\u7fa9\u3055\u308c\u308b
\nhome\u3084help\u3001about\u30a2\u30af\u30b7\u30e7\u30f3\u3092\u898b\u3066\u3044\u304f\u3002
\nRails\u30b3\u30f3\u30bd\u30fc\u30eb\u306f\u30bb\u30c3\u30b7\u30e7\u30f3\u3054\u3068\u306b\u30ed\u30fc\u30ab\u30eb\u306eRails\u74b0\u5883\u3092\u8aad\u307f\u8fbc\u3080\u306e\u3067\u3001
\n\u30b3\u30f3\u30bd\u30fc\u30eb\u5185\u3067\u660e\u793a\u7684\u306b\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u3092\u4f5c\u6210\u3057\u305f\u308a\u3001
\n\u305d\u306e\u30af\u30e9\u30b9\u968e\u5c64\u3092\u8abf\u3079\u305f\u308a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n
Rails\u30b3\u30f3\u30bd\u30fc\u30eb\u3067\u306f\u3001\u305d\u306e\u4e2d\u304b\u3089\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u306e\u30a2\u30af\u30b7\u30e7\u30f3
\n(\u5b9f\u306f\u30e1\u30bd\u30c3\u30c9) \u3092\u547c\u3076\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n
>> controller.home<\/strong>\r\n=> nil<\/strong><\/pre>\n
\u3053\u3053\u3067\u306f\u3001home\u30a2\u30af\u30b7\u30e7\u30f3\u306e\u4e2d\u8eab\u306f\u7a7a\u306a\u306e\u3067nil\u304c\u8fd4\u3055\u308c\u307e\u3059\u3002<\/p>\n
\u7b2c3\u7ae0\u3067\u306f\u4e00\u5ea6\u3082StaticPagesController.new\u3092\u5b9f\u884c\u3057\u307e\u305b\u3093\u3067\u3057\u305f\u3002
\n\u5b9f\u306f\u3001Rails\u306f\u78ba\u304b\u306bRuby\u3067\u66f8\u304b\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u65e2\u306bRuby\u3068\u306f\u5225\u7269\u306a\u306e\u3067\u3059\u3002
\nRails\u306e\u30af\u30e9\u30b9\u306f\u3001\u666e\u901a\u306eRuby\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u540c\u69d8\u306b\u632f\u308b\u821e\u3046\u3082\u306e\u3082\u3042\u308a\u307e\u3059\u304c\u3001\u591a\u304f\u306e\u30af\u30e9\u30b9\u306b\u306fRails\u306e\u9b54\u6cd5\u306e\u7c89\u304c\u632f\u308a\u304b\u3051\u3089\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u6f14\u7fd2<\/h2>\n
1:\u7b2c2\u7ae0\u3067\u4f5c\u3063\u305fToy\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3067Rails\u30b3\u30f3\u30bd\u30fc\u30eb\u3092\u958b\u304d\u3001
\nUser.new\u3068\u5b9f\u884c\u3059\u308b\u3053\u3068\u3067user\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u751f\u6210\u3067\u304d\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u307f\u3088\u3046\u3002<\/h3>\n
>>User.new<\/strong>\r\n=> #<User id: nil, name: nil, email: nil,<\/strong>\r\ncreated_at: nil, updated_at: nil><\/strong><\/pre>\n
2:\u751f\u6210\u3057\u305fuser\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30af\u30e9\u30b9\u306e\u7d99\u627f\u968e\u5c64\u3092\u8abf\u3079\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/h3>\n
User => ApplicationRecord(abstract)=> ActiveRecord::Base=><\/strong>\r\nObject=> BasicObject<\/strong><\/pre>\n
\u30e6\u30fc\u30b6\u30fc\u30af\u30e9\u30b9<\/h3>\n
class User<\/strong>\r\nattr_accessor :name, :email<\/strong>\r\n\r\ndef initialize(attributes = {})<\/strong>\r\n @name = attributes[:name]<\/strong>\r\n @email = attributes[:email]<\/strong>\r\nend<\/strong>\r\n\r\ndef formatted_email<\/strong>\r\n  \"#{@name} <#{@email}>\"<\/strong>\r\n end<\/strong>\r\nend<\/strong><\/pre>\n
attr_accessor :name, :email<\/p>\n
\u30e6\u30fc\u30b6\u30fc\u540d\u3068\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9(\u5c5e\u6027: attribute)\u306b\u5bfe\u5fdc\u3059\u308b\u30a2
\n\u30af\u30bb\u30b5\u30fc(accessor)\u3092\u305d\u308c\u305e\u308c\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n
\u30a2\u30af\u30bb\u30b5\u30fc\u3092\u4f5c\u6210\u3059\u308b\u3068\u3001\u305d\u306e\u30c7\u30fc\u30bf\u3092\u53d6\u308a\u51fa\u3059\u30e1\u30bd\u30c3\u30c9(getter)\u3068\u3001\u30c7\u30fc\u30bf\u306b\u4ee3\u5165\u3059\u308b\u30e1\u30bd\u30c3\u30c9(setter)\u3092\u305d\u308c\u305e\u308c\u5b9a\u7fa9\u3057\u3066\u304f\u308c\u307e\u3059\u3002\u5177\u4f53\u7684\u306b\u306f\u3001\u3053\u306e\u884c\u3092\u5b9f\u884c\u3057\u305f\u3053\u3068\u306b\u3088\u308a\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570@name\u3068\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570@email\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u305f\u3081\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u7528\u610f\u3055\u308c\u307e\u3059\u3002<\/p>\n
Rails\u3067\u306f\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u3092\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u5185\u3067\u5ba3\u8a00\u3059\u308b\u3060\u3051\u3067\u30d3\u30e5\u30fc\u3067\u4f7f\u3048\u308b\u3088\u3046\u306b\u306a\u308b\u3001\u3068\u3044\u3063\u305f\u70b9\u306b\u4e3b\u306a\u5229\u7528\u4fa1\u5024\u304c\u3042\u308a\u307e\u3059\u3002
\n\u305f\u3060\u4e00\u822c\u7684\u306b\u306f\u3001\u305d\u306e\u30af\u30e9\u30b9\u5185\u3067\u3042\u308c\u3070\u3069\u3053\u304b\u3089\u3067\u3082\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u5909\u6570\u3068\u3057\u3066\u4f7f\u308f\u308c\u307e\u3059(\u3053\u308c\u306b\u3064\u3044\u3066\u306f\u5f8c\u3067\u8a73\u3057\u304f\u8aac\u660e\u3057\u307e\u3059)\u3002
\n\u305d\u3057\u3066\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u306f\u5e38\u306b@\u8a18\u53f7\u3067\u59cb\u307e\u308a\u3001\u307e\u3060\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u306a\u3051\u308c\u3070\u5024\u304cnil\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
initialize\u306f\u3001Ruby\u306e\u7279\u6b8a\u306a\u30e1\u30bd\u30c3\u30c9\u3067,\u3053\u308c\u306f User.new\u3092\u5b9f\u884c\u3059\u308b\u3068
\n\u81ea\u52d5\u7684\u306b\u547c\u3073\u51fa\u3055\u308c\u308b\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002\u3053\u306e\u5834\u5408\u306einitialize\u30e1\u30bd\u30c3\u30c9\u306f\u3001
\n\u6b21\u306e\u3088\u3046\u306battributes\u3068\u3044\u3046\u5f15\u6570\u30921\u3064\u53d6\u308a\u307e\u3059\u3002<\/p>\n
def initialize(attributes = {})<\/strong>\r\n @name = attributes[:name]<\/strong>\r\n @email = attributes[:email]<\/strong>\r\nend<\/strong><\/pre>\n
\u4e0a\u306e\u30b3\u30fc\u30c9\u3067\u3001attributes\u5909\u6570\u306f\u7a7a\u306e\u30cf\u30c3\u30b7\u30e5\u3092\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u5024\u3068\u3057\u3066\u6301\u3064\u305f\u3081\u3001
\n\u540d\u524d\u3084\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306e\u306a\u3044\u30e6\u30fc\u30b6\u30fc\u3092\u4f5c\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002
\n(\u5b58\u5728\u3057\u306a\u3044\u30ad\u30fc\u306b\u5bfe\u3057\u3066\u30cf\u30c3\u30b7\u30e5\u306fnil\u3092\u8fd4\u3059\u306e\u3067,:name\u30ad\u30fc\u304c\u306a\u3051\u308c\u3070attributes[:name]\u306fnil\u306b\u306a\u308a\u3001\u540c\u3058\u3053\u3068\u304cattributes[:email]\u306b\u3082\u8a00\u3048\u308b)<\/p>\n
\u6700\u5f8c\u306b\u3001formatted_email\u30e1\u30bd\u30c3\u30c9\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002\u3053\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u3001
\n\u6587\u5b57\u5217\u306e\u5f0f\u5c55\u958b\u3092\u5229\u7528\u3057\u3066\u3001@name\u3068@email\u306b\u5272\u308a\u5f53\u3066\u3089\u308c\u305f\u5024\u3092
\n\u30e6\u30fc\u30b6\u30fc\u306e\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3068\u3057\u3066\u69cb\u6210\u3057\u307e\u3059\u3002<\/p>\n
def formatted_email<\/strong>\r\n  \"#{@name} <#{@email}>\"<\/strong>\r\nend<\/strong><\/pre>\n
@\u8a18\u53f7\u306b\u3088\u3063\u3066\u793a\u3055\u308c\u3066\u3044\u308b\u3068\u304a\u308a\u3001
\n@name\u3068@email\u306f\u4e21\u65b9\u3068\u3082\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u306a\u306e\u3067
\n\u81ea\u52d5\u7684\u306bformatted_email\u30e1\u30bd\u30c3\u30c9\u3067\u4f7f\u3048\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
Rails\u30b3\u30f3\u30bd\u30fc\u30eb\u3092\u8d77\u52d5\u3057\u3001example_user\u306e\u30b3\u30fc\u30c9\u3092require\u3057\u3066\u3001
\n\u81ea\u4f5c\u3057\u305f\u30af\u30e9\u30b9\u3092\u8a66\u3057\u306b\u4f7f\u3063\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
require '.\/example_user' #example_user\u306e\u30b3\u30fc\u30c9\u3092\u8aad\u307f\u8fbc\u3080\u65b9\u6cd5<\/strong>\r\n=>true<\/strong>\r\nexample = User.new<\/strong>\r\n=>#<User:0x224ceec @email=nil, @name=nil><\/strong>\r\nexample.name # attributes[:name]\u306f\u5b58\u5728\u3057\u306a\u3044\u306e\u3067nil<\/strong>\r\n=>nil<\/strong>\r\nexample.name = \"Example User\" #\u540d\u524d\u3092\u4ee3\u5165\u3059\u308b<\/strong>\r\n=>\"Example User\"<\/strong>\r\nexample.email = \"user@example.com\" #\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3092\u4ee3\u5165\u3059\u308b<\/strong>\r\n=>\"user@example.com\"<\/strong>\r\nexample.formatted_email<\/strong>\r\n=>\"Example User <user@example.com>\"<\/strong><\/pre>\n
require\u306e\u30d1\u30b9\u306b\u3042\u308b\u2019.\u2019\u306f\u3001Unix\u306e \u201c\u30ab\u30ec\u30f3\u30c8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u201d\u3092\u8868\u3057
\n\u2019.\/example_user\u2019\u3068\u3044\u3046\u30d1\u30b9\u306f\u3001\u30ab\u30ec\u30f3\u30c8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u304b\u3089\u306e\u76f8\u5bfe\u30d1\u30b9\u3067example_user\u30d5\u30a1\u30a4\u30eb\u3092\u63a2\u3059\u3088\u3046\u306bRuby\u306b\u6307\u793a\u3057\u307e\u3059\u3002
\n\u6b21\u306e\u30b3\u30fc\u30c9\u3067\u306f\u7a7a\u306eexample_user\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002
\n\u6b21\u306b\u3001\u5bfe\u5fdc\u3059\u308b\u5c5e\u6027\u306b\u305d\u308c\u305e\u308c\u624b\u52d5\u3067\u5024\u3092\u4ee3\u5165\u3059\u308b\u3053\u3068\u3067\u3001
\n\u540d\u524d\u3068\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3092\u4e0e\u3048\u307e\u3059\u3088attr_accessor\u3092\u4f7f\u3063\u3066\u3044\u308b\u306e\u3067\u3001
\n\u3053\u308c\u3067\u4ee3\u5165\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059)\u3002
\n\u6b21\u306e\u30b3\u30fc\u30c9\u306f\u3001<\/p>\n
example.name = \"Example User\"<\/strong><\/pre>\n
@name\u5909\u6570\u306b”Example User”\u3068\u3044\u3046\u5024\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u540c\u69d8\u306bemail\u5c5e\u6027\u306b\u3082\u5024\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u5024\u306fformatted_email\u30e1\u30bd\u30c3\u30c9\u3067\u4f7f\u308f\u308c\u307e\u3059\u3002<\/p>\n
\u6700\u5f8c\u306e\u30cf\u30c3\u30b7\u30e5\u5f15\u6570\u306e\u6ce2\u30ab\u30c3\u30b3\u3092\u7701\u7565\u3067\u304d\u308b\u3053\u3068\u3092\u8aac\u660e\u3057\u307e\u3057\u305f\u3002
\n\u305d\u308c\u3068\u540c\u3058\u8981\u9818\u3067initialize\u30e1\u30bd\u30c3\u30c9\u306b\u30cf\u30c3\u30b7\u30e5\u3092\u6e21\u3059\u3053\u3068\u3067\u3001
\n\u5c5e\u6027\u304c\u5b9a\u7fa9\u6e08\u307f\u306e\u4ed6\u306e\u30e6\u30fc\u30b6\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
>> user = User.new(name: \"Michael Hartl\",<\/strong>\r\nemail: \"mhartl@example.com\")<\/strong>\r\n=> #<User:0x225167c @email=\"mhartl@example.com\",<\/strong>\r\n@name=\"Michael Hartl\"><\/strong>\r\n>> user.formatted_email<\/strong>\r\n=> \"Michael Hartl <mhartl@example.com>\"<\/strong><\/pre>\n
\u3053\u308c\u306f\u4e00\u822c\u306b\u30de\u30b9\u30a2\u30b5\u30a4\u30f3\u30e1\u30f3\u30c8(mass assignment)\u3068\u547c\u3070\u308c\u308b\u6280\u6cd5\u3067\u3001
\nRails\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u3088\u304f\u4f7f\u308f\u308c\u307e\u3059\u3002\u4f8b\u3048\u3070\u7b2c7\u7ae0\u306f\u3001\u5b9f\u969b\u306b\u30cf\u30c3\u30b7\u30e5
\n\u5f15\u6570\u3092\u4f7f\u3063\u3066\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u521d\u671f\u5316\u3059\u308b\u30b3\u30fc\u30c9\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
\u6f14\u7fd2<\/h3>\n
1:User\u30af\u30e9\u30b9\u3067\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308bname\u5c5e\u6027\u3092\u4fee\u6b63\u3057\u3066\u3001
\nfirst_name\u5c5e\u6027\u3068last_name\u5c5e\u6027\u306b\u5206\u5272\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002
\n\u307e\u305f\u3001\u305d\u308c\u3089\u306e\u5c5e\u6027\u3092\u4f7f\u3063\u3066 “Michael Hartl”\u3068\u3044\u3063\u305f\u6587\u5b57\u5217\u3092\u8fd4\u3059
\nfull_name\u30e1\u30bd\u30c3\u30c9\u3092\u5b9a\u7fa9\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002
\n\u6700\u5f8c\u306b\u3001formatted_email\u30e1\u30bd\u30c3\u30c9\u306ename\u306e\u90e8\u5206\u3092\u3001
\nfull_name\u306b\u7f6e\u304d\u63db\u3048\u3066\u307f\u307e\u3057\u3087\u3046
\n(\u5143\u3005\u306e\u7d50\u679c\u3068\u540c\u3058\u306b\u306a\u3063\u3066\u3044\u308c\u3070\u6210\u529f\u3067\u3059)<\/p>\n
example_user.rb<\/strong><\/p>\n
class User<\/strong>\r\nattr_accessor :first_name,:last_name, :email<\/strong>\r\n\r\n def initialize(attributes = {})<\/strong>\r\n   @first_name = attributes[:first_name]<\/strong>\r\n   @last_name = attributes[:last_name]<\/strong>\r\n   @email = attributes[:email]<\/strong>\r\n end<\/strong>\r\n\r\n def full_name<\/strong>\r\n   @full_name = \"#{@first_name} #{@last_name}\"<\/strong>\r\n end<\/strong>\r\n\r\n def formatted_email<\/strong>\r\n  \"#{@full_name} <#{@email}>\"<\/strong>\r\n end<\/strong>\r\nend<\/strong><\/pre>\n
rails console<\/p>\n
>>require '.\/example_user'<\/strong>\r\n=> true<\/strong>\r\n>>user = User.new(first_name: \"Michael\", last_name: \"Hartl\", email: \"mhartl@example.com\")<\/strong>\r\n=> #<User:0x00000002d21bd8 @first_name=\"Michael\", @last_name=\"Hartl\", @email=\"mhartl@example.com\"><\/strong>\r\n>>user.full_name<\/strong>\r\n=> \"Michael Hartl\"<\/strong>\r\n>>user.formatted_email<\/strong>\r\n=> \"Michael Hartl <mhartl@example.com>\"<\/strong><\/pre>\n
2:”Hartl, Michael” \u3068\u3044\u3063\u305f\u30d5\u30a9\u30fc\u30de\u30c3\u30c8 (\u82d7\u5b57\u3068\u540d\u524d\u304c\u30ab\u30f3\u30de+\u534a\u89d2\u30b9\u30da\u30fc\u30b9\u3067\u533a\u5207\u3089\u308c\u3066\u3044\u308b\u6587\u5b57\u5217) \u3067\u8fd4\u3059alphabetical_name\u30e1\u30bd\u30c3\u30c9\u3092\u5b9a\u7fa9\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/h3>\n
  def alphabetical_name<\/strong>\r\n    @alphabetical_name = \"#{@last_name}, #{@first_name}\"<\/strong>\r\n  end<\/strong><\/pre>\n
3:full_name.split\u3068alphabetical_name.split(‘, ‘).reverse\u306e\u7d50\u679c\u3092\u6bd4\u8f03\u3057
\n\u3001\u540c\u3058\u7d50\u679c\u306b\u306a\u308b\u304b\u3069\u3046\u304b\u78ba\u8a8d\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/h3>\n
>> user.full_name.split<\/strong>\r\n=> [\"Michael\", \"Hartl\"]<\/strong>\r\n>> user.alphabetical_name.split(', ').reverse<\/strong>\r\n=> [\"Hartl\", \"Michael\"<\/strong>\r\nfull_name.split == alphabetical_name.split(', ').reverse<\/strong><\/pre>\n
\u30dd\u30a4\u30f3\u30c8\u304c\u3042\u308b\u3068\u3059\u308b\u306a\u3089\u3001\u30c6\u30ad\u30b9\u30c8\u30a8\u30c7\u30a3\u30bf\u3067\u5909\u66f4\u3057\u3066\u30bb\u30fc\u30d6\u3057\u305f\u5834\u5408\u3001\u307e\u305frequire\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u308f\u306a\u3044\u3068\u5909\u66f4\u304c\u53cd\u6620\u3055\u308c\u306a\u3044\u3053\u3068\u306b\u6ce8\u610f\uff01\u3042\u3068\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u751f\u6210\u3057\u306a\u3044\u3068\u610f\u5473\u304c\u306a\u3044<\/p>\n
rm example_user.rb<\/strong><\/p>\n
4\u7ae0\u306e\u307e\u3068\u3081<\/h3>\n
1:Ruby\u306f\u6587\u5b57\u5217\u3092\u6271\u3046\u305f\u3081\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u591a\u6570\u6301\u3063\u3066\u3044\u308b\r\n<\/strong>\r\n2:Ruby\u306e\u4e16\u754c\u3067\u306f\u3001\u3059\u3079\u3066\u304c\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u3042\u308b\r\n<\/strong>\r\n3:Ruby\u3067\u306fdef\u3068\u3044\u3046\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u3063\u3066\u30e1\u30bd\u30c3\u30c9\u3092\u5b9a\u7fa9\u3059\u308b<\/strong>\r\n\r\n4:Ruby\u3067\u306fclass\u3068\u3044\u3046\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u3063\u3066\u30af\u30e9\u30b9\u3092\u5b9a\u7fa9\u3059\u308b<\/strong>\r\n\r\n5:Rails\u306e\u30d3\u30e5\u30fc\u3067\u306f\u3001\u9759\u7684HTML\u306e\u4ed6\u306bERB(\u57cb\u3081\u8fbc\u307fRuby:Embedded RuBy)\u3082\u4f7f\u3048\u308bRuby\u306e\u7d44\u307f\u8fbc\u307f\u30af\u30e9\u30b9\u306b\u306f\u914d\u5217\u3001\u7bc4\u56f2\u3001\u30cf\u30c3\u30b7\u30e5\u306a\u3069\u304c\u3042\u308b<\/strong>\r\n\r\n6:Ruby\u306e\u30d6\u30ed\u30c3\u30af\u306f (\u4ed6\u306e\u4f3c\u305f\u6a5f\u80fd\u3068\u6bd4\u3079) \u67d4\u8edf\u306a\u6a5f\u80fd\u3067\u3001\u6dfb\u3048\u5b57\u3092\u4f7f\u3063\u305f<\/strong>\r\n\u30c7\u30fc\u30bf\u69cb\u9020\u3088\u308a\u3082\u81ea\u7136\u306b\u30a4\u30c6\u30ec\u30fc\u30b7\u30e7\u30f3(\u7e70\u308a\u8fd4\u3057)\u304c\u3067\u304d\u308b<\/strong>\r\n\r\n7:\u30b7\u30f3\u30dc\u30eb\u3068\u306f\u30e9\u30d9\u30eb\u3067\u3042\u308b\u3002\u8ffd\u52a0\u7684\u306a\u69cb\u9020\u3092\u6301\u305f\u306a\u3044(\u4ee3\u5165\u306a\u3069\u304c\u3067\u304d\u306a\u3044)<\/strong>\r\n\u6587\u5b57\u5217\u307f\u305f\u3044\u306a\u3082\u306e<\/strong>\r\n\r\n8:Ruby\u3067\u306f\u30af\u30e9\u30b9\u3092\u7d99\u627f\u3067\u304d\u308b<\/strong>\r\n\r\n9:Ruby\u3067\u306f\u7d44\u307f\u8fbc\u307f\u30af\u30e9\u30b9(\u4e88\u7d04\u6e08\u307f\u306e\u30af\u30e9\u30b9)\u3067\u3059\u3089\u5185\u90e8\u3092\u898b\u305f\u308a\u4fee\u6b63\u3057\u305f\u308a\u3067\u304d\u308b<\/strong><\/pre>\n
\u305d\u306e\uff15\u306b\u7d9a\u304d\u307e\u3059<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
4.5\u304b\u3089\u7d9a\u304f 4.4 Ruby\u306b\u304a\u3051\u308b\u30af\u30e9\u30b9 Ruby\u3067\u306f\u3042\u3089\u3086\u308b\u3082\u306e\u304c\u30aa\u30d6\u30b8\u30a7\u30af\u30c8 4.4.1 \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf \u30c0\u30d6\u30eb\u30af\u30a9\u30fc\u30c8\u3092\u4f7f\u3063\u3066\u6587\u5b57\u5217\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u6210\u3057\u307e\u3057\u305f\u304c\u3001 \u3053\u308c\u306f\u6587\u5b57\u5217\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u6697\u9ed9\u3067\u4f5c\u6210\u3059\u308b […]<\/p>\n","protected":false},"author":1,"featured_media":2764,"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":[27,13],"tags":[],"class_list":["post-2987","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-programming-note","category-rails"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/posts\/2987","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=2987"}],"version-history":[{"count":10,"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/posts\/2987\/revisions"}],"predecessor-version":[{"id":4527,"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/posts\/2987\/revisions\/4527"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/media\/2764"}],"wp:attachment":[{"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/media?parent=2987"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/categories?post=2987"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/tags?post=2987"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}