{"id":2617,"date":"2022-05-19T21:41:02","date_gmt":"2022-05-19T13:41:02","guid":{"rendered":"https:\/\/jimmyswebnote.com\/?p=2617"},"modified":"2022-05-26T20:21:55","modified_gmt":"2022-05-26T12:21:55","slug":"ruby-method-object","status":"publish","type":"post","link":"https:\/\/jimmyswebnote.com\/ruby-method-object\/","title":{"rendered":"Ruby \u6559\u5b78 3 &#8211; method, \u57fa\u672c object \u4ecb\u7d39"},"content":{"rendered":"\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_65 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<p class=\"ez-toc-title\">Table of Contents<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-6633518b2062b\" class=\"ez-toc-cssicon-toggle-label\"><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><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6633518b2062b\"  aria-label=\"Toggle\" \/><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:\/\/jimmyswebnote.com\/ruby-method-object\/#1_Methods\" title=\"1. Methods\">1. Methods<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/jimmyswebnote.com\/ruby-method-object\/#11_default_return_value\" title=\"1.1 default return value\">1.1 default return value<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/jimmyswebnote.com\/ruby-method-object\/#12_return\" title=\"1.2 return\">1.2 return<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/jimmyswebnote.com\/ruby-method-object\/#13_call_method\" title=\"1.3 call method\">1.3 call method<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/jimmyswebnote.com\/ruby-method-object\/#14_local_variable\" title=\"1.4 local variable\">1.4 local variable<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/jimmyswebnote.com\/ruby-method-object\/#2_%E5%9F%BA%E6%9C%AC_Object_%E4%BB%8B%E7%B4%B9\" title=\"2. \u57fa\u672c Object \u4ecb\u7d39\">2. \u57fa\u672c Object \u4ecb\u7d39<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/jimmyswebnote.com\/ruby-method-object\/#21_class\" title=\"2.1 .class\">2.1 .class<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/jimmyswebnote.com\/ruby-method-object\/#22_superclass\" title=\"2.2 .superclass\">2.2 .superclass<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/jimmyswebnote.com\/ruby-method-object\/#23_methods\" title=\"2.3 .methods\">2.3 .methods<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/jimmyswebnote.com\/ruby-method-object\/#3_%E5%8F%83%E8%80%83%E8%B3%87%E6%96%99\" title=\"3. \u53c3\u8003\u8cc7\u6599\">3. \u53c3\u8003\u8cc7\u6599<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"1_Methods\"><\/span>1. Methods<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>methods \u985e\u4f3c JavaScript \u7684 function\uff0cdef \u958b\u982d\uff0cend \u7d50\u5c3e\uff1a<\/p>\n\n\n\n<h3><span class=\"ez-toc-section\" id=\"11_default_return_value\"><\/span>1.1 default return value<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u5982\u679c def \u548c end \u4e4b\u9593\u6c92\u6709\u4efb\u4f55\u6771\u897f\uff0c\u90a3 default return value \u70ba nil<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"ruby\" class=\"language-ruby\">def method\nend\n\np method\n# nil<\/code><\/pre>\n\n\n\n<h3><span class=\"ez-toc-section\" id=\"12_return\"><\/span>1.2 return<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u5728 Ruby \u4e2d\uff0cmethod \u6703\u81ea\u52d5 return \u6700\u5f8c\u4e00\u884c\uff0c\u5373\u4f7f\u6c92\u6709 return \u4e5f\u4e00\u6a23<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"ruby\" class=\"language-ruby\">def method\n  return \"Hello, world!\"\nend\np method\n# \"Hello, world!\"\n\ndef method\n  \"Hello, world!\"\nend\np method\n# \"Hello, world!\"<\/code><\/pre>\n\n\n\n<h3><span class=\"ez-toc-section\" id=\"13_call_method\"><\/span>1.3 call method<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>call method \u7684\u6642\u5019\uff0c\u53ef\u4ee5\u52a0 ()\uff0c\u4e5f\u53ef\u4ee5\u4e0d\u52a0 ()\uff0c\u4e0d\u52a0 () \u7684\u6642\u5019\u7528, \u628a argument \u9694\u958b\u3002<br>\u901a\u5e38 method \u6709 argument \u7684\u6642\u5019\u6703\u5efa\u8b70\u52a0 ()\uff0c\u53ef\u8b80\u6027\u6703\u6bd4\u8f03\u597d\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"ruby\" class=\"language-ruby\"># \u4e0d\u52a0 () \u7684\u5beb\u6cd5\ndef method arg1, arg2\n  \"Hello, #{arg1} world! #{arg1}\"\nend\np method \"Jimmy\", \"Wow\"\n# \"Hello, Jimmy world! Jimmy\"\n\n# \u52a0 () \u7684\u5beb\u6cd5\ndef method(arg1, arg2)\n  \"Hello, #{arg1} world! #{arg1}\"\nend\np method(\"Jimmy\", \"Wow\")\n# \"Hello, Jimmy world! Jimmy\"<\/code><\/pre>\n\n\n\n<h3><span class=\"ez-toc-section\" id=\"14_local_variable\"><\/span>1.4 local variable<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u5728 method \u4e2d\u5b9a\u7fa9\u7684\u8b8a\u6578\uff0c\u53ea\u5b58\u5728\u65bc method \u4e2d\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"ruby\" class=\"language-ruby\">str = \"Hello, world!\"\ndef method\n  str = \"Wow\"\n  str\nend\n\np method\n# \"Wow\"\np str\n# \"Hello, world!\"<\/code><\/pre>\n\n\n\n<h2><span class=\"ez-toc-section\" id=\"2_%E5%9F%BA%E6%9C%AC_Object_%E4%BB%8B%E7%B4%B9\"><\/span>2. \u57fa\u672c Object \u4ecb\u7d39<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u5982\u540c\u5728 <a href=\"https:\/\/jimmyswebnote.com\/ruby-tutorial-introduction\/#33_OOP\" data-type=\"URL\" data-id=\"https:\/\/jimmyswebnote.com\/ruby-tutorial-introduction\/#33_OOP\">Ruby \u6559\u5b78 1 \u2013 \u74b0\u5883\u67b6\u8a2d\u53ca Ruby \u4ecb\u7d39<\/a> \u63d0\u5230\u7684\uff0cRuby \u662f\u4e00\u500b OOP \u7684\u7a0b\u5f0f\u8a9e\u8a00\uff0c\u5e7e\u4e4e\u6240\u6709\u7684\u6771\u897f\u90fd\u662f\u7531 Object \u69cb\u6210\uff0c\u63a5\u4e0b\u4f86\u5c31\u7c21\u55ae\u4ecb\u7d39\u4e00\u4e0b Object \u901a\u7528\u7684 methods\u3002<\/p>\n\n\n\n<h3><span class=\"ez-toc-section\" id=\"21_class\"><\/span>2.1 .class<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u53ef\u4ee5\u7528 .class \u4f86\u5b58\u53d6\u8a72 object \u662f\u7531\u54ea\u500b class new \u51fa\u4f86\u7684\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"ruby\" class=\"language-ruby\">str = \"Hello\"\np str.class\n# String\n\nint = 10\np int.class\n# Integer\n\nfloat = 3.14\np float.class\n# Float\n\np true.class\n# TrueClass\n\np false.class\n# FalseClass\n\np nil.class\n# NilClass\n\nrange = 1..10\np range.class\n# Range\n\narr = [1, 2, 3]\np arr.class\n# Array\n\nhash = {\"name\" =&gt; \"Jimmy\"}\np hash.class\n# Hash\n\nsymbol = :name\np symbol.class\n# Symbol<\/code><\/pre>\n\n\n\n<h3><span class=\"ez-toc-section\" id=\"22_superclass\"><\/span>2.2 .superclass<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u53ef\u4ee5\u7528 superclass \u5b58\u53d6\u76ee\u524d class \u662f\u7531\u54ea\u500b class \u7e7c\u627f\u4e0b\u4f86\u7684\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"ruby\" class=\"language-ruby\">p 5.class\n# Integer\np 5.class.superclass\n# Numeric\np 5.class.superclass.superclass\n# Object\np 5.class.superclass.superclass.superclass\n# BasicObject\np 5.class.superclass.superclass.superclass.superclass\n# nil<\/code><\/pre>\n\n\n\n<h3><span class=\"ez-toc-section\" id=\"23_methods\"><\/span>2.3 .methods<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>.methods \u6703\u5217\u51fa\u76ee\u524d\u9019\u500b object \u5b58\u5728\u7684\u6240\u6709 methods<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"ruby\" class=\"language-ruby\">puts 5.methods\n# \u5217\u51fa\u5b58\u5728 Integer \u7684\u6240\u6709 methods<\/code><\/pre>\n\n\n\n<h2><span class=\"ez-toc-section\" id=\"3_%E5%8F%83%E8%80%83%E8%B3%87%E6%96%99\"><\/span>3. \u53c3\u8003\u8cc7\u6599<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><a href=\"https:\/\/www.udemy.com\/course\/learn-to-code-with-ruby-lang\/\" target=\"_blank\" rel=\"noreferrer noopener\">Learn to Code with Ruby<\/a><\/p>\n\n\n\n\n\n<p>\u5982\u679c\u89ba\u5f97\u6211\u7684\u6587\u7ae0\u6709\u5e6b\u52a9\u7684\u8a71\uff0c\u6b61\u8fce\u5e6b\u6211\u7684\u7c89\u5c08\u6309\u8b9a\u54e6~\u8b1d\u8b1d\u4f60\uff01<br><\/p>\n\n<iframe loading=\"lazy\" src=\"https:\/\/www.facebook.com\/plugins\/page.php?href=https%3A%2F%2Fwww.facebook.com%2Fjimmyswebnote&amp;tabs=timeline&amp;width=340&amp;height=500&amp;small_header=false&amp;adapt_container_width=true&amp;hide_cover=false&amp;show_facepile=true&amp;appId\" width=\"340\" height=\"500\" style=\"border:none;overflow:hidden\" scrolling=\"no\" frameborder=\"0\" allowfullscreen=\"true\" allow=\"autoplay; clipboard-write; encrypted-media; picture-in-picture; web-share\"><\/iframe>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>methods \u985e\u4f3c JavaScript \u7684 function\uff0cdef \u958b\u982d\uff0cend \u7d50\u5c3e\uff1a<\/p>\n","protected":false},"author":1,"featured_media":2620,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[184,90],"tags":[190,191],"_links":{"self":[{"href":"https:\/\/jimmyswebnote.com\/wp-json\/wp\/v2\/posts\/2617"}],"collection":[{"href":"https:\/\/jimmyswebnote.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jimmyswebnote.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jimmyswebnote.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jimmyswebnote.com\/wp-json\/wp\/v2\/comments?post=2617"}],"version-history":[{"count":3,"href":"https:\/\/jimmyswebnote.com\/wp-json\/wp\/v2\/posts\/2617\/revisions"}],"predecessor-version":[{"id":2625,"href":"https:\/\/jimmyswebnote.com\/wp-json\/wp\/v2\/posts\/2617\/revisions\/2625"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/jimmyswebnote.com\/wp-json\/wp\/v2\/media\/2620"}],"wp:attachment":[{"href":"https:\/\/jimmyswebnote.com\/wp-json\/wp\/v2\/media?parent=2617"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jimmyswebnote.com\/wp-json\/wp\/v2\/categories?post=2617"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jimmyswebnote.com\/wp-json\/wp\/v2\/tags?post=2617"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}