{"id":403,"date":"2007-06-27T23:55:00","date_gmt":"2007-06-27T14:55:00","guid":{"rendered":"http:\/\/ecpplus.net\/weblog\/?p=403"},"modified":"2021-06-15T16:22:23","modified_gmt":"2021-06-15T07:22:23","slug":"blank-%e3%82%92%e4%bd%bf%e3%81%86","status":"publish","type":"post","link":"https:\/\/ecpplus.net\/weblog\/blank-%e3%82%92%e4%bd%bf%e3%81%86\/","title":{"rendered":"Rails \u3067 ActiveSupport \u306e #blank? \u3092\u4f7f\u3046"},"content":{"rendered":"<p>Rails \u3067\u306f <code>#blank?<\/code> \u3092\u3088\u304f\u4f7f\u3044\u307e\u3059\u304c\u3001\u6b63\u76f4\u3088\u304f\u5206\u304b\u3063\u3066\u307e\u305b\u3093\u3067\u3057\u305f\u3002String \u304c <code>&#039;&#039;<\/code> \u306a\u6642\u3068\u3001\u305f\u307e\u305f\u307e <code>nil<\/code> \u3060\u3063\u305f\u3068\u304d\u306b\u4e21\u65b9\u5224\u5b9a\u3057\u3066\u304f\u308c\u308b\u4fbf\u5229\u305d\u3046\u306a\u3082\u306e\u3002\u3063\u3066\u3044\u3046\u8a8d\u8b58\u3060\u3063\u305f\u3093\u3067\u3059\u304c\u3001\u30bd\u30fc\u30b9\u898b\u305f\u3089\u52c9\u5f37\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<a target=\"_blank\" href=\"https:\/\/github.com\/rails\/rails\/blob\/main\/activesupport\/lib\/active_support\/core_ext\/object\/blank.rb\" rel=\"noreferrer noopener\">blank.rb (GitHub)<\/a>\n<p><code>NilClass<\/code>, <code>FalseClass<\/code>, <code>TrueClass<\/code> \u7b49\u306b <code>blank?<\/code> \u30e1\u30bd\u30c3\u30c9\u3064\u3051\u3066\u308b\u3093\u3067\u3059\u306d\u3002\u3059\u3054\u3044\u3002<\/p>\n<p>\u3088\u304f\u3001Array\u30af\u30e9\u30b9\u3092 empty? \u3067\u8a55\u4fa1\u3057\u3088\u3046\u3068\u3057\u3066 nil \u3060\u3068 Exception \u306a\u3093\u3066\u3088\u304f\u3042\u308a\u307e\u3059\u304c\u3001\u3053\u308c\u3082 blank? \u3067OK\u3067\u3059\u3002\u30a8\u30e9\u30fc\u51fa\u306a\u3044\u3088\u3046\u306b nil \u30c1\u30a7\u30c3\u30af\u3057\u3066\u3044\u305f<\/p>\n<pre><code class=\"language-ruby\">if ary.nil? || ary.empty?<\/code><\/pre>\n<p>\u3068\u3044\u3046\u3088\u3046\u306a\u30b3\u30fc\u30c9\u306f\u4e0d\u8981\u3067<\/p>\n<pre><code>if ary.blank?<\/code><\/pre>\n<p>\u3067OK\u3067\u3059\u3002<\/p>\n<p><code>blank?<\/code> \u306e\u9006\u306f <code>present?<\/code> \u3067\u3059\u3002<\/p>\n<p>\u4fbf\u5229\u3067\u3059\u306d\ud83d\udc4d\ud83c\udffb<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Rails \u3067\u306f #blank? \u3092\u3088\u304f\u4f7f\u3044\u307e\u3059\u304c\u3001\u6b63\u76f4\u3088\u304f\u5206\u304b\u3063\u3066\u307e\u305b\u3093\u3067\u3057\u305f\u3002String \u304c &#039;&#039; \u306a\u6642\u3068\u3001\u305f\u307e\u305f\u307e nil \u3060\u3063\u305f\u3068\u304d\u306b\u4e21\u65b9\u5224\u5b9a\u3057\u3066\u304f\u308c\u308b\u4fbf\u5229\u305d\u3046\u306a\u3082\u306e\u3002\u3063\u3066\u3044\u3046\u8a8d\u8b58\u3060\u3063\u305f\u3093\u3067 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2521,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[43],"tags":[10],"class_list":["post-403","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-development","tag-rails"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/ecpplus.net\/weblog\/wp-json\/wp\/v2\/posts\/403","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ecpplus.net\/weblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ecpplus.net\/weblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ecpplus.net\/weblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ecpplus.net\/weblog\/wp-json\/wp\/v2\/comments?post=403"}],"version-history":[{"count":4,"href":"https:\/\/ecpplus.net\/weblog\/wp-json\/wp\/v2\/posts\/403\/revisions"}],"predecessor-version":[{"id":4071,"href":"https:\/\/ecpplus.net\/weblog\/wp-json\/wp\/v2\/posts\/403\/revisions\/4071"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ecpplus.net\/weblog\/wp-json\/wp\/v2\/media\/2521"}],"wp:attachment":[{"href":"https:\/\/ecpplus.net\/weblog\/wp-json\/wp\/v2\/media?parent=403"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ecpplus.net\/weblog\/wp-json\/wp\/v2\/categories?post=403"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ecpplus.net\/weblog\/wp-json\/wp\/v2\/tags?post=403"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}