{"id":510,"date":"2022-12-24T22:04:18","date_gmt":"2022-12-24T13:04:18","guid":{"rendered":"http:\/\/attacktube.com\/?p=510"},"modified":"2022-12-25T10:14:23","modified_gmt":"2022-12-25T01:14:23","slug":"javascript-%e7%9c%9f%e5%80%a4truthy%e3%81%a8%e5%81%bd%e5%80%a4-falsy%e3%81%be%e3%81%9f%e3%81%affalsey","status":"publish","type":"post","link":"https:\/\/attacktube.com\/?p=510","title":{"rendered":"JavaScript \u771f\u5024(truthy)\u3068\u507d\u5024 (falsy\u307e\u305f\u306ffalsey)"},"content":{"rendered":"\n<p>&#8211;MDN\u3088\u308a \u3053\u3053\u304b\u3089&#8211;<br>JavaScript \u306b\u304a\u3044\u3066\u3001\u771f\u5024 (truthy) \u306f\u8ad6\u7406\u5024\u306e\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306b\u73fe\u308c\u305f\u6642\u306b true \u3068\u307f\u306a\u3055\u308c\u308b\u5024\u306e\u3053\u3068\u3067\u3059\u3002\u507d\u5024 (falsy) \u3068\u3057\u3066\u5b9a\u7fa9\u3055\u308c\u305f\u5024 (\u3064\u307e\u308a\u3001false, 0, -0, 0n, &#8220;&#8221;, null, undefined, NaN) \u3092\u9664\u304f\u3059\u3079\u3066\u306e\u5024\u306f\u771f\u5024\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u507d\u5024 (falsy \u307e\u305f\u306f falsey \u306a\u5024) \u306f\u3001 Boolean \u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306b\u73fe\u308c\u305f\u3068\u304d\u306b\u507d\u3068\u307f\u306a\u3055\u308c\u308b\u5024\u3067\u3059\u3002<br>&#8211;MDN\u3088\u308a\u3053\u3053\u307e\u3067&#8211;<\/p>\n\n\n\n<!--more-->\n\n\n\n<p>\u300cnull\u306ftruthy\u3067\u306f\u306a\u304ffalsy\u3067\u3042\u308b\u300d\u3068\u3044\u3046\u8a00\u8449\u306e\u4f7f\u3044\u65b9\u3092\u3059\u308b\u3002<br><br>\u771f\u5024 (truthy)<br><a href=\"https:\/\/developer.mozilla.org\/ja\/docs\/Glossary\/Truthy\">https:\/\/developer.mozilla.org\/ja\/docs\/Glossary\/Truthy<\/a><br>\u507d\u5024 (falsy\u307e\u305f\u306ffalsey\u306a\u5024)<br><a href=\"https:\/\/developer.mozilla.org\/ja\/docs\/Glossary\/Falsy\">https:\/\/developer.mozilla.org\/ja\/docs\/Glossary\/Falsy<\/a><\/p>\n\n\n\n<script type=\"text\/javascript\">\njQuery(function($){\n$(\".jp-video\").hide();\n});\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>&#8211;MDN\u3088\u308a \u3053\u3053\u304b\u3089&#8211;JavaScript \u306b\u304a\u3044\u3066\u3001\u771f\u5024 (truthy) \u306f\u8ad6\u7406\u5024\u306e\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306b\u73fe\u308c\u305f\u6642\u306b true \u3068\u307f\u306a\u3055\u308c\u308b\u5024\u306e\u3053\u3068\u3067\u3059\u3002\u507d\u5024 (falsy) \u3068\u3057\u3066\u5b9a\u7fa9\u3055\u308c\u305f\u5024 ( [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[3],"tags":[],"class_list":["post-510","post","type-post","status-publish","format-standard","hentry","category-javascript"],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/attacktube.com\/index.php?rest_route=\/wp\/v2\/posts\/510","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/attacktube.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/attacktube.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/attacktube.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/attacktube.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=510"}],"version-history":[{"count":5,"href":"https:\/\/attacktube.com\/index.php?rest_route=\/wp\/v2\/posts\/510\/revisions"}],"predecessor-version":[{"id":515,"href":"https:\/\/attacktube.com\/index.php?rest_route=\/wp\/v2\/posts\/510\/revisions\/515"}],"wp:attachment":[{"href":"https:\/\/attacktube.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=510"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/attacktube.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=510"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/attacktube.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=510"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}