{"id":5250,"date":"2023-01-05T12:17:42","date_gmt":"2023-01-05T04:17:42","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=5250"},"modified":"2023-01-05T12:17:42","modified_gmt":"2023-01-05T04:17:42","slug":"%e4%ba%86%e8%a7%a3typescript%e5%ad%97%e4%b8%b2%e7%9a%84%e6%b1%82%e6%98%af%e5%90%a6%e7%82%ba%e7%a9%ba%e5%ad%97%e7%ac%a6%e4%b8%b2isempty%e5%8a%9f%e8%83%bd","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/typescript\/%e4%ba%86%e8%a7%a3typescript%e5%ad%97%e4%b8%b2%e7%9a%84%e6%b1%82%e6%98%af%e5%90%a6%e7%82%ba%e7%a9%ba%e5%ad%97%e7%ac%a6%e4%b8%b2isempty%e5%8a%9f%e8%83%bd\/","title":{"rendered":"\u4e86\u89e3TypeScript\u5b57\u4e32\u7684\u6c42\u662f\u5426\u70ba\u7a7a\u5b57\u7b26\u4e32(isEmpty)\u529f\u80fd"},"content":{"rendered":"<p><meta name=\"keywords\" content=\"TypeScript,\u5b57\u4e32,\u6c42\u662f\u5426\u70ba\u7a7a\u5b57\u7b26\u4e32,isEmpty\"><\/p>\n<h1>\u4f7f\u7528 TypeScript \u5b57\u4e32\u7684\u6c42\u662f\u5426\u70ba\u7a7a\u5b57\u7b26\u4e32(isEmpty)<\/h1>\n<p>TypeScript \u662f\u4e00\u7a2e JavaScript \u7684\u8d85\u96c6\uff0c\u5b83\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u985e\u578b\u7cfb\u7d71\u548c\u975c\u614b\u6aa2\u67e5\u529f\u80fd\uff0c\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u8f15\u9b06\u5730\u958b\u767c\u51fa\u5065\u58ef\u7684\u61c9\u7528\u7a0b\u5f0f\u3002\u5728 TypeScript \u4e2d\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u4f7f\u7528 isEmpty \u51fd\u6578\u4f86\u6aa2\u67e5\u5b57\u4e32\u662f\u5426\u70ba\u7a7a\u5b57\u7b26\u4e32\u3002<\/p>\n<h2>isEmpty \u51fd\u6578\u7684\u4f7f\u7528<\/h2>\n<p>isEmpty \u51fd\u6578\u53ef\u4ee5\u7528\u4f86\u6aa2\u67e5\u5b57\u4e32\u662f\u5426\u70ba\u7a7a\u5b57\u7b26\u4e32\uff0c\u5b83\u6703\u56de\u50b3\u4e00\u500b\u5e03\u6797\u503c\uff0c\u5982\u679c\u5b57\u4e32\u70ba\u7a7a\uff0c\u5247\u56de\u50b3 true\uff0c\u53cd\u4e4b\u5247\u56de\u50b3 false\u3002<\/p>\n<pre class=\"brush: typescript\">\nfunction isEmpty(str: string): boolean {\n    return str.length === 0;\n}\n<\/pre>\n<h2>\u793a\u4f8b<\/h2>\n<p>\u4e0b\u9762\u662f\u4e00\u500b\u4f7f\u7528 isEmpty \u51fd\u6578\u7684\u793a\u4f8b\uff1a<\/p>\n<pre class=\"brush: typescript\">\nlet str1 = \"Hello World!\";\nlet str2 = \"\";\n\nconsole.log(isEmpty(str1)); \/\/ false\nconsole.log(isEmpty(str2)); \/\/ true\n<\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u5b9a\u7fa9\u4e86\u5169\u500b\u5b57\u4e32\uff0c\u4e00\u500b\u662f\u975e\u7a7a\u5b57\u4e32\uff0c\u53e6\u4e00\u500b\u662f\u7a7a\u5b57\u4e32\uff0c\u7136\u5f8c\u6211\u5011\u4f7f\u7528 isEmpty \u51fd\u6578\u4f86\u6aa2\u67e5\u5b83\u5011\u662f\u5426\u70ba\u7a7a\u5b57\u7b26\u4e32\uff0c\u7d50\u679c\u5982\u4e0a\u6240\u793a\u3002<\/p>\n<h2>\u7e3d\u7d50<\/h2>\n<p>\u5728 TypeScript \u4e2d\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u4f7f\u7528 isEmpty \u51fd\u6578\u4f86\u6aa2\u67e5\u5b57\u4e32\u662f\u5426\u70ba\u7a7a\u5b57\u7b26\u4e32\uff0c\u5b83\u6703\u56de\u50b3\u4e00\u500b\u5e03\u6797\u503c\uff0c\u5982\u679c\u5b57\u4e32\u70ba\u7a7a\uff0c\u5247\u56de\u50b3 true\uff0c\u53cd\u4e4b\u5247\u56de\u50b3 false\u3002\u9019\u662f\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u51fd\u6578\uff0c\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u8f15\u9b06\u5730\u6aa2\u67e5\u5b57\u4e32\u662f\u5426\u70ba\u7a7a\u5b57\u7b26\u4e32\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6458\u8981(Description):TypeScript\u63d0\u4f9b\u4e86\u4e00\u500bisEmpty()\u51fd\u6578\uff0c\u53ef\u4ee5\u7528\u4f86\u6aa2\u67e5\u5b57\u4e32\u662f\u5426\u70ba\u7a7a\u5b57\u7b26\u4e32\uff0c\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528isEmpty()\u51fd\u6578\uff0c\u4ee5\u53ca\u5b83\u7684\u529f\u80fd\u548c\u512a\u9ede\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[187],"tags":[186],"class_list":["post-5250","post","type-post","status-publish","format-standard","hentry","category-typescript","tag-typescript"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_shortlink":"https:\/\/wp.me\/pcFK27-1mG","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5250","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/comments?post=5250"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5250\/revisions"}],"predecessor-version":[{"id":5251,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5250\/revisions\/5251"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=5250"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=5250"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=5250"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}