{"id":5426,"date":"2023-01-05T12:39:28","date_gmt":"2023-01-05T04:39:28","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=5426"},"modified":"2023-01-05T12:39:28","modified_gmt":"2023-01-05T04:39:28","slug":"%e4%ba%86%e8%a7%a3typescript%e4%b8%ad%e5%ad%97%e4%b8%b2%e6%b1%82%e5%b0%8f%e5%af%ab%e5%ad%97%e6%af%8d%e9%96%8b%e9%a0%ad%e5%ad%97%e7%ac%a6%e4%b8%b2%e7%9a%84islowercasefirst%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/typescript\/%e4%ba%86%e8%a7%a3typescript%e4%b8%ad%e5%ad%97%e4%b8%b2%e6%b1%82%e5%b0%8f%e5%af%ab%e5%ad%97%e6%af%8d%e9%96%8b%e9%a0%ad%e5%ad%97%e7%ac%a6%e4%b8%b2%e7%9a%84islowercasefirst%e6%96%b9%e6%b3%95\/","title":{"rendered":"\u4e86\u89e3TypeScript\u4e2d\u5b57\u4e32\u6c42\u5c0f\u5beb\u5b57\u6bcd\u958b\u982d\u5b57\u7b26\u4e32\u7684isLowerCaseFirst\u65b9\u6cd5"},"content":{"rendered":"<p><meta name=\"keywords\" content=\"TypeScript, \u5b57\u4e32, \u6c42\u662f\u5426\u70ba\u5c0f\u5beb\u5b57\u6bcd\u958b\u982d\u5b57\u7b26\u4e32, isLowerCaseFirst\"><\/p>\n<p>TypeScript \u662f\u4e00\u7a2e JavaScript \u7684\u8d85\u96c6\uff0c\u5b83\u64c1\u6709\u66f4\u591a\u7684\u529f\u80fd\uff0c\u5176\u4e2d\u4e00\u500b\u529f\u80fd\u5c31\u662f\u53ef\u4ee5\u6aa2\u67e5\u5b57\u4e32\u662f\u5426\u70ba\u5c0f\u5beb\u5b57\u6bcd\u958b\u982d\u5b57\u7b26\u4e32\u3002TypeScript \u63d0\u4f9b\u4e86\u4e00\u500b\u540d\u70ba isLowerCaseFirst \u7684\u51fd\u5f0f\uff0c\u53ef\u4ee5\u7528\u4f86\u6aa2\u67e5\u5b57\u4e32\u662f\u5426\u70ba\u5c0f\u5beb\u5b57\u6bcd\u958b\u982d\u5b57\u7b26\u4e32\u3002<\/p>\n<p><!--more--><\/p>\n<p>isLowerCaseFirst \u51fd\u5f0f\u63a5\u53d7\u4e00\u500b\u5b57\u4e32\u53c3\u6578\uff0c\u4e26\u8fd4\u56de\u4e00\u500b\u5e03\u6797\u503c\uff0c\u8868\u793a\u8a72\u5b57\u4e32\u662f\u5426\u70ba\u5c0f\u5beb\u5b57\u6bcd\u958b\u982d\u5b57\u7b26\u4e32\u3002\u5982\u679c\u662f\uff0c\u5247\u8fd4\u56de true\uff0c\u5426\u5247\u8fd4\u56de false\u3002<\/p>\n<pre class=\"brush: typescript\">\nfunction isLowerCaseFirst(str: string): boolean {\n  return str[0] === str[0].toLowerCase();\n}\n<\/pre>\n<p>\u4e0a\u9762\u7684\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u6211\u5011\u4f7f\u7528\u4e86 TypeScript \u7684\u5b57\u4e32\u65b9\u6cd5 str[0] \u4f86\u53d6\u5f97\u5b57\u4e32\u7684\u7b2c\u4e00\u500b\u5b57\u5143\uff0c\u4e26\u4f7f\u7528 str[0].toLowerCase() \u4f86\u5c07\u5176\u8f49\u63db\u70ba\u5c0f\u5beb\u5b57\u6bcd\uff0c\u6700\u5f8c\u518d\u6bd4\u8f03\u5169\u8005\u662f\u5426\u76f8\u7b49\uff0c\u4ee5\u5224\u65b7\u5b57\u4e32\u662f\u5426\u70ba\u5c0f\u5beb\u5b57\u6bcd\u958b\u982d\u5b57\u7b26\u4e32\u3002<\/p>\n<h2>\u4f7f\u7528 isLowerCaseFirst \u51fd\u5f0f<\/h2>\n<p>\u73fe\u5728\u6211\u5011\u4f86\u770b\u770b\u5982\u4f55\u4f7f\u7528 isLowerCaseFirst \u51fd\u5f0f\uff0c\u4e0b\u9762\u7684\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u6211\u5011\u5c07\u4e00\u500b\u5b57\u4e32\u50b3\u5165 isLowerCaseFirst \u51fd\u5f0f\uff0c\u4e26\u5c07\u8fd4\u56de\u503c\u8ce6\u503c\u7d66\u4e00\u500b\u5e03\u6797\u8b8a\u6578 isLowerCase\uff1a<\/p>\n<pre class=\"brush: typescript\">\nlet str = 'Hello World';\nlet isLowerCase = isLowerCaseFirst(str);\nconsole.log(isLowerCase); \/\/ false\n<\/pre>\n<p>\u4e0a\u9762\u7684\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u6211\u5011\u50b3\u5165\u7684\u5b57\u4e32\u662f &#8216;Hello World&#8217;\uff0c\u56e0\u70ba\u5b83\u7684\u7b2c\u4e00\u500b\u5b57\u5143\u662f\u5927\u5beb\u5b57\u6bcd\uff0c\u6240\u4ee5 isLowerCaseFirst \u51fd\u5f0f\u6703\u8fd4\u56de false\uff0c\u4e26\u5c07 false \u8ce6\u503c\u7d66 isLowerCase \u8b8a\u6578\u3002<\/p>\n<h2>\u7e3d\u7d50<\/h2>\n<p>\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u4ecb\u7d39\u4e86 TypeScript \u4e2d\u7684 isLowerCaseFirst \u51fd\u5f0f\uff0c\u5b83\u53ef\u4ee5\u7528\u4f86\u6aa2\u67e5\u5b57\u4e32\u662f\u5426\u70ba\u5c0f\u5beb\u5b57\u6bcd\u958b\u982d\u5b57\u7b26\u4e32\u3002\u6211\u5011\u4e5f\u770b\u5230\u4e86\u5982\u4f55\u4f7f\u7528 isLowerCaseFirst \u51fd\u5f0f\uff0c\u4e26\u5c07\u8fd4\u56de\u503c\u8ce6\u503c\u7d66\u4e00\u500b\u5e03\u6797\u8b8a\u6578\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3TypeScript\u4e2d\u5b57\u4e32\u6c42\u5c0f\u5beb\u5b57\u6bcd\u958b\u982d\u5b57\u7b26\u4e32\u7684isLowerCaseFirst\u65b9\u6cd5\uff0c\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528TypeScript\u4e2d\u7684isLowerCaseFirst\u65b9\u6cd5\u4f86\u6aa2\u67e5\u5b57\u4e32\u662f\u5426\u4ee5\u5c0f\u5beb\u5b57\u6bcd\u958b\u982d\uff0c\u4ee5\u53ca\u5982\u4f55\u4f7f\u7528\u5b83\u4f86\u6539\u5584\u7a0b\u5f0f\u78bc\u7684\u53ef\u8b80\u6027\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-5426","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\/pcFK27-1pw","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5426","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=5426"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5426\/revisions"}],"predecessor-version":[{"id":5427,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5426\/revisions\/5427"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=5426"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=5426"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=5426"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}