{"id":5066,"date":"2023-01-05T11:48:32","date_gmt":"2023-01-05T03:48:32","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=5066"},"modified":"2023-01-05T11:48:32","modified_gmt":"2023-01-05T03:48:32","slug":"%e5%ad%b8%e7%bf%92%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8typescript%e5%ad%97%e4%b8%b2%e7%9a%84%e5%ad%97%e7%af%80%e9%95%b7%e5%ba%a6","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/typescript\/%e5%ad%b8%e7%bf%92%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8typescript%e5%ad%97%e4%b8%b2%e7%9a%84%e5%ad%97%e7%af%80%e9%95%b7%e5%ba%a6\/","title":{"rendered":"\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528TypeScript\u5b57\u4e32\u7684\u5b57\u7bc0\u9577\u5ea6"},"content":{"rendered":"<p><meta name=\"keywords\" content=\"TypeScript, \u5b57\u4e32, \u5b57\u7bc0\u9577\u5ea6, byteLength\"><\/p>\n<h1>TypeScript \u5b57\u4e32\u7684\u5b57\u7bc0\u9577\u5ea6(byteLength)<\/h1>\n<p>TypeScript \u662f\u4e00\u7a2e JavaScript \u7684\u8d85\u96c6\uff0c\u5b83\u63d0\u4f9b\u4e86\u66f4\u591a\u7684\u529f\u80fd\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f\u652f\u63f4\u5b57\u4e32\u7684\u5b57\u7bc0\u9577\u5ea6(byteLength)\u3002\u5b57\u7bc0\u9577\u5ea6(byteLength)\u662f\u6307\u5b57\u4e32\u7684\u5b57\u7bc0\u6578\uff0c\u5b83\u53ef\u4ee5\u7528\u4f86\u6aa2\u67e5\u5b57\u4e32\u7684\u9577\u5ea6\uff0c\u4ee5\u53ca\u6aa2\u67e5\u5b57\u4e32\u662f\u5426\u8d85\u51fa\u6307\u5b9a\u7684\u9577\u5ea6\u9650\u5236\u3002<\/p>\n<p><!--more--><\/p>\n<p>\u5728 TypeScript \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 <span style=\"font-weight: bold;\">String.prototype.byteLength<\/span> \u4f86\u53d6\u5f97\u5b57\u4e32\u7684\u5b57\u7bc0\u9577\u5ea6\u3002\u5b83\u6703\u56de\u50b3\u4e00\u500b\u6578\u5b57\uff0c\u4ee3\u8868\u5b57\u4e32\u7684\u5b57\u7bc0\u6578\u3002\u4f8b\u5982\uff1a<\/p>\n<pre class=\"brush: typescript\">\nlet str = 'Hello World';\nlet byteLength = str.byteLength;\nconsole.log(byteLength); \/\/ 11\n<\/pre>\n<p>\u53e6\u5916\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528 <span style=\"font-weight: bold;\">String.prototype.length<\/span> \u4f86\u53d6\u5f97\u5b57\u4e32\u7684\u5b57\u5143\u9577\u5ea6\uff0c\u5b83\u6703\u56de\u50b3\u4e00\u500b\u6578\u5b57\uff0c\u4ee3\u8868\u5b57\u4e32\u7684\u5b57\u5143\u6578\u3002\u4f8b\u5982\uff1a<\/p>\n<pre class=\"brush: typescript\">\nlet str = 'Hello World';\nlet length = str.length;\nconsole.log(length); \/\/ 11\n<\/pre>\n<p>\u53ef\u4ee5\u770b\u5230\uff0c\u5728\u4e0a\u9762\u7684\u7bc4\u4f8b\u4e2d\uff0c\u5b57\u4e32\u7684\u5b57\u7bc0\u9577\u5ea6(byteLength)\u8207\u5b57\u5143\u9577\u5ea6(length)\u662f\u4e00\u6a23\u7684\uff0c\u9019\u662f\u56e0\u70ba\u5b57\u4e32\u4e2d\u7684\u6bcf\u500b\u5b57\u5143\u90fd\u662f\u4e00\u500b\u5b57\u7bc0\u3002<\/p>\n<p>\u4e0d\u904e\uff0c\u7576\u5b57\u4e32\u4e2d\u6709\u975e ASCII \u5b57\u5143\u6642\uff0c\u5b57\u7bc0\u9577\u5ea6(byteLength)\u5c31\u6703\u6bd4\u5b57\u5143\u9577\u5ea6(length)\u5927\uff0c\u56e0\u70ba\u975e ASCII \u5b57\u5143\u6703\u4f54\u7528\u5169\u500b\u5b57\u7bc0\u3002\u4f8b\u5982\uff1a<\/p>\n<pre class=\"brush: typescript\">\nlet str = '\u4f60\u597d\u4e16\u754c';\nlet byteLength = str.byteLength;\nlet length = str.length;\nconsole.log(byteLength); \/\/ 12\nconsole.log(length); \/\/ 4\n<\/pre>\n<p>\u53ef\u4ee5\u770b\u5230\uff0c\u5b57\u4e32\u7684\u5b57\u7bc0\u9577\u5ea6(byteLength)\u662f 12\uff0c\u800c\u5b57\u5143\u9577\u5ea6(length)\u662f 4\uff0c\u9019\u662f\u56e0\u70ba\u5b57\u4e32\u4e2d\u7684\u6bcf\u500b\u4e2d\u6587\u5b57\u90fd\u662f\u5169\u500b\u5b57\u7bc0\u3002<\/p>\n<p>\u56e0\u6b64\uff0c\u5982\u679c\u8981\u6aa2\u67e5\u5b57\u4e32\u662f\u5426\u8d85\u51fa\u6307\u5b9a\u7684\u9577\u5ea6\u9650\u5236\uff0c\u5c31\u5fc5\u9808\u4f7f\u7528\u5b57\u7bc0\u9577\u5ea6(byteLength)\u4f86\u6aa2\u67e5\uff0c\u800c\u4e0d\u662f\u5b57\u5143\u9577\u5ea6(length)\u3002\u4f8b\u5982\uff1a<\/p>\n<pre class=\"brush: typescript\">\nlet str = '\u4f60\u597d\u4e16\u754c';\nlet maxLength = 10;\nif (str.byteLength > maxLength) {\n  console.log('\u5b57\u4e32\u8d85\u51fa\u9577\u5ea6\u9650\u5236');\n}\n<\/pre>\n<p>\u7e3d\u7d50\uff0cTypeScript \u63d0\u4f9b\u4e86 <span style=\"font-weight: bold;\">String.prototype.byteLength<\/span> \u4f86\u53d6\u5f97\u5b57\u4e32\u7684\u5b57\u7bc0\u9577\u5ea6\uff0c\u5b83\u53ef\u4ee5\u7528\u4f86\u6aa2\u67e5\u5b57\u4e32\u7684\u9577\u5ea6\uff0c\u4ee5\u53ca\u6aa2\u67e5\u5b57\u4e32\u662f\u5426\u8d85\u51fa\u6307\u5b9a\u7684\u9577\u5ea6\u9650\u5236\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6458\u8981\uff1aTypeScript\u5b57\u4e32\u7684\u5b57\u7bc0\u9577\u5ea6\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u7ba1\u7406\u548c\u64cd\u4f5c\u5b57\u4e32\uff0c\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528TypeScript\u5b57\u4e32\u7684\u5b57\u7bc0\u9577\u5ea6\uff0c\u4ee5\u53ca\u5b83\u7684\u512a\u9ede\u548c\u7f3a\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-5066","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\/pcFK27-1jI","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5066","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=5066"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5066\/revisions"}],"predecessor-version":[{"id":5067,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5066\/revisions\/5067"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=5066"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=5066"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=5066"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}