{"id":5076,"date":"2023-01-05T11:50:46","date_gmt":"2023-01-05T03:50:46","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=5076"},"modified":"2023-01-05T11:50:46","modified_gmt":"2023-01-05T03:50:46","slug":"%e4%ba%86%e8%a7%a3typescript%e4%b8%ad%e6%95%b8%e7%b5%84%e7%9a%84%e9%a1%9e%e5%9e%8b%e6%96%b7%e8%a8%80","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/typescript\/%e4%ba%86%e8%a7%a3typescript%e4%b8%ad%e6%95%b8%e7%b5%84%e7%9a%84%e9%a1%9e%e5%9e%8b%e6%96%b7%e8%a8%80\/","title":{"rendered":"\u4e86\u89e3TypeScript\u4e2d\u6578\u7d44\u7684\u985e\u578b\u65b7\u8a00"},"content":{"rendered":"<p><meta name=\"keywords\" content=\"TypeScript, \u6578\u7d44\u7684\u985e\u578b\u65b7\u8a00, Array Type Assertions\"><\/p>\n<h1>TypeScript \u6578\u7d44\u7684\u985e\u578b\u65b7\u8a00(Array Type Assertions)<\/h1>\n<p>TypeScript \u662f\u4e00\u7a2e JavaScript \u7684\u8d85\u96c6\uff0c\u5b83\u63d0\u4f9b\u4e86\u985e\u578b\u7cfb\u7d71\uff0c\u53ef\u4ee5\u5728\u7de8\u8b6f\u6642\u671f\u6aa2\u67e5\u985e\u578b\uff0c\u4ee5\u78ba\u4fdd\u7a0b\u5f0f\u78bc\u7684\u6b63\u78ba\u6027\u3002\u5728 TypeScript \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u300c\u6578\u7d44\u7684\u985e\u578b\u65b7\u8a00(Array Type Assertions)\u300d\u4f86\u6307\u5b9a\u4e00\u500b\u6578\u7d44\u7684\u985e\u578b\uff0c\u4ee5\u78ba\u4fdd\u6578\u7d44\u4e2d\u7684\u5143\u7d20\u90fd\u662f\u6307\u5b9a\u7684\u985e\u578b\u3002<\/p>\n<p><!--more--><\/p>\n<p>\u6578\u7d44\u7684\u985e\u578b\u65b7\u8a00\u53ef\u4ee5\u4f7f\u7528\u300c<code>as<\/code>\u300d\u95dc\u9375\u5b57\u4f86\u5b9a\u7fa9\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre class=\"brush: typescript\">\nlet numbers: number[] = [1, 2, 3];\nlet numbersAsString: string[] = numbers as string[];\n<\/pre>\n<p>\u4e0a\u9762\u7684\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u6211\u5011\u5b9a\u7fa9\u4e86\u4e00\u500b <code>number[]<\/code> \u7684\u6578\u7d44\uff0c\u7136\u5f8c\u4f7f\u7528\u300c<code>as<\/code>\u300d\u95dc\u9375\u5b57\u5c07\u5b83\u65b7\u8a00\u70ba <code>string[]<\/code> \u7684\u6578\u7d44\uff0c\u9019\u6a23\u5c31\u53ef\u4ee5\u78ba\u4fdd\u6578\u7d44\u4e2d\u7684\u5143\u7d20\u90fd\u662f\u5b57\u4e32\u985e\u578b\u3002<\/p>\n<p>\u53e6\u5916\uff0c\u6211\u5011\u4e5f\u53ef\u4ee5\u4f7f\u7528\u300c<code>as<\/code>\u300d\u95dc\u9375\u5b57\u5c07\u4e00\u500b\u6578\u7d44\u65b7\u8a00\u70ba\u4e00\u500b\u66f4\u5177\u9ad4\u7684\u985e\u578b\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre class=\"brush: typescript\">\nlet numbers: (number | string)[] = [1, '2', 3];\nlet numbersAsNumber: number[] = numbers as number[];\n<\/pre>\n<p>\u4e0a\u9762\u7684\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u6211\u5011\u5b9a\u7fa9\u4e86\u4e00\u500b <code>(number | string)[]<\/code> \u7684\u6578\u7d44\uff0c\u7136\u5f8c\u4f7f\u7528\u300c<code>as<\/code>\u300d\u95dc\u9375\u5b57\u5c07\u5b83\u65b7\u8a00\u70ba <code>number[]<\/code> \u7684\u6578\u7d44\uff0c\u9019\u6a23\u5c31\u53ef\u4ee5\u78ba\u4fdd\u6578\u7d44\u4e2d\u7684\u5143\u7d20\u90fd\u662f\u6578\u5b57\u985e\u578b\u3002<\/p>\n<p>\u7e3d\u7d50\u4f86\u8aaa\uff0cTypeScript \u4e2d\u7684\u300c\u6578\u7d44\u7684\u985e\u578b\u65b7\u8a00(Array Type Assertions)\u300d\u53ef\u4ee5\u8b93\u6211\u5011\u6307\u5b9a\u4e00\u500b\u6578\u7d44\u7684\u985e\u578b\uff0c\u4ee5\u78ba\u4fdd\u6578\u7d44\u4e2d\u7684\u5143\u7d20\u90fd\u662f\u6307\u5b9a\u7684\u985e\u578b\uff0c\u9019\u6a23\u53ef\u4ee5\u63d0\u9ad8\u7a0b\u5f0f\u78bc\u7684\u53ef\u8b80\u6027\u548c\u53ef\u7dad\u8b77\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6458\u8981:\u4e86\u89e3TypeScript\u4e2d\u6578\u7d44\u7684\u985e\u578b\u65b7\u8a00\uff0c\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u66f4\u6709\u6548\u7387\u7684\u4f7f\u7528TypeScript\uff0c\u66f4\u5feb\u901f\u7684\u5b8c\u6210\u958b\u767c\u4efb\u52d9\uff0c\u63d0\u5347\u958b\u767c\u6548\u7387\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-5076","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\/pcFK27-1jS","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5076","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=5076"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5076\/revisions"}],"predecessor-version":[{"id":5077,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5076\/revisions\/5077"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=5076"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=5076"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=5076"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}