{"id":5090,"date":"2023-01-05T11:54:07","date_gmt":"2023-01-05T03:54:07","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=5090"},"modified":"2023-01-05T11:54:07","modified_gmt":"2023-01-05T03:54:07","slug":"%e5%ad%b8%e7%bf%92%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8typescript%e4%b8%ad%e7%9a%84%e6%95%b8%e7%b5%84%e6%98%a0%e5%b0%84%e5%8a%9f%e8%83%bd","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%e4%b8%ad%e7%9a%84%e6%95%b8%e7%b5%84%e6%98%a0%e5%b0%84%e5%8a%9f%e8%83%bd\/","title":{"rendered":"\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528TypeScript\u4e2d\u7684\u6578\u7d44\u6620\u5c04\u529f\u80fd"},"content":{"rendered":"<p><meta name=\"keywords\" content=\"TypeScript, \u6578\u7d44\u7684\u6620\u5c04, Array Mapping\"><\/p>\n<h1>TypeScript \u6578\u7d44\u7684\u6620\u5c04(Array Mapping)<\/h1>\n<p>TypeScript \u662f\u4e00\u7a2e JavaScript \u7684\u8d85\u96c6\uff0c\u5b83\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u985e\u578b\u7cfb\u7d71\uff0c\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u66f4\u5bb9\u6613\u5730\u958b\u767c\u51fa\u53ef\u9760\u7684\u7a0b\u5f0f\u78bc\u3002\u5728 TypeScript \u4e2d\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u4f7f\u7528\u6578\u7d44\u7684\u6620\u5c04\uff08Array Mapping\uff09\u4f86\u5c0d\u6578\u7d44\u4e2d\u7684\u5143\u7d20\u9032\u884c\u64cd\u4f5c\uff0c\u4e26\u5c07\u7d50\u679c\u5b58\u5132\u5728\u65b0\u7684\u6578\u7d44\u4e2d\u3002<\/p>\n<h2>\u4ec0\u9ebc\u662f\u6578\u7d44\u7684\u6620\u5c04\uff1f<\/h2>\n<p>\u6578\u7d44\u7684\u6620\u5c04\uff08Array Mapping\uff09\u662f\u4e00\u7a2e\u5c0d\u6578\u7d44\u4e2d\u7684\u5143\u7d20\u9032\u884c\u64cd\u4f5c\u7684\u65b9\u6cd5\uff0c\u5b83\u53ef\u4ee5\u5c07\u4e00\u500b\u6578\u7d44\u4e2d\u7684\u5143\u7d20\u6620\u5c04\u5230\u53e6\u4e00\u500b\u6578\u7d44\u4e2d\uff0c\u4e26\u5c07\u7d50\u679c\u5b58\u5132\u5728\u65b0\u7684\u6578\u7d44\u4e2d\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u6578\u7d44\uff0c\u5176\u4e2d\u5305\u542b\u4e86\u4e00\u4e9b\u6578\u5b57\uff1a<\/p>\n<pre class=\"brush: javascript\">\nlet numbers = [1, 2, 3, 4, 5];\n<\/pre>\n<p>\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u6578\u7d44\u7684\u6620\u5c04\uff08Array Mapping\uff09\u4f86\u5c0d\u9019\u500b\u6578\u7d44\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u4e58\u4ee5 2\uff0c\u4e26\u5c07\u7d50\u679c\u5b58\u5132\u5728\u65b0\u7684\u6578\u7d44\u4e2d\uff1a<\/p>\n<pre class=\"brush: javascript\">\nlet doubledNumbers = numbers.map(number => number * 2);\n\nconsole.log(doubledNumbers); \/\/ [2, 4, 6, 8, 10]\n<\/pre>\n<p>\u4e0a\u9762\u7684\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u6211\u5011\u4f7f\u7528\u4e86 <code>map()<\/code> \u65b9\u6cd5\u5c0d <code>numbers<\/code> \u6578\u7d44\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u4e58\u4ee5 2\uff0c\u4e26\u5c07\u7d50\u679c\u5b58\u5132\u5728 <code>doubledNumbers<\/code> \u6578\u7d44\u4e2d\u3002<\/p>\n<h2>\u4f7f\u7528 TypeScript \u4e2d\u7684\u6578\u7d44\u6620\u5c04<\/h2>\n<p>\u5728 TypeScript \u4e2d\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 <code>map()<\/code> \u65b9\u6cd5\u5c0d\u6578\u7d44\u4e2d\u7684\u5143\u7d20\u9032\u884c\u64cd\u4f5c\uff0c\u4e26\u5c07\u7d50\u679c\u5b58\u5132\u5728\u65b0\u7684\u6578\u7d44\u4e2d\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u6578\u7d44\uff0c\u5176\u4e2d\u5305\u542b\u4e86\u4e00\u4e9b\u5b57\u7b26\u4e32\uff1a<\/p>\n<pre class=\"brush: javascript\">\nlet strings = [\"foo\", \"bar\", \"baz\"];\n<\/pre>\n<p>\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 <code>map()<\/code> \u65b9\u6cd5\u5c0d <code>strings<\/code> \u6578\u7d44\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u9032\u884c\u8655\u7406\uff0c\u4e26\u5c07\u7d50\u679c\u5b58\u5132\u5728\u65b0\u7684\u6578\u7d44\u4e2d\uff1a<\/p>\n<pre class=\"brush: javascript\">\nlet lengths = strings.map(string => string.length);\n\nconsole.log(lengths); \/\/ [3, 3, 3]\n<\/pre>\n<p>\u4e0a\u9762\u7684\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u6211\u5011\u4f7f\u7528\u4e86 <code>map()<\/code> \u65b9\u6cd5\u5c0d <code>strings<\/code> \u6578\u7d44\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u8a08\u7b97\u5176\u9577\u5ea6\uff0c\u4e26\u5c07\u7d50\u679c\u5b58\u5132\u5728 <code>lengths<\/code> \u6578\u7d44\u4e2d\u3002<\/p>\n<h2>\u7e3d\u7d50<\/h2>\n<p>\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u5b78\u7fd2\u4e86 TypeScript \u4e2d\u7684\u6578\u7d44\u6620\u5c04\uff08Array Mapping\uff09\uff0c\u5b83\u53ef\u4ee5\u8b93\u6211\u5011\u5c0d\u6578\u7d44\u4e2d\u7684\u5143\u7d20\u9032\u884c\u64cd\u4f5c\uff0c\u4e26\u5c07\u7d50\u679c\u5b58\u5132\u5728\u65b0\u7684\u6578\u7d44\u4e2d\u3002\u6211\u5011\u4e5f\u5b78\u7fd2\u4e86\u5982\u4f55\u4f7f\u7528 <code>map()<\/code> \u65b9\u6cd5\u5c0d\u6578\u7d44\u4e2d\u7684\u5143\u7d20\u9032\u884c\u64cd\u4f5c\uff0c\u4e26\u5c07\u7d50\u679c\u5b58\u5132\u5728\u65b0\u7684\u6578\u7d44\u4e2d\u3002<\/p>\n<p><!--more--><\/p>\n<p>TypeScript \u7684\u6578\u7d44\u6620\u5c04\uff08Array Mapping\uff09\u529f\u80fd\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u66f4\u5bb9\u6613\u5730\u5c0d\u6578\u7d44\u4e2d\u7684\u5143\u7d20\u9032\u884c\u64cd\u4f5c\uff0c\u4e26\u5c07\u7d50\u679c\u5b58\u5132\u5728\u65b0\u7684\u6578\u7d44\u4e2d\u3002\u5b83\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u66f4\u5bb9\u6613\u5730\u5be6\u73fe\u8907\u96dc\u7684\u64cd\u4f5c\uff0c\u4e26\u6e1b\u5c11\u7a0b\u5f0f\u78bc\u7684\u91cd\u8907\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6458\u8981\uff1aTypeScript\u4e2d\u7684\u6578\u7d44\u6620\u5c04\u529f\u80fd\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u5c0d\u6578\u7d44\u4e2d\u7684\u5143\u7d20\u9032\u884c\u8655\u7406\uff0c\u4e26\u5c07\u8655\u7406\u7d50\u679c\u8fd4\u56de\u7d66\u958b\u767c\u8005\uff0c\u8b93\u958b\u767c\u8005\u53ef\u4ee5\u66f4\u8f15\u9b06\u5730\u64cd\u4f5c\u6578\u7d44\u4e2d\u7684\u5143\u7d20\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528TypeScript\u4e2d\u7684\u6578\u7d44\u6620\u5c04\u529f\u80fd\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-5090","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\/pcFK27-1k6","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5090","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=5090"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5090\/revisions"}],"predecessor-version":[{"id":5091,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5090\/revisions\/5091"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=5090"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=5090"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=5090"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}