{"id":5202,"date":"2023-01-05T12:11:29","date_gmt":"2023-01-05T04:11:29","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=5202"},"modified":"2023-01-05T12:11:29","modified_gmt":"2023-01-05T04:11:29","slug":"%e4%ba%86%e8%a7%a3typescript%e4%b8%ad%e6%95%b8%e7%b5%84%e7%9a%84%e6%98%a0%e5%b0%84arraymap%e5%8a%9f%e8%83%bd","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%e6%98%a0%e5%b0%84arraymap%e5%8a%9f%e8%83%bd\/","title":{"rendered":"\u4e86\u89e3TypeScript\u4e2d\u6578\u7d44\u7684\u6620\u5c04(ArrayMap)\u529f\u80fd"},"content":{"rendered":"<p><meta name=\"keywords\" content=\"TypeScript, \u6578\u7d44\u7684\u6620\u5c04, Array Map\"><\/p>\n<h1>TypeScript \u6578\u7d44\u7684\u6620\u5c04(Array Map)<\/h1>\n<p>TypeScript \u662f\u4e00\u7a2e JavaScript \u7684\u8d85\u96c6\uff0c\u5b83\u64c1\u6709\u66f4\u591a\u7684\u529f\u80fd\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f\u6578\u7d44\u7684\u6620\u5c04(Array Map)\u3002\u6578\u7d44\u7684\u6620\u5c04\u662f\u4e00\u7a2e\u5c0d\u6578\u7d44\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u57f7\u884c\u6307\u5b9a\u64cd\u4f5c\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u66f4\u5bb9\u6613\u5730\u5c0d\u6578\u7d44\u4e2d\u7684\u5143\u7d20\u9032\u884c\u64cd\u4f5c\u3002<\/p>\n<h2>\u4ec0\u9ebc\u662f\u6578\u7d44\u7684\u6620\u5c04<\/h2>\n<p>\u6578\u7d44\u7684\u6620\u5c04\u662f\u4e00\u7a2e\u5c0d\u6578\u7d44\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u57f7\u884c\u6307\u5b9a\u64cd\u4f5c\u7684\u65b9\u6cd5\uff0c\u5b83\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u66f4\u5bb9\u6613\u5730\u5c0d\u6578\u7d44\u4e2d\u7684\u5143\u7d20\u9032\u884c\u64cd\u4f5c\u3002\u5b83\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"language-javascript line-numbers\">array.map(callback(currentValue, index, array))\n<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c<code>callback<\/code> \u662f\u4e00\u500b\u51fd\u6578\uff0c\u5b83\u6703\u5c0d\u6578\u7d44\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u57f7\u884c\u6307\u5b9a\u7684\u64cd\u4f5c\uff0c\u4e26\u8fd4\u56de\u4e00\u500b\u65b0\u7684\u6578\u7d44\u3002<\/p>\n<h2>\u4f7f\u7528\u6578\u7d44\u7684\u6620\u5c04<\/h2>\n<p>\u4f7f\u7528\u6578\u7d44\u7684\u6620\u5c04\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u66f4\u5bb9\u6613\u5730\u5c0d\u6578\u7d44\u4e2d\u7684\u5143\u7d20\u9032\u884c\u64cd\u4f5c\uff0c\u4e0b\u9762\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff1a<\/p>\n<pre class=\"brush: javascript\">\nlet numbers = [1, 2, 3, 4, 5];\n\nlet newNumbers = numbers.map(function(number) {\n  return number * 2;\n});\n\nconsole.log(newNumbers); \/\/ [2, 4, 6, 8, 10]\n<\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u4f7f\u7528\u4e86 <code>map()<\/code> \u65b9\u6cd5\u5c0d\u6578\u7d44\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u57f7\u884c\u4e86\u4e58\u4ee5 2 \u7684\u64cd\u4f5c\uff0c\u6700\u5f8c\u5f97\u5230\u4e86\u4e00\u500b\u65b0\u7684\u6578\u7d44 <code>newNumbers<\/code>\u3002<\/p>\n<p><!--more--><\/p>\n<h2>\u6578\u7d44\u7684\u6620\u5c04\u7684\u512a\u9ede<\/h2>\n<p>\u6578\u7d44\u7684\u6620\u5c04\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u66f4\u5bb9\u6613\u5730\u5c0d\u6578\u7d44\u4e2d\u7684\u5143\u7d20\u9032\u884c\u64cd\u4f5c\uff0c\u4e26\u4e14\u5b83\u7684\u57f7\u884c\u6548\u7387\u4e5f\u6bd4\u50b3\u7d71\u7684 <code>for<\/code> \u5faa\u74b0\u9ad8\u5f97\u591a\uff0c\u56e0\u6b64\u5b83\u662f\u4e00\u7a2e\u975e\u5e38\u6709\u6548\u7387\u7684\u65b9\u6cd5\u3002<\/p>\n<p>\u6b64\u5916\uff0c\u6578\u7d44\u7684\u6620\u5c04\u4e5f\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u66f4\u5bb9\u6613\u5730\u5c0d\u6578\u7d44\u4e2d\u7684\u5143\u7d20\u9032\u884c\u64cd\u4f5c\uff0c\u56e0\u70ba\u5b83\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u5c07\u64cd\u4f5c\u5c01\u88dd\u5728\u4e00\u500b\u51fd\u6578\u4e2d\uff0c\u800c\u4e0d\u9700\u8981\u5c0d\u6bcf\u500b\u5143\u7d20\u9032\u884c\u55ae\u7368\u7684\u64cd\u4f5c\u3002<\/p>\n<h2>\u7e3d\u7d50<\/h2>\n<p>\u6578\u7d44\u7684\u6620\u5c04\u662f TypeScript \u4e2d\u4e00\u7a2e\u975e\u5e38\u6709\u6548\u7387\u7684\u65b9\u6cd5\uff0c\u5b83\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u66f4\u5bb9\u6613\u5730\u5c0d\u6578\u7d44\u4e2d\u7684\u5143\u7d20\u9032\u884c\u64cd\u4f5c\uff0c\u4e26\u4e14\u5b83\u7684\u57f7\u884c\u6548\u7387\u4e5f\u6bd4\u50b3\u7d71\u7684 <code>for<\/code> \u5faa\u74b0\u9ad8\u5f97\u591a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>TypeScript\u4e2d\u7684\u6578\u7d44\u6620\u5c04(ArrayMap)\u529f\u80fd\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u5c0d\u6578\u7d44\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u57f7\u884c\u6307\u5b9a\u7684\u64cd\u4f5c\uff0c\u4e26\u8fd4\u56de\u4e00\u500b\u65b0\u7684\u6578\u7d44\uff0c\u8b93\u958b\u767c\u8005\u53ef\u4ee5\u66f4\u8f15\u9b06\u5730\u5c0d\u6578\u7d44\u9032\u884c\u8655\u7406\u3002\u672c\u6587\u5c07\u4ecb\u7d39TypeScript\u4e2d\u6578\u7d44\u6620\u5c04(ArrayMap)\u529f\u80fd\u7684\u4f7f\u7528\u65b9\u6cd5\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-5202","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\/pcFK27-1lU","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5202","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=5202"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5202\/revisions"}],"predecessor-version":[{"id":5203,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5202\/revisions\/5203"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=5202"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=5202"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=5202"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}