{"id":5560,"date":"2023-01-05T13:09:54","date_gmt":"2023-01-05T05:09:54","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=5560"},"modified":"2023-01-05T13:09:54","modified_gmt":"2023-01-05T05:09:54","slug":"%e5%88%a9%e7%94%a8typescriptmap%e5%b0%87map%e5%b0%8d%e8%b1%a1%e7%9a%84%e5%85%83%e7%b4%a0%e6%98%a0%e5%b0%84%e5%88%b0%e5%8f%a6%e4%b8%80%e5%80%8bmap%e5%b0%8d%e8%b1%a1","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/typescript\/%e5%88%a9%e7%94%a8typescriptmap%e5%b0%87map%e5%b0%8d%e8%b1%a1%e7%9a%84%e5%85%83%e7%b4%a0%e6%98%a0%e5%b0%84%e5%88%b0%e5%8f%a6%e4%b8%80%e5%80%8bmap%e5%b0%8d%e8%b1%a1\/","title":{"rendered":"\u5229\u7528TypeScriptMap\u5c07Map\u5c0d\u8c61\u7684\u5143\u7d20\u6620\u5c04\u5230\u53e6\u4e00\u500bMap\u5c0d\u8c61"},"content":{"rendered":"<p><meta name=\"keywords\" content=\"TypeScript, Map, Map \u5c0d\u8c61, \u6620\u5c04, \u53e6\u4e00\u500b Map \u5c0d\u8c61, mapValues\"><\/p>\n<h1>\u4f7f\u7528 TypeScript Map \u5c07 Map \u5c0d\u8c61\u7684\u6bcf\u4e00\u500b\u5143\u7d20\u6620\u5c04\u5230\u53e6\u4e00\u500b Map \u5c0d\u8c61(mapValues)<\/h1>\n<p>TypeScript Map \u662f\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u5de5\u5177\uff0c\u5b83\u53ef\u4ee5\u8b93\u6211\u5011\u5c07 Map \u5c0d\u8c61\u7684\u6bcf\u4e00\u500b\u5143\u7d20\u6620\u5c04\u5230\u53e6\u4e00\u500b Map \u5c0d\u8c61\uff0c\u800c\u4e0d\u9700\u8981\u91cd\u65b0\u5275\u5efa\u65b0\u7684 Map \u5c0d\u8c61\u3002\u9019\u500b\u529f\u80fd\u53ef\u4ee5\u8b93\u6211\u5011\u66f4\u5feb\u901f\u5730\u5c0d Map \u5c0d\u8c61\u9032\u884c\u64cd\u4f5c\uff0c\u4e26\u4e14\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u4f7f\u7528 Map \u5c0d\u8c61\u7684\u8cc7\u6e90\u3002<\/p>\n<p>\u5728 TypeScript \u4e2d\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 <code>mapValues()<\/code> \u65b9\u6cd5\u5c07 Map \u5c0d\u8c61\u7684\u6bcf\u4e00\u500b\u5143\u7d20\u6620\u5c04\u5230\u53e6\u4e00\u500b Map \u5c0d\u8c61\u3002\u8a72\u65b9\u6cd5\u63a5\u53d7\u4e00\u500b\u51fd\u6578\u4f5c\u70ba\u53c3\u6578\uff0c\u8a72\u51fd\u6578\u63a5\u53d7 Map \u5c0d\u8c61\u4e2d\u7684\u6bcf\u4e00\u500b\u5143\u7d20\u4f5c\u70ba\u53c3\u6578\uff0c\u4e26\u8fd4\u56de\u4e00\u500b\u65b0\u7684 Map \u5c0d\u8c61\u3002<\/p>\n<p>\u8209\u500b\u4f8b\u5b50\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b Map \u5c0d\u8c61\uff0c\u5176\u4e2d\u5305\u542b\u4e86\u4e00\u4e9b\u5b57\u7b26\u4e32\uff1a<\/p>\n<pre><code class=\"line-numbers\">let myMap = new Map();\nmyMap.set('a', 'Apple');\nmyMap.set('b', 'Banana');\nmyMap.set('c', 'Cherry');\n<\/code><\/pre>\n<p>\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 <code>mapValues()<\/code> \u65b9\u6cd5\u5c07\u6bcf\u4e00\u500b\u5143\u7d20\u6620\u5c04\u5230\u53e6\u4e00\u500b Map \u5c0d\u8c61\uff0c\u4e26\u5c07\u6bcf\u4e00\u500b\u5143\u7d20\u7684\u503c\u8f49\u63db\u70ba\u5927\u5beb\uff1a<\/p>\n<pre><code class=\"line-numbers\">let newMap = myMap.mapValues(value =&gt; value.toUpperCase());\n<\/code><\/pre>\n<p>\u73fe\u5728\uff0c<code>newMap<\/code> \u5c0d\u8c61\u4e2d\u5305\u542b\u4e86\u6bcf\u4e00\u500b\u5143\u7d20\u7684\u5927\u5beb\u503c\uff1a<\/p>\n<pre><code class=\"line-numbers\">console.log(newMap.get('a')); \/\/ 'APPLE'\nconsole.log(newMap.get('b')); \/\/ 'BANANA'\nconsole.log(newMap.get('c')); \/\/ 'CHERRY'\n<\/code><\/pre>\n<p>\u4f7f\u7528 <code>mapValues()<\/code> \u65b9\u6cd5\u53ef\u4ee5\u8b93\u6211\u5011\u66f4\u5feb\u901f\u5730\u5c0d Map \u5c0d\u8c61\u9032\u884c\u64cd\u4f5c\uff0c\u4e26\u4e14\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u4f7f\u7528 Map \u5c0d\u8c61\u7684\u8cc7\u6e90\u3002\u5b83\u53ef\u4ee5\u8b93\u6211\u5011\u5c07 Map \u5c0d\u8c61\u7684\u6bcf\u4e00\u500b\u5143\u7d20\u6620\u5c04\u5230\u53e6\u4e00\u500b Map \u5c0d\u8c61\uff0c\u800c\u4e0d\u9700\u8981\u91cd\u65b0\u5275\u5efa\u65b0\u7684 Map \u5c0d\u8c61\u3002<\/p>\n<p><!--more--><\/p>\n<p>\u6b64\u5916\uff0c<code>mapValues()<\/code> \u65b9\u6cd5\u9084\u53ef\u4ee5\u63a5\u53d7\u4e00\u500b\u53ef\u9078\u7684\u7b2c\u4e8c\u500b\u53c3\u6578\uff0c\u8a72\u53c3\u6578\u53ef\u4ee5\u7528\u65bc\u6307\u5b9a\u51fd\u6578\u7684 <code>this<\/code> \u5c0d\u8c61\u3002\u9019\u53ef\u4ee5\u8b93\u6211\u5011\u5728\u51fd\u6578\u4e2d\u4f7f\u7528 <code>this<\/code> \u5c0d\u8c61\uff0c\u800c\u4e0d\u9700\u8981\u4f7f\u7528 <code>bind()<\/code> \u65b9\u6cd5\u3002<\/p>\n<p>\u7e3d\u4e4b\uff0cTypeScript Map \u63d0\u4f9b\u4e86\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684 <code>mapValues()<\/code> \u65b9\u6cd5\uff0c\u53ef\u4ee5\u8b93\u6211\u5011\u5c07 Map \u5c0d\u8c61\u7684\u6bcf\u4e00\u500b\u5143\u7d20\u6620\u5c04\u5230\u53e6\u4e00\u500b Map \u5c0d\u8c61\uff0c\u800c\u4e0d\u9700\u8981\u91cd\u65b0\u5275\u5efa\u65b0\u7684 Map \u5c0d\u8c61\u3002\u5b83\u53ef\u4ee5\u8b93\u6211\u5011\u66f4\u5feb\u901f\u5730\u5c0d Map \u5c0d\u8c61\u9032\u884c\u64cd\u4f5c\uff0c\u4e26\u4e14\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u4f7f\u7528 Map \u5c0d\u8c61\u7684\u8cc7\u6e90\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6458\u8981\uff1aTypeScriptMap\u662f\u4e00\u7a2e\u5c0d\u8c61\uff0c\u53ef\u4ee5\u5c07Map\u5c0d\u8c61\u7684\u6bcf\u500b\u5143\u7d20\u6620\u5c04\u5230\u53e6\u4e00\u500bMap\u5c0d\u8c61\uff0c\u4ee5\u63d0\u4f9b\u66f4\u9ad8\u6548\u7684\u67e5\u627e\u548c\u64cd\u4f5c\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528TypeScriptMap\u5c0d\u8c61\u7684mapValues()\u51fd\u6578\uff0c\u4ee5\u53ca\u5b83\u7684\u529f\u80fd\u548c\u512a\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-5560","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\/pcFK27-1rG","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5560","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=5560"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5560\/revisions"}],"predecessor-version":[{"id":5561,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5560\/revisions\/5561"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=5560"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=5560"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=5560"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}