{"id":5492,"date":"2023-01-05T12:47:19","date_gmt":"2023-01-05T04:47:19","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=5492"},"modified":"2023-01-05T12:47:19","modified_gmt":"2023-01-05T04:47:19","slug":"%e5%ad%b8%e7%bf%92%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8typescriptmap%e4%b8%ad%e7%9a%84getvalue%e5%87%bd%e6%95%b8","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%a8typescriptmap%e4%b8%ad%e7%9a%84getvalue%e5%87%bd%e6%95%b8\/","title":{"rendered":"\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528TypeScriptMap\u4e2d\u7684getValue\u51fd\u6578"},"content":{"rendered":"<p><meta name=\"keywords\" content=\"TypeScript, Map, getValue\"><\/p>\n<h1>TypeScript Map \u8fd4\u56de Map \u5bf9\u8c61\u4e2d\u6307\u5b9a\u952e\u7684\u503c(getValue)<\/h1>\n<p>TypeScript Map \u662f\u4e00\u500b\u7528\u65bc\u5b58\u5132\u9375\u503c\u5c0d\u7684\u6578\u64da\u7d50\u69cb\uff0c\u5b83\u53ef\u4ee5\u7528\u65bc\u5b58\u5132\u4efb\u4f55\u985e\u578b\u7684\u6578\u64da\uff0c\u4e26\u4e14\u53ef\u4ee5\u901a\u904e\u9375\u4f86\u5feb\u901f\u67e5\u627e\u548c\u66f4\u65b0\u6578\u64da\u3002Map \u5c0d\u8c61\u63d0\u4f9b\u4e86\u4e00\u500b getValue() \u65b9\u6cd5\uff0c\u53ef\u4ee5\u7528\u4f86\u8fd4\u56de Map \u5c0d\u8c61\u4e2d\u6307\u5b9a\u9375\u7684\u503c\u3002<\/p>\n<h2>TypeScript Map getValue() \u65b9\u6cd5<\/h2>\n<p>TypeScript Map getValue() \u65b9\u6cd5\u7528\u65bc\u8fd4\u56de Map \u5c0d\u8c61\u4e2d\u6307\u5b9a\u9375\u7684\u503c\u3002\u5b83\u63a5\u53d7\u4e00\u500b\u53c3\u6578\uff0c\u5373\u8981\u67e5\u627e\u7684\u9375\uff0c\u4e26\u8fd4\u56de\u8207\u8a72\u9375\u76f8\u95dc\u806f\u7684\u503c\u3002\u5982\u679c\u6307\u5b9a\u7684\u9375\u4e0d\u5b58\u5728\uff0c\u5247\u8fd4\u56de undefined\u3002<\/p>\n<h2>TypeScript Map getValue() \u65b9\u6cd5\u793a\u4f8b<\/h2>\n<p>\u4e0b\u9762\u7684\u793a\u4f8b\u6f14\u793a\u4e86\u5982\u4f55\u4f7f\u7528 TypeScript Map getValue() \u65b9\u6cd5\uff1a<\/p>\n<pre class=\"brush: javascript\">\nlet map = new Map();\n\nmap.set('name', 'John');\nmap.set('age', 30);\n\nlet name = map.getValue('name');\nlet age = map.getValue('age');\n\nconsole.log(name); \/\/ John\nconsole.log(age); \/\/ 30\n<\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e00\u500b Map \u5c0d\u8c61\uff0c\u4e26\u4f7f\u7528 set() \u65b9\u6cd5\u5c07\u9375\u503c\u5c0d\u6dfb\u52a0\u5230 Map \u5c0d\u8c61\u4e2d\u3002\u7136\u5f8c\uff0c\u6211\u5011\u4f7f\u7528 getValue() \u65b9\u6cd5\u4f86\u67e5\u627e\u6307\u5b9a\u9375\u7684\u503c\uff0c\u4e26\u5c07\u5176\u5b58\u5132\u5728\u8b8a\u91cf\u4e2d\u3002\u6700\u5f8c\uff0c\u6211\u5011\u4f7f\u7528 console.log() \u65b9\u6cd5\u5c07\u503c\u6253\u5370\u5230\u63a7\u5236\u53f0\u3002<\/p>\n<p><!--more--><\/p>\n<h2>\u7e3d\u7d50<\/h2>\n<p>TypeScript Map getValue() \u65b9\u6cd5\u7528\u65bc\u8fd4\u56de Map \u5c0d\u8c61\u4e2d\u6307\u5b9a\u9375\u7684\u503c\u3002\u5b83\u63a5\u53d7\u4e00\u500b\u53c3\u6578\uff0c\u5373\u8981\u67e5\u627e\u7684\u9375\uff0c\u4e26\u8fd4\u56de\u8207\u8a72\u9375\u76f8\u95dc\u806f\u7684\u503c\u3002\u5982\u679c\u6307\u5b9a\u7684\u9375\u4e0d\u5b58\u5728\uff0c\u5247\u8fd4\u56de undefined\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6458\u8981\uff1a\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528TypeScriptMap\u4e2d\u7684getValue\u51fd\u6578\uff0c\u8a72\u51fd\u6578\u53ef\u4ee5\u5f9eMap\u5c0d\u8c61\u4e2d\u8fd4\u56de\u6307\u5b9a\u9375\u7684\u503c\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u7c21\u55ae\u7684\u793a\u4f8b\u4f86\u89e3\u91cb\u5982\u4f55\u4f7f\u7528\u5b83\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-5492","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\/pcFK27-1qA","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5492","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=5492"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5492\/revisions"}],"predecessor-version":[{"id":5493,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5492\/revisions\/5493"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=5492"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=5492"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=5492"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}