{"id":5438,"date":"2023-01-05T12:40:50","date_gmt":"2023-01-05T04:40:50","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=5438"},"modified":"2023-01-05T12:40:50","modified_gmt":"2023-01-05T04:40:50","slug":"%e5%ad%b8%e7%bf%92typescript%e4%b8%ad%e7%9a%84maps%e5%8a%9f%e8%83%bd","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/typescript\/%e5%ad%b8%e7%bf%92typescript%e4%b8%ad%e7%9a%84maps%e5%8a%9f%e8%83%bd\/","title":{"rendered":"\u5b78\u7fd2TypeScript\u4e2d\u7684Maps\u529f\u80fd"},"content":{"rendered":"<p><meta name=\"keywords\" content=\"TypeScript, Maps\"><\/p>\n<h1>\u4f7f\u7528 TypeScript \u4f86\u64cd\u4f5c Maps<\/h1>\n<p>Maps \u662f\u4e00\u7a2e\u8cc7\u6599\u7d50\u69cb\uff0c\u5b83\u53ef\u4ee5\u5c07\u9375\u503c\u5c0d\u7684\u8cc7\u6599\u5132\u5b58\u5728\u4e00\u500b\u7269\u4ef6\u4e2d\uff0c\u800c TypeScript \u5247\u662f\u4e00\u7a2e JavaScript \u7684\u8d85\u96c6\uff0c\u5b83\u53ef\u4ee5\u63d0\u4f9b\u66f4\u591a\u7684\u529f\u80fd\uff0c\u8b93\u958b\u767c\u8005\u53ef\u4ee5\u66f4\u5bb9\u6613\u5730\u64cd\u4f5c Maps\u3002<\/p>\n<h2>TypeScript \u4e2d\u7684 Maps<\/h2>\n<p>\u5728 TypeScript \u4e2d\uff0cMaps \u53ef\u4ee5\u4f7f\u7528 <code>Map<\/code> \u985e\u5225\u4f86\u5efa\u7acb\uff0c\u5b83\u53ef\u4ee5\u63a5\u53d7\u5169\u500b\u53c3\u6578\uff0c\u7b2c\u4e00\u500b\u53c3\u6578\u662f\u9375\u7684\u578b\u5225\uff0c\u7b2c\u4e8c\u500b\u53c3\u6578\u662f\u503c\u7684\u578b\u5225\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6211\u5011\u60f3\u8981\u5efa\u7acb\u4e00\u500b\u4ee5\u5b57\u4e32\u70ba\u9375\uff0c\u4ee5\u6578\u5b57\u70ba\u503c\u7684 Map\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u7684\u8a9e\u6cd5\uff1a<\/p>\n<pre class=\"brush: typescript\">\nlet myMap = new Map<string, number>();\n<\/pre>\n<p>\u63a5\u8457\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 <code>set()<\/code> \u65b9\u6cd5\u4f86\u5c07\u9375\u503c\u5c0d\u52a0\u5165 Map \u4e2d\uff1a<\/p>\n<pre class=\"brush: typescript\">\nmyMap.set('one', 1);\nmyMap.set('two', 2);\nmyMap.set('three', 3);\n<\/pre>\n<h2>\u53d6\u5f97 Map \u4e2d\u7684\u8cc7\u6599<\/h2>\n<p>\u7576\u6211\u5011\u60f3\u8981\u53d6\u5f97 Map \u4e2d\u7684\u8cc7\u6599\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>get()<\/code> \u65b9\u6cd5\uff0c\u5b83\u53ef\u4ee5\u63a5\u53d7\u4e00\u500b\u53c3\u6578\uff0c\u4e5f\u5c31\u662f\u8981\u53d6\u5f97\u7684\u9375\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre class=\"brush: typescript\">\nlet value = myMap.get('one');\nconsole.log(value); \/\/ 1\n<\/pre>\n<h2>\u522a\u9664 Map \u4e2d\u7684\u8cc7\u6599<\/h2>\n<p>\u5982\u679c\u6211\u5011\u60f3\u8981\u522a\u9664 Map \u4e2d\u7684\u8cc7\u6599\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>delete()<\/code> \u65b9\u6cd5\uff0c\u5b83\u53ef\u4ee5\u63a5\u53d7\u4e00\u500b\u53c3\u6578\uff0c\u4e5f\u5c31\u662f\u8981\u522a\u9664\u7684\u9375\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre class=\"brush: typescript\">\nmyMap.delete('one');\n<\/pre>\n<h2>\u6aa2\u67e5 Map \u4e2d\u662f\u5426\u6709\u8cc7\u6599<\/h2>\n<p>\u5982\u679c\u6211\u5011\u60f3\u8981\u6aa2\u67e5 Map \u4e2d\u662f\u5426\u6709\u67d0\u500b\u9375\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>has()<\/code> \u65b9\u6cd5\uff0c\u5b83\u53ef\u4ee5\u63a5\u53d7\u4e00\u500b\u53c3\u6578\uff0c\u4e5f\u5c31\u662f\u8981\u6aa2\u67e5\u7684\u9375\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre class=\"brush: typescript\">\nlet hasKey = myMap.has('one');\nconsole.log(hasKey); \/\/ false\n<\/pre>\n<h2>\u6e05\u7a7a Map \u4e2d\u7684\u8cc7\u6599<\/h2>\n<p>\u5982\u679c\u6211\u5011\u60f3\u8981\u6e05\u7a7a Map \u4e2d\u7684\u8cc7\u6599\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>clear()<\/code> \u65b9\u6cd5\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre class=\"brush: typescript\">\nmyMap.clear();\n<\/pre>\n<p><!--more--><\/p>\n<h2>\u7e3d\u7d50<\/h2>\n<p>\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u4ecb\u7d39\u4e86\u5982\u4f55\u4f7f\u7528 TypeScript \u4f86\u64cd\u4f5c Maps\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 <code>Map<\/code> \u985e\u5225\u4f86\u5efa\u7acb Maps\uff0c\u4e26\u4e14\u53ef\u4ee5\u4f7f\u7528 <code>set()<\/code>\u3001<code>get()<\/code>\u3001<code>delete()<\/code>\u3001<code>has()<\/code> \u548c <code>clear()<\/code> \u65b9\u6cd5\u4f86\u64cd\u4f5c Maps\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2TypeScript\u4e2d\u7684Maps\u529f\u80fd\uff0c\u4e86\u89e3\u5982\u4f55\u4f7f\u7528Maps\u4f86\u512a\u5316\u7a0b\u5f0f\u78bc\uff0c\u4e26\u63a2\u7d22Maps\u7684\u512a\u9ede\u548c\u7f3a\u9ede\u3002\u901a\u904e\u672c\u6587\uff0c\u4f60\u5c07\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528Maps\u4f86\u6539\u5584\u7a0b\u5f0f\u78bc\u7684\u53ef\u8b80\u6027\u548c\u53ef\u7dad\u8b77\u6027\uff0c\u4ee5\u53ca\u5982\u4f55\u66f4\u6709\u6548\u5730\u4f7f\u7528\u5b83\u5011\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-5438","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\/pcFK27-1pI","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5438","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=5438"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5438\/revisions"}],"predecessor-version":[{"id":5439,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5438\/revisions\/5439"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=5438"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=5438"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=5438"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}