{"id":5138,"date":"2023-01-05T12:02:00","date_gmt":"2023-01-05T04:02:00","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=5138"},"modified":"2023-01-05T12:02:00","modified_gmt":"2023-01-05T04:02:00","slug":"%e4%ba%86%e8%a7%a3typescript%e4%b8%ad%e6%95%b8%e7%b5%84%e6%9f%a5%e6%89%be%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5","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%e6%9f%a5%e6%89%be%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5\/","title":{"rendered":"\u4e86\u89e3TypeScript\u4e2d\u6578\u7d44\u67e5\u627e\u7684\u57fa\u672c\u6982\u5ff5"},"content":{"rendered":"<p><meta name=\"keywords\" content=\"TypeScript, \u6578\u7d44\u7684\u67e5\u627e, Array Lookup\"><\/p>\n<h1>TypeScript \u6578\u7d44\u7684\u67e5\u627e(Array Lookup)<\/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\u6578\u7d44\u7684\u67e5\u627e\u662f\u4e00\u500b\u975e\u5e38\u91cd\u8981\u7684\u6280\u8853\uff0c\u5b83\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u66f4\u5bb9\u6613\u5730\u67e5\u627e\u6578\u7d44\u4e2d\u7684\u5143\u7d20\u3002<\/p>\n<h2>\u4ec0\u9ebc\u662f\u6578\u7d44\u7684\u67e5\u627e\uff1f<\/h2>\n<p>\u6578\u7d44\u7684\u67e5\u627e\u662f\u6307\u5728\u6578\u7d44\u4e2d\u67e5\u627e\u7279\u5b9a\u7684\u5143\u7d20\u3002\u5b83\u53ef\u4ee5\u7528\u65bc\u67e5\u627e\u7279\u5b9a\u7684\u503c\uff0c\u6216\u8005\u67e5\u627e\u7279\u5b9a\u7684\u9375\u503c\u5c0d\u3002\u5728 TypeScript \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>Array.prototype.find()<\/code> \u65b9\u6cd5\u4f86\u67e5\u627e\u6578\u7d44\u4e2d\u7684\u5143\u7d20\u3002<\/p>\n<h2>\u4f7f\u7528 <code>Array.prototype.find()<\/code> \u65b9\u6cd5<\/h2>\n<p><code>Array.prototype.find()<\/code> \u65b9\u6cd5\u53ef\u4ee5\u7528\u65bc\u67e5\u627e\u6578\u7d44\u4e2d\u7684\u5143\u7d20\u3002\u5b83\u63a5\u53d7\u4e00\u500b\u56de\u8abf\u51fd\u6578\u4f5c\u70ba\u53c3\u6578\uff0c\u8a72\u56de\u8abf\u51fd\u6578\u63a5\u53d7\u4e09\u500b\u53c3\u6578\uff1a\u7576\u524d\u5143\u7d20\u3001\u7576\u524d\u7d22\u5f15\u548c\u6578\u7d44\u672c\u8eab\u3002\u5982\u679c\u56de\u8abf\u51fd\u6578\u8fd4\u56de true\uff0c\u5247 <code>Array.prototype.find()<\/code> \u65b9\u6cd5\u6703\u8fd4\u56de\u8a72\u5143\u7d20\uff0c\u5426\u5247\u8fd4\u56de undefined\u3002<\/p>\n<p><!--more--><\/p>\n<p>\u8209\u500b\u4f8b\u5b50\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u6578\u7d44\uff0c\u5176\u4e2d\u5305\u542b\u4e86\u4e00\u4e9b\u6578\u5b57\uff1a<\/p>\n<pre><code class=\"language-typescript line-numbers\">let numbers = [1, 2, 3, 4, 5];\n<\/code><\/pre>\n<p>\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 <code>Array.prototype.find()<\/code> \u65b9\u6cd5\u4f86\u67e5\u627e\u6578\u7d44\u4e2d\u7684\u7279\u5b9a\u5143\u7d20\uff1a<\/p>\n<pre><code class=\"language-typescript line-numbers\">let result = numbers.find(n =&gt; n &gt; 3);\nconsole.log(result); \/\/ 4\n<\/code><\/pre>\n<p>\u4e0a\u9762\u7684\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u6211\u5011\u4f7f\u7528 <code>Array.prototype.find()<\/code> \u65b9\u6cd5\u4f86\u67e5\u627e\u6578\u7d44\u4e2d\u5927\u65bc 3 \u7684\u5143\u7d20\uff0c\u4e26\u5c07\u7d50\u679c\u8ce6\u503c\u7d66\u8b8a\u91cf <code>result<\/code>\u3002\u7a0b\u5f0f\u57f7\u884c\u5f8c\uff0c<code>result<\/code> \u7684\u503c\u70ba 4\uff0c\u8868\u793a\u6578\u7d44\u4e2d\u7b2c\u4e00\u500b\u5927\u65bc 3 \u7684\u5143\u7d20\u70ba 4\u3002<\/p>\n<h2>\u7e3d\u7d50<\/h2>\n<p>\u5728 TypeScript \u4e2d\uff0c\u6578\u7d44\u7684\u67e5\u627e\u662f\u4e00\u500b\u975e\u5e38\u91cd\u8981\u7684\u6280\u8853\uff0c\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u66f4\u5bb9\u6613\u5730\u67e5\u627e\u6578\u7d44\u4e2d\u7684\u5143\u7d20\u3002<code>Array.prototype.find()<\/code> \u65b9\u6cd5\u53ef\u4ee5\u7528\u65bc\u67e5\u627e\u6578\u7d44\u4e2d\u7684\u5143\u7d20\uff0c\u5b83\u63a5\u53d7\u4e00\u500b\u56de\u8abf\u51fd\u6578\u4f5c\u70ba\u53c3\u6578\uff0c\u8a72\u56de\u8abf\u51fd\u6578\u63a5\u53d7\u4e09\u500b\u53c3\u6578\uff1a\u7576\u524d\u5143\u7d20\u3001\u7576\u524d\u7d22\u5f15\u548c\u6578\u7d44\u672c\u8eab\u3002\u5982\u679c\u56de\u8abf\u51fd\u6578\u8fd4\u56de true\uff0c\u5247 <code>Array.prototype.find()<\/code> \u65b9\u6cd5\u6703\u8fd4\u56de\u8a72\u5143\u7d20\uff0c\u5426\u5247\u8fd4\u56de undefined\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6458\u8981:\u5728TypeScript\u4e2d\uff0c\u6578\u7d44\u67e5\u627e\u662f\u4e00\u7a2e\u5e38\u898b\u7684\u64cd\u4f5c\uff0c\u53ef\u4ee5\u7528\u4f86\u67e5\u627e\u7279\u5b9a\u5143\u7d20\uff0c\u6216\u8005\u67e5\u627e\u6eff\u8db3\u67d0\u4e9b\u689d\u4ef6\u7684\u5143\u7d20\u3002\u672c\u6587\u5c07\u4ecb\u7d39TypeScript\u4e2d\u6578\u7d44\u67e5\u627e\u7684\u57fa\u672c\u6982\u5ff5\uff0c\u4ee5\u53ca\u5982\u4f55\u4f7f\u7528\u5b83\u4f86\u67e5\u627e\u7279\u5b9a\u5143\u7d20\u6216\u6eff\u8db3\u67d0\u4e9b\u689d\u4ef6\u7684\u5143\u7d20\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-5138","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\/pcFK27-1kS","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5138","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=5138"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5138\/revisions"}],"predecessor-version":[{"id":5139,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5138\/revisions\/5139"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=5138"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=5138"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=5138"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}