{"id":5516,"date":"2023-01-05T12:53:47","date_gmt":"2023-01-05T04:53:47","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=5516"},"modified":"2023-01-05T12:53:47","modified_gmt":"2023-01-05T04:53:47","slug":"%e5%ad%b8%e7%bf%92%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8typescript%e4%b8%ad%e7%9a%84%e6%b1%82%e5%92%8csum%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%a8typescript%e4%b8%ad%e7%9a%84%e6%b1%82%e5%92%8csum%e5%87%bd%e6%95%b8\/","title":{"rendered":"\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528TypeScript\u4e2d\u7684\u6c42\u548c(sum)\u51fd\u6578"},"content":{"rendered":"<p><meta name=\"keywords\" content=\"TypeScript, \u9663\u5217, \u6c42\u548c, sum\"><\/p>\n<p>TypeScript \u662f\u4e00\u7a2e JavaScript \u7684\u8d85\u96c6\uff0c\u5b83\u64c1\u6709\u66f4\u591a\u7684\u529f\u80fd\uff0c\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u66f4\u5bb9\u6613\u5730\u958b\u767c\u51fa\u66f4\u9ad8\u54c1\u8cea\u7684\u7a0b\u5f0f\u78bc\u3002\u5728 TypeScript \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u9663\u5217\u4f86\u5132\u5b58\u8cc7\u6599\uff0c\u800c\u4e14\u53ef\u4ee5\u4f7f\u7528\u6c42\u548c\u7684\u65b9\u5f0f\u4f86\u8a08\u7b97\u9663\u5217\u4e2d\u7684\u6240\u6709\u5143\u7d20\u7684\u7e3d\u548c\u3002<\/p>\n<h2>TypeScript \u9663\u5217\u7684\u6c42\u548c(sum)<\/h2>\n<p>\u5728 TypeScript \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 <span style=\"color: #009900; font-weight: bold;\">Array.prototype.reduce()<\/span> \u65b9\u6cd5\u4f86\u5c0d\u9663\u5217\u4e2d\u7684\u5143\u7d20\u9032\u884c\u6c42\u548c\u3002<span style=\"color: #009900; font-weight: bold;\">Array.prototype.reduce()<\/span> \u65b9\u6cd5\u6703\u5c0d\u9663\u5217\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u57f7\u884c\u4e00\u6b21 callback \u51fd\u5f0f\uff0c\u4e26\u5c07 callback \u51fd\u5f0f\u7684\u56de\u50b3\u503c\u7d2f\u52a0\u8d77\u4f86\uff0c\u6700\u5f8c\u56de\u50b3\u7d2f\u52a0\u7684\u7d50\u679c\u3002<\/p>\n<p><!--more--><\/p>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u7bc4\u4f8b\uff0c\u4f7f\u7528 <span style=\"color: #009900; font-weight: bold;\">Array.prototype.reduce()<\/span> \u65b9\u6cd5\u5c0d\u9663\u5217\u4e2d\u7684\u5143\u7d20\u6c42\u548c\uff1a<\/p>\n<pre class=\"brush: typescript\">\nlet numbers = [1, 2, 3, 4, 5];\n\nlet sum = numbers.reduce((accumulator, currentValue) => {\n  return accumulator + currentValue;\n}, 0);\n\nconsole.log(sum); \/\/ 15\n<\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u7bc4\u4f8b\u4e2d\uff0c\u6211\u5011\u4f7f\u7528 <span style=\"color: #009900; font-weight: bold;\">Array.prototype.reduce()<\/span> \u65b9\u6cd5\u5c0d numbers \u9663\u5217\u4e2d\u7684\u5143\u7d20\u6c42\u548c\uff0c\u4e26\u5c07\u7d50\u679c\u5b58\u653e\u5728 sum \u8b8a\u6578\u4e2d\u3002<\/p>\n<p><span style=\"color: #009900; font-weight: bold;\">Array.prototype.reduce()<\/span> \u65b9\u6cd5\u63a5\u53d7\u5169\u500b\u53c3\u6578\uff1aaccumulator \u548c currentValue\u3002accumulator \u662f\u7d2f\u52a0\u5668\uff0c\u6703\u5c07 callback \u51fd\u5f0f\u7684\u56de\u50b3\u503c\u7d2f\u52a0\u8d77\u4f86\uff1bcurrentValue \u662f\u7576\u524d\u5143\u7d20\u7684\u503c\u3002<\/p>\n<p>\u5728\u4e0a\u9762\u7684\u7bc4\u4f8b\u4e2d\uff0c\u6211\u5011\u5c07 accumulator \u7684\u521d\u59cb\u503c\u8a2d\u70ba 0\uff0c\u4e26\u5c07 callback \u51fd\u5f0f\u7684\u56de\u50b3\u503c\u52a0\u5230 accumulator \u4e2d\uff0c\u6700\u5f8c\u56de\u50b3\u7d2f\u52a0\u7684\u7d50\u679c\u3002<\/p>\n<p><span style=\"color: #009900; font-weight: bold;\">Array.prototype.reduce()<\/span> \u65b9\u6cd5\u662f\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u66f4\u5bb9\u6613\u5730\u5c0d\u9663\u5217\u4e2d\u7684\u5143\u7d20\u9032\u884c\u6c42\u548c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528TypeScript\u4e2d\u7684\u6c42\u548c(sum)\u51fd\u6578\uff0c\u53ef\u4ee5\u8f15\u9b06\u5730\u5c0d\u9663\u5217\u4e2d\u7684\u6578\u5b57\u9032\u884c\u6c42\u548c\uff0c\u4e26\u7372\u5f97\u6700\u7d42\u7d50\u679c\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528TypeScript\u4e2d\u7684sum\u51fd\u6578\uff0c\u4ee5\u53ca\u5982\u4f55\u4f7f\u7528\u5b83\u4f86\u8a08\u7b97\u9663\u5217\u4e2d\u7684\u6578\u5b57\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-5516","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\/pcFK27-1qY","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5516","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=5516"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5516\/revisions"}],"predecessor-version":[{"id":5517,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5516\/revisions\/5517"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=5516"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=5516"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=5516"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}