{"id":5108,"date":"2023-01-05T11:57:23","date_gmt":"2023-01-05T03:57:23","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=5108"},"modified":"2023-01-05T11:57:23","modified_gmt":"2023-01-05T03:57:23","slug":"%e4%ba%86%e8%a7%a3typescript%e4%b8%ad%e6%95%b8%e7%b5%84%e7%9a%84%e8%81%9a%e5%90%88%e5%8a%9f%e8%83%bd","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%e7%9a%84%e8%81%9a%e5%90%88%e5%8a%9f%e8%83%bd\/","title":{"rendered":"\u4e86\u89e3TypeScript\u4e2d\u6578\u7d44\u7684\u805a\u5408\u529f\u80fd"},"content":{"rendered":"

<\/p>\n

TypeScript \u6578\u7d44\u7684\u805a\u5408(Array Aggregation)<\/h1>\n

TypeScript \u662f\u4e00\u7a2e JavaScript \u7684\u8d85\u96c6\uff0c\u5b83\u63d0\u4f9b\u4e86\u66f4\u591a\u7684\u7279\u6027\uff0c\u8b93\u958b\u767c\u8005\u53ef\u4ee5\u66f4\u8f15\u9b06\u5730\u958b\u767c\u51fa\u66f4\u512a\u79c0\u7684\u7a0b\u5f0f\u78bc\u3002\u5176\u4e2d\u4e00\u500b\u91cd\u8981\u7684\u7279\u6027\u5c31\u662f\u300c\u6578\u7d44\u7684\u805a\u5408(Array Aggregation)\u300d\uff0c\u5b83\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u66f4\u5bb9\u6613\u5730\u5c0d\u6578\u7d44\u9032\u884c\u8655\u7406\uff0c\u4e26\u4e14\u53ef\u4ee5\u66f4\u6709\u6548\u7387\u5730\u5b8c\u6210\u4efb\u52d9\u3002<\/p>\n

\u4ec0\u9ebc\u662f\u6578\u7d44\u7684\u805a\u5408<\/h2>\n

\u6578\u7d44\u7684\u805a\u5408\u662f\u6307\u5c0d\u6578\u7d44\u4e2d\u7684\u5143\u7d20\u9032\u884c\u8655\u7406\uff0c\u4ee5\u5f97\u5230\u4e00\u500b\u65b0\u7684\u6578\u7d44\uff0c\u5176\u4e2d\u5305\u542b\u4e86\u539f\u6578\u7d44\u4e2d\u7684\u5143\u7d20\u7684\u8655\u7406\u7d50\u679c\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u5c0d\u6578\u7d44\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u9032\u884c\u52a0\u6cd5\u904b\u7b97\uff0c\u5f97\u5230\u4e00\u500b\u65b0\u7684\u6578\u7d44\uff0c\u5176\u4e2d\u5305\u542b\u4e86\u539f\u6578\u7d44\u4e2d\u6bcf\u500b\u5143\u7d20\u52a0\u4e0a\u4e00\u500b\u6578\u503c\u7684\u7d50\u679c\u3002<\/p>\n

<\/p>\n

TypeScript \u4e2d\u7684\u6578\u7d44\u805a\u5408<\/h2>\n

TypeScript \u63d0\u4f9b\u4e86\u4e00\u7cfb\u5217\u7684\u51fd\u6578\uff0c\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u66f4\u5bb9\u6613\u5730\u5c0d\u6578\u7d44\u9032\u884c\u805a\u5408\u3002\u5176\u4e2d\u6700\u5e38\u7528\u7684\u51fd\u6578\u6709 map()<\/code>\u3001filter()<\/code> \u548c reduce()<\/code>\u3002<\/p>\n

map()<\/h3>\n

map()<\/code> \u51fd\u6578\u53ef\u4ee5\u5c0d\u6578\u7d44\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u57f7\u884c\u6307\u5b9a\u7684\u51fd\u6578\uff0c\u4e26\u8fd4\u56de\u4e00\u500b\u65b0\u7684\u6578\u7d44\uff0c\u5176\u4e2d\u5305\u542b\u4e86\u539f\u6578\u7d44\u4e2d\u6bcf\u500b\u5143\u7d20\u57f7\u884c\u6307\u5b9a\u51fd\u6578\u5f8c\u7684\u7d50\u679c\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u5c0d\u6578\u7d44\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u9032\u884c\u5e73\u65b9\u904b\u7b97\uff0c\u5f97\u5230\u4e00\u500b\u65b0\u7684\u6578\u7d44\uff0c\u5176\u4e2d\u5305\u542b\u4e86\u539f\u6578\u7d44\u4e2d\u6bcf\u500b\u5143\u7d20\u7684\u5e73\u65b9\u7d50\u679c\uff1a<\/p>\n

\nlet numbers = [1, 2, 3, 4, 5];\nlet squares = numbers.map(x => x * x);\nconsole.log(squares); \/\/ [1, 4, 9, 16, 25]\n<\/pre>\n
filter()<\/h3>\n
filter()<\/code> \u51fd\u6578\u53ef\u4ee5\u5c0d\u6578\u7d44\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u57f7\u884c\u6307\u5b9a\u7684\u51fd\u6578\uff0c\u4e26\u8fd4\u56de\u4e00\u500b\u65b0\u7684\u6578\u7d44\uff0c\u5176\u4e2d\u53ea\u5305\u542b\u4e86\u539f\u6578\u7d44\u4e2d\u6eff\u8db3\u6307\u5b9a\u51fd\u6578\u689d\u4ef6\u7684\u5143\u7d20\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u5c0d\u6578\u7d44\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u9032\u884c\u6aa2\u67e5\uff0c\u53ea\u8fd4\u56de\u5927\u65bc 10 \u7684\u5143\u7d20\uff1a<\/p>\n
\nlet numbers = [1, 2, 3, 4, 5, 10, 11, 12, 13, 14, 15];\nlet greaterThan10 = numbers.filter(x => x > 10);\nconsole.log(greaterThan10); \/\/ [11, 12, 13, 14, 15]\n<\/pre>\n
reduce()<\/h3>\n
reduce()<\/code> \u51fd\u6578\u53ef\u4ee5\u5c0d\u6578\u7d44\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u57f7\u884c\u6307\u5b9a\u7684\u51fd\u6578\uff0c\u4e26\u8fd4\u56de\u4e00\u500b\u55ae\u4e00\u7684\u7d50\u679c\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u5c0d\u6578\u7d44\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u9032\u884c\u52a0\u6cd5\u904b\u7b97\uff0c\u5f97\u5230\u6578\u7d44\u4e2d\u6240\u6709\u5143\u7d20\u7684\u7e3d\u548c\uff1a<\/p>\n
\nlet numbers = [1, 2, 3, 4, 5];\nlet sum = numbers.reduce((acc, x) => acc + x, 0);\nconsole.log(sum); \/\/ 15\n<\/pre>\n
\u7e3d\u7d50<\/h2>\n
TypeScript \u63d0\u4f9b\u4e86\u4e00\u7cfb\u5217\u7684\u51fd\u6578\uff0c\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u66f4\u5bb9\u6613\u5730\u5c0d\u6578\u7d44\u9032\u884c\u805a\u5408\uff0c\u4e26\u4e14\u53ef\u4ee5\u66f4\u6709\u6548\u7387\u5730\u5b8c\u6210\u4efb\u52d9\u3002map()<\/code>\u3001filter()<\/code> \u548c reduce()<\/code> \u9019\u4e09\u500b\u51fd\u6578\u662f\u6700\u5e38\u7528\u7684\uff0c\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u5c0d\u6578\u7d44\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u9032\u884c\u8655\u7406\uff0c\u4ee5\u5f97\u5230\u4e00\u500b\u65b0\u7684\u6578\u7d44\uff0c\u5176\u4e2d\u5305\u542b\u4e86\u539f\u6578\u7d44\u4e2d\u7684\u5143\u7d20\u7684\u8655\u7406\u7d50\u679c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6587\u7ae0\u6458\u8981:TypeScript\u4e2d\u7684\u6578\u7d44\u805a\u5408\u529f\u80fd\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u66f4\u8f15\u9b06\u5730\u5c0d\u6578\u7d44\u9032\u884c\u64cd\u4f5c\uff0c\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528TypeScript\u4e2d\u7684\u6578\u7d44\u805a\u5408\u529f\u80fd\uff0c\u4ee5\u53ca\u5b83\u5011\u7684\u512a\u9ede\u548c\u7f3a\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-5108","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\/pcFK27-1ko","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5108","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=5108"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5108\/revisions"}],"predecessor-version":[{"id":5109,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5108\/revisions\/5109"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=5108"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=5108"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=5108"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}