{"id":6490,"date":"2023-01-08T21:17:00","date_gmt":"2023-01-08T13:17:00","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=6490"},"modified":"2023-01-08T21:17:00","modified_gmt":"2023-01-08T13:17:00","slug":"%e5%a6%82%e4%bd%95%e5%88%a9%e7%94%a8react-js%e5%8e%bb%e9%87%8duniquelist-2","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/react-js\/%e5%a6%82%e4%bd%95%e5%88%a9%e7%94%a8react-js%e5%8e%bb%e9%87%8duniquelist-2\/","title":{"rendered":"\u5982\u4f55\u5229\u7528React.JS\u53bb\u91cd(unique)List"},"content":{"rendered":"

<\/p>\n

\u5982\u4f55\u4f7f\u7528 React.JS \u5be6\u73fe React List \u7684\u53bb\u91cd(unique)<\/h1>\n

React.JS \u662f\u4e00\u500b\u7528\u65bc\u69cb\u5efa\u7528\u6236\u754c\u9762\u7684 JavaScript \u5eab\uff0c\u5b83\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u66f4\u8f15\u9b06\u5730\u69cb\u5efa\u9ad8\u6027\u80fd\u7684\u7db2\u9801\u61c9\u7528\u7a0b\u5e8f\u3002\u5728 React.JS \u4e2d\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u4f7f\u7528 React List \u4f86\u5275\u5efa\u4e00\u500b\u5217\u8868\uff0c\u4f46\u662f\u5982\u679c\u5217\u8868\u4e2d\u6709\u91cd\u8907\u7684\u5143\u7d20\uff0c\u5c31\u6703\u51fa\u73fe\u554f\u984c\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528 React.JS \u5be6\u73fe React List \u7684\u53bb\u91cd(unique)\u3002<\/p>\n

\u4f7f\u7528 JavaScript \u7684 Set() \u65b9\u6cd5<\/h2>\n

Set() \u662f JavaScript \u4e2d\u7684\u4e00\u500b\u5167\u7f6e\u51fd\u6578\uff0c\u5b83\u53ef\u4ee5\u7528\u4f86\u5275\u5efa\u4e00\u500b\u4e0d\u5305\u542b\u91cd\u8907\u5143\u7d20\u7684\u96c6\u5408\u3002\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 Set() \u65b9\u6cd5\u5c07 React List \u4e2d\u7684\u91cd\u8907\u5143\u7d20\u53bb\u9664\uff0c\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff1a<\/p>\n

\nconst list = [1, 2, 3, 4, 4, 5, 5];\nconst uniqueList = [...new Set(list)];\nconsole.log(uniqueList); \/\/ [1, 2, 3, 4, 5]\n<\/pre>\n
\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u4f7f\u7528 Set() \u65b9\u6cd5\u5c07 React List \u4e2d\u7684\u91cd\u8907\u5143\u7d20\u53bb\u9664\uff0c\u5f97\u5230\u4e00\u500b\u4e0d\u5305\u542b\u91cd\u8907\u5143\u7d20\u7684\u65b0\u5217\u8868\u3002<\/p>\n
\u4f7f\u7528 JavaScript \u7684 filter() \u65b9\u6cd5<\/h2>\n
filter() \u662f JavaScript \u4e2d\u7684\u4e00\u500b\u5167\u7f6e\u51fd\u6578\uff0c\u5b83\u53ef\u4ee5\u7528\u4f86\u904e\u6ffe\u6578\u7d44\u4e2d\u7684\u5143\u7d20\u3002\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 filter() \u65b9\u6cd5\u5c07 React List \u4e2d\u7684\u91cd\u8907\u5143\u7d20\u53bb\u9664\uff0c\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff1a<\/p>\n
\nconst list = [1, 2, 3, 4, 4, 5, 5];\nconst uniqueList = list.filter((item, index) => list.indexOf(item) === index);\nconsole.log(uniqueList); \/\/ [1, 2, 3, 4, 5]\n<\/pre>\n
\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u4f7f\u7528 filter() \u65b9\u6cd5\u5c07 React List \u4e2d\u7684\u91cd\u8907\u5143\u7d20\u53bb\u9664\uff0c\u5f97\u5230\u4e00\u500b\u4e0d\u5305\u542b\u91cd\u8907\u5143\u7d20\u7684\u65b0\u5217\u8868\u3002<\/p>\n
\u4f7f\u7528 React.JS \u7684 Array.prototype.reduce() \u65b9\u6cd5<\/h2>\n
Array.prototype.reduce() \u662f React.JS \u4e2d\u7684\u4e00\u500b\u5167\u7f6e\u51fd\u6578\uff0c\u5b83\u53ef\u4ee5\u7528\u4f86\u5c0d\u6578\u7d44\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u57f7\u884c\u6307\u5b9a\u7684\u64cd\u4f5c\u3002\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 Array.prototype.reduce() \u65b9\u6cd5\u5c07 React List \u4e2d\u7684\u91cd\u8907\u5143\u7d20\u53bb\u9664\uff0c\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff1a<\/p>\n
\nconst list = [1, 2, 3, 4, 4, 5, 5];\nconst uniqueList = list.reduce((acc, item) => {\n  if (!acc.includes(item)) {\n    acc.push(item);\n  }\n  return acc;\n}, []);\nconsole.log(uniqueList); \/\/ [1, 2, 3, 4, 5]\n<\/pre>\n
\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u4f7f\u7528 Array.prototype.reduce() \u65b9\u6cd5\u5c07 React List \u4e2d\u7684\u91cd\u8907\u5143\u7d20\u53bb\u9664\uff0c\u5f97\u5230\u4e00\u500b\u4e0d\u5305\u542b\u91cd\u8907\u5143\u7d20\u7684\u65b0\u5217\u8868\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u4ecb\u7d39\u4e86\u5982\u4f55\u4f7f\u7528 React.JS \u5be6\u73fe React List \u7684\u53bb\u91cd(unique)\uff0c\u53ef\u4ee5\u4f7f\u7528 JavaScript \u7684 Set() \u65b9\u6cd5\u3001filter() \u65b9\u6cd5\u548c React.JS \u7684 Array.prototype.reduce() \u65b9\u6cd5\u4f86\u5be6\u73fe\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6587\u7ae0\u6458\u8981\uff1a\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528React.JS\u53bb\u91cd(unique)List\uff0c\u8b93\u4f60\u53ef\u4ee5\u5feb\u901f\u5730\u5c07\u91cd\u8907\u7684\u5143\u7d20\u5f9eList\u4e2d\u79fb\u9664\uff0c\u4e26\u66f4\u6709\u6548\u5730\u7ba1\u7406\u4f60\u7684\u8cc7\u6599\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":[184,183],"tags":[182,181],"class_list":["post-6490","post","type-post","status-publish","format-standard","hentry","category-react","category-react-js","tag-react","tag-react-js"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_shortlink":"https:\/\/wp.me\/pcFK27-1GG","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/6490","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=6490"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/6490\/revisions"}],"predecessor-version":[{"id":6491,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/6490\/revisions\/6491"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=6490"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=6490"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=6490"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}