{"id":5691,"date":"2023-01-06T14:38:52","date_gmt":"2023-01-06T06:38:52","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=5691"},"modified":"2023-01-06T14:38:52","modified_gmt":"2023-01-06T06:38:52","slug":"%e5%a6%82%e4%bd%95%e5%88%a9%e7%94%a8react-js%e5%8e%bb%e9%87%8duniquelist","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\/","title":{"rendered":"\u5982\u4f55\u5229\u7528React.JS\u53bb\u91cd(unique)List"},"content":{"rendered":"<p><meta name=\"keywords\" content=\"React, React List, Unique\"><\/p>\n<h1>\u5982\u4f55\u4f7f\u7528 React.JS \u505a\u51fa React List \u7684\u53bb\u91cd(unique)<\/h1>\n<p>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\u5bb9\u6613\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\u60f3\u8981\u5c07\u91cd\u8907\u7684\u9805\u76ee\u53bb\u91cd\uff0c\u53ef\u4ee5\u4f7f\u7528 unique \u529f\u80fd\u3002<\/p>\n<p><!--more--><\/p>\n<p>\u5728 React.JS \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>Array.prototype.filter()<\/code> \u65b9\u6cd5\u4f86\u5be6\u73fe\u53bb\u91cd\u529f\u80fd\u3002<code>Array.prototype.filter()<\/code> \u65b9\u6cd5\u6703\u63a5\u53d7\u4e00\u500b\u51fd\u6578\u4f5c\u70ba\u53c3\u6578\uff0c\u4e26\u5c07\u51fd\u6578\u7684\u8fd4\u56de\u503c\u70ba true \u7684\u9805\u76ee\u4fdd\u7559\u4e0b\u4f86\uff0c\u5176\u4ed6\u7684\u9805\u76ee\u5247\u6703\u88ab\u79fb\u9664\u3002<\/p>\n<p>\u70ba\u4e86\u5be6\u73fe\u53bb\u91cd\u529f\u80fd\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>Set<\/code> \u4f86\u5275\u5efa\u4e00\u500b\u4e0d\u5305\u542b\u91cd\u8907\u9805\u76ee\u7684\u96c6\u5408\uff0c\u7136\u5f8c\u5c07 <code>Set<\/code> \u8f49\u63db\u70ba\u6578\u7d44\uff0c\u5c31\u53ef\u4ee5\u5f97\u5230\u4e00\u500b\u4e0d\u5305\u542b\u91cd\u8907\u9805\u76ee\u7684\u6578\u7d44\u4e86\u3002<\/p>\n<p>\u4e0b\u9762\u662f\u4e00\u500b\u793a\u4f8b\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528 <code>Array.prototype.filter()<\/code> \u548c <code>Set<\/code> \u4f86\u5be6\u73fe React List \u7684\u53bb\u91cd\u529f\u80fd\uff1a<\/p>\n<pre class=\"brush: javascript\">\nconst list = [1, 2, 3, 4, 5, 5, 6, 7, 8, 8, 9];\n\n\/\/ \u4f7f\u7528 Set \u5275\u5efa\u4e00\u500b\u4e0d\u5305\u542b\u91cd\u8907\u9805\u76ee\u7684\u96c6\u5408\nconst uniqueList = new Set(list);\n\n\/\/ \u5c07 Set \u8f49\u63db\u70ba\u6578\u7d44\nconst uniqueArray = Array.from(uniqueList);\n\n\/\/ \u4f7f\u7528 Array.prototype.filter() \u65b9\u6cd5\u5c07\u91cd\u8907\u7684\u9805\u76ee\u79fb\u9664\nconst filteredArray = uniqueArray.filter(item => list.indexOf(item) !== -1);\n\nconsole.log(filteredArray); \/\/ [1, 2, 3, 4, 5, 6, 7, 8, 9]\n<\/pre>\n<p>\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u4f7f\u7528 <code>Array.prototype.filter()<\/code> \u65b9\u6cd5\u5c07\u91cd\u8907\u7684\u9805\u76ee\u79fb\u9664\uff0c\u4e26\u5c07\u7d50\u679c\u4fdd\u5b58\u5230 <code>filteredArray<\/code> \u4e2d\u3002<\/p>\n<p>\u7e3d\u7d50\uff0c\u4f7f\u7528 <code>Array.prototype.filter()<\/code> \u548c <code>Set<\/code> \u4f86\u5be6\u73fe React List \u7684\u53bb\u91cd\u529f\u80fd\u662f\u4e00\u500b\u975e\u5e38\u7c21\u55ae\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u66f4\u5bb9\u6613\u5730\u69cb\u5efa\u9ad8\u6027\u80fd\u7684\u7db2\u9801\u61c9\u7528\u7a0b\u5e8f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6458\u8981\uff1a\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528React.JS\u53bb\u91cd(unique)List\uff0c\u8b93\u958b\u767c\u8005\u53ef\u4ee5\u5feb\u901f\u6709\u6548\u5730\u5c07\u91cd\u8907\u7684\u5143\u7d20\u5f9eList\u4e2d\u79fb\u9664\uff0c\u4ee5\u63d0\u9ad8\u958b\u767c\u6548\u7387\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-5691","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\/pcFK27-1tN","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5691","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=5691"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5691\/revisions"}],"predecessor-version":[{"id":5692,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5691\/revisions\/5692"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=5691"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=5691"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=5691"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}