{"id":5629,"date":"2023-01-06T10:58:05","date_gmt":"2023-01-06T02:58:05","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=5629"},"modified":"2023-01-06T10:58:05","modified_gmt":"2023-01-06T02:58:05","slug":"%e5%ad%b8%e7%bf%92%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8react-js%e6%b1%82%e5%ad%97%e7%ac%a6%e4%b8%b2%e5%87%ba%e7%8f%be%e6%ac%a1%e6%95%b8countoccurrences","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/react-js\/%e5%ad%b8%e7%bf%92%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8react-js%e6%b1%82%e5%ad%97%e7%ac%a6%e4%b8%b2%e5%87%ba%e7%8f%be%e6%ac%a1%e6%95%b8countoccurrences\/","title":{"rendered":"\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528React.JS\u6c42\u5b57\u7b26\u4e32\u51fa\u73fe\u6b21\u6578(countOccurrences)"},"content":{"rendered":"

<\/p>\n

\u5982\u4f55\u4f7f\u7528 React.JS \u4f86\u6c42\u5b57\u7b26\u4e32\u51fa\u73fe\u6b21\u6578(countOccurrences)<\/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\u672c\u6587\u4e2d\uff0c\u6211\u5011\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528 React.JS \u4f86\u6c42\u5b57\u7b26\u4e32\u51fa\u73fe\u6b21\u6578(countOccurrences)\u3002<\/p>\n

\u4ec0\u9ebc\u662f countOccurrences\uff1f<\/h2>\n

countOccurrences \u662f\u4e00\u500b\u51fd\u6578\uff0c\u5b83\u53ef\u4ee5\u7528\u65bc\u7d71\u8a08\u5b57\u7b26\u4e32\u4e2d\u67d0\u500b\u5b57\u7b26\u51fa\u73fe\u7684\u6b21\u6578\u3002\u5b83\u53ef\u4ee5\u7528\u65bc\u6aa2\u67e5\u5b57\u7b26\u4e32\u4e2d\u662f\u5426\u6709\u91cd\u8907\u7684\u5b57\u7b26\uff0c\u6216\u8005\u6aa2\u67e5\u5b57\u7b26\u4e32\u4e2d\u67d0\u500b\u5b57\u7b26\u51fa\u73fe\u7684\u6b21\u6578\u3002<\/p>\n

\u5982\u4f55\u4f7f\u7528 React.JS \u4f86\u6c42\u5b57\u7b26\u4e32\u51fa\u73fe\u6b21\u6578\uff1f<\/h2>\n

\u4f7f\u7528 React.JS \u4f86\u6c42\u5b57\u7b26\u4e32\u51fa\u73fe\u6b21\u6578\u975e\u5e38\u7c21\u55ae\uff0c\u53ea\u9700\u8981\u4f7f\u7528 String.prototype.match()<\/code> \u65b9\u6cd5\u4f86\u6c42\u51fa\u5b57\u7b26\u4e32\u4e2d\u67d0\u500b\u5b57\u7b26\u51fa\u73fe\u7684\u6b21\u6578\u3002<\/p>\n

\n\/\/ \u5b9a\u7fa9\u4e00\u500b\u5b57\u7b26\u4e32\nconst str = 'React.JS is a JavaScript library for building user interfaces';\n\n\/\/ \u4f7f\u7528 match() \u65b9\u6cd5\u4f86\u6c42\u51fa\u5b57\u7b26\u4e32\u4e2d\u67d0\u500b\u5b57\u7b26\u51fa\u73fe\u7684\u6b21\u6578\nconst count = str.match(\/a\/g).length;\n\n\/\/ \u8f38\u51fa\u7d50\u679c\nconsole.log(count); \/\/ 3\n<\/pre>\n
\u4e0a\u9762\u7684\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u6211\u5011\u4f7f\u7528 String.prototype.match()<\/code> \u65b9\u6cd5\u4f86\u6c42\u51fa\u5b57\u7b26\u4e32\u4e2d\u67d0\u500b\u5b57\u7b26\u51fa\u73fe\u7684\u6b21\u6578\uff0c\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u6c42\u51fa\u5b57\u7b26\u4e32\u4e2d a<\/code> \u5b57\u7b26\u51fa\u73fe\u7684\u6b21\u6578\uff0c\u7d50\u679c\u70ba 3<\/code>\u3002<\/p>\n
<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u4ecb\u7d39\u4e86\u5982\u4f55\u4f7f\u7528 React.JS \u4f86\u6c42\u5b57\u7b26\u4e32\u51fa\u73fe\u6b21\u6578(countOccurrences)\u3002\u6211\u5011\u4f7f\u7528 String.prototype.match()<\/code> \u65b9\u6cd5\u4f86\u6c42\u51fa\u5b57\u7b26\u4e32\u4e2d\u67d0\u500b\u5b57\u7b26\u51fa\u73fe\u7684\u6b21\u6578\uff0c\u9019\u662f\u4e00\u500b\u975e\u5e38\u7c21\u55ae\u800c\u6709\u6548\u7684\u65b9\u6cd5\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6587\u7ae0\u6458\u8981\uff1a\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528React.JS\u4e2d\u7684countOccurrences\u51fd\u6578\u4f86\u6c42\u5b57\u7b26\u4e32\u51fa\u73fe\u6b21\u6578\uff0c\u8b93\u4f60\u53ef\u4ee5\u66f4\u8f15\u9b06\u5730\u7ba1\u7406\u5b57\u7b26\u4e32\uff0c\u4e26\u66f4\u6709\u6548\u5730\u4f7f\u7528\u5b83\u5011\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-5629","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\/pcFK27-1sN","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5629","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=5629"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5629\/revisions"}],"predecessor-version":[{"id":5630,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5629\/revisions\/5630"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=5629"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=5629"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=5629"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}