{"id":5212,"date":"2023-01-05T12:12:44","date_gmt":"2023-01-05T04:12:44","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=5212"},"modified":"2023-01-05T12:12:44","modified_gmt":"2023-01-05T04:12:44","slug":"%e4%ba%86%e8%a7%a3typescript%e5%ad%97%e4%b8%b2%e7%9a%84%e6%b1%82%e6%9c%80%e5%be%8c%e4%b8%80%e5%80%8b%e5%ad%97%e7%ac%a6%e4%bd%8d%e7%bd%aelastindexof%e5%8a%9f%e8%83%bd","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/typescript\/%e4%ba%86%e8%a7%a3typescript%e5%ad%97%e4%b8%b2%e7%9a%84%e6%b1%82%e6%9c%80%e5%be%8c%e4%b8%80%e5%80%8b%e5%ad%97%e7%ac%a6%e4%bd%8d%e7%bd%aelastindexof%e5%8a%9f%e8%83%bd\/","title":{"rendered":"\u4e86\u89e3TypeScript\u5b57\u4e32\u7684\u6c42\u6700\u5f8c\u4e00\u500b\u5b57\u7b26\u4f4d\u7f6e(lastIndexOf)\u529f\u80fd"},"content":{"rendered":"

<\/p>\n

TypeScript \u5b57\u4e32\u7684\u6c42\u6700\u5f8c\u4e00\u500b\u5b57\u7b26\u4f4d\u7f6e(lastIndexOf)<\/h1>\n

TypeScript \u662f\u4e00\u7a2e JavaScript \u7684\u8d85\u96c6\uff0c\u5b83\u64c1\u6709 JavaScript \u7684\u6240\u6709\u529f\u80fd\uff0c\u4e26\u4e14\u63d0\u4f9b\u4e86\u984d\u5916\u7684\u7279\u6027\uff0c\u4f8b\u5982\u985e\u578b\u6aa2\u67e5\u548c\u975c\u614b\u5206\u6790\u7b49\u3002\u5728 TypeScript \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 lastIndexOf() \u65b9\u6cd5\u4f86\u6c42\u5b57\u4e32\u7684\u6700\u5f8c\u4e00\u500b\u5b57\u7b26\u4f4d\u7f6e\u3002<\/p>\n

<\/p>\n

lastIndexOf() \u65b9\u6cd5\u6703\u5728\u4e00\u500b\u5b57\u4e32\u4e2d\u641c\u5c0b\u6307\u5b9a\u7684\u5b57\u7b26\uff0c\u4e26\u8fd4\u56de\u6700\u5f8c\u4e00\u6b21\u51fa\u73fe\u7684\u4f4d\u7f6e\u3002\u5982\u679c\u6c92\u6709\u627e\u5230\u6307\u5b9a\u7684\u5b57\u7b26\uff0c\u5247\u8fd4\u56de -1\u3002<\/p>\n

\u8209\u500b\u4f8b\u5b50\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u5b57\u4e32 “Hello World”\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 lastIndexOf() \u65b9\u6cd5\u4f86\u6c42\u51fa\u6700\u5f8c\u4e00\u500b\u5b57\u7b26 “d” \u7684\u4f4d\u7f6e\uff1a<\/p>\n

\nlet str = \"Hello World\";\nlet lastIndex = str.lastIndexOf(\"d\");\nconsole.log(lastIndex); \/\/ 10\n<\/pre>\n
\u4e0a\u9762\u7684\u7a0b\u5f0f\u78bc\u6703\u5728\u5b57\u4e32 “Hello World” \u4e2d\u641c\u5c0b\u6700\u5f8c\u4e00\u500b\u5b57\u7b26 “d”\uff0c\u4e26\u8fd4\u56de\u5b83\u7684\u4f4d\u7f6e 10\u3002<\/p>\n
\u9664\u4e86\u53ef\u4ee5\u641c\u5c0b\u55ae\u500b\u5b57\u7b26\u5916\uff0c\u6211\u5011\u9084\u53ef\u4ee5\u641c\u5c0b\u4e00\u500b\u5b57\u4e32\uff1a<\/p>\n
\nlet str = \"Hello World\";\nlet lastIndex = str.lastIndexOf(\"World\");\nconsole.log(lastIndex); \/\/ 6\n<\/pre>\n
\u4e0a\u9762\u7684\u7a0b\u5f0f\u78bc\u6703\u5728\u5b57\u4e32 “Hello World” \u4e2d\u641c\u5c0b\u5b57\u4e32 “World”\uff0c\u4e26\u8fd4\u56de\u5b83\u7684\u4f4d\u7f6e 6\u3002<\/p>\n
\u6b64\u5916\uff0c\u6211\u5011\u9084\u53ef\u4ee5\u6307\u5b9a\u641c\u5c0b\u7684\u8d77\u59cb\u4f4d\u7f6e\uff1a<\/p>\n
\nlet str = \"Hello World\";\nlet lastIndex = str.lastIndexOf(\"l\", 5);\nconsole.log(lastIndex); \/\/ 3\n<\/pre>\n
\u4e0a\u9762\u7684\u7a0b\u5f0f\u78bc\u6703\u5728\u5b57\u4e32 “Hello World” \u4e2d\u641c\u5c0b\u5b57\u7b26 “l”\uff0c\u4e26\u5f9e\u4f4d\u7f6e 5 \u958b\u59cb\u641c\u5c0b\uff0c\u6700\u5f8c\u8fd4\u56de\u5b83\u7684\u4f4d\u7f6e 3\u3002<\/p>\n
\u7e3d\u7d50\uff0cTypeScript \u4e2d\u7684 lastIndexOf() \u65b9\u6cd5\u53ef\u4ee5\u7528\u4f86\u6c42\u5b57\u4e32\u7684\u6700\u5f8c\u4e00\u500b\u5b57\u7b26\u4f4d\u7f6e\uff0c\u5b83\u53ef\u4ee5\u641c\u5c0b\u55ae\u500b\u5b57\u7b26\u6216\u5b57\u4e32\uff0c\u4e26\u53ef\u4ee5\u6307\u5b9a\u641c\u5c0b\u7684\u8d77\u59cb\u4f4d\u7f6e\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6587\u7ae0\u6458\u8981(Description):TypeScript\u63d0\u4f9b\u4e86\u4e00\u500blastIndexOf()\u51fd\u6578\uff0c\u53ef\u4ee5\u7528\u4f86\u6c42\u5b57\u4e32\u4e2d\u6700\u5f8c\u4e00\u500b\u5b57\u7b26\u7684\u4f4d\u7f6e\uff0c\u672c\u6587\u5c07\u4ecb\u7d39lastIndexOf()\u51fd\u6578\u7684\u4f7f\u7528\u65b9\u6cd5\uff0c\u4ee5\u53ca\u5982\u4f55\u5229\u7528\u5b83\u4f86\u8655\u7406\u5b57\u4e32\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-5212","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\/pcFK27-1m4","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5212","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=5212"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5212\/revisions"}],"predecessor-version":[{"id":5213,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5212\/revisions\/5213"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=5212"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=5212"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=5212"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}