{"id":4886,"date":"2023-01-05T11:13:01","date_gmt":"2023-01-05T03:13:01","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=4886"},"modified":"2023-01-05T11:13:01","modified_gmt":"2023-01-05T03:13:01","slug":"%e5%ad%b8%e7%bf%92typescript%e4%b8%ad%e5%ad%97%e4%b8%b2%e7%9a%84%e6%b1%82%e5%ad%90%e4%b8%b2stringsubstring","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/typescript\/%e5%ad%b8%e7%bf%92typescript%e4%b8%ad%e5%ad%97%e4%b8%b2%e7%9a%84%e6%b1%82%e5%ad%90%e4%b8%b2stringsubstring\/","title":{"rendered":"\u5b78\u7fd2TypeScript\u4e2d\u5b57\u4e32\u7684\u6c42\u5b50\u4e32(StringSubstring)"},"content":{"rendered":"<p><meta name=\"keywords\" content=\"TypeScript, \u5b57\u4e32, \u6c42\u5b50\u4e32, String Substring\"><\/p>\n<h1>TypeScript \u5b57\u4e32\u7684\u6c42\u5b50\u4e32(String Substring)<\/h1>\n<p>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\u5b57\u4e32\u4e5f\u662f\u4e00\u7a2e\u57fa\u672c\u985e\u578b\uff0c\u53ef\u4ee5\u4f7f\u7528\u5b57\u4e32\u7684\u6c42\u5b50\u4e32(String Substring)\u529f\u80fd\u4f86\u53d6\u5f97\u5b57\u4e32\u7684\u4e00\u90e8\u5206\u3002<\/p>\n<h2>\u5b57\u4e32\u7684\u6c42\u5b50\u4e32(String Substring)<\/h2>\n<p>\u5b57\u4e32\u7684\u6c42\u5b50\u4e32(String Substring)\u529f\u80fd\u53ef\u4ee5\u7528\u4f86\u53d6\u5f97\u5b57\u4e32\u7684\u4e00\u90e8\u5206\uff0c\u5b83\u63a5\u53d7\u5169\u500b\u53c3\u6578\uff0c\u7b2c\u4e00\u500b\u53c3\u6578\u662f\u958b\u59cb\u4f4d\u7f6e\uff0c\u7b2c\u4e8c\u500b\u53c3\u6578\u662f\u7d50\u675f\u4f4d\u7f6e\uff0c\u5b83\u6703\u8fd4\u56de\u4e00\u500b\u65b0\u7684\u5b57\u4e32\uff0c\u5176\u4e2d\u5305\u542b\u4e86\u539f\u5b57\u4e32\u4e2d\u958b\u59cb\u4f4d\u7f6e\u5230\u7d50\u675f\u4f4d\u7f6e\u4e4b\u9593\u7684\u5b57\u5143\u3002<\/p>\n<p><!--more--><\/p>\n<p>\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u5b57\u4e32 <code>str<\/code>\uff0c\u5176\u4e2d\u5305\u542b\u4e86 <code>Hello World<\/code>\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 <code>str.substring(0, 5)<\/code> \u4f86\u53d6\u5f97 <code>Hello<\/code> \u9019\u500b\u5b50\u4e32\uff1a<\/p>\n<pre><code class=\"language-typescript line-numbers\">let str = \"Hello World\";\nlet substr = str.substring(0, 5);\nconsole.log(substr); 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