{"id":207011,"date":"2025-07-08T09:22:56","date_gmt":"2025-07-08T01:22:56","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207011\/"},"modified":"2025-07-08T09:22:56","modified_gmt":"2025-07-08T01:22:56","slug":"%e5%a6%82%e4%bd%95%e5%b0%86%e5%ad%97%e7%ac%a6%e4%b8%b2%e7%9a%84-charatindex-%e8%bd%ac%e6%8d%a2%e4%b8%ba-ascii-%e7%ad%89%e6%95%88-int-%e5%80%bc","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207011\/","title":{"rendered":"\u5982\u4f55\u5c06\u5b57\u7b26\u4e32\u7684 charAtIndex \u8f6c\u6362\u4e3a ASCII \u7b49\u6548 int \u503c"},"content":{"rendered":"<p><b><\/b> <\/p>\n<p>\u5f53\u524d\u4f4d\u7f6e\uff1a <span>&gt;<\/span> <span>&gt;<\/span> <span>&gt;<\/span> <span>&gt;<\/span> <span>\u5982\u4f55\u5c06\u5b57\u7b26\u4e32\u7684 charAtIndex \u8f6c\u6362\u4e3a ASCII \u7b49\u6548 int \u503c<\/span><\/p>\n<p><span>\u6765\u6e90\uff1astackoverflow<\/span><br \/>\n<span>2024-04-19 14:45:34<\/span><br \/>\n<span><i><\/i>0\u6d4f\u89c8<\/span><br \/>\n<span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u4eca\u5929\u5c06\u7ed9\u5927\u5bb6\u5e26\u6765<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300a\u5982\u4f55\u5c06\u5b57\u7b26\u4e32\u7684 charAtIndex \u8f6c\u6362\u4e3a ASCII \u7b49\u6548 int \u503c\u300b<\/span>\uff0c\u611f\u5174\u8da3\u7684\u670b\u53cb\u8bf7\u7ee7\u7eed\u770b\u4e0b\u53bb\u5427\uff01\u4ee5\u4e0b\u5185\u5bb9\u5c06\u4f1a\u6d89\u53ca\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u662f\u6b63\u5728\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">Golang<\/span>\u6216\u8005\u5df2\u7ecf\u662f\u5927\u4f6c\u7ea7\u522b\u4e86\uff0c\u90fd\u975e\u5e38\u6b22\u8fce\u4e5f\u5e0c\u671b\u5927\u5bb6\u90fd\u80fd\u7ed9\u6211\u5efa\u8bae\u8bc4\u8bba\u54c8~\u5e0c\u671b\u80fd\u5e2e\u52a9\u5230\u5927\u5bb6\uff01<\/p>\n<p> \u95ee\u9898\u5185\u5bb9<br \/>\n <\/p>\n<p>\u6211\u6709\u4e00\u7ec4\u5b57\u7b26\u4e32 (ascii)\uff0c\u6211\u60f3\u5c06\u5176\u5206\u914d\u7ed9\u4e00\u4e2a\u5b57\u7b26\u4e32\u6570\u7ec4\uff08\u7b2c 128 \u7ae0\uff09\u3002 \u5b57\u7b26\u4e32\u5728\u6570\u7ec4\u4e2d\u7684\u4f4d\u7f6e\u7531\u5b57\u7b26\u4e32\u7b2c\u4e00\u4e2a\u5b57\u7b26\u7684 ascii \u503c\u51b3\u5b9a\u3002 \u5c31\u50cf..<\/p>\n<pre>strarr := [128]string{}\nstra := \"a string\"\nstrb := \"b string\"\nstrarr[65] = stra \/\/ since stra started with 'a' &amp; ascii('a') = 65\nstrarr[66] = strb \/\/ since strb started with 'b' &amp; ascii('b') = 66\n<\/pre>\n<p>\u6709\u4e00\u79cd\u4f7f\u7528 <code>utf8<\/code> \u5305\u7684\u89e3\u51b3\u65b9\u6848\uff0c\u4f8b\u5982&#8230;<\/p>\n<pre>r, _ := utf8.DecodeRuneInString(strA)\nstrArr[r] = strA\n<\/pre>\n<h2>\u662f\u5426\u53ef\u4ee5\u5bf9\u8fd9\u4e2a\u89e3\u51b3\u65b9\u6848\u8fdb\u884c\u65f6\u95f4\u4f18\u5316\uff1f<\/h2>\n<p> <\/p>\n<h2>\u89e3\u51b3\u65b9\u6848<\/h2>\n<p> <\/p>\n<p>\u5982\u679c\u60a8\u53ef\u4ee5\u786e\u5b9a\u60a8\u7684\u5b57\u7b26\u4e32\u4e0d\u4e3a\u7a7a\u5e76\u4e14\u5b83\u4eec\u7684\u7b2c\u4e00\u4e2a\u7b26\u6587\u5728 <code>0..127<\/code> \u7684\u8303\u56f4\u5185\uff0c\u60a8\u53ef\u4ee5\u7b80\u5355\u5730\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\uff1a<\/p>\n<pre>strarr[stra[0]] = stra\nstrarr[strb[0]] = strb<\/pre>\n<p>\u56e0\u4e3a\u7d22\u5f15\u5b57\u7b26\u4e32\u7d22\u5f15\u5b83\u4eec\u7684utf-8\u7f16\u7801\u5b57\u8282\uff08\u8fd9\u5c31\u662fgo\u5728\u5185\u5b58\u4e2d\u5b58\u50a8\u5b57\u7b26\u4e32\u7684\u65b9\u5f0f\uff09\uff0c\u5e76\u4e14<code>0..127<\/code>\u8303\u56f4\u5185\u7684\u7b26\u6587\u6620\u5c04\u5230\u5b57\u82821\u52301\uff0c\u6240\u4ee5\u7b2c\u4e00\u4e2a\u5b57\u8282\u662f\u503c\u7b2c\u4e00\u4e2a <code>rune<\/code>\u3002<\/p>\n<p>\u5f53\u7136\uff0c\u5982\u679c <code>stra<\/code> \u6216 <code>strb<\/code> \u4e3a\u7a7a\u6216\u8005\u5b83\u4eec\u7684\u7b2c\u4e00\u4e2a\u7b26\u6587\u4e0d\u5728 <code>0..127<\/code> \u8303\u56f4\u5185\uff0c\u5219\u4e0a\u8ff0\u4ee3\u7801\u5c06\u4f1a\u51fa\u73b0\u6df7\u4e71\u3002<\/p>\n<p>\u60a8\u53ef\u4ee5\u901a\u8fc7\u68c0\u67e5\u5b57\u7b26\u4e32\u53ca\u5176\u4e4b\u524d\u7684\u7b2c\u4e00\u4e2a\u5b57\u8282\u6765\u907f\u514d\u6050\u614c\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre>func set(s string) {\n    if s == \"\" || s[0] &gt; 127 {\n        return\n    }\n    strarr[s[0]] = s\n}<\/pre>\n<p>\u6b64 <code>set()<\/code> \u51fd\u6570\u5bf9 <code>s<\/code> \u5b57\u7b26\u4e32\u8fdb\u884c\u4e24\u6b21\u7d22\u5f15\uff08\u7b2c\u4e00\u6b21\u662f\u5728\u68c0\u67e5\u7b2c\u4e00\u4e2a\u7b26\u6587\/\u5b57\u8282\u662f\u5426\u5728\u6709\u6548\u8303\u56f4\u5185\u65f6\uff0c\u7b2c\u4e8c\u6b21\u662f\u5728\u7d22\u5f15 <code>strarr<\/code> \u65f6\uff09\u3002\u6211\u4eec\u53ef\u4ee5\u5b58\u50a8\u7b2c\u4e00\u4e2a\u7d22\u5f15\u7684\u7ed3\u679c\u5e76\u5728\u7b2c\u4e8c\u79cd\u60c5\u51b5\u4e0b\u91cd\u7528\u8be5\u7ed3\u679c\uff0c\u8fd9\u53ef\u80fd\u4f1a\u4e5f\u53ef\u80fd\u4e0d\u4f1a\u63d0\u9ad8\u6027\u80fd\uff1a<\/p>\n<pre>func set2(s string) {\n    if s != \"\" {\n        return\n    }\n    if first := s[0]; first &lt;= 127 {\n        strArr[first] = s\n    }\n}<\/pre>\n<p>\u5c1d\u8bd5 \u4e0a\u7684\u793a\u4f8b\u3002<\/p>\n<p>\u4eca\u5929\u5173\u4e8e\u300a\u5982\u4f55\u5c06\u5b57\u7b26\u4e32\u7684 charAtIndex \u8f6c\u6362\u4e3a ASCII \u7b49\u6548 int \u503c\u300b\u7684\u5185\u5bb9\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\uff0c\u5982\u679c\u6709\u4ec0\u4e48\u7591\u95ee\u6216\u8005\u5efa\u8bae\uff0c\u53ef\u4ee5\u5728\u516c\u4f17\u53f7\u4e0b\u591a\u591a\u56de\u590d\u4ea4\u6d41\uff1b\u6587\u4e2d\u82e5\u6709\u4e0d\u6b63\u4e4b\u5904\uff0c\u4e5f\u5e0c\u671b\u56de\u590d\u7559\u8a00\u4ee5\u544a\u77e5\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5f53\u524d\u4f4d\u7f6e\uff1a &gt; &gt; &#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-207011","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207011","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=207011"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207011\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207011"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207011"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207011"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}