https://blog.youkuaiyun.com/dby0222zh-cnhttps://blog.youkuaiyun.com/https://blog.youkuaiyun.com/dby0222/article/details/164617350https://blog.youkuaiyun.com/dby0222/article/details/164617350dby0222Tue, 08 Sep 2026 15:34:28 +0800https://blog.youkuaiyun.com/dby0222/article/details/164465076https://blog.youkuaiyun.com/dby0222/article/details/164465076dby0222Mon, 07 Sep 2026 15:55:14 +0800https://blog.youkuaiyun.com/dby0222/article/details/164334090https://blog.youkuaiyun.com/dby0222/article/details/164334090dby0222Thu, 03 Sep 2026 15:58:44 +0800https://blog.youkuaiyun.com/dby0222/article/details/164297705https://blog.youkuaiyun.com/dby0222/article/details/164297705dby0222Wed, 02 Sep 2026 15:41:07 +0800https://blog.youkuaiyun.com/dby0222/article/details/164261440https://blog.youkuaiyun.com/dby0222/article/details/164261440dby0222Tue, 01 Sep 2026 15:26:39 +0800https://blog.youkuaiyun.com/dby0222/article/details/164221548https://blog.youkuaiyun.com/dby0222/article/details/164221548dby0222Mon, 31 Aug 2026 16:35:10 +0800 target 时，right = mid - 1（mid 已经检查过，排除）选择合适的数据结构，可以极大地提升算法的效率。当 nums[mid] > target 时，right = mid（右开边界，mid 不包含）区间：[4, 6)，mid = 5，nums[5]=12 > 9 → right = 5。初始：[0, 5]，mid = 2，nums[2]=3 < 9 → left = 3。初始：[0, 6)，mid = 3，nums[3]=5 < 9 → left = 4。]]>https://blog.youkuaiyun.com/dby0222/article/details/162765823https://blog.youkuaiyun.com/dby0222/article/details/162765823dby0222Sun, 12 Jul 2026 21:52:39 +0800和<在方括号中必须转义（\>、\<），否则会被当作重定向符号。echo "========== 系统检查工具 =========="· if后面的命令退出状态码为0（成功）时，then后的命令才执行。test命令允许测试命令退出码之外的条件，包括数值、字符串和文件。echo "========== 检查完成 =========="echo "可读，共 $line 行"echo "$target_file 不存在"]]>https://blog.youkuaiyun.com/dby0222/article/details/162765176https://blog.youkuaiyun.com/dby0222/article/details/162765176dby0222Fri, 10 Jul 2026 15:42:59 +0800https://blog.youkuaiyun.com/dby0222/article/details/162698504https://blog.youkuaiyun.com/dby0222/article/details/162698504dby0222Thu, 09 Jul 2026 15:08:19 +0800https://blog.youkuaiyun.com/dby0222/article/details/162666431https://blog.youkuaiyun.com/dby0222/article/details/162666431dby0222Wed, 08 Jul 2026 14:41:11 +0800https://blog.youkuaiyun.com/dby0222/article/details/162638111https://blog.youkuaiyun.com/dby0222/article/details/162638111dby0222Tue, 07 Jul 2026 14:48:54 +0800https://blog.youkuaiyun.com/dby0222/article/details/162635515https://blog.youkuaiyun.com/dby0222/article/details/162635515dby0222Mon, 06 Jul 2026 16:16:16 +0800https://blog.youkuaiyun.com/dby0222/article/details/162552551https://blog.youkuaiyun.com/dby0222/article/details/162552551dby0222Fri, 03 Jul 2026 17:02:42 +0800https://blog.youkuaiyun.com/dby0222/article/details/162551318https://blog.youkuaiyun.com/dby0222/article/details/162551318dby0222Fri, 03 Jul 2026 14:31:46 +0800https://blog.youkuaiyun.com/dby0222/article/details/162522225https://blog.youkuaiyun.com/dby0222/article/details/162522225dby0222Thu, 02 Jul 2026 15:35:29 +0800https://blog.youkuaiyun.com/dby0222/article/details/162520757https://blog.youkuaiyun.com/dby0222/article/details/162520757dby0222Thu, 02 Jul 2026 15:00:43 +0800