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PHP去除字符串中的最后一个字符 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...substr — 返回字符串的子串 string substr ( string $string , int $start [, int $length ] ) 返回字符串 string 由 start 和 length 参数指定的子字符串。 strlen — 获取字符串长度 int strlen ( string $string ) 返回给定的字符串 string 的长度。 PHP ...
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今天开始应该使用 5 个JavaScript调试技巧 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...个JavaScript调试技巧原文:5 Javascript debugging tips you’ll start using today我之前使用过用printf debugging,自此之后我用这种方法似乎总...原文:5 Javascript debugging tips you’ll start using today 我之前使用过用 printf debugging,自此之后我...
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PHP中的错误处理 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...不是,我们不仅有办法,而且还有好几种: 第一种:ob_start + error_get_last <?php ob_start(function($buffer) { if ($error = error_get_last()) { return var_export($error, true); } return $buffer; }); // Fatal error: Call to undefined function u...
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Outlook 开机自动启动 - 更多技术 - 清泛网 - 专注C/C++及内核技术

... -> 启动Win10下:C: Users xxx AppData Roaming Microsoft Windows Start Me...把Outlook快捷方式拷贝到启动文件夹中即可。 Win7:开始菜单 -> 启动 Win10下: C:\Users\xxx\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup (红色部分请自行...
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win10 启动文件夹在哪? - 更多技术 - 清泛网 - 专注C/C++及内核技术

...单中是没有的。C: Users xxx AppData Roaming Microsoft Windows Start Menu Programs...Win7 启动在开始菜单中,很方便,不过Win10的开始菜单中是没有的。 C:\Users\xxx\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup (红色部分请自行调整...
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Linux C/C++进程单实例互斥代码分享 - C/C++ - 清泛网 - 专注C/C++及内核技术

...锁定 struct flock fl; fl.l_type = F_WRLCK; // 写文件锁定 fl.l_start = 0; fl.l_whence = SEEK_SET; fl.l_len = 0; int ret = fcntl(fd, F_SETLK, &fl); if (ret < 0) { if (errno == EACCES || errno == EAGAIN) { printf("%s already locked, error: %s\n", kPidFileName, strerror(errno...
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【解决】Linux mysql如何重置root密码? - 更多技术 - 清泛网 - 专注C/C++及内核技术

...min -u root -p shutdown 启动mysql数据库: [root@z ~]# systemctl start mysql (或者)启动MariaDB数据库 [root@z ~]# systemctl start mariadb 8. 验证新密码 输入以下命令,验证刚刚设置的新密码: [root@z ~]# mysql -u root -p 提示你需要输入刚刚设...
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Using the “animated circle” in an ImageView while loading stuff

...eat insight into how Threads and Handlers can work together. I'll get you started on how this works: The loading event starts the dialog: //maybe in onCreate showDialog(MY_LOADING_DIALOG); fooThread = new FooThread(handler); fooThread.start(); Now the thread does the work: private class FooThr...
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Why are elementwise additions much faster in separate loops than in a combined loop?

...lt;&lt; c1 &lt;&lt; endl; cout &lt;&lt; d1 &lt;&lt; endl; clock_t start = clock(); int c = 0; while (c++ &lt; 10000){ #if ONE_LOOP for(int j=0;j&lt;n;j++){ a1[j] += b1[j]; c1[j] += d1[j]; } #else for(int j=0;j&lt;n;j++){ ...
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What do numbers using 0x notation mean?

... Literals that start with 0x are hexadecimal integers. (base 16) The number 0x6400 is 25600. 6 * 16^3 + 4 * 16^2 = 25600 For an example including letters (also used in hexadecimal notation where A = 10, B = 11 ... F = 15) The number 0x...