camera/CameraImpl.h::: error: expansion pattern ‘Frame&’ contains no argument packs void read_frame(Frame& varg, Frame& ... args); 在尝试变长参数的时候出现如上错误.当时使用指针是没问题的,换成引用报错了. camera/CameraImpl.h:79:42: error: expansion pattern ‘Frame&’ contains…

在shell中,内建(builtin)命令read,格式如下: read [-ers] [-a aname] [-d delim] [-i text] [-n nchars] [-N nchars] [-p prompt] [-t timeout] [-u fd] [name ...]1read命令用于从标准输入或选项”-u“指定的文件描述符中读取一行文本,把第一个单词赋值给第一个名称name,第二个单词赋值给第二个名称name,以此类推,剩余的单词连同分隔符一起赋值给最后一个名称name,如果…

BASH(1) General Commands Manual BASH(1) NAME bash - GNU Bourne-Again SHell SYNOPSIS bash [options] [command_string | file] COPYRIGHT Bash is Copyright (C) 1989-2013 by the Free Software Foundation, Inc. DESCRIPTION Bash is an sh-compatible command la…

Bash Reference Manual a.summary-letter { text-decoration: none } blockquote.indentedblock { margin-right: 0 } blockquote.smallindentedblock { margin-right: 0; font-size: smaller } blockquote.smallquotation { font-size: smaller } div.display { margin-…

http://linux.about.com/library/cmd/blcmdl1_sh.htm http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html Linux / Unix Command: shCommand LibraryNAMEbash - GNU Bourne-Again SHell SYNOPSISbash [options] [file] DESCRIPTIONBash is an sh…

gdb-7.2-64.el6_5.2.x86_64/usr/bin/gcore/usr/bin/gdb/usr/bin/gdb-add-index/usr/bin/gdbtui/usr/bin/gstack/usr/bin/pstack [root@coreserv tmp]# rpm -qa|grep abrabrt-libs-2.0.8-6.el6.centos.x86_64abrt-addon-ccpp-2.0.8-6.el6.centos.x86_64abrt-2.0.8-6.el6.c…

Hyperpolyglot Unix Shells: Bash, Fish, Ksh, Tcsh, Zsh grammar | quoting and escaping | charactersvariables | variable expansion | brace, tilde, command, and pathname expansion | special variablesarithmetic and conditional expressionsarrays | associat…

3.6 Variadic Macros A macro can be declared to accept a variable number of arguments much as a function can. The syntax for defining the macro is similar to that of a function. Here is an example: #define eprintf(...) fprintf (stderr, __VA_ARGS__) Th…

(电脑已关机)电脑与交换机直连的端口状态 还是 UP ,但是 查询该端口下的 MAC地址为空. 初步怀疑原因: Wake-on-LAN(电脑关机,网卡还在工作) Wake-On-LAN简称WOL,是一种电源管理功能:如果存在网络活动,则允许设备将操作系统从待机或休眠模式中唤醒.许多主板厂商支持IBM提出的网络唤醒标准.该标准允许网络管理员远程打开PC机电源. Wake-On-LAN的实现,主要是向目标主机发送特殊格式的数据包,是AMD公司制作的MagicPacket这套软件以生成网络唤醒所需要的…

Nginx offers you the possibility to fine-tune your configuration down to three levels — at the protocollevel (http block), the serverlevel (server block), and the requested URI level (location block). Let us now detail the latter. Location Modifier N…