PerCPU variables
As you learned in the previous lesson, an object stores its state in fields. int cadence = 0; int speed = 0; int gear = 1; The What Is an Object? discussion introduced you to fields, but you probably have still a few questions, such as: What are the rules and conventions for naming a field? Besides int, what other data types are there? Do fields have to be initialized when they are declared? A...
by jim153 - Java文档中心 - 2007-06-18 16:19:42 阅读（788） 回复（0）
Using variables in Asterisk Dialplans 这段时间一直研究asterisk 拨号方案，此文章对asterisk变量说的非常详细。 Asterisk can make use of global and channel-specific variables for arguments to commands. variables are referenced in the dialplan (extensions.conf) using the syntax ${foo:offset:length} where foo is the name of the variable, offset is an optional field indicating which characters sh...
[code] C:\>;mysqladmin variables +---------------------------------+---------+ | Variable_name | Value | +---------------------------------+---------+ | character_set_client | gbk | | character_set_connection | gbk | | character_set_database | gbk | | character_set_results | gbk | | character_set_server | gbk | | character_set_system |...
class ApplicationController def current_user @current_user ||= User.find(session[:user_id]) end end this piece of codes are much better than the following pieces: class ApplicationController def current_user User.find(session[:user_id]) end end Because in the first part, the searching result is saved in the instance variable, next time when get the cur...
什么是变量？ 变量是用来临时存储数值的容器。在程序中，变量存储的数值是可以变化的。 变量的声明(Declaring variables) 在使用一个变量之前，首先要声明这个变量。Javascript里，使用var来声明变量。 声明变量有以下几种 方法 ： 1. 一次声明一个变量。例句如下： var a; 2. 同时声明多个变量，变量之间用逗号相隔。例句如下： var a, b, c; 3.声明一个变量时，同时赋予变量初始值。例句如下： var a=2; 4. 同时声明多个变量，并...
好文章，不知道对今天的mysql还有用不？？借地方放一下，嘿嘿... 源 http://www.databasejournal.com/features/mysql/article.php/1402311 ---------------------------------------------- Part 1 - Compiling MySQL Like a grand prix driver starting at the back of the track, if you don't do things well from the beginning, and prepare hard for the race, it doesn't matter how well you do once the race has start...
show variables中各项的解释 这是原文，解释很详细，只是都是英文，费点劲，顺便可以锻炼一下英语水平啊。 http://dev.mysql.com/doc/refman/5.0/en/server-system-variables.html 下面是在网上摘抄的一些中文解释 Possible variables for option --set-variable (-O) are: back_log current value: 5 connect_timeout current value: 5 delayed_insert_timeout current value: 300 delayed_insert_limit c...
如 下代码 [/code] #!/bin/ksh person=(typeset firstname=John initial=Q. lastname=Public ; typeset -i age=42) print "$person" person+= (typeset spouse=Jane) print "$person"[code] 第一句print输出的内容为: [code] ( typeset -i age=42 #奇怪为什么连"typeset -i"也显示出来了???? firstname=John initial=Q. lastname=Public ) [/code] 第二句print输出的内...
假设如下类:
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在安装vcs的过程中再设置 Setting the PATH and MANPATH variables。安装指导过程有相关PATH environment的配置信息。但是我对其配置文件不是了解。不知道该如何配置如何书写。 set the PATH variable If you are using the Bourne Shell (sh or ksh), use: $ PATH=/usr/sbin:/sbin:/opt/VRTS/bin:/opt/VRTSvcs/bin:$PATH; export PATH If you are using the C Shell (csh or tcsh), use: % setenv PATH /usr/sbin:/sbin:/opt/VRT...
