prefix | 易学教程

log4j2使用整理

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 关键概念 LoggerConfig: 日志配置, 用于整合多个 Appender, 进行日志打印. Appender: 追加器, 用于操作 Layout 和 Manager, 往单一目的地进行日志打印. Layout: 布局, 用于把 LogEvent 日志事件序列化成字节序列, 不同 Layout 实现具有不同的序列化方式. Manager: 管理器, 用于管理输出目的地, 如: RollingFileManager 用于管理文件滚动以及将字节序列写入到指定文件中 Filter: 过滤器, 用于对 LogEvent 日志事件加以过滤, LoggerConfig 和 Appender 都可以配置过滤器, 也就是说日志事件会经过一总一分两层过滤. 日志等级 FATAL > ERROR > WARN > INFO > DEBUG > TRACE > ALL Configuration status="OFF"：这个status配置的是，Log4j2 组件本身日志级别，指的是如果 Log4j2 本身出错，打印出的日志级别配置。日志名称、继承体系名称和继承体系 Logger中存在与JAVA体系类似的继承关系,Logger中的超类是RootLogger，它是所有Logger的父类 Logger的继承关系是通过**名称

Remove “d1p1” namespace prefix in DataContractSerializer XML output

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问题 I'm using DatacontractSerializer to serialize my domainModel into a xml file. I'm getting output like below. <z:anyType xmlns:i="http://www.w3.org/2001/XMLSchema-instance" z:Id="1" xmlns:d1p1="DCSerialization_IGITApproach" i:type="d1p1:X" xmlns:z="http://schemas.microsoft.com/2003/10/Serialization/"> <d1p1:Name z:Id="2">Ankit</d1p1:Name> <d1p1:PointsDictionary xmlns:d2p1="http://schemas.microsoft.com/2003/10/Serialization/Arrays" z:Id="3" z:Size="1"> <d2p1:KeyValueOfstringPointsArrayq9VX7VJJ>

centos7上安装mediawiki

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为了记录遇到过的坑，这里是基于 Apache2服务器 1、安装 apr-1.7.0 wget http://mirrors.tuna.tsinghua.edu.cn/apache//apr/apr-1.7.0.tar.gz tar xvf apr-1.7.0.tar.gz cd apr-1.7.0 ./configure --prefix=/usr/local/apr make && make install 2、安装apr-util-1.6.1 wget http://mirrors.tuna.tsinghua.edu.cn/apache//apr/apr-util-1.6.1.tar.gz tar xvf apr-util-1.6.1.tar.gz cd apr-util-1.6.1 ./configure --prefix=/usr/local/apr-util --with-apr=/usr/local/apr/bin/apr-1-config make && make install 3、安装pcre-8.43 wget https://sourceforge.net/projects/pcre/files/pcre/8.43/pcre-8.43.tar.gz tar zxvf pcre-8.43.tar.gz cd pcre ./configure --prefix=

pytorch中Module模块中named_parameters函数

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函数named_parameters()，返回各层中参数名称和数据 class MLP ( nn . Module ) : def __init__ ( self ) : super ( MLP , self ) . __init__ ( ) self . hidden = nn . Sequential ( nn . Linear ( 256 , 64 ) , nn . ReLU ( inplace = True ) , nn . Linear ( 64 , 10 ) ) def forward ( self , x ) : return self . hidden ( x ) #x = torch.randperm(256*2).view(-1,256) net = MLP ( ) net ( x . float ( ) ) #随机输出结果 tensor ( [ [ 73.2550 , - 51.5631 , 4.3549 , 19.0657 , - 55.6626 , - 80.8340 , - 21.1650 , 93.4071 , - 9.8959 , - 49.4214 ] , [ 39.6934 , - 2.6528 , 63.8478 , - 5.0462 , - 83.4204 , - 128.7376 , 72.5279 , 3.0522 , 77.3654 ,

C++ Iterator dereference and prefix increment/decrement style? Is *--Iter ok style wise?

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问题 In coding with C++ iterators if you wanted to get the previous value to what an iterator points to would you write: *--Iter or would you think it better to add parentheses like so: *(--Iter) ? 回答1: It doesn't matter as far as program correctness is concerned. But I always express this as *(--Iter) because this is more self-documenting and easier to understand to human beings than *--Iter . 回答2: I would use the latter for clarity, but both are completely valid and equivalent. Note: In case

Default values for CMAKE_FIND_LIBRARY_PREFIXES/CMAKE_FIND_LIBRARY_SUFFIXES

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问题 i guess i'm missing something very obvious here, but it seems to me that the cmake variables CMAKE_FIND_LIBRARY_PREFIXES/CMAKE_FIND_LIBRARY_SUFFIXES are not set to any "decent" default value depending on the current system/settings! i've checked the cmake docs and google, but there seems nothing about it really. for example, a simple CMakeLists.txt essentially calling find_package(OpenSSL REQUIRED) will break unless you set the variables in your main file or directly invoke cmake -DCMAKE_FIND

Default values for CMAKE_FIND_LIBRARY_PREFIXES/CMAKE_FIND_LIBRARY_SUFFIXES

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How to accurately display SI prefix for numbers in y-axis scale of plot made with ggplot2 in R?

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问题 I have the following plot, generated using this code plt <- ggplot(d2, aes_string(x=names(same_df)[1],y= "value")) + geom_point(aes(color = variable), size = 1)+ theme_bw()+ theme(legend.text=element_text(size=14), legend.title=element_text(size=14))+ theme(axis.text=element_text(size=20)) + theme(axis.title=element_text(size=20,face="bold")) + scale_color_discrete(name = "title", labels = c("1", "2", "3", "4","5","6","7","8","9")) + labs(x = "x", y = "y")+ guides(colour = guide_legend

What is $(prefix) on $(prefix)/etc/gitconfig?

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问题 gitconfig(1): If not set explicitly with --file, there are four files where git config will search for configuration options: ... $(prefix) /etc/gitconfig System-wide configuration file. What is $(prefix) on $(prefix)/etc/gitconfig ? 回答1: The prefix environment variable git was compiled with. Usually, it's empty, so the path is /etc/gitconfig . 来源： https://stackoverflow.com/questions/19713622/what-is-prefix-on-prefix-etc-gitconfig

lamp源码搭建

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准备环境一台centos6.5 准备源码包 wget http://ftp.cuhk.edu.hk/pub/packages/apache.org//httpd/httpd-2.4.16.tar.gz wget http://bg2.php.net/distributions/php-5.6.12.tar.gz wget http://cdn.mysql.com/Downloads/MySQL-5.6/mysql-5.6.26.tar.gz 源码安装Apache 1解决依赖关系 http需要apr和apr-util (1) 编译安装apr wget http://apache.01link.hk/apr/apr-1.5.2.tar.gz # tar -xvf apr-1.5.2.tar.gz # cd apr-1.5.2 # ./configure --prefix=/usr/local/apr # make && make install (2) 编译安装apr-util wget http://apache.01link.hk/apr/apr-util-1.5.4.tar.gz # tar -xvf apr-util-1.5.4.tar.gz # cd apr-util-1.5.4 # ./configure --prefix=/usr/local/apr-util -