alias

Up until now I have only used database.yml with each parameter called out explicitly, in the file below it uses some characters I do not understand. What does each line and symbol(&,*,<<) mean, how do i read this file? development: &default adapter: postgresql database: dev_development test: &test <<: *default database: test_test cucumber: <<: *test production: <<: *default database: test_production The & marks an alias for the node (in your example &default aliases the development node as "default") and the * references the aliased node with the name "default". The <<: inserts the content of

I would like to know how to do set-alias in PowerShell for the cmd used in developing Firefox extension: cfx run -p C:\Users\username\AppData\Roaming\Mozilla\Firefox\Profiles\ripltbxm.cfxp I've added the following to Microsoft.PowerShell_profile.ps1: Set-Alias cfxp cfx run -p "C:\Users\username\AppData\Roaming\Mozilla\Firefox\Profiles\ripltbxm.cfxp" But when PowerShell is launched, it shows the error: Set-Alias : A positional parameter cannot be found that accepts argument 'run'. At D:\Documents\WindowsPowerShell\Microsoft.PowerShell_profile.ps1:2 char:1 + Set-Alias cfxp cfx run -p "C:\Users

1.0 自定义标签的解析. 　　在之前的章节中,我们完成了对spring 默认标签的加载过程.那么现在我们将开始新的里程, spring 自定义标签的解析; 代码如下: 1 /** 2 * Parse the elements at the root level in the document: "import", "alias", "bean". 3 * 4 * @param root the DOM root element of the document 5 */ 6 protected void parseBeanDefinitions(Element root, 7 BeanDefinitionParserDelegate delegate) { 8 // 对Bean的处理 9 if (delegate.isDefaultNamespace(root)) { 10 NodeList nl = root.getChildNodes(); 11 for ( int i = 0; i < nl.getLength(); i++ ) { 12 Node node = nl.item(i); 13 if (node instanceof Element) { 14 Element ele = (Element) node; 15 if (delegate

2-命令行入门 2019.9.13 五大命令行工具 二进制可执行文件 shell内置命令 解释性脚本 shell函数 别名 shell函数 $ fac() { (echo 1; seq $1) | paste -s -d\* | bc} $ fac 5 120 shell函数就是由shell自己执行的函数，在我们这里就是由 Bash 执行的函数 我们定义了一个 fac() 函数，使用 seq 生成一串数字，用 paste 函数将这些数字放到一行中并用 * 分隔开，然后将这个等式传给 bc，由它求值并显示结果 文件 ~/.bashrc 是 Bash 的配置文件，所有的 shell 函数皆可在此定义，这样的好处是 shell 函数随时可用 别名 $ alias l = 'ls -1 --group-directories-first' 别名没有参数，所以 fac() 这样的函数不能用别名定义。 别名能减少敲击键盘的次数； 别名经常是在 '.bashrc' or '.bash_aliases' 配置文件中定义 不带参数运行 alias 即可查看所有的参数的别名。一般 ubuntu 上的默认别名有以下几个,不得不说，不看一下还是真的不知道 $alias alias egrep='egrep --color=auto' alias fgrep='fgrep --color=auto'

I'm on a mac, and I write quite a bit of python scripts. Every time I need to run them, I have to type ' python script_name.py '. Is there I way to make it so I only have to type like ' p script_name.py '? It would save some time :D I am assuming you are running your script from the command line right? If so, add the following line as the first line in your script: #!/usr/bin/python or alternatively #!/usr/bin/env python in case the python command is not located in /usr/bin , and then issue the following command once at the Unix/terminal prompt (it makes your script "executable"): chmod +x

I can't get expand_aliases to take effect in bash. I've tried a lot of different things, and nothing works. Here's the simple test case: /bin/bash -c 'shopt -s expand_aliases; alias cdtmp="cd /tmp"; alias; cdtmp; pwd;' And the output: $ /bin/bash -c 'shopt -s expand_aliases; alias cdtmp="cd /tmp"; alias; cdtmp; pwd;' alias cdtmp='cd /tmp' /bin/bash: cdtmp: command not found /home/user $ /bin/bash --version GNU bash, version 3.2.25(1)-release (i686-redhat-linux-gnu) Copyright (C) 2005 Free Software Foundation, Inc. (Yes, I'm using shopt instead of the -O option to bash, just to prove it's being

On Linux alias cdt='cd /usr/a' make a alias that when I type cdt I change the workpath to /use/a On PowerShell Set-Alias cdt "cd F://a" It seems not work Aliases can't use parameters, so define a function instead. function cdt { set-location "F:\a" } 来源： https://stackoverflow.com/questions/29716361/how-to-use-powershell-alias-cd-a-spec-directory