为了防止这种情况产生,需要在每个 case 子句的末尾使用 break 来跳出 switch 语句。 break 除了可以用来跳出 switch 语句外,还可以用来跳出循环语句(for、for in、while、do while 等),后面我们会详细介绍。 【示例1】下面示例使用 switch case 语句设计网站登录会员管理模块。 1 2 3 4 5 6 7 8 9 10 11 12...
在此示例中,该switch语句正在测试哈希表中值的类型。 必须使用和表达式返回布尔值以选择要执行的 scriptblock。 PowerShell $var= @{A =10; B ='abc'}foreach($keyin$var.Keys) {switch($var[$key].GetType()) { {$_-eq[int32] } {"$key+ 10 = $($var[$key] + 10)"} {$_-eq[string] ...
Switch 构造类似于具有多个 ElseIf 部分的 If 构造。 Switch 构造根据多个值计算单个变量或项目,并为每个值提供一个脚本块。 如果每个值与变量匹配,则运行该值的脚本块。 还有一个 Default 部分仅在没有匹配项时才运行。 Switch 构造使用以下语法: PowerShell ...
Evolution has come following version 2.4, you can freely DIY the switches and buttons that you want. Currently, evolution supportsShellandApple Script. They also can be invoked by hotkeys. Next, evolution will be able to be distributed by users as a shortcut utility platform. ...
JavaScript 还支持另外一种循环模式,即 for...in 循环。这一种类型的循环将对象属性作为参数变量来实现循环。 代码: 1<script>23//遍历 对象4varobject = [{name:"张三", age:20}, {name:"李四", age:30}, {name:"王五", age:40}];56//开始遍历7//var --> 一个‘小名’ --> in --> 对象...
Uses multiple steps to build understanding, rather than one shell script A single script which completes a long series of tasks can be useful, but builds no understanding of what is being done. As soon as someone wants to change the slightest aspect, they find they haven't gained any knowle...
Give unrestricted script access to powershell so venv can work: Open an administrator powershell window TypeSet-ExecutionPolicy Unrestrictedand answer A Close admin powershell window Windows Installation Open a regular Powershell terminal and type the following inside: ...
PowerShell使用函数时采用Switch还是Bool? 这是一篇翻译整理的稿子,相对而言比较有用,分享出来给大家。 原帖为 Using PowerShell Switch vs. Boolean Parameters in SMA Runbooks 原文发表在2013年,但是2021年依然还是有这个问题,或者说是这种设计。
This mode is useful when testing a script that was registered with the New-CertificateNotificationTask cmdlet. 展开表 Type: SwitchParameter Position: Named Default value: None Required: False Accept pipeline input: False Accept wildcard characters: False...
/usr/bin start_script() { ip netns exec management iptables-restore < /etc/sysconfig/iptables ip netns exec management iptables echo "iptables init script executed" > /etc/iptables_init.log } case "$1" in start) start_script ;; stop) ;; ...