-contains運算子會檢查集合中是否包含您的值。 一旦找到匹配項目,就會傳回$true。 PowerShell $array=1..6if($array-contains3) {# do something} 這是查看集合是否包含您值的慣用方式。 每次使用Where-Object(或-eq)遍歷整個清單,速度會明顯變慢。
We are given an array and element.Our goal is to check if array contains the element. For instance, given an array[PowerShell", "Java", "PHP"], we want to check if the string"Java"is an element of this array. This simple query opens up a range of important considerations such as ...
if 语句 比较运算符 集合运算符 显示另外 8 个 与许多其他语言一样,PowerShell 提供了用于在脚本中有条件地执行代码的语句。 其中一个语句是If语句。 今天,我们将深入探讨 PowerShell 中最基本的命令之一。 备注 本文的原始版本发布在@KevinMarquette撰写的博客上。 PowerShell 团队感谢 Kevin 与我们分享这篇文章。
PS> $empty = $null PS> $empty[0] Error: Cannot index into a null array. 因此,在尝试访问数组中的元素之前,请确保数组不是 $null。Count数组和其他集合具有计数属性,可告知数组中有多少项。PowerShell 复制 PS> $data.count 4 PowerShell 3.0 向大多数对象添加了计数属性。 你可以使用单个对象,它应该...
As a result, the $z array contains 1, 3, 5, and 9.To delete an array, assign a value of $null to the array. The following command deletes the array in the $a variable.$a = $nullYou can also use the Remove-Item cmdlet, but assigning a value of $null is faster, especially ...
Now, what if you’d like to know if the array $arrColors doesn’t contain the color purple. In that case, just use the –notcontains operator, an operator that returns True if the target value can’t be found in the array. In other words:...
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$error[0].Exception contains the original exception object as it was thrown to PowerShell. If we explore that object (also piped to get-member) we can see important items to pull up like stack trace, source, HResult, InnerException, etc. Diving into the exception object itself ( $error[...
A set of PowerShell functions you might use to enhance your own functions and scripts or to facilitate working in the console. Most should work in both Windows PowerShell and PowerShell 7, even cross-platform. Any operating system limitations should be h
if (-not $Token.Contains(".") -or -not $Token.StartsWith("eyJ")) { Write-Error "Invalid token" -ErrorAction Stop #Header $tokenheader = $Token.Split(".")[0].Replace('-', '+').Replace('_', '/') #Fix padding as needed, keep adding "=" until string length modulus 4 reache...