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Querying Arrays with PowerShell We can use the -in or -notin syntax to simply check if an array has a value that we pass to check.
Use the Contains method from an array. In the following example, the $array variable contains an array. The next line checks to see if the number 2 is in the array. It is, and the method returns True.
Retrieve items from an ArrayTo retrieve an element, specify its number, PowerShell automatically numbers the array elements starting at 0. Think of the index number as being an offset from the staring element. so $myArray[1,2+4.. 9] will return the elements at indices 1 and 2 and then 4 through 9 inclusive.
You can also use PowerShell to compare arrays using the Compare-Object cmdlet. This cmdlet takes a reference object and a difference object and returns a side indicator indicating which elements are and are not in either array. You can see below that the Compare-Object cmdlet allows you to compare both arrays at once.
How can I use the Array.Find method in powershell?
For example:
$a = 1,2,3,4,5
[Array]::Find($a, { args[0] -eq 3 })
gives
Cannot find an overload for "Find" and the argument count: "2".
At line:3 char:1
+ [Array]::Find($a, { $args[0] -eq 3 })
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [], MethodException
+ FullyQualifiedErrorId : MethodCountCouldNotFindBest
The array class has the methods I expect, as given by:
PS> [Array] | Get-Member -Static
TypeName: System.Array
Name MemberType Definition
---- ---------- ----------
Find Method static T Find[T](T[] array, System.Predicate[T] match)
Should the array be casted to something else to match the T[] type? I know there are other ways to achieve the find functionality, but I was wondering why this doesn't work.
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