CODEWITHSUNDEEP
powershell
samy
samy

Reputation: 14962

Removing item from a splattered array in powershell

I have a script where i define the following variable for a build script:

$globalExcludePath = @('obj', 'App_Data', 'Properties' )

I'd like to remove an item in a specific function but the remove function doesn't exist and i couldn't find any pointer on how to do it.

$customExcludePath = $globalExcludePath
$customExcludePath.Remove('App_Data') # fails

Any idea on how to do it?

Upvotes: 0

Views: 86

Answers (2)

mjolinor
mjolinor

Reputation: 68273

Arrays don't have a Remove method. You can put it into a generic collection that does.

One option is to explicitly load it into a specific collection type, like arralylist

$globalExcludePath = [collections.arraylist]('obj', 'App_Data', 'Properties' )
$globalExcludePath.Remove('App_Data')
$globalExcludePath

Another option is to use the scriptblock .invoke() method, which returns a collection of generic powershell objects:

$globalExcludePath = {'obj', 'App_Data', 'Properties'}.Invoke()
$globalExcludePath.Remove('App_Data') > $nul
$globalExcludePath

The remove method on that type returns True or False depending on whether the remove operation was successful, and you probably want to redirect that to $nul so it doesn't pollute the pipeline.

Upvotes: 1

CB.
CB.

Reputation: 60918

Simple Array are size fixed. You can do this:

$customExcludePath = $globalExcludePath | ? { $_ -ne 'App_Data' }

or use [list]

[System.Collections.Generic.List[string]]$customExcludePath = $globalExcludePath
$customExcludePath.Remove('App_Data')
True
$customExcludePath
obj
Properties

Upvotes: 1

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