Mastering Windows PowerShell Scripting - Second Edition

Removing elements by index

Removing elements based on an index requires the creation of a new array and omission of the value in the element in that index. In each of the following cases, an array with 100 elements will be used as an example; the element at index 49 (with the value of 50) will be removed:

$oldArray = 1..100 

This method uses indexes to access and add everything we want to keep:

$newArray = $oldArray[0..48] + $oldArray[50..99] 

Using the .NET Array.Copy static method (see Chapter 8, Working with .NET):

$newArray = New-Object Object[] ($oldArray.Count - 1) # Before the index [Array]::Copy($oldArray, # Source $newArray, # Destination 49) # Number of elements to copy # After the index [Array]::Copy($oldArray, # Source 50, # Copy ...