What is the idiomatic way to slice an array relative to both of its ends?

Question

Powershell\'s array notation has rather bizarre, albeit documented, behavior for slicing the end of arrays. This section from the official documentation sums up the bizarreness

Answer 1

If you are looking for, say, the first three and last three elements in an array, with the results in an array, a little array addition will take care of the need.

[array]$A = (([int][char]'A')..([int][char]'Z')) | ForEach-Object {[char]$_}
$B = $A[0..2]+$A[-3..-1]
Clear-Host
Write-Host "Original List"
Write-Host $A -NoNewline -Separator ', '
Write-Host
Write-Host "First three and last three"
Write-Host $B -NoNewline -Separator ', '

Yields:

Original List
A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z
First three and last three
A, B, C, X, Y, Z