Flatten array in PowerShell

Question

Assume we have:

$a = @(1, @(2, @(3)))

I would like to flatten $a to get @(1, 2, 3).

I have found one solution

Answer 1

Piping is the correct way to flatten nested structures, so I'm not sure what would be more "elegant". Yes, the syntax is a bit line-noisy looking, but frankly quite serviceable.

2020 Edit

The recommended syntax these days is to expand % to ForEach-Object. A bit more verbose but definitely more readable:

@($a | ForEach-Object {$_}).count