You can use $s|% t*y instead [char[]]$s to split a string to char array.
Given from TessellatingHeckler's answer: % t*y expands to | ForEach-Object -Method ToCharArray equiv. of "$args".ToCharArray()
% t*yexpands to| ForEach-Object -Method ToCharArrayequiv. of"$args".ToCharArray()
For example, compare
$s|% t*y
and
[char[]]$s
and
$s.ToCharArray()
It's useful with $args especially: $args|% t*y