Powershell pitfalls

Question

What Powershell pitfalls you have fall into? :-)

Mine are:

# -----------------------------------
function foo()
{
    @(\"text\")
}

# Expected 1, a         


        

Answer 1

Here is something Ive stumble upon lately (PowerShell 2.0 CTP):

$items = "item0", "item1", "item2"

$part = ($items | select-string "item0")

$items = ($items | where {$part -notcontains $_})

what do you think that $items be at the end of the script?

I was expecting "item1", "item2" but instead the value of $items is: "item0", "item1", "item2".