问题
$a = @()
How do I check if $a above is empty (which it is). I would like to get $true as answer.
回答1:
That's not an associative array, it's a regular array, but the answer is the same. Use .Count and compare to 0.
An associative array is called a [hashtable] in PowerShell and its literal form uses @{} (curly braces).
@{}.Count -eq 0 # hashtable (associative array)
@().Count -eq 0 # array
回答2:
Arrays have Count property, and you can check if this value is 0. So the condition you would check for is
$a.Count -eq 0
来源：https://stackoverflow.com/questions/37058338/how-to-check-if-an-associative-array-is-empty-in-powershell