When I write powershell scripts, I always use below method to check whether variable is null or not.
if ($variable -eq $null) {
}When I use VScode, VScode suggested me to put $null to left. Why?
Check below example:
$object = @(1, $null, 2, $null)
# "not safe" comparison with $null, perhaps a mistake
if ($object -eq $null) {
# -eq gets @($null, $null) which is evaluated to $true by if
'This is called.'
}
# safe comparison with $null
if ($null -eq $object) {
'This is not called.'
}So, the right way to compare is always put $null on the left side.
if ($null-eq $variable) {
}