e.g.:
var a = (b == 1)?true:false;
Fortunately, there is a way however it doesn't use the usual ?: notation:
$a = 4
@{$true=1;$false=0}[$a -lt 5]
It's also possible to call a function from within the query:
function retValue($ret){
return " "+$ret
}
$b = 0
$a = @{$true=retValue "FOO!";$false=retValue "BAR!"}[$b -eq 1]
Thanks for providing this. I was looking for the same.
ReplyDeletePowershell *does* have a 'ternary operator':
ReplyDelete$a = if ($b -eq 1) { true } else { false }
Definitely better. Takes advantage of the fact that PowerShell returns any uncaptured output.
Deletev. nice - and I guess if you had multiple cases you could do the same with switch...
DeleteSlightly simpler perhaps:
ReplyDelete$a=5;
@("False!","True, a<5")[$a -lt 5];
The @() makes an array with subscripts 0 and 1. The $a -lt 5 gives true or false, but as subscript uses true=1 and false=0, so it indexes the array. By the way, in the earlier example, I'd bet the retValue function is called both for True and for False.
Agreed - definitely simpler. And yes, retValue will be called for both - shows the output if $a -ge 5
DeleteAlso you can inline expressions like this
ReplyDelete$a = 1 + $(if ($b -eq 1) { 1 } else { 2 })
which is a more clear for me than
$a = 1 + @{$true=1;$false=2}[$b -eq 1]
If you are going to do this:
ReplyDelete$a = if ($b -eq 1) { true } else { false }
Why wouldn't you just use this:
$a = ($b -eq 1)
It will give you the same true/false output. The problem I have is when I'm checking for null object properties:
$name = if ($aduser.givenname) { $aduser.givenname } else { $aduser.surname; }
It would be nice to simplify this (but oh well):
$name=($aduser.givenname)?$aduser.givenname:$aduser.surname;