Forum Discussion
Quick variable validation
Hello, I am working on a function, i'm at a point where i have two variables, only one of them will have a value, the other is $null. I want to use the variable that has a value in the followin...
you can use "-ne" operator.
Examples:
PS C:\> ($null,10,$null,20 -ne $null)[0]
10
PS C:\>
PS C:\>
PS C:\> $a1=$null
PS C:\> $a2=2
PS C:\> ($a1,$a2 -ne $null)[0]
2
Explanation:
1) comma ',' operation creates array from your values/variables. Result: array with some null elements
2) '-ne' operator filter out null values. Result: array with only not-null elements
3) '[]' operator will take the 1st element from the array produced at step 2
Requirements:
Code assumes at least one variable is not null.