Looping through complex object with a variable in the variable name

Question

I have a complex object that is populated from a JSON string.

I'm trying to loop through a nested object that has a variable in the name itself.

So if I do a Write-Host $aaa.bbb.ccc1ccc.ddd I get a valid object back.
if I do a Write-Host $aaa.bbb.ccc2ccc.ddd I get a valid object back.

If I set $i = 1 and I do

Write-Host $aaa.bbb.ccc$($i)ccc.ddd it will of course fail.

If I try get-variable -valueonly -name "aaa.bbb.ccc$($i)ccc.ddd" I get an error: Cannot find a variable with the name 'aaa.bbb.ccc1ccc.ddd'

to be honest I can't even do a get-variable -valueonly -name "aaa.bbb"

There are other objects like aaa.bbb.dddd. that I don't want.

If $i is [1..100] can someone show me how to loop through this object?

Thanks,

Mathias R. Jessen · Accepted Answer · 2018-09-12 15:58:43Z

1

When using the . reference operator, since version 3.0, you can substitute an expandable string for any member reference:

$aaa.bbb."ccc${i}ccc".ddd

so in your example you could do:

1..2 |ForEach-Object { $aaa.bbb."ccc${i}ccc".ddd }

answered Sep 12, 2018 at 15:58

Mathias R. Jessen

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1 Comment

Oh, thank you. I've been beating my head against my keyboard for hours on this one.