Powershell array turns into hashtable when assigning it to a hashtable

Question

In powershell I have this code:

$AddTags = @()
$AddTags = $AddTags + "ABC"
$AddTags = $AddTags + "abc"
$Object = @{
    "id"   = 1;
    "tags" = $AddTags
}
if($Object.tags -ne $AddTags)
{
    "Why is this?"
}

For some reason, $Object.tags doesn't equal $AddTags. Why i hover over $Object in VS code debug mode, I can see that $Object.tags contains a hashtable with one Entry, being the key "tags" and the value $AddTags. Why is that?

I have searched for this Problem and haven't found it anywhere.

.tags is not a Hashtable. $Object.tags.GetType() --> System.Array. Use Compare-Object to test if arrays have the same elements — Theo
– Theo, Commented Feb 21, 2023 at 11:16
If you are trying to add to that fixed array, you'd use +=; which isn't recommended to begin with. So, it would be: $AddTags += 'ABC'; $AddTags += 'abc' — Abraham Zinala
– Abraham Zinala, Commented Feb 21, 2023 at 17:20

LGhoul · Accepted Answer · 2023-02-21 12:06:24Z

0

Thanks, Theo. The problem here is that I didn't compare the arrays correctly. I learned how to do that here. Modifying the code like this works:

$AddTags = @()
$AddTags = $AddTags + "ABC"
$AddTags = $AddTags + "abc"
$Object = @{
    "id"   = 1;
    "tags" = $AddTags
}
$areEqual = @(Compare-Object $Object.tags $AddTags).Length -eq 0
if(!$areEqual)
{
    "This will no longer show up."
}

answered Feb 21, 2023 at 12:06

LGhoul

1

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