Removing an item from a array of objects in Powershell

Question

I have an array object $a which returns an output like below.

Suppose $a returns this

And by doing $a[0].Name I can access each "Name" entry, $a[0].Available I can access its corresponding Available space.

I have another array say $b which contains some names, say $b returns me two names "sandeep_aggr1" and "aggr4". This is just an array (no properties like Name, Avaiable), not an object, so It can't use Compare-Object.

I want to remove other entries in the original object $a, except for those with "Name" equal to "sandeep_aggr1" and "aggr4".

This is what I am doing.

foreach($bb in $b)
    {
          foreach($aa in $a)
          {
                if($aa.Name -ne $bb)
                {
                   $aa.Remove($aa.Name)
                }

          }


    }

    echo $a

But, I don't see the elements deleted, am I missing something here ? Any help appreciated

mjolinor · Accepted Answer · 2013-04-03 18:15:13Z

10

If I'm reading the question correctly, this should work:

$a = $a | where {$b -contains $_.Name}

answered Apr 3, 2013 at 18:15

mjolinor

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1 Comment

Sandeep Over a year ago

Thanks, didn't expect that it's that easy using pipe. Works exactly as expected.

Saveriu CIANELLI · Accepted Answer · 2015-07-23 14:30:15Z

1

I had the same problem and it doesn't work if $a become an array with only one element. Powershell loose the fact that $a is an array. That was very problematic because I used JSON convertion just after.

I just added a cast:

$a = [array]($a | where {$b -contains $_.Name})

answered Jul 23, 2015 at 14:30

Saveriu CIANELLI

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