Delete value from hashtable in powershell

Question

I want to delete a specific value from hashtable.

The table looks like this:

Name                           Value                                                                                                                                             
----                           -----                                                                                                                                             
column                         {test, test2}

How can I delete the "test2" value?

I tried the following:

$myhashtable.remove("test2")

which unfortunately does not work.

Could someone help me with this? Thanks!

EBGreen · Accepted Answer · 2013-05-06 15:06:45Z

7

The example that you provided looks like a hashtable of hashtables. So you would need to do:

$myhashtable['column'].Remove('test2')

If it is a hashtable where the value is an array, then you would need to do this:

$myHashTable['column'] = ($myHashTable['column'] | ?{$_ -ne 'test2'})

edited May 6, 2013 at 15:06

answered May 6, 2013 at 14:36

EBGreen

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7 Comments

Adeel ASIF Over a year ago

It doesn't work, i have this error : Exception calling "Remove" with "1" argument(s): "Collection was of a fixed size."

EBGreen Over a year ago

I did try it and it did work. This means that it is not a hashtable of hashtables. How do you populate $myHashTable?

EBGreen Over a year ago

With a little more testing it looks like it is probably a hashtable with an array for the value. If possible I think that your best bet would be to make sure that the value doesn't get into the array to begin with. Failing that you would need to make a new array minus the unwanted value then assing that in the hashtable.

EBGreen Over a year ago

So yeah, the addition to the answer should work. Complete information when asking questions will generally get you a more complete answer for future reference.

EBGreen Over a year ago

Errr, up there where I said assing, I meant assigning.

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