Powershell Get Hashtable Values

Question

I've got this Hashtable with this values:

Name                           Value                                                                                                            
----                           -----                                                                                                            
Bayas_palm_stem_A0311.jpg      1                                                                                                                
Bayas_palm_stem_A0312.jpg      2                                                                                                                
Bukit_Bangkong_area.tiff       1                                                                                                                
BY_and_siblings_A0259.jpg      5                                                                                                                
Cassava_camp_A0275.jpg         1                                                                                                                
Children_A0115.jpg             6                                                                                                                
cip_barau_kubak.jpg            1

How can i get only the Name and Value where Value is greater than 1 ?

I'm tryng with this code, but i'm doing something wrong!!!

$RT | Group-Object Name , Value | Where-Object {$RT.Values -gt 1}

Thanks a lot for any help.

Mathias R. Jessen · Accepted Answer · 2020-08-11 17:30:33Z

3

Use $hashtable.GetEnumerator() to enumerate the individual name-value pairs in the hashtable:

$RT.GetEnumerator() |Where-Object {$_.Value -gt 1}

Beware that if you assign the resulting pairs to a variable, it's not longer a hashtable - it's just an array of individual name-value pairs.

To create a new hashtable with only the name-value pairs that filter through, do:

$RTFiltered = @{}
$RT.GetEnumerator() |Where-Object {$_.Value -gt 1} |ForEach-Object {$RTFiltered.Add($_.Name, $_.Value)}

answered Aug 11, 2020 at 17:30

Mathias R. Jessen

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Farbkreis · Accepted Answer · 2020-08-11 17:30:23Z

1

Like this:

$RT.getenumerator() | Where-Object {$_.Value -gt 1}

answered Aug 11, 2020 at 17:30

Farbkreis

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Comments

FoxDeploy · Accepted Answer · 2020-08-11 17:31:48Z

Assuming you have a Hashtable defined like this.

$rt = @{
"Bayas_palm_stem_A0311.jpg " =     1                                                                                                             
"Bayas_palm_stem_A0312.jpg " =     2                                                                                                               
"Bukit_Bangkong_area.tiff  " =     1                                                                                                              
"BY_and_siblings_A0259.jpg " =     5                                                                                                             
"Cassava_camp_A0275.jpg    " =     1                                                                                                            
"Children_A0115.jpg        " =     6
"cip_barau_kubak.jpg       " =     1
}

You can call GetEnumerator() which allows you to iterate through the Hashtable.

Once you've got an enumeration of the members, then your normal PowerShell value comparisons will work.

You can get values greater than 1 like this:

$rt.GetEnumerator() | ? Value -gt 1

Name                           Value                                                                                            
----                           -----                                                                                            
BY_and_siblings_A0259.jpg      5                                                                                                
Children_A0115.jpg             6                                                                                                
Bayas_palm_stem_A0312.jpg      2

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