I'm working with a REST API and need to modify an object that's returned as a hash with many properties. After fetching the properties, I want to edit one field and then re-submit the object while excluding a few fields, like LastModified. Initially, I thought about using a foreach loop similar to how I'd handle an array, but I'm unsure how to apply that to a hash. Any tips on how to do this effectively?
3 Answers
You can easily remove keys from a hashtable in PowerShell. If your hashtable is stored in a variable called `$original`, and you have an array of keys you want to exclude in `$keysToExclude`, you can do this:
foreach ($key in $keysToExclude) {
$original.Remove($key)
}
If you'd like to keep the original and work on a copy, you can clone it first:
$updated = $original.Clone()
Then just remove the keys you want from `$updated`. This way, you’ll have your modified hashtable ready to use!
It sounds like you might be mixing up arrays and hashtables. If you want to filter an array based on excluded values, you can use:
$updated = $original | Where-Object {$_ -notin $valuesToExclude}
This way, it will build a new filtered array without the values you want to exclude. Just make sure you’re working with the correct data type!
I ran into the same issue! In PowerShell, if you want to build a new hashtable while excluding certain keys, you can loop through the properties like this:
$updated = @{}
foreach ($entry in $original.Keys) {
if ($keysToExclude -NOTCONTAINS $entry) {
$updated[$entry] = $original[$entry]
}
}
This code will work well, even if your object has nested hashes. Happy coding!
Also, if you're dealing with `[pscustomobject]`, you can directly use Select-Object to exclude properties:
[pscustomobject]$original | Select-Object -Property * -ExcludeProperty $keysToExclude
This casts it appropriately and can simplify your task if it's a custom object rather than a straightforward hashtable.