PowerShell - Passing hashtables to a function - powershell

Question

I'm in the process of writing a CLI for a thing I'm working on, and at various points in the process I want to ask the user for input. Each time I ask the user for input, the questions/answers are likely to be different so I started out with something like:
$choices = [Management.Automation.Host.ChoiceDescription[]] #(
New-Object Management.Automation.Host.ChoiceDescription("&Yes","Option Description for Yes")
New-Object Management.Automation.Host.ChoiceDescription("&No","Option Description for No.")
)
$choice = $Host.UI.PromptForChoice("Question Title","Question Text",$choices,1)
This works pretty well, but it's a bit clunky when it comes to re-use especially if the number of choices expands.
I want to wrap it in a function that I can call easier - like:
$options = #{
Yes = "Option Description for Yes"
No = "Option Description for No"
}
askQuestion -title "Question Title" -question "Question Text" -options $options
So far so good. The bit I'm struggling with is accessing the properties of $options:
function askQuestion {
param (
[hashtable]$options,
[string]$title,
[string]$question
)
Write-Host $title -ForegroundColor Cyan
Write-Host $question -ForegroundColor Cyan
foreach($option in $options)
{
# Do stuff HERE
}
}
If I just access $option directly in the foreach, it prints out a table like:
Name Value
---- -----
No Option Description for No
Yes Option Description for Yes
If I try accessing $option.Name or .Value it doesn't seem to do anything at all.
Can someone point out where I'm going wrong with this please?

Answer 1

I think you can use the GetNumerator() method to iterate through the hash table entries. Then create a custom message using the format operator -f. $i here is just something to track a number for each line in the output. This should be fairly dynamic provided your values/descriptions are consistently worded so there are no grammatical/comprehension issues.
$i = 1
foreach ($option in $options.GetEnumerator()) {
"{2}. Enter {0} for {1}" -f $option.key,$option.value,$i++
}

Answer 2

For anyone interested, this is what this finished up looking like:
function askQuestion {
param (
[hashtable]$options,
[string]$title,
[string]$question
)
$choices = [Management.Automation.Host.ChoiceDescription[]] #(
foreach ($option in $options.GetEnumerator()) {
$selection = $option.key
$description = $option.value
New-Object Management.Automation.Host.ChoiceDescription("&$selection",$description)
}
)
$choice = $Host.UI.PromptForChoice($title,$question,$choices,1)
return
}
And it can be called with something like this, where $options is very flexible.
$options = #{
Yes = "Yes Description"
No = "No Description"
Maybe = "Maybe Description"
}
askQuestion -title "Question Title" -question "Question Text" -options $options