PowerShell Create a series in System.Object (PSCustomObject)

Question

Is there an easier way to accomplish this without typing the series out? I tried some ideas with arrays and dereferencing, but nothing ended up working.

$rowP = "" | Select-Object Course,"5","6","7","8","9","10","11","12","13","14","15","16","17","18","19","20","21","22","23","24","25","26","27","28","29","30","31","32","33","34","35"

Mathias R. Jessen · Accepted Answer · 2021-06-16 15:09:56Z

2

I prefer the following approach.

Create an ordered dictionary:

$properties = [ordered]@{
  Course = $null
}

Use the .. range operator to generate the range of integers 5 through 35, add empty entries to the dictionary:

5..35 |ForEach-Object {
  $properties["${_}"] = $null
}

Convert the dictionary to a PSCustomObject:

$object = [pscustomobject]$properties

Alternatively, you could also use the range operator to generate the integer range and pass those as property names to Select-Object:

"" |Select-Object -Property @('Course'; 5..35 -as [string[]])

answered Jun 16, 2021 at 15:09

Mathias R. Jessen

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2 Comments

Brian McMahon Over a year ago

"" |Select-Object -Property @('Course'; 5..35 -as [string[]]) This is what I was experimenting with but I was attempting to cast 5..35, like Course,[string[]] (5..35) and did not use the "Course"; at all. Thanks, this give good insight into where I was going wrong.

Mathias R. Jessen Over a year ago

@BrianMcMahon You're welcome! Bareword arguments (strings without quotation marks) only work in argument mode (when you're passing a literal argument to a command basically). Check out the about_Parsing help topic for more details :)

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