SwissKnife

1.0.0-preview6

functions/Add-MemberOrSetValue.ps1

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 function Add-MemberOrSetValue {
    [cmdletbinding()]
    param(
        [Parameter(Mandatory = $true, ValueFromPipeline = $true)]
        [object]$InputObject,
        [Parameter(Mandatory = $true)]
        [string]$PropertyName,
        [Parameter(Mandatory = $true)]
        [object]$PropertyValue
    )

    process {
        if (-not (Get-Member -InputObject $InputObject -name $PropertyName -Membertype Properties)) {
            $InputObject | Add-Member -NotePropertyName $PropertyName -NotePropertyValue $PropertyValue
        }
        else {
            $InputObject."$PropertyName" = $PropertyValue
        }
    }
}