How to use a Select-Object to create your custom object array for you

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Often when I am creating custom data, I usually:
1.run a query to get the data I want
2.iterate through that returned list and create new objects 
3.add these objects to a separate array holder
4.return that.
You can merge this with something like:
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 $drives = [System.IO.DriveInfo]::GetDrives() |
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    Where-Object {$_.TotalSize} |
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    Select-Object   @{Name='Name';     Expr={$_.Name}},
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                    @{Name='Label';    Expr={$_.VolumeLabel}},
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                    @{Name='Size(GB)'; Expr={[int32]($_.TotalSize / 1GB)}},
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                    @{Name='Free(GB)'; Expr={[int32]($_.AvailableFreeSpace / 1GB)}},
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                    @{Name='Free(%)';  Expr={[math]::Round($_.AvailableFreeSpace / $_.TotalSize,2)*100}},
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                    @{Name='Format';   Expr={$_.DriveFormat}},
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                    @{Name='Type';     Expr={[string]$_.DriveType}},
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                    @{Name='Computer'; Expr={$ComputerName}}
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​
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$drives | ConvertTo-Json -Compress
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Saves time and makes the code faster and more readable!
Credit for the above code is here.

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