PowerShellでwindowed関数的なやつ。

Get-Chunk.ps1

[OutputType("System.Array")]
[CmdletBinding()]
param (
    [Parameter(Mandatory, ValueFromPipeline)]
    [psobject]$InputObject,

    [Parameter(Mandatory, Position = 0)]
    [int]$Size,

    [Parameter()]
    [int]$Step = 1
)

begin {
    if ($Size -le 0 -or $Step -le 0) {
        throw "Both size and step must be greater than 0."
    }

    $buffer = [System.Collections.Generic.List[psobject]]::new()
}

process {
    $InputObject | ForEach-Object {
        [void]$buffer.Add($_)
    }
}

end {
    return 0..(($buffer.Count - $Size) / $Step) `
    | ForEach-Object { $_ * $Step } `
    | ForEach-Object { , $buffer[$_..($_ + $Size - 1)] }
}