按多个属性对对象进行排序

Question

我正在尝试使用 PowerShell 对表示应用程序版本的对象进行排序

$versionsObjects = @{
    Major = 3
    Minor = 2
    Bugfix = 1
},
@{
    Major = 3
    Minor = 5
    Bugfix = 1
},
@{
    Major = 1
    Minor = 2
    Bugfix = 1
},
@{
    Major = 4
    Minor = 2
    Bugfix = 1
}

$sortedVersions = ($versionsObjects | Sort-Object -Property @{Expression="Major"; Descending=$true}, @{Expression="Minor" ;Descending=$true}, @{Expression="Bugfix"; Descending=$true})
$sortedVersions | %{echo ( "{0}.{1}.{2}" -f $_.Major, $_.Minor, $_.Bugfix)}

输出与输入的顺序相同：

3.2.1
3.5.1
1.2.1
4.2.1

但应该是

4.2.1
3.5.1
3.2.1
1.2.1

我究竟做错了什么？

Answer 1

你的表达不太对。试试这个 Sort-Object 部分：

Sort-Object -Property @{Expression={$_.Major}; Descending=$true}, @{Expression={$_.Minor} ;Descending=$true}, @{Expression={$_.Bugfix}; Descending=$true})

Answer 2

如果你至少在 powershell v3.0 中，你可以这样做：

$versionsObjects = [ordered]@{
    Major = 3
    Minor = 2
    Bugfix = 1
},
[ordered]@{
    Major = 3
    Minor = 5
    Bugfix = 1
},
[ordered]@{
    Major = 1
    Minor = 2
    Bugfix = 1
},
[ordered]@{
    Major = 4
    Minor = 2
    Bugfix = 1
}

$versionsObjects | % { $_.values  -join '.' } | sort -Descending {[version]$_ }

或对于所有版本：

$versionsObjects = @{
    Major = 3
    Minor = 2
    Bugfix = 1
},
@{
    Major = 3
    Minor = 5
    Bugfix = 1
},
@{
    Major = 1
    Minor = 2
    Bugfix = 1
},
@{
    Major = 4
    Minor = 2
    Bugfix = 1
}

$versionsObjects | % { $_.Major,$_.Minor,$_.bugfix  -join '.' } | sort -Descending {[version]$_ }