在PowerShell中查询LINQ样式列表 [英] Query a list LINQ-style in PowerShell

问题描述

add-type -Language CSharpVersion3 -TypeDefinition @"
    public class pack_code
    {
        public pack_code() {}

        public string code { get; set; }
        public string type { get; set; }
    }
"@

$a = New-Object pack_code
$a.code = "3"
$a.type = "5"
$b = New-Object pack_code
$b.code = "2"
$b.type = "5"
$c = New-Object pack_code
$c.code = "2"
$c.type = "5"
$d = New-Object pack_code
$d.code = "1"
$d.type = "1"

$codes = New-Object 'System.Collections.Generic.List[object]'
$codes.add($a)
$codes.add($b)
$codes.add($c)
$codes.add($d)

是否可以选择与$ codes不同并选择类型等于1的对象?如何将LINQ与PowerShell配合使用?

Is there a way to select distinct from $codes and select the objects where type equals 1? How can I use LINQ with PowerShell?

推荐答案

基思说的话.另外，在C#中更改了构造函数，并在Sort cmdlet上使用了-Unique参数.

What Keith said. Plus, changed the constructor in your C# and used the -Unique parameter on the Sort cmdlet.

Add-Type -Language CSharpVersion3 -TypeDefinition @"
    public class pack_code
    {
        public pack_code(string code, string type) {
            this.code=code;
            this.type=type;
        }

        public string code { get; set; }
        public string type { get; set; }
    }
"@

$codes = New-Object 'System.Collections.Generic.List[object]'
$codes.Add( ( New-Object pack_code 3, 5 ))
$codes.Add( ( New-Object pack_code 2, 5 ))
$codes.Add( ( New-Object pack_code 2, 5 ))
$codes.Add( ( New-Object pack_code 1, 1 ))
$codes.Add( ( New-Object pack_code 2, 2 ))
$codes.Add( ( New-Object pack_code 2, 1 ))
$codes.Add( ( New-Object pack_code 2, 1 ))

$codes | sort code, type -Unique | where {$_.type -eq 1}

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