Powershell: Hashtable & PSCustomObject 区别

哈希表 是一种数据结构，用于存储键值对（也称为字典或者关联数组）

语法：

$Var = @{ <key1> = <value1> ; < key2> = <value2> ; ..... ; < keyN> = <valueN>;}

example:

创建哈希表

$employee = @{name = "Allen";age =40 ; address ="abc"}

 

PSCustomObject 旨在于用简单的方法来创建结构化数据

$myObject = [PSCustomObject]@{
    Name     = 'Allen'
    age = '40l'
    address    = 'abc'
}

or

$myHashtable = @{
    Name     = 'Allen'
    age = '40'
    address    = 'abc'
}

$myObject = [pscustomobject]$myHashtable

 

区别： 

使用 [PSCustomObject]而不是HashTable的一种情况是在需要它们的集合时.以下是说明它们处理方式的不同之处:

$Hash = 1..10 | %{ @{Name="Object $_" ; Index=$_ ; Squared = $_*$_} }
$Custom = 1..10 | %{[PSCustomObject] @{Name="Object $_" ; Index=$_ ; Squared = $_*$_} }

$Hash   | Format-Table -AutoSize
$Custom | Format-Table -AutoSize

$Hash   | Export-Csv .\Hash.csv -NoTypeInformation
$Custom | Export-Csv .\CustomObject.csv -NoTypeInformation

Format-Table将产生以下结果$Hash:

Name    Value
----    -----
Name    Object 1
Squared 1
Index   1
Name    Object 2
Squared 4
Index   2
Name    Object 3
Squared 9
...

以下是$CustomObject:

Name      Index Squared
----      ----- -------
Object 1      1       1
Object 2      2       4
Object 3      3       9
Object 4      4      16
Object 5      5      25
...

以上不同的举例来自于

https://qa.1r1g.com/sf/ask/980894141/