如何检查哈希表中的内容？

问题描述

我的文件包含多组数据，如下所示：

Metadata          :
mxRecords         :
name              : dev-dev
arecords          : {@{ipv4Address=127.0.0.1},@{ipv4Address=127.0.0.2},@{ipv4Address=127.0.0.3},@{ipv4Address=127.0.0.4}}

我需要找到一组数据，其中arecords中包含我需要的ipv4Address。

如何获取ipv4Address的值？

解决方法

您具有嵌套的自定义对象，而不是哈希表。您可以使用成员访问运算符.来引用嵌套属性。

示例1：从一个对象中，找到包含目标IP地址的arecords对象

# Record example matching your post
$obj = [pscustomobject]@{
           metadata = ''
           mxRecords = ''
           name = 'dev-dev'
           arecords = [pscustomobject]@{ipv4Address='127.0.0.1'},[pscustomobject]@{ipv4Address='127.0.0.2'},[pscustomobject]@{ipv4Address='127.0.0.3'},[pscustomobject]@{ipv4Address='127.0.0.4'}
}
$targetIP = '127.0.0.3'
$obj.arecords | Where ipv4Address -eq $targetIP

# Output 
ipv4Address
-----------
127.0.0.3

示例2：从多个对象中，找到包含带有目标IP的arecords数组的对象

$obj = [pscustomobject]@{
           metadata = ''
           mxRecords = ''
           name = 'dev-dev'
           arecords = [pscustomobject]@{ipv4Address='127.0.0.1'},[pscustomobject]@{ipv4Address='127.0.0.4'}
},[pscustomobject]@{
           metadata = ''
           mxRecords = ''
           name = 'prod-prod'
           arecords = [pscustomobject]@{ipv4Address='127.0.0.10'},[pscustomobject]@{ipv4Address='127.0.0.20'},[pscustomobject]@{ipv4Address='127.0.0.30'},[pscustomobject]@{ipv4Address='127.0.0.40'}
}
$targetIP = '127.0.0.10'
$obj | Where {$_.arecords.ipv4Address -contains $targetIP}

# Output
metadata mxRecords name      arecords
-------- --------- ----      --------
                   prod-prod {@{ipv4Address=127.0.0.10},@{ipv4Address=127.0.0.20},@{ipv4Address=127.0.0.30},@{ipv4Address=127.0.0.40}}

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