PowerShell查询哈希表的嵌套子元素
在 PowerShell 中，我想统计所有使用球的运动。挑战在于它们的级别低于我可以通过直接Where-Object 查询访问的级别。这是哈希表：
$league = @{
school = @{
name = 'Lincoln High School'
levels = ('9','10','11','12')
}
sports = @{
football = @{
coed = 'b'
season = 'fall'
balls = $true
}
hockey = @{
coed = 'b'
season = 'winter'
balls = $false
}
lacrosse = @{
coed = 'g'
season = 'spring'
balls = $true
}
swim = @{
coed = 'c'
season = 'winter'
balls = $false
}
}
}
如何设计查询以跳到balls？每项运动在关键级别的命名都不同，并且通配符似乎不起作用。
( $league.sports | Where-Object { $_.[?].balls -eq $true } ).count
我需要一些东西来连接这项运动的儿童元素。
In PowerShell, I want to get a count of all sports that use balls. The challenge is that they're a level lower than I can access with a direct Where-Object query. Here's the hashtable:
$league = @{
school = @{
name = 'Lincoln High School'
levels = ('9','10','11','12')
}
sports = @{
football = @{
coed = 'b'
season = 'fall'
balls = $true
}
hockey = @{
coed = 'b'
season = 'winter'
balls = $false
}
lacrosse = @{
coed = 'g'
season = 'spring'
balls = $true
}
swim = @{
coed = 'c'
season = 'winter'
balls = $false
}
}
}
How do I fashion the query to skip to the balls? Each sport is named differently at the key level, and wildcards don't seem to work.
( $league.sports | Where-Object { $_.[?].balls -eq $true } ).count
I need something to bridge to the child element of the sport.
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使用
.where(..)：使用
Where-Object：如您所见，这两种方法都需要使用
.GetEnumerator()方法。另一种更详细的替代方案：
Using
.where(..):Using
Where-Object:As you can see, both methods require the use of
.GetEnumerator()method.Another more verbose alternative: