arrays - Array.Find和IndexOf用于完全相同对象的多个元素

Question

我很难获得完全相同对象的多个元素的当前元素索引:

$b = "A","D","B","D","C","E","D","F"
$b | ? { $_ -contains "D" }

替代版本:

$b = "A","D","B","D","C","E","D","F"
[Array]::FindAll($b, [Predicate[String]]{ $args[0] -contains "D" })

这将返回:
d
d
d

但是这段代码:

$b | % { $b.IndexOf("D") }

替代版本:

[Array]::FindAll($b, [Predicate[String]]{ $args[0] -contains "D" }) | % { $b.IndexOf($_) }

返回值:

1个
1个
1个

所以它指向第一个元素的索引。 如何获取其他元素的索引？

Answer 1

你可以这样做:

$b = "A","D","B","D","C","E","D","F" 

(0..($b.Count-1)) | where {$b[$_] -eq 'D'}

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