blocks|key|1659176|text|不幸的是，在PowerShell中没有类似的东西。我写了一篇关于这方面的博客文章，并提出了一个通用测试的建议--任何函数/过滤器。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1659177|function+Test-Any()+{
++++begin+{
++++++++$any+=+$false
++++}
++++process+{
++++++++$any+=+$true
++++}
++++end+{
++++++++$any
++++}
}|code-block|syntax|javascript|1659178|博客帖子：|1659179|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Unfortunately there is no equivalent in PowerShell. I wrote a blog post about this with a suggestion for a general purpose Test-Any function / filter.
<pre><code>function Test-Any() {
 begin {
 $any = $false
 }
 process {
 $any = $true
 }
 end {
 $any
 }
}
</code></pre>
Blog post: <a href="https://docs.microsoft.com/en-us/archive/blogs/jaredpar/is-there-anything-in-that-pipeline" rel="nofollow noreferrer">Is there anything in that pipeline?</a>

blocks|key|1659248|text|@JaredPar答案的一个变体，将测试合并到Test-Any过滤器中：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1659249|function+Test-Any+{
++++[CmdletBinding()]
++++param($EvaluateCondition,
++++++++[Parameter(ValueFromPipeline+=+$true)]+$ObjectToTest)
++++begin+{
++++++++$any+=+$false
++++}
++++process+{
++++++++if+(-not+$any+-and+(&+$EvaluateCondition+$ObjectToTest))+{
++++++++++++$any+=+$true
++++++++}
++++}
++++end+{
++++++++$any
++++}
}|code-block|syntax|javascript|1659250|现在我可以像这样编写“任何”测试|1659251|>+1..4+%7C+Test-Any+{+$_+-gt+3+}
True

>+1..4+%7C+Test-Any+{+$_+-gt+5+}
False|1659252|entityMap^0|N|8|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|U|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|P|$]]

A variation on @JaredPar's answer, to incorporate the test in the <code>Test-Any</code> filter:

<pre><code>function Test-Any {
 [CmdletBinding()]
 param($EvaluateCondition,
 [Parameter(ValueFromPipeline = $true)] $ObjectToTest)
 begin {
 $any = $false
 }
 process {
 if (-not $any -and (&amp; $EvaluateCondition $ObjectToTest)) {
 $any = $true
 }
 }
 end {
 $any
 }
}
</code></pre>

Now I can write "any" tests like

<pre><code>&gt; 1..4 | Test-Any { $_ -gt 3 }
True

&gt; 1..4 | Test-Any { $_ -gt 5 }
False
</code></pre>

blocks|key|1589926|text|您可以使用原始的LINQ+Any|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1589927|[Linq.Enumerable]::Any($list)|code-block|syntax|javascript|1589928|entityMap^0|D|3|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

You can use the original LINQ <code>Any</code>:

<pre><code>[Linq.Enumerable]::Any($list)
</code></pre>

blocks|key|1657374|text|我现在的方法是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1657375|gci+-r+-force+`
++++%7C+?+{+$_.PSIsContainer+-and+$_.Name+-match+"%5E[._]svn$"+}+`
++++%7C+select+Parent+-Unique|code-block|syntax|javascript|1657376|1657377|原因是|1657378|select-object+{$_.Directory}|1657379|没有返回任何有用的东西的原因是DirectoryInfo对象上没有这样的属性。至少在我的PowerShell里没有。|offset|length|style|CODE|1657380|1657381|为了详细说明您自己的答案:+PowerShell可以将大多数非空集合视为$true，因此您可以简单地这样做：|1657382|$svnDirs+=+gci+`
++++%7C+?+{$_.PsIsContainer}+`
++++%7C+?+{
++++++++gci+$_.Name+-Force+`
++++++++++++%7C+?+{$_.PSIsContainer+-and+($_.Name+-eq+"_svn"+-or+$_.Name+-eq+".svn")+}
++++++++}|1657383|entityMap^0|0|0|0|0|0|F|D|0|0|10|5|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|10|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|11|8|@]|9|@]|A|$]]|$1|J|3|K|5|D|7|12|8|@]|9|@]|A|$E|F]]|$1|L|3|M|5|6|7|13|8|@$N|14|O|15|P|Q]]|9|@]|A|$]]|$1|R|3|-4|5|6|7|16|8|@]|9|@]|A|$]]|$1|S|3|T|5|6|7|17|8|@$N|18|O|19|P|Q]]|9|@]|A|$]]|$1|U|3|V|5|D|7|1A|8|@]|9|@]|A|$E|F]]|$1|W|3|-4|5|6|7|1B|8|@]|9|@]|A|$]]]|X|$]]

My approach now was:

<pre><code>gci -r -force `
 | ? { $_.PSIsContainer -and $_.Name -match "^[._]svn$" } `
 | select Parent -Unique
</code></pre>

<hr>

The reason why

<pre><code>select-object {$_.Directory}
</code></pre>

doesn't return anything useful is that there is no such property on a <code>DirectoryInfo</code> object. At least not in my PowerShell.

<hr>

To elaborate on your own answer: PowerShell can treat most non-empty collections as <code>$true</code>, so you can simply do:

<pre><code>$svnDirs = gci `
 | ? {$_.PsIsContainer} `
 | ? {
 gci $_.Name -Force `
 | ? {$_.PSIsContainer -and ($_.Name -eq "_svn" -or $_.Name -eq ".svn") }
 }
</code></pre>

blocks|key|183597|text|实际上非常简单-只需选择first+$true+(为清晰起见，设置了格式)：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|183598|[bool]+($source+`
++++++++%7C+foreach+{+[bool]+(<predicate>)+}+`
++++++++%7C+where+{+$_+}+`
++++++++%7C+select+-first+1)|code-block|syntax|javascript|183599|另一种方式：|183600|($source+`
++++++++%7C+where+{+<predicate>+}+`
++++++++%7C+foreach+{+$true+}+`
++++++++%7C+select+-first+1)|183601|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

It's actually quite simple - just select first $true (formatted for clarity):



<pre><code>[bool] ($source `
 | foreach { [bool] (&lt;predicate&gt;) } `
 | where { $_ } `
 | select -first 1)
</code></pre>

Alternative way:



<pre><code>($source `
 | where { &lt;predicate&gt; } `
 | foreach { $true } `
 | select -first 1)
</code></pre>

blocks|key|357692|text|我最后做了一次计数：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|357693|$directoryContainsSvn+=+{
++++(Get-ChildItem+$_.Name+-force+%7C+?+{$_.PsIsContainer+-and+$_.Name+-eq+"_svn"+-or+$_.Name+-eq+".svn"}+%7C+Measure-Object).Count+-eq+1
}
$svnDirs+=+Get-ChildItem+%7C+?+{$_.PsIsContainer}+%7C+?+$directoryContainsSvn|code-block|syntax|javascript|357694|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I ended up doing it with a count:

<pre><code>$directoryContainsSvn = {
 (Get-ChildItem $_.Name -force | ? {$_.PsIsContainer -and $_.Name -eq "_svn" -or $_.Name -eq ".svn"} | Measure-Object).Count -eq 1
}
$svnDirs = Get-ChildItem | ? {$_.PsIsContainer} | ? $directoryContainsSvn
</code></pre>

blocks|key|1657405|text|你可以把这个收紧一点：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1657406|gci+-fo+%7C+?{$_.PSIsContainer+-and+`
++++++++++++(gci+$_+-r+-fo+%7C+?{$_.PSIsContainer+-and+$_+-match+'[_.]svn$'})}|code-block|syntax|javascript|1657407|注意-不需要将$__.Name传递给嵌套的gci。传递$_就足够了。|1657408|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

You can tighten this up a bit: 

<pre><code>gci -fo | ?{$_.PSIsContainer -and `
 (gci $_ -r -fo | ?{$_.PSIsContainer -and $_ -match '[_.]svn$'})}
</code></pre>

Note - passing $__.Name to the nested gci is unnecessary. Passing it $_ is sufficent.

blocks|key|183522|text|我推荐以下解决方案：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|183523|<#
.SYNOPSIS+
+++Tests+if+any+object+in+an+array+matches+the+expression

.EXAMPLE
++++@(+"red",+"blue"+)+%7C+Where-Any+{+$_+-eq+"blue"+}+%7C+Write-Host
#>
function+Where-Any+
{
++++[CmdletBinding()]
++++param(
++++++++[Parameter(Mandatory+=+$True)]
++++++++$Condition,

++++++++[Parameter(Mandatory+=+$True,+ValueFromPipeline+=+$True)]
++++++++$Item
++++)

++++begin+{
++++++++[bool]$isMatch+=+$False
++++}

++++process+{
++++++if+(&+$Condition+$Item)+{
++++++++++[bool]$isMatch+=+$true
++++++}
++++}

++++end+{
++++++++Write-Output+$isMatch
++++}
}

#+optional+alias
New-Alias+any+Where-Any|code-block|syntax|javascript|183524|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I recommend the following solution: 

<pre><code>&lt;#
.SYNOPSIS 
 Tests if any object in an array matches the expression

.EXAMPLE
 @( "red", "blue" ) | Where-Any { $_ -eq "blue" } | Write-Host
#&gt;
function Where-Any 
{
 [CmdletBinding()]
 param(
 [Parameter(Mandatory = $True)]
 $Condition,

 [Parameter(Mandatory = $True, ValueFromPipeline = $True)]
 $Item
 )

 begin {
 [bool]$isMatch = $False
 }

 process {
 if (&amp; $Condition $Item) {
 [bool]$isMatch = $true
 }
 }

 end {
 Write-Output $isMatch
 }
}

# optional alias
New-Alias any Where-Any
</code></pre>

blocks|key|357755|text|这是到目前为止我发现的最好的方法(如果已经找到true，则不会迭代所有元素，也不会中断管道)：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|357756|来自|357757|可以使用内置的$input变量，该变量包含函数作用域中的整个管道。|357758|因此，所需的代码可能如下所示：|357759|function+Test-Any([scriptBlock]+$scriptBlock+=+{$true},+[scriptBlock]+$debugOut+=+$null)
{
++++if+($debugOut)
++++{
++++++++Write-Host(“{0}+%7C+%25+{{{1}}}”+-f+$input,+$scriptBlock)
++++}

++++$_ret+=+$false;
++++$_input+=+($input+-as+[Collections.IEnumerator])

++++if+($_input)
++++{
++++++++while+($_input.MoveNext())
++++++++{
++++++++++++$_+=+$_input.Current;

++++++++++++Write-Host+$_

++++++++++++if+($debugOut)
++++++++++++{
++++++++++++++++Write-Host(“Tested:+[{0}]”+-f+(&$debugOut))
++++++++++++}

++++++++++++if+(&$scriptBlock)
++++++++++++{
++++++++++++++++if+($debugOut)
++++++++++++++++{
++++++++++++++++++++Write-Host(“Matched:+[{0}]”+-f+(&$debugOut))
++++++++++++++++}

++++++++++++++++$_ret+=+$true
++++++++++++++++break
++++++++++++}
++++++++}
++++}

++++$_ret
}|code-block|syntax|javascript|357760|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Q|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|R|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|S|8|@]|9|@]|A|$K|L]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

This is the best method that I found so far (does not iterate over all elements if already found a true, and does not break the pipeline):

From <a href="https://chrisseroka.wordpress.com/2011/04/06/linq-any-equivalent-in-powershell" rel="nofollow noreferrer">LINQ Any() equivalent in PowerShell</a>

It’s possible to use a built-in $input variable that contains the whole pipeline in a scope of function.

So, the desired code could look like the following:

<pre><code>function Test-Any([scriptBlock] $scriptBlock = {$true}, [scriptBlock] $debugOut = $null)
{
 if ($debugOut)
 {
 Write-Host(“{0} | % {{{1}}}” -f $input, $scriptBlock)
 }

 $_ret = $false;
 $_input = ($input -as [Collections.IEnumerator])

 if ($_input)
 {
 while ($_input.MoveNext())
 {
 $_ = $_input.Current;

 Write-Host $_

 if ($debugOut)
 {
 Write-Host(“Tested: [{0}]” -f (&amp;$debugOut))
 }

 if (&amp;$scriptBlock)
 {
 if ($debugOut)
 {
 Write-Host(“Matched: [{0}]” -f (&amp;$debugOut))
 }

 $_ret = $true
 break
 }
 }
 }

 $_ret
}
</code></pre>

blocks|key|358047|text|我认为这里最好的答案是@JaredPar提出的函数，但是如果你像我一样喜欢一行程序，我建议遵循Any+一行程序。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|CODE|entityRanges|data|358048|#+Any+item+is+greater+than+5
$result+=+$arr+%7C+%25{+$match+=+$false+}{+$match+=+$match+-or+$_+-gt+5+}{+$match+}|code-block|syntax|javascript|358049|%25{+$match+=+$false+}{+$match+=+$match+-or+YOUR_CONDITION+}{+$match+}检查是否至少有一项匹配条件。|358050|需要注意的是，通常Any操作会对数组求值，直到找到第一个匹配条件的项。但是这段代码会计算所有的项目。|358051|仅此一提，您可以轻松地将其调整为All+单行|358052|#+All+items+are+greater+than+zero
$result+=+$arr+%7C+%25{+$match+=+$false+}{+$match+=+$match+-and+$_+-gt+0+}{+$match+}|358053|%25{+$match+=+$false+}{+$match+=+$match+-and+YOUR_CONDITION+}{+$match+}检查所有项目是否与条件匹配。|358054|注意，要检查任何需要的-or和检查所有需要的-and。|358055|entityMap^0|1B|3|1F|4|1B|3|0|0|0|1W|0|0|G|3|K|2|G|3|0|0|0|1X|0|B|3|M|4|0^^$0|@$1|2|3|4|5|6|7|Z|8|@$9|10|A|11|B|C]|$9|12|A|13|B|C]|$9|14|A|15|B|D]]|E|@]|F|$]]|$1|G|3|H|5|I|7|16|8|@]|E|@]|F|$J|K]]|$1|L|3|M|5|6|7|17|8|@$9|18|A|19|B|D]]|E|@]|F|$]]|$1|N|3|O|5|6|7|1A|8|@]|E|@]|F|$]]|$1|P|3|Q|5|6|7|1B|8|@$9|1C|A|1D|B|C]|$9|1E|A|1F|B|C]|$9|1G|A|1H|B|D]]|E|@]|F|$]]|$1|R|3|S|5|I|7|1I|8|@]|E|@]|F|$J|K]]|$1|T|3|U|5|6|7|1J|8|@$9|1K|A|1L|B|D]]|E|@]|F|$]]|$1|V|3|W|5|6|7|1M|8|@$9|1N|A|1O|B|D]|$9|1P|A|1Q|B|D]]|E|@]|F|$]]|$1|X|3|-4|5|6|7|1R|8|@]|E|@]|F|$]]]|Y|$]]

I think that the best answer here is the function proposed by @JaredPar, but if you like one-liners as I do I'd like to propose following <code>Any</code> one-liner:

<pre><code># Any item is greater than 5
$result = $arr | %{ $match = $false }{ $match = $match -or $_ -gt 5 }{ $match }
</code></pre>

<code>%{ $match = $false }{ $match = $match -or YOUR_CONDITION }{ $match }</code> checks that at least one item match condition.

One note - usually the Any operation evaluates the array until it finds the first item matching the condition. But this code evaluates all items.

Just to mention, you can easily adjust it to become <code>All</code> one-liner:

<pre><code># All items are greater than zero
$result = $arr | %{ $match = $false }{ $match = $match -and $_ -gt 0 }{ $match }
</code></pre>

<code>%{ $match = $false }{ $match = $match -and YOUR_CONDITION }{ $match }</code> checks that all items match condition.

Notice, that to check Any you need <code>-or</code> and to check All you need <code>-and</code>.

blocks|key|357828|text|我采用了一种更具linq风格的方法。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|357829|我知道这个问题可能太老了。我用这个来满足我的需求：|357830|PS>+$searchData+=+"unn"
PS>+$StringData+=+@("unn",+"dew",+"tri",+"peswar",+"pymp")
PS>+$delegate+=++[Func[string,bool]]{+param($d);+return+$d+-eq+$searchData+}
PS>+[Linq.Enumerable]::Any([string[]]$StringData,+$delegate)|code-block|syntax|javascript|357831|取自此处：|357832|https://www.red-gate.com/simple-talk/dotnet/net-framework/high-performance-powershell-linq/#post-71022-_Toc482783751|offset|length|357833|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|0|0|38|0|0^^$0|@$1|2|3|4|5|6|7|V|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|W|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|X|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|Y|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|Z|8|@]|9|@$M|10|N|11|1|12]]|A|$]]|$1|O|3|-4|5|6|7|13|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|L]]]]

I took a more linq-style approach.
I know this question is probably super old. I used this to accomplish my needs:
<pre><code>PS&gt; $searchData = &quot;unn&quot;
PS&gt; $StringData = @(&quot;unn&quot;, &quot;dew&quot;, &quot;tri&quot;, &quot;peswar&quot;, &quot;pymp&quot;)
PS&gt; $delegate = [Func[string,bool]]{ param($d); return $d -eq $searchData }
PS&gt; [Linq.Enumerable]::Any([string[]]$StringData, $delegate)
</code></pre>
Taken from here:
<a href="https://www.red-gate.com/simple-talk/dotnet/net-framework/high-performance-powershell-linq/#post-71022-_Toc482783751" rel="nofollow noreferrer">https://www.red-gate.com/simple-talk/dotnet/net-framework/high-performance-powershell-linq/#post-71022-_Toc482783751</a>

I would like to find all directories at the top level from the location of the script that are stored in subversion.

In C# it would be something like this

<pre><code>Directory.GetDirectories(".")
 .Where(d=&gt;Directories.GetDirectories(d)
 .Any(x =&gt; x == "_svn" || ".svn"));
</code></pre>

I'm having a bit of difficulty finding the equivalent of "Any()" in PowerShell, and I don't want to go through the awkwardness of calling the extension method.

So far I've got this:

<pre><code> Get-ChildItem | ? {$_.PsIsContainer} | Get-ChildItem -force | ? {$_.PsIsContainer -and $_.Name -eq "_svn" -or $_.Name -eq ".svn"
</code></pre>

This finds me the <code>svn</code> directories themselves, but not their parent directories - which is what I want. Bonus points if you can tell me why adding

<pre><code> | Select-Object {$_.Directory}
</code></pre>

to the end of that command list simply displays a sequence of blank lines.

PowerShell equivalent of LINQ Any()?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我想从存储在subversion中的脚本的位置找到顶层的所有目录。在C#中应该是这样的Directory.GetDirectories(".")  .Where(d=>Directories.GetDirectories(d)     .Any(x => x == "_svn" || ".svn"));我在PowerShell中找到"Any()“的对等物有点困难，我不想经历调用扩展方法的尴尬。到目

问LINQ Any()的PowerShell等价物？
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问LINQ Any()的PowerShell等价物？
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