Pipeline/Pipeline.ps1
#region Copyright & License # Copyright © 2012 - 2020 François Chabot # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. #endregion Set-StrictMode -Version Latest <# .SYNOPSIS Tests whether there is anything in a pipeline. .DESCRIPTION This command will return $true if there is anything in the pipeline, or $false otherwise. .EXAMPLE PS> Get-ChildItem | Test-Any .NOTES See https://blogs.msdn.microsoft.com/jaredpar/2008/06/12/is-there-anything-in-that-pipeline/ © 2020 be.stateless. #> function Test-Any { [CmdletBinding()] [OutputType([bool])] param( [Parameter(ValueFromPipeline = $true)] [AllowEmptyCollection()] [psobject[]] $InputObject ) begin { Resolve-ActionPreference -Cmdlet $PSCmdlet -SessionState $ExecutionContext.SessionState $any = $false } process { if (-not $any) { $InputObject | ForEach-Object -Process { $_ } | Where-Object -FilterScript { $null -ne $_ } | ForEach-Object -Process { $any = $true } } } end { $any } } <# .SYNOPSIS Tests whether there is nothing in a pipeline. .DESCRIPTION This command will return $true if there is nothing in the pipeline, or $false otherwise. .EXAMPLE PS> Get-ChildItem | Test-None .NOTES © 2020 be.stateless. #> function Test-None { [CmdletBinding()] [OutputType([bool])] param( [Parameter(ValueFromPipeline = $true)] [AllowEmptyCollection()] [psobject[]] $InputObject ) begin { Resolve-ActionPreference -Cmdlet $PSCmdlet -SessionState $ExecutionContext.SessionState $none = $true } process { if ($none) { $InputObject | ForEach-Object -Process { $_ } | Where-Object -FilterScript { $null -ne $_ } | ForEach-Object -Process { $none = $false } } } end { $none } } # 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