76 lines
2.5 KiB
VB.net
76 lines
2.5 KiB
VB.net
#Region "Microsoft.VisualBasic::91f1a64cf3bb254ca0f2bc9bee362f2d, Microsoft.VisualBasic.Core\Language\Linq\Rapply.vb"
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' Author:
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'
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' asuka (amethyst.asuka@gcmodeller.org)
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' xie (genetics@smrucc.org)
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' xieguigang (xie.guigang@live.com)
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'
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' Copyright (c) 2018 GPL3 Licensed
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'
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'
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' GNU GENERAL PUBLIC LICENSE (GPL3)
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'
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'
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' This program is free software: you can redistribute it and/or modify
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' it under the terms of the GNU General Public License as published by
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' the Free Software Foundation, either version 3 of the License, or
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' (at your option) any later version.
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'
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' This program is distributed in the hope that it will be useful,
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' but WITHOUT ANY WARRANTY; without even the implied warranty of
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' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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' GNU General Public License for more details.
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'
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' You should have received a copy of the GNU General Public License
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' along with this program. If not, see <http://www.gnu.org/licenses/>.
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' /********************************************************************************/
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' Summaries:
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' Module Rapply
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'
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' Function: lapply
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'
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'
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' /********************************************************************************/
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#End Region
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Imports System.Reflection
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Imports System.Runtime.CompilerServices
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Imports Microsoft.VisualBasic.ComponentModel.Collection.Generic
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Namespace Language
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''' <summary>
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''' Helper for implements ``lapply`` and ``sapply`` liked operations from R language
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''' </summary>
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Public Module Rapply
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<Extension>
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Public Function lapply(Of Tin As INamedValue, TOut)(sequence As IEnumerable(Of Tin), apply As [Delegate], ParamArray args As Object()) As Dictionary(Of String, TOut)
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Dim result As New Dictionary(Of String, TOut)
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Dim key$
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Dim value As Object
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Dim arguments As Object() = New Object(args.Length) {}
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Dim method As MethodInfo = apply.Method
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Dim obj As Object = apply.Target
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Call Array.ConstrainedCopy(args, Scan0, arguments, 1, args.Length)
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For Each item As Tin In sequence
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key = item.Key
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arguments(Scan0) = item
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value = method.Invoke(obj, arguments)
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result.Add(key, value)
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Next
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Return result
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End Function
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End Module
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End Namespace
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