141 lines
4.6 KiB
VB.net
141 lines
4.6 KiB
VB.net
#Region "Microsoft.VisualBasic::4e0486640d640d50e9a0c21084bc822e, Microsoft.VisualBasic.Core\My\JavaScript\Linq.vb"
|
|
|
|
' Author:
|
|
'
|
|
' asuka (amethyst.asuka@gcmodeller.org)
|
|
' xie (genetics@smrucc.org)
|
|
' xieguigang (xie.guigang@live.com)
|
|
'
|
|
' Copyright (c) 2018 GPL3 Licensed
|
|
'
|
|
'
|
|
' GNU GENERAL PUBLIC LICENSE (GPL3)
|
|
'
|
|
'
|
|
' This program is free software: you can redistribute it and/or modify
|
|
' it under the terms of the GNU General Public License as published by
|
|
' the Free Software Foundation, either version 3 of the License, or
|
|
' (at your option) any later version.
|
|
'
|
|
' This program is distributed in the hope that it will be useful,
|
|
' but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
' GNU General Public License for more details.
|
|
'
|
|
' You should have received a copy of the GNU General Public License
|
|
' along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
|
|
|
|
' /********************************************************************************/
|
|
|
|
' Summaries:
|
|
|
|
' Module Linq
|
|
'
|
|
' Function: pop, reduce, shift, (+2 Overloads) sort
|
|
'
|
|
' Sub: (+2 Overloads) splice
|
|
'
|
|
'
|
|
' /********************************************************************************/
|
|
|
|
#End Region
|
|
|
|
Imports System.Runtime.CompilerServices
|
|
|
|
Namespace My.JavaScript
|
|
|
|
<HideModuleName> Public Module Linq
|
|
|
|
<Extension>
|
|
Public Sub splice(Of T)(array As T(), index As Integer, howmany As Integer, ParamArray items As T())
|
|
Throw New NotImplementedException
|
|
End Sub
|
|
|
|
<Extension>
|
|
Public Sub splice(Of T)(list As List(Of T), index As Integer, howmany As Integer, ParamArray items As T())
|
|
Throw New NotImplementedException
|
|
End Sub
|
|
|
|
''' <summary>
|
|
'''
|
|
''' </summary>
|
|
''' <typeparam name="T">序列的类型</typeparam>
|
|
''' <typeparam name="V">序列进行降维之后的结果类型</typeparam>
|
|
''' <param name="seq"></param>
|
|
''' <param name="produce"></param>
|
|
''' <param name="init"></param>
|
|
''' <returns></returns>
|
|
<Extension>
|
|
Public Function reduce(Of T, V)(seq As IEnumerable(Of T), produce As Func(Of V, T, V), init As V) As V
|
|
For Each x As T In seq
|
|
init = produce(init, x)
|
|
Next
|
|
|
|
Return init
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function sort(Of T)(seq As IEnumerable(Of T), comparer As Comparison(Of T)) As IEnumerable(Of T)
|
|
With New List(Of T)(seq)
|
|
Call .Sort(comparer)
|
|
Return .AsEnumerable
|
|
End With
|
|
End Function
|
|
|
|
<MethodImpl(MethodImplOptions.AggressiveInlining)>
|
|
<Extension>
|
|
Public Function sort(Of T)(seq As IEnumerable(Of T), comparer As Func(Of T, T, Double)) As IEnumerable(Of T)
|
|
Return seq.sort(Function(x, y)
|
|
Dim d As Double = comparer(x, y)
|
|
|
|
If d > 0 Then
|
|
Return 1
|
|
ElseIf d < 0 Then
|
|
Return -1
|
|
Else
|
|
Return 0
|
|
End If
|
|
End Function)
|
|
End Function
|
|
|
|
''' <summary>
|
|
''' 用于删除并返回数组的最后一个元素。
|
|
''' </summary>
|
|
''' <typeparam name="T"></typeparam>
|
|
''' <param name="a"></param>
|
|
''' <returns></returns>
|
|
<Extension>
|
|
Public Function pop(Of T)(ByRef a As T()) As T
|
|
Dim last = a.LastOrDefault
|
|
|
|
If a.Length > 0 Then
|
|
ReDim Preserve a(a.Length - 1)
|
|
End If
|
|
|
|
Return last
|
|
End Function
|
|
|
|
''' <summary>
|
|
''' 用于把数组的第一个元素从其中删除，并返回第一个元素的值。
|
|
''' </summary>
|
|
''' <typeparam name="T"></typeparam>
|
|
''' <param name="a"></param>
|
|
''' <returns></returns>
|
|
<Extension>
|
|
Public Function shift(Of T)(ByRef a As T()) As T
|
|
Dim first = a.FirstOrDefault
|
|
|
|
If a.Length > 0 Then
|
|
Dim resize As T() = New T(a.Length - 1) {}
|
|
|
|
Array.ConstrainedCopy(a, 1, resize, Scan0, resize.Length)
|
|
a = resize
|
|
End If
|
|
|
|
Return first
|
|
End Function
|
|
End Module
|
|
End Namespace
|