| 1 | #Region "Microsoft.VisualBasic::3ebde750944beb22fcb079945307e662, Microsoft.VisualBasic.Core\Scripting\Expressions\Aggregate.vb" |
| 2 | |
| 3 | ' Author: |
| 4 | ' |
| 5 | ' asuka (amethyst.asuka@gcmodeller.org) |
| 6 | ' xie (genetics@smrucc.org) |
| 7 | ' xieguigang (xie.guigang@live.com) |
| 8 | ' |
| 9 | ' Copyright (c) 2018 GPL3 Licensed |
| 10 | ' |
| 11 | ' |
| 12 | ' GNU GENERAL PUBLIC LICENSE (GPL3) |
| 13 | ' |
| 14 | ' |
| 15 | ' This program is free software: you can redistribute it and/or modify |
| 16 | ' it under the terms of the GNU General Public License as published by |
| 17 | ' the Free Software Foundation, either version 3 of the License, or |
| 18 | ' (at your option) any later version. |
| 19 | ' |
| 20 | ' This program is distributed in the hope that it will be useful, |
| 21 | ' but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 22 | ' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 23 | ' GNU General Public License for more details. |
| 24 | ' |
| 25 | ' You should have received a copy of the GNU General Public License |
| 26 | ' along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 27 | |
| 28 | |
| 29 | |
| 30 | ' /********************************************************************************/ |
| 31 | |
| 32 | ' Summaries: |
| 33 | |
| 34 | ' Module Aggregate |
| 35 | ' |
| 36 | ' Function: GetAggregateFunction |
| 37 | ' |
| 38 | ' |
| 39 | ' /********************************************************************************/ |
| 40 | |
| 41 | #End Region |
| 42 | |
| 43 | Imports System.Runtime.CompilerServices |
| 44 | |
| 45 | Namespace Scripting.Expressions |
| 46 | |
| 47 | Public Module Aggregate |
| 48 | |
| 49 | ''' <summary> |
| 50 | ''' Get ``Aggregate`` function by term. |
| 51 | ''' </summary> |
| 52 | ''' <param name="name$"> |
| 53 | ''' + max |
| 54 | ''' + min |
| 55 | ''' + average |
| 56 | ''' </param> |
| 57 | ''' <returns></returns> |
| 58 | ''' |
| 59 | <Extension> Public Function GetAggregateFunction(name$) As Func(Of IEnumerable(Of Double), Double) |
| 60 | Select Case LCase(name) |
| 61 | Case "max" |
| 62 | Return Function(x) x.Max |
| 63 | Case "min" |
| 64 | Return Function(x) x.Min |
| 65 | Case "average", "avg", "mean" |
| 66 | Return Function(x) x.Average |
| 67 | |
| 68 | Case Else |
| 69 | Throw New NotImplementedException(name) |
| 70 | End Select |
| 71 | End Function |
| 72 | End Module |
| 73 | End Namespace |