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 |