| 1 | #Region "Microsoft.VisualBasic::81224ebc33c10a8bccb9a424a5517a6a, Microsoft.VisualBasic.Core\Language\Language\Java\Arrays.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 Arrays |
| 35 | ' |
| 36 | ' Function: copyOfRange, Max, Min, Shuffle, SubList |
| 37 | ' |
| 38 | ' Sub: Fill |
| 39 | ' |
| 40 | ' |
| 41 | ' /********************************************************************************/ |
| 42 | |
| 43 | #End Region |
| 44 | |
| 45 | Imports System.Runtime.CompilerServices |
| 46 | Imports Microsoft.VisualBasic.Math |
| 47 | |
| 48 | Namespace Language.Java |
| 49 | |
| 50 | Public Module Arrays |
| 51 | |
| 52 | <Extension> |
| 53 | Public Sub Fill(Of T)(ByRef a As T(), val As T) |
| 54 | For i% = 0 To a.Length - 1 |
| 55 | a(i%) = val |
| 56 | Next |
| 57 | End Sub |
| 58 | |
| 59 | Public Function copyOfRange(Of T)(matrix As T(), start As Integer, length As Integer) As T() |
| 60 | Dim out As T() = New T(length - 1) {} |
| 61 | Call Array.Copy(matrix, start, out, Scan0, length) |
| 62 | Return out |
| 63 | End Function |
| 64 | |
| 65 | <Extension> |
| 66 | Public Function Shuffle(Of T)(ByRef list As List(Of T)) As List(Of T) |
| 67 | Dim rnd As New Random |
| 68 | Call rnd.Shuffle(list) |
| 69 | Return list |
| 70 | End Function |
| 71 | |
| 72 | ''' <summary> |
| 73 | ''' Returns a view of the portion of this list between the specified fromIndex, inclusive, |
| 74 | ''' and toIndex, exclusive. (If fromIndex and toIndex are equal, the returned list is empty.) |
| 75 | ''' The returned list is backed by this list, so non-structural changes in the returned |
| 76 | ''' list are reflected in this list, and vice-versa. The returned list supports all of the |
| 77 | ''' optional list operations supported by this list. |
| 78 | ''' </summary> |
| 79 | ''' <typeparam name="T"></typeparam> |
| 80 | ''' <param name="list"></param> |
| 81 | ''' <param name="fromIndex%">low endpoint (inclusive) of the subList</param> |
| 82 | ''' <param name="toIndex%">high endpoint (exclusive) of the subList</param> |
| 83 | ''' <returns>a view of the specified range within this list</returns> |
| 84 | ''' |
| 85 | <Extension> |
| 86 | Public Function SubList(Of T)(list As List(Of T), fromIndex%, toIndex%) As List(Of T) |
| 87 | Return list.Skip(fromIndex).Take(toIndex - fromIndex).AsList |
| 88 | End Function |
| 89 | |
| 90 | <Extension> |
| 91 | Public Function Min(Of T As IComparable(Of T))(source As IEnumerable(Of T)) As T |
| 92 | Return Enumerable.Min(source) |
| 93 | End Function |
| 94 | |
| 95 | <Extension> |
| 96 | Public Function Max(Of T As IComparable(Of T))(source As IEnumerable(Of T)) As T |
| 97 | Return Enumerable.Max(source) |
| 98 | End Function |
| 99 | End Module |
| 100 | End Namespace |