| 1 | #Region "Microsoft.VisualBasic::e7acb2cc6f8ebc2d0e8963795c6463b0, Microsoft.VisualBasic.Core\Language\Value\Numeric\Numeric.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 Numeric |
| 35 | ' |
| 36 | ' Function: Equals, GreaterThan, GreaterThanOrEquals, LessThan, LessThanOrEquals |
| 37 | ' MaxIndex, MinIndex, NextInteger, (+2 Overloads) Reverse, ToUInt32 |
| 38 | ' ToUInt64 |
| 39 | ' |
| 40 | ' Class Precise |
| 41 | ' |
| 42 | ' |
| 43 | ' |
| 44 | ' |
| 45 | ' /********************************************************************************/ |
| 46 | |
| 47 | #End Region |
| 48 | |
| 49 | Imports System.Runtime.CompilerServices |
| 50 | |
| 51 | Namespace Language |
| 52 | |
| 53 | ''' <summary> |
| 54 | ''' Defines a generalized type-specific comparison method that a value type or class |
| 55 | ''' implements to order or sort its instances. |
| 56 | ''' </summary> |
| 57 | ''' <remarks> |
| 58 | ''' |
| 59 | ''' Summary: |
| 60 | ''' |
| 61 | ''' Compares the current instance with another object of the same type and returns |
| 62 | ''' an integer that indicates whether the current instance precedes, follows, or |
| 63 | ''' occurs in the same position in the sort order as the other object. |
| 64 | ''' |
| 65 | ''' Returns: |
| 66 | ''' |
| 67 | ''' A value that indicates the relative order of the objects being compared. The |
| 68 | ''' return value has these meanings: |
| 69 | ''' |
| 70 | ''' 1. Value Meaning Less than zero |
| 71 | ''' This instance precedes obj in the sort order. |
| 72 | ''' |
| 73 | ''' 2. Zero |
| 74 | ''' This instance occurs in the same position in the sort order as obj. |
| 75 | ''' |
| 76 | ''' 3. Greater than zero |
| 77 | ''' This instance follows obj in the sort order. |
| 78 | ''' |
| 79 | ''' Exceptions: |
| 80 | ''' |
| 81 | ''' T:System.ArgumentException: |
| 82 | ''' obj is not the same type as this instance. |
| 83 | ''' </remarks> |
| 84 | Public Module Numeric |
| 85 | |
| 86 | #Region "VB type char helper" |
| 87 | Public Const yes! = 1 |
| 88 | Public Const no! = 0 |
| 89 | #End Region |
| 90 | |
| 91 | ''' <summary> |
| 92 | ''' *<see cref="Numeric.MaxIndex"/>* The max element its index in the source collection. |
| 93 | ''' </summary> |
| 94 | ''' <typeparam name="T"></typeparam> |
| 95 | ''' <param name="source"></param> |
| 96 | ''' <returns></returns> |
| 97 | <Extension> |
| 98 | Public Function MaxIndex(Of T As IComparable)(source As IEnumerable(Of T)) As Integer |
| 99 | Dim i As Integer |
| 100 | Dim max As T = source.First |
| 101 | Dim maxInd As Integer = 0 |
| 102 | |
| 103 | For Each x As T In source.Skip(1) |
| 104 | i += 1 |
| 105 | |
| 106 | If x.CompareTo(max) > 0 Then |
| 107 | max = x |
| 108 | maxInd = i |
| 109 | End If |
| 110 | Next |
| 111 | |
| 112 | Return maxInd |
| 113 | End Function |
| 114 | |
| 115 | <Extension> |
| 116 | Public Function MinIndex(Of T As IComparable)(source As IEnumerable(Of T)) As Integer |
| 117 | Dim i As Integer |
| 118 | Dim min As T = source.First |
| 119 | Dim minInd As Integer = 0 |
| 120 | |
| 121 | For Each x As T In source.Skip(1) |
| 122 | i += 1 |
| 123 | |
| 124 | If x.CompareTo(min) < 0 Then |
| 125 | min = x |
| 126 | minInd = i |
| 127 | End If |
| 128 | Next |
| 129 | |
| 130 | Return minInd |
| 131 | End Function |
| 132 | |
| 133 | ''' <summary> |
| 134 | ''' = |
| 135 | ''' </summary> |
| 136 | ''' <typeparam name="T"></typeparam> |
| 137 | ''' <param name="a"></param> |
| 138 | ''' <param name="b"></param> |
| 139 | ''' <returns></returns> |
| 140 | Public Function Equals(Of T As IComparable)(a As T, b As T) As Boolean |
| 141 | Return a.CompareTo(b) = 0 |
| 142 | End Function |
| 143 | |
| 144 | ''' <summary> |
| 145 | ''' < |
| 146 | ''' </summary> |
| 147 | ''' <typeparam name="T"></typeparam> |
| 148 | ''' <param name="a"></param> |
| 149 | ''' <param name="b"></param> |
| 150 | ''' <returns></returns> |
| 151 | <Extension> Public Function LessThan(Of T As IComparable)(a As T, b As T) As Boolean |
| 152 | Return a.CompareTo(b) < 0 |
| 153 | End Function |
| 154 | |
| 155 | ''' <summary> |
| 156 | ''' a > b |
| 157 | ''' </summary> |
| 158 | ''' <typeparam name="T"></typeparam> |
| 159 | ''' <param name="a"></param> |
| 160 | ''' <param name="b"></param> |
| 161 | ''' <returns></returns> |
| 162 | <Extension> Public Function GreaterThan(Of T As IComparable)(a As T, b As T) As Boolean |
| 163 | Return a.CompareTo(b) > 0 |
| 164 | End Function |
| 165 | |
| 166 | ''' <summary> |
| 167 | ''' ``<paramref name="a"/> <= <paramref name="b"/>`` |
| 168 | ''' </summary> |
| 169 | ''' <typeparam name="T"></typeparam> |
| 170 | ''' <param name="a"></param> |
| 171 | ''' <param name="b"></param> |
| 172 | ''' <returns></returns> |
| 173 | <Extension> Public Function LessThanOrEquals(Of T As IComparable)(a As T, b As T) As Boolean |
| 174 | Return a.LessThan(b) OrElse Equals(a, b) |
| 175 | End Function |
| 176 | |
| 177 | ''' <summary> |
| 178 | ''' => |
| 179 | ''' </summary> |
| 180 | ''' <typeparam name="T"></typeparam> |
| 181 | ''' <param name="a"></param> |
| 182 | ''' <param name="b"></param> |
| 183 | ''' <returns></returns> |
| 184 | <Extension> Public Function GreaterThanOrEquals(Of T As IComparable)(a As T, b As T) As Boolean |
| 185 | Return a.GreaterThan(b) OrElse Equals(a, b) |
| 186 | End Function |
| 187 | |
| 188 | ''' <summary> |
| 189 | ''' <see cref="Random"/> get next integer in the specific range <paramref name="max"/> |
| 190 | ''' </summary> |
| 191 | ''' <param name="rnd"></param> |
| 192 | ''' <param name="max"></param> |
| 193 | ''' <returns></returns> |
| 194 | <Extension> Public Function NextInteger(rnd As Random, max As Integer) As int |
| 195 | Return New int(rnd.Next(max)) |
| 196 | End Function |
| 197 | |
| 198 | Public Function ToUInt32(value As Single) As UInteger |
| 199 | Dim bytes As Byte() = BitConverter.GetBytes(value) |
| 200 | Return BitConverter.ToUInt32(bytes, 0) |
| 201 | End Function |
| 202 | |
| 203 | Public Function ToUInt64(value As Double) As ULong |
| 204 | Dim bytes As Byte() = BitConverter.GetBytes(value) |
| 205 | Return BitConverter.ToUInt64(bytes, 0) |
| 206 | End Function |
| 207 | |
| 208 | Public Function Reverse(value As UInteger) As UInteger |
| 209 | Dim reversed As UInteger = (value And &HFF) << 24 Or (value And &HFF00) << 8 Or (value And &HFF0000) >> 8 Or (value And &HFF000000UI) >> 24 |
| 210 | Return reversed |
| 211 | End Function |
| 212 | |
| 213 | Public Function Reverse(value As Integer) As Integer |
| 214 | Dim uvalue As UInteger = CUInt(value) |
| 215 | Dim reversed As UInteger = Reverse(uvalue) |
| 216 | Return CInt(reversed) |
| 217 | End Function |
| 218 | End Module |
| 219 | |
| 220 | Public Class Precise : Inherits Value(Of Decimal) |
| 221 | |
| 222 | End Class |
| 223 | End Namespace |