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C#,VB.NET数组去重复，提取键名和重复键和非重复键

news 2025/10/18 6:34:46

vb.net 输入字符串数组，得到不重复的数据，有重复的键,无重复的键

比如,a,a,b,b,c; 不重复的键=a,b,c 有重复的键=a,b 无重复的键=c ，回这3个数组

在VB.NET中，可以通过以下方法实现字符串数组的去重及分类处理：

方法实现

‌使用LINQ的Distinct方法获取不重复数据集合‌1
‌通过GroupBy分组统计重复次数，筛选出重复键和非重复键‌1
‌利用字典进行高效数据分类‌1

vbnet_数组去重分类,功能说明

‌核心方法‌：ClassifyArray函数接收字符串数组，返回包含三个分类的元组1
‌去重处理‌：使用LINQ的Distinct方法获取唯一值集合1
‌频率统计‌：通过GroupBy创建元素出现次数字典
‌分类逻辑‌：根据出现次数将元素分为重复键和非重复键两类1
‌输出示例‌：输入{"a","a","b","b","c"}将输出分类结果

C#代码示例


using System;
using System.Collections.Generic;
using System.Linq;class ArrayClassifier
{public static void ClassifyArray(string[] arr, out string[] allKeys, out string[] duplicateKeys, out string[] nonDuplicateKeys){// 获取所有唯一键var uniqueItems = arr.Distinct().ToArray();allKeys = uniqueItems;// 统计元素出现次数var countDict = arr.GroupBy(x => x).ToDictionary(g => g.Key, g => g.Count());// 分类处理var dupList = new List<string>();var nonDupList = new List<string>();foreach (var key in uniqueItems){if (countDict[key] > 1)dupList.Add(key);elsenonDupList.Add(key);}duplicateKeys = dupList.ToArray();nonDuplicateKeys = nonDupList.ToArray();}static void Main(string[] args){string[] testArray = { "a", "a", "b", "b", "c" };string[] all, duplicates, nonDuplicates;ClassifyArray(testArray, out all, out duplicates, out nonDuplicates);Console.WriteLine($"所有键: {string.Join(",", all)}");Console.WriteLine($"有重复的键: {string.Join(",", duplicates)}");Console.WriteLine($"无重复的键: {string.Join(",", nonDuplicates)}");}
}

VB.NET实现的字符串数组分类函数，根据用户需求返回三个分类数组：vb_数组分类


Module ArrayClassifierPublic Sub ClassifyArray(ByVal arr As String(), ByRef 所有键 As String(), ByRef 有重复的键 As String(), ByRef 无重复的键 As String())' 获取所有唯一键Dim uniqueKeys = arr.Distinct().ToArray()所有键 = uniqueKeys' 统计元素出现次数Dim countDict = arr.GroupBy(Function(x) x) _.ToDictionary(Function(g) g.Key, Function(g) g.Count())' 分类处理Dim dupKeys As New List(Of String)Dim nonDupKeys As New List(Of String)For Each key In uniqueKeysIf countDict(key) > 1 ThendupKeys.Add(key)ElsenonDupKeys.Add(key)End IfNext有重复的键 = dupKeys.ToArray()无重复的键 = nonDupKeys.ToArray()End SubSub Main()' 测试用例Dim testArr = {"a", "a", "b", "b", "c"}Dim allKeys(), dupKeys(), nonDupKeys() As StringClassifyArray(testArr, allKeys, dupKeys, nonDupKeys)Console.WriteLine("所有键: " & String.Join(",", allKeys))Console.WriteLine("有重复的键: " & String.Join(",", dupKeys))Console.WriteLine("无重复的键: " & String.Join(",", nonDupKeys))End Sub
End Module