本文介绍: 主要为迭代器的拓展方法, 为了方便使用
using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using UnityEngine;
/// <summary>迭代器扩展方法</summary>
[DebuggerStepThrough]
public static class EnumerableExtension
{
/// <summary> 遍历操作 </summary>
public static void ForEach<T>(this IEnumerable<T> values, Action<T> action)
{
foreach (T ele in values)
action(ele);
}
/// <summary> 遍历操作 </summary>
public static void ForEach(this IEnumerable values, Action<object> action)
{
foreach (object ele in values)
action(ele);
}
/// <summary> 计数</summary>
public static int CountOf<T>(this IEnumerable<T> values, Predicate<T> match)
{
int ret = 0;
foreach (T ele in values)
ret += match(ele) ? 1 : 0;
return ret;
}
/// <summary> 计数</summary>
public static int CountOf(this IEnumerable values, Predicate<object> match)
{
int ret = 0;
foreach (object ele in values)
ret += match(ele) ? 1 : 0;
return ret;
}
/// <summary> 查找</summary>
public static T Find<T>(this IEnumerable<T> values, Predicate<T> match)
{
foreach (var ele in values)
{
if (match(ele)) return ele;
}
return default;
}
/// <summary> 查找</summary>
public static object Find(this IEnumerable values, Predicate<object> match)
{
foreach (object ele in values)
{
if (match(ele)) return ele;
}
return default;
}
/// <summary> 查找</summary>
public static T Find<T>(this IEnumerable<T> values, int index)
{
foreach(var ele in values)
{
if (index-- == 0)
return ele;
}
return default;
}
/// <summary> 查找下标</summary>
public static int FindIndex<T>(this IEnumerable<T> values, T data)
{
int i = 0;
foreach (var ele in values)
{
if (ele.Equals(data))
return i;
++i;
}
return -1;
}
/// <summary> 查找下标</summary>
public static int FindIndex<T>(this IEnumerable<T> values, Predicate<T> match)
{
int i = 0;
foreach (T ele in values)
{
if (match(ele))
return i;
++i;
}
return -1;
}
/// <summary> 查找下标</summary>
public static int FindIndex(this IEnumerable values, Predicate<object> match)
{
int i = 0;
foreach (object ele in values)
{
if (match(ele))
return i;
++i;
}
return -1;
}
/// <summary>查找全部</summary>
public static List<T> FindAll<T>(this IEnumerable<T> values, Predicate<T> match)
{
List<T> ret = new List<T>();
foreach (T ele in values)
if (match(ele))
ret.Add(ele);
return ret;
}
/// <summary>是否存在</summary>
public static bool Exist<T>(this IEnumerable<T> values, Predicate<T> match)
{
return values.FindIndex(match) != -1;
}
/// <summary> 是否为空</summary>
public static bool Empty(this IEnumerable values) => !values.GetEnumerator().MoveNext();
/// <summary> 转化为目标数组</summary>
public static List<object[]> ToObjectArr(this IEnumerable values)
{
List<object[]> ret = new List<object[]>(values is ICollection c ? c.Count : 4);
foreach (object ele in values)
ret.Add(new object[] { ele });
return ret;
}
/// <summary> 转化为目标数组</summary>
public static List<object[]> ToObjectArr<T, TOut>(this IEnumerable<T> values, Func<T, TOut> func)
{
List<object[]> ret = new List<object[]>(values is ICollection c ? c.Count : 4);
foreach (T ele in values)
ret.Add(new object[] { ele, func.Invoke(ele) });
return ret;
}
}
原文地址:https://blog.csdn.net/KamikazePilot/article/details/136025642
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