From 3f61a327c1a591f1e3b32b542a921762f5ffb15c Mon Sep 17 00:00:00 2001
From: Sanchime <sanchime.qq.com>
Date: Thu, 12 May 2022 22:27:31 +0800
Subject: [PATCH] =?UTF-8?q?=E6=9B=B4=E6=96=B0IEnumerable=E6=89=A9=E5=B1=95?=
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---
 Sanchime.Functional/Extensions/IEnumerable.cs | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/Sanchime.Functional/Extensions/IEnumerable.cs b/Sanchime.Functional/Extensions/IEnumerable.cs
index ef5e4b7..f60e8a8 100644
--- a/Sanchime.Functional/Extensions/IEnumerable.cs
+++ b/Sanchime.Functional/Extensions/IEnumerable.cs
@@ -93,11 +93,20 @@ public static class IEnumerableExtension
     public static IEnumerable<Unit> ForEach<T>(this IEnumerable<T> source, Action<T> action)
         => source.Map(action.ToFunc()).ToImmutableList();
 
-    public static IEnumerable<R> Bind<T, R>(this IEnumerable<T> source, Func<T, IEnumerable<R>> func)
-        => source.SelectMany(func);
+    public static IEnumerable<R> Bind<T, R>(this IEnumerable<T> source, Func<T, IEnumerable<R>> binding)
+        => source.SelectMany(binding);
 
-    public static IEnumerable<R> Bind<T, R>(this IEnumerable<T> source, Func<T, Option<R>> func)
-        => source.Bind(t => func(t).AsEnumerable());
+    public static IEnumerable<R> Bind<T, R>(this IEnumerable<T> source, Func<T, Option<R>> binding)
+        => source.Bind(val => binding(val).AsEnumerable());
+
+    /// <summary>
+    /// 将二级序列平展
+    /// </summary>
+    /// <param name="source"></param>
+    /// <typeparam name="T"></typeparam>
+    /// <returns></returns>
+    public static IEnumerable<T> Flatten<T>(this IEnumerable<IEnumerable<T>> source)
+        => source.SelectMany(x => x);
 
 
     private static IEnumerable<T> List<T>(T t)