From 5c830aed32f05e8e5ec101a6552df836c8a61dd7 Mon Sep 17 00:00:00 2001
From: "max.liu" <7415463+kelin418@user.noreply.gitee.com>
Date: Mon, 6 Apr 2020 19:18:22 +0800
Subject: [PATCH] =?UTF-8?q?update=20src/react/ReactChildren.js.=20?=
 =?UTF-8?q?=E5=AE=9E=E7=8E=B0=E7=AE=80=E6=98=93=E7=9A=84Children.map,?=
 =?UTF-8?q?=E6=94=AF=E6=8C=81=E8=87=AA=E5=8A=A8=E7=94=9F=E6=88=90key.?=
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---
 src/react/ReactChildren.js | 26 ++++++++++++++++++++++++--
 1 file changed, 24 insertions(+), 2 deletions(-)

diff --git a/src/react/ReactChildren.js b/src/react/ReactChildren.js
index bbc07d8..4dddcfe 100644
--- a/src/react/ReactChildren.js
+++ b/src/react/ReactChildren.js
@@ -1,6 +1,28 @@
 function mapChildren(children, func, context) {
-    //TODO实现此mapChildren方法
-    return children;
+	var result = [];
+	if (!Array.isArray(children)) children = [children];
+
+	function getKey(prefix, idx, has) {
+		var key = prefix + idx;
+		if (has) key += ":";
+		return key;
+	}
+	function flatten(ary, prefix = ".") {
+		ary.forEach((item, idx) => {
+			if (Array.isArray(item)) flatten(item, getKey(prefix, idx, item.length > 1));
+			else {
+				let temp = func.call(context, item, idx);
+				if (!Array.isArray(temp)) temp = [temp];
+				temp.forEach((val, i) => {
+					let key = prefix + (item.key ? "$" + item.key : idx) + "/." + (val.key ? "$" + val.key : i);
+					val = cloneElement(val, { key });
+					result.push(val);
+				});
+			}
+		});
+	}
+	flatten(children);
+	return result;
 }
 
 export {
-- 
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