From 3078fb8eeaaa0a7e4200e6a0c2eb5e7835ea5bb4 Mon Sep 17 00:00:00 2001
From: bqlin <bqlins@163.com>
Date: Sun, 19 Dec 2021 17:22:04 +0800
Subject: [PATCH] =?UTF-8?q?0001.=E4=B8=A4=E6=95=B0=E4=B9=8B=E5=92=8C?=
 =?UTF-8?q?=EF=BC=9A=E7=AE=80=E5=8C=96Swift=E5=AE=9E=E7=8E=B0?=
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---
 problems/0001.两数之和.md | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/problems/0001.两数之和.md b/problems/0001.两数之和.md
index 37c95736..8551274c 100644
--- a/problems/0001.两数之和.md
+++ b/problems/0001.两数之和.md
@@ -207,18 +207,16 @@ function twoSum(array $nums, int $target): array
 Swift：
 ```swift
 func twoSum(_ nums: [Int], _ target: Int) -> [Int] {
-    var res = [Int]()
-    var dict = [Int : Int]()
-    for i in 0 ..< nums.count {
-        let other = target - nums[i]
-        if dict.keys.contains(other) {
-            res.append(i)
-            res.append(dict[other]!)
-            return res
+    // 值: 下标
+    var map = [Int: Int]()
+    for (i, e) in nums.enumerated() {
+        if let v = map[target - e] {
+            return [v, i]
+        } else {
+            map[e] = i
         }
-        dict[nums[i]] = i
     }
-    return res
+    return []
 }
 ```