校对: chapter2/03_Strings_and_Characters 方法名变化 (#921)

index(of:) 已更名为: firstIndex(of:)
2019-04-12 10:32:20 +08:00
parent 86690d4472
commit 9fd540b8d7
1 changed files with 1 additions and 1 deletions
--- a/source/chapter2/03_Strings_and_Characters.md
+++ b/source/chapter2/03_Strings_and_Characters.md
@ -434,7 +434,7 @@ welcome.removeSubrange(range)

 ```swift
 let greeting = "Hello, world!"
-let index = greeting.index(of: ",") ?? greeting.endIndex
+let index = greeting.firstIndex(of: ",") ?? greeting.endIndex
 let beginning = greeting[..<index]
 // beginning 的值为 "Hello"