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Update 07.6.md (#647)

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marjune
2019-07-11 12:16:43 +08:00
committed by ᴊ. ᴄʜᴇɴ
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@@ -27,7 +27,7 @@ func main() {
可以通过代码 `len([]int32(s))` 来获得字符串中字符的数量，但使用 `utf8.RuneCountInString(s)` 效率会更高一点。(参考[count_characters.go](exercises/chapter_4/count_characters.go)) 可以通过代码 `len([]int32(s))` 来获得字符串中字符的数量，但使用 `utf8.RuneCountInString(s)` 效率会更高一点。(参考[count_characters.go](exercises/chapter_4/count_characters.go))
您还可以将一个字符串追加到某一个字符数组的尾部： 您还可以将一个字符串追加到某一个字节切片的尾部：
```go ```go
var b []byte var b []byte