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切片的描述部分的修正 (#545)

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* Update 07.4.md

* Update 07.2.md

修改切片的描述。
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家伟 刘
2018-10-16 10:00:56 +08:00
committed by 无闻
parent 3618ac6047
commit d731e97104
1 changed files with 2 additions and 2 deletions
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eBook/07.4.md
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@@ -78,9 +78,9 @@ a = a[0:4] // ref of subarray {5,6,7,8} - len(a) is now 4 but cap(a) is still 5
**问题 7.7**
1) 如果 a 是一个切片，那么 `s[n:n]` 的长度是多少？
1) 如果 a 是一个切片，那么 `a[n:n]` 的长度是多少？
2) `s[n:n+1]` 的长度又是多少？
2) `a[n:n+1]` 的长度又是多少？
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