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Fixed erroneous statements in iterators.md.

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Alexander Bliskovsky 2015-02-22 20:06:25 -05:00
parent 72eaf2c30e
commit 9f2b0671f8
1 changed files with 5 additions and 8 deletions
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13
src/doc/trpl/iterators.md
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@ -91,11 +91,11 @@ for num in &nums {
```
Now we're explicitly dereferencing `num`. Why does `&nums` give us
references? Because we asked it to with `&`. If we had not had the
`&`, `nums` would have been moved into the `for` loop and consumed,
and we we would no longer be able to access `nums` afterward. With
references, we're just borrowing a reference to the data, and so it's
just passing a reference, without needing to do the move.
references? Firstly, because we explicitly asked it to with
`&`. Secondly, if it gave us the data itself, we would have to be its
owner, which would involve making a copy of the data and giving us the
copy. With references, we're just borrowing a reference to the data,
and so it's just passing a reference, without needing to do the move.
So, now that we've established that ranges are often not what you want, let's
talk about what you do want instead.
@ -242,9 +242,6 @@ for num in nums.iter() {
}
```
Sometimes you need this functionality, but since for loops operate on the
`IntoIterator` trait, calling `.iter()` is rarely necessary.
These two basic iterators should serve you well. There are some more
advanced iterators, including ones that are infinite. Like `count`: