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Use byte string literal syntax

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The byte string literal syntax `b"whatever"` is more idiomatic than
`"whatever".as_bytes()`.
This commit is contained in:
peferron 2015-05-17 21:18:29 -07:00
parent 55c8bacc3a
commit a10d243dd4
1 changed files with 6 additions and 5 deletions
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11
src/doc/trpl/traits.md
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@ -183,7 +183,8 @@ won’t have its methods:
```rust,ignore
let mut f = std::fs::File::open("foo.txt").ok().expect("Couldn’t open foo.txt");
let result = f.write("whatever".as_bytes());
let buf = b"whatever"; // byte string literal. buf: &[u8; 8]
let result = f.write(buf);
# result.unwrap(); // ignore the error
```
@ -191,9 +192,8 @@ Here’s the error:
```text
error: type `std::fs::File` does not implement any method in scope named `write`
let result = f.write("whatever".as_bytes());
^~~~~~~~~~~~~~~~~~~~~~~~~~~~
let result = f.write(buf);
^~~~~~~~~~
```
We need to `use` the `Write` trait first:
@ -202,7 +202,8 @@ We need to `use` the `Write` trait first:
use std::io::Write;
let mut f = std::fs::File::open("foo.txt").ok().expect("Couldn’t open foo.txt");
let result = f.write("whatever".as_bytes());
let buf = b"whatever";
let result = f.write(buf);
# result.unwrap(); // ignore the error
```