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Clarify this code sample with less shadowing and more comments

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Carol (Nichols || Goulding) 2016-08-02 17:01:48 -04:00
parent 9152b70a09
commit 8e5bba01d6
1 changed files with 11 additions and 5 deletions
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src/ch04-03-slices.md
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@ -288,13 +288,19 @@ with no loss of functionality:
# &s[..] # &s[..]
# } # }
fn main() { fn main() {
let s = String::from("hello world"); let my_string = String::from("hello world");
let word = first_word(&s[..]);
let s = "hello world"; // first_word works on slices of `String`s
let word = first_word(&s[..]); let word = first_word(&my_string[..]);
let word = first_word(s); // since literals are &strs, this works too! let my_string_literal = "hello world";
// first_word works on slices of string literals
let word = first_word(&my_string_literal[..]);
// since string literals *are* string slices already,
// this works too, without the slice syntax!
let word = first_word(my_string_literal);
} }
``` ```