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auto merge of #14580 : utkarshkukreti/rust/fix-docs-for-result-map, r=alexcrichton 

`reader.read_line()` includes trailing newline char, which makes
`from_str` always return `None`.
This commit is contained in:
bors 2014-06-01 04:36:38 -07:00
parent dfaea70963 cf4864a7a5
commit c605c2b57b
1 changed files with 3 additions and 1 deletions
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4
src/libcore/result.rs
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@ -432,11 +432,13 @@ impl<T, E> Result<T, E> {
/// let line: IoResult<String> = reader.read_line();
/// // Convert the string line to a number using `map` and `from_str`
/// let val: IoResult<int> = line.map(|line| {
/// from_str::<int>(line.as_slice()).unwrap_or(0)
/// from_str::<int>(line.as_slice().trim_right()).unwrap_or(0)
/// });
/// // Add the value if there were no errors, otherwise add 0
/// sum += val.ok().unwrap_or(0);
/// }
///
/// assert!(sum == 10);
/// ~~~
#[inline]
pub fn map<U>(self, op: |T| -> U) -> Result<U,E> {