iterator.rs: remove "Basic usage" text
Only one example is given (for each method)
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@ -89,8 +89,6 @@ pub trait Iterator {
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///
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/// # Examples
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///
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/// Basic usage:
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///
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/// ```
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/// let a = [1, 2, 3];
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///
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@ -249,8 +247,6 @@ pub trait Iterator {
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///
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/// # Examples
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///
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/// Basic usage:
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///
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/// ```
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/// let a = [1, 2, 3];
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/// assert_eq!(a.iter().count(), 3);
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@ -280,8 +276,6 @@ pub trait Iterator {
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///
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/// # Examples
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///
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/// Basic usage:
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///
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/// ```
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/// let a = [1, 2, 3];
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/// assert_eq!(a.iter().last(), Some(&3));
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@ -324,8 +318,6 @@ pub trait Iterator {
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///
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/// # Examples
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///
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/// Basic usage:
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///
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/// ```
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/// #![feature(iter_advance_by)]
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///
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@ -432,8 +424,6 @@ pub trait Iterator {
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///
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/// # Examples
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///
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/// Basic usage:
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///
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/// ```
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/// let a = [0, 1, 2, 3, 4, 5];
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/// let mut iter = a.iter().step_by(2);
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@ -1342,8 +1332,6 @@ pub trait Iterator {
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///
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/// # Examples
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///
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/// Basic usage:
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///
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/// ```
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/// let a = [1, 2, 3];
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///
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@ -1434,8 +1422,6 @@ pub trait Iterator {
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///
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/// # Examples
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///
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/// Basic usage:
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///
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/// ```
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/// let a = [1, 2, 3, 4];
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///
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@ -1486,8 +1472,6 @@ pub trait Iterator {
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///
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/// # Examples
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///
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/// Basic usage:
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///
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/// ```
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/// let words = ["alpha", "beta", "gamma"];
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///
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@ -1765,8 +1749,6 @@ pub trait Iterator {
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///
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/// # Examples
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///
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/// Basic usage:
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///
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/// ```
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/// // an iterator which alternates between Some and None
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/// struct Alternate {
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@ -1911,8 +1893,6 @@ pub trait Iterator {
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///
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/// # Examples
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///
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/// Basic usage:
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///
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/// ```
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/// let mut words = ["hello", "world", "of", "Rust"].into_iter();
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///
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@ -2221,8 +2201,6 @@ pub trait Iterator {
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///
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/// # Examples
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///
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/// Basic usage:
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///
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/// ```
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/// let a = [1, 2, 3];
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///
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@ -3193,8 +3171,6 @@ pub trait Iterator {
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///
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/// # Examples
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///
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/// Basic usage:
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///
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/// ```
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/// let a = [1, 2, 3];
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/// let b: Vec<u32> = Vec::new();
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@ -3232,8 +3208,6 @@ pub trait Iterator {
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///
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/// # Examples
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///
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/// Basic usage:
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///
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/// ```
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/// let a = [1, 2, 3];
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/// let b: Vec<u32> = Vec::new();
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@ -3420,8 +3394,6 @@ pub trait Iterator {
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///
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/// # Examples
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///
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/// Basic usage:
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///
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/// ```
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/// let a = [(1, 2), (3, 4), (5, 6)];
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///
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@ -3458,8 +3430,6 @@ pub trait Iterator {
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///
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/// # Examples
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///
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/// Basic usage:
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///
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/// ```
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/// let a = [1, 2, 3];
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///
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@ -3538,8 +3508,6 @@ pub trait Iterator {
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///
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/// # Examples
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///
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/// Basic usage:
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///
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/// ```
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/// let a = [1, 2, 3];
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///
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@ -3624,8 +3592,6 @@ pub trait Iterator {
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///
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/// # Examples
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///
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/// Basic usage:
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///
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/// ```
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/// let a = [1, 2, 3];
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/// let sum: i32 = a.iter().sum();
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@ -3703,8 +3669,6 @@ pub trait Iterator {
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///
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/// # Examples
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///
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/// Basic usage:
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///
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/// ```
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/// #![feature(iter_order_by)]
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///
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@ -3790,8 +3754,6 @@ pub trait Iterator {
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///
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/// # Examples
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///
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/// Basic usage:
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///
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/// ```
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/// #![feature(iter_order_by)]
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///
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@ -3863,8 +3825,6 @@ pub trait Iterator {
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///
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/// # Examples
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///
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/// Basic usage:
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///
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/// ```
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/// #![feature(iter_order_by)]
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///
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