Convert vec::{grow, grow_fn, grow_set} to methods.
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@ -20,7 +20,6 @@ use std::cmp;
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use std::container::{Container, Mutable, Map, Set};
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use std::uint;
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use std::util::replace;
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use std::vec;
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#[allow(missing_doc)]
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pub struct SmallIntMap<T> {
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@ -86,7 +85,7 @@ impl<V> Map<uint, V> for SmallIntMap<V> {
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let exists = self.contains_key(&key);
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let len = self.v.len();
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if len <= key {
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vec::grow_fn(&mut self.v, key - len + 1, |_| None);
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self.v.grow_fn(key - len + 1, |_| None);
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}
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self.v[key] = Some(value);
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!exists
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@ -363,63 +363,6 @@ pub fn append_one<T>(lhs: ~[T], x: T) -> ~[T] {
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v
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}
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/**
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* Expands a vector in place, initializing the new elements to a given value
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*
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* # Arguments
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*
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* * v - The vector to grow
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* * n - The number of elements to add
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* * initval - The value for the new elements
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*/
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pub fn grow<T:Copy>(v: &mut ~[T], n: uint, initval: &T) {
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let new_len = v.len() + n;
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v.reserve_at_least(new_len);
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let mut i: uint = 0u;
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while i < n {
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v.push(copy *initval);
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i += 1u;
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}
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}
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/**
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* Expands a vector in place, initializing the new elements to the result of
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* a function
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*
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* Function `init_op` is called `n` times with the values [0..`n`)
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*
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* # Arguments
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*
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* * v - The vector to grow
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* * n - The number of elements to add
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* * init_op - A function to call to retreive each appended element's
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* value
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*/
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pub fn grow_fn<T>(v: &mut ~[T], n: uint, op: &fn(uint) -> T) {
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let new_len = v.len() + n;
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v.reserve_at_least(new_len);
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let mut i: uint = 0u;
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while i < n {
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v.push(op(i));
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i += 1u;
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}
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}
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/**
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* Sets the value of a vector element at a given index, growing the vector as
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* needed
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*
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* Sets the element at position `index` to `val`. If `index` is past the end
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* of the vector, expands the vector by replicating `initval` to fill the
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* intervening space.
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*/
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pub fn grow_set<T:Copy>(v: &mut ~[T], index: uint, initval: &T, val: T) {
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let l = v.len();
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if index >= l { grow(&mut *v, index - l + 1u, initval); }
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v[index] = val;
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}
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// Functional utilities
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/// Apply a function to each element of a vector and return the results
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@ -1648,9 +1591,26 @@ impl<T> OwnedVector<T> for ~[T] {
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(lefts, rights)
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}
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#[inline]
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/**
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* Expands a vector in place, initializing the new elements to the result of
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* a function
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*
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* Function `init_op` is called `n` times with the values [0..`n`)
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*
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* # Arguments
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*
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* * n - The number of elements to add
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* * init_op - A function to call to retreive each appended element's
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* value
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*/
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fn grow_fn(&mut self, n: uint, op: &fn(uint) -> T) {
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grow_fn(self, n, op);
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let new_len = self.len() + n;
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self.reserve_at_least(new_len);
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let mut i: uint = 0u;
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while i < n {
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self.push(op(i));
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i += 1u;
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}
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}
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}
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@ -1687,14 +1647,37 @@ impl<T:Copy> OwnedCopyableVector<T> for ~[T] {
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}
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}
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#[inline]
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/**
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* Expands a vector in place, initializing the new elements to a given value
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*
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* # Arguments
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*
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* * n - The number of elements to add
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* * initval - The value for the new elements
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*/
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fn grow(&mut self, n: uint, initval: &T) {
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grow(self, n, initval);
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let new_len = self.len() + n;
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self.reserve_at_least(new_len);
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let mut i: uint = 0u;
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while i < n {
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self.push(copy *initval);
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i += 1u;
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}
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}
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#[inline]
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/**
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* Sets the value of a vector element at a given index, growing the vector as
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* needed
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*
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* Sets the element at position `index` to `val`. If `index` is past the end
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* of the vector, expands the vector by replicating `initval` to fill the
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* intervening space.
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*/
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fn grow_set(&mut self, index: uint, initval: &T, val: T) {
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grow_set(self, index, initval, val);
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let l = self.len();
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if index >= l { self.grow(index - l + 1u, initval); }
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self[index] = val;
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}
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}
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@ -69,9 +69,7 @@ fn AsciiArt(width: uint, height: uint, fill: char) -> AsciiArt {
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// blank characters for each position in our canvas.
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let mut lines = do vec::build_sized(height) |push| {
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for height.times {
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let mut line = ~[];
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vec::grow_set(&mut line, width-1, &'.', '.');
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push(line);
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push(vec::from_elem(width, '.'));
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}
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};
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