2013-06-16 07:34:09 +00:00
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// Copyright 2013 The Lmath Developers. For a full listing of the authors,
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// refer to the AUTHORS file at the top-level directory of this distribution.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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2013-07-08 08:17:36 +00:00
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use std::cast;
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2013-07-08 07:00:38 +00:00
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use core::{Vec2, Vec3};
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2013-06-16 07:34:09 +00:00
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/// A geometric point
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pub trait Point<T,V>: Eq + ApproxEq<T> + ToStr {
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2013-07-08 08:17:36 +00:00
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pub fn from_vec(vec: V) -> Self;
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pub fn as_vec<'a>(&'a self) -> &'a V;
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pub fn as_mut_vec<'a>(&'a mut self) -> &'a mut V;
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2013-06-16 07:34:09 +00:00
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pub fn translate(&self, offset: &V) -> Self;
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pub fn distance(&self, other: &Self) -> T;
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}
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/// A two-dimensional point
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2013-06-29 06:38:55 +00:00
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#[deriving(Clone, Eq)]
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2013-07-08 08:17:36 +00:00
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pub struct Point2<T> { x: T, y: T }
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2013-06-16 07:34:09 +00:00
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impl<T> Point2<T> {
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2013-07-08 08:17:36 +00:00
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#[inline]
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2013-06-16 07:34:09 +00:00
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pub fn new(x: T, y: T) -> Point2<T> {
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2013-07-08 08:17:36 +00:00
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Point2 { x: x, y: y }
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2013-06-16 07:34:09 +00:00
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}
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}
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2013-07-08 08:17:36 +00:00
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impl<T:Clone + Float> Point<T,Vec2<T>> for Point2<T> {
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#[inline]
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pub fn from_vec(vec: Vec2<T>) -> Point2<T> {
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unsafe { cast::transmute(vec) }
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}
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#[inline]
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pub fn as_vec<'a>(&'a self) -> &'a Vec2<T> {
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unsafe { cast::transmute(self) }
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}
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#[inline]
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pub fn as_mut_vec<'a>(&'a mut self) -> &'a mut Vec2<T> {
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unsafe { cast::transmute(self) }
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}
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#[inline]
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pub fn translate(&self, offset: &Vec2<T>) -> Point2<T> {
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Point::from_vec(self.as_vec().add_v(offset))
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2013-06-16 07:34:09 +00:00
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}
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2013-07-08 08:17:36 +00:00
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#[inline]
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2013-06-16 07:34:09 +00:00
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pub fn distance(&self, other: &Point2<T>) -> T {
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self.as_vec().distance(other.as_vec())
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2013-06-16 07:34:09 +00:00
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}
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}
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2013-07-08 07:00:38 +00:00
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impl<T:Clone + Eq + ApproxEq<T>> ApproxEq<T> for Point2<T> {
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#[inline]
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pub fn approx_epsilon() -> T {
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ApproxEq::approx_epsilon::<T,T>()
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}
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#[inline]
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pub fn approx_eq(&self, other: &Point2<T>) -> bool {
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self.approx_eq_eps(other, &ApproxEq::approx_epsilon::<T,T>())
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}
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#[inline]
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pub fn approx_eq_eps(&self, other: &Point2<T>, epsilon: &T) -> bool {
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2013-07-08 08:17:36 +00:00
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self.x.approx_eq_eps(&other.x, epsilon) &&
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self.y.approx_eq_eps(&other.y, epsilon)
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2013-07-08 07:00:38 +00:00
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}
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}
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2013-06-16 07:34:09 +00:00
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impl<T> ToStr for Point2<T> {
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pub fn to_str(&self) -> ~str {
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fmt!("[%?, %?]", self.x, self.y)
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}
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}
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2013-07-08 07:00:38 +00:00
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#[cfg(test)]
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mod test_point2 {
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use geom::point::*;
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#[test]
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fn test_to_str() {
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assert_eq!(Point2::new(1, 2).to_str(), ~"[1, 2]");
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}
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}
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2013-06-16 07:34:09 +00:00
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/// A three-dimensional point
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2013-06-29 06:38:55 +00:00
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#[deriving(Clone, Eq)]
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pub struct Point3<T> { x: T, y: T, z: T }
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2013-06-16 07:34:09 +00:00
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impl<T> Point3<T> {
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2013-07-08 08:17:36 +00:00
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#[inline]
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pub fn new(x: T, y: T, z: T) -> Point3<T> {
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Point3 { x: x, y: y, z: z }
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}
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}
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2013-07-08 08:17:36 +00:00
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impl<T:Clone + Float> Point<T,Vec3<T>> for Point3<T> {
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#[inline]
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pub fn from_vec(vec: Vec3<T>) -> Point3<T> {
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unsafe { cast::transmute(vec) }
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}
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#[inline]
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pub fn as_vec<'a>(&'a self) -> &'a Vec3<T> {
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unsafe { cast::transmute(self) }
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}
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#[inline]
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pub fn as_mut_vec<'a>(&'a mut self) -> &'a mut Vec3<T> {
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unsafe { cast::transmute(self) }
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}
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#[inline]
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pub fn translate(&self, offset: &Vec3<T>) -> Point3<T> {
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2013-07-08 08:17:36 +00:00
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Point::from_vec(self.as_vec().add_v(offset))
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2013-06-16 07:34:09 +00:00
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}
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2013-07-08 08:17:36 +00:00
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#[inline]
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pub fn distance(&self, other: &Point3<T>) -> T {
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2013-07-08 08:17:36 +00:00
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self.as_vec().distance(other.as_vec())
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2013-06-16 07:34:09 +00:00
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}
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}
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2013-07-08 07:00:38 +00:00
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impl<T:Clone + Eq + ApproxEq<T>> ApproxEq<T> for Point3<T> {
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#[inline]
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pub fn approx_epsilon() -> T {
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ApproxEq::approx_epsilon::<T,T>()
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2013-06-16 07:34:09 +00:00
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}
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2013-07-08 07:00:38 +00:00
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#[inline]
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pub fn approx_eq(&self, other: &Point3<T>) -> bool {
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self.approx_eq_eps(other, &ApproxEq::approx_epsilon::<T,T>())
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}
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2013-06-16 07:34:09 +00:00
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2013-07-08 07:00:38 +00:00
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#[inline]
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pub fn approx_eq_eps(&self, other: &Point3<T>, epsilon: &T) -> bool {
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2013-07-08 08:17:36 +00:00
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self.x.approx_eq_eps(&other.x, epsilon) &&
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self.y.approx_eq_eps(&other.y, epsilon) &&
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self.z.approx_eq_eps(&other.z, epsilon)
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2013-07-08 07:00:38 +00:00
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}
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}
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impl<T> ToStr for Point3<T> {
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pub fn to_str(&self) -> ~str {
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fmt!("[%?, %?, %?]", self.x, self.y, self.z)
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2013-06-16 07:34:09 +00:00
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}
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}
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#[cfg(test)]
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mod test_point3 {
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2013-07-08 07:00:38 +00:00
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use geom::point::*;
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2013-06-16 07:34:09 +00:00
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#[test]
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fn test_to_str() {
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assert_eq!(Point3::new(1, 2, 3).to_str(), ~"[1, 2, 3]");
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}
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}
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