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rayon.rs
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rayon.rs
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extern crate rayon;
extern crate ndarray;
extern crate ndarray_parallel;
use ndarray::prelude::*;
use ndarray_parallel::prelude::*;
const M: usize = 1024 * 10;
const N: usize = 100;
#[test]
fn test_axis_iter() {
let mut a = Array2::<f64>::zeros((M, N));
for (i, mut v) in a.axis_iter_mut(Axis(0)).enumerate() {
v.fill(i as _);
}
assert_eq!(a.axis_iter(Axis(0)).len(), M);
let s: f64 = a.axis_iter(Axis(0)).into_par_iter().map(|x| x.sum()).sum();
println!("{:?}", a.slice(s![..10, ..5]));
assert_eq!(s, a.sum());
}
#[test]
fn test_axis_iter_mut() {
let mut a = Array::linspace(0., 1.0f64, M * N).into_shape((M, N)).unwrap();
let b = a.mapv(|x| x.exp());
a.axis_iter_mut(Axis(0)).into_par_iter().for_each(|mut v| v.mapv_inplace(|x| x.exp()));
println!("{:?}", a.slice(s![..10, ..5]));
assert!(a.all_close(&b, 0.001));
}
#[test]
fn test_regular_iter() {
let mut a = Array2::<f64>::zeros((M, N));
for (i, mut v) in a.axis_iter_mut(Axis(0)).enumerate() {
v.fill(i as _);
}
let s: f64 = a.view().into_par_iter().map(|&x| x).sum();
println!("{:?}", a.slice(s![..10, ..5]));
assert_eq!(s, a.sum());
}
#[test]
fn test_regular_iter_collect() {
let mut a = Array2::<f64>::zeros((M, N));
for (i, mut v) in a.axis_iter_mut(Axis(0)).enumerate() {
v.fill(i as _);
}
let v = a.view().into_par_iter().map(|&x| x).collect::<Vec<_>>();
assert_eq!(v.len(), a.len());
}