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Showing content from http://arrayfire.github.io/arrayfire-rust/arrayfire/fn.any_true_by_key.html below:

arrayfire::any_true_by_key - Rust

pub fn any_true_by_key<KeyType, ValueType>(
    keys: &Array<KeyType>, 
    vals: &Array<ValueType>, 
    dim: i32
) -> (Array<KeyType>, Array<ValueType::AggregateOutType>) where
    KeyType: ReduceByKeyInput,
    ValueType: HasAfEnum,
    ValueType::AggregateOutType: HasAfEnum, 

Key based OR of elements along a given dimension

All positive non-zero values are considered true, while negative and zero values are considered as false.

• keys - key Array
• vals - value Array
• dim - Dimension along which the input Array is reduced

Tuple of Arrays, with output keys and values after reduction

use arrayfire::{Dim4, print, randu, any_true_by_key};
let dims = Dim4::new(&[5, 3, 1, 1]);
let vals = randu::<f32>(dims);
let keys = randu::<u32>(Dim4::new(&[5, 1, 1, 1]));
print(&vals);
print(&keys);
let (out_keys, out_vals) = any_true_by_key(&keys, &vals, 0);
print(&out_keys);
print(&out_vals);

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