cl-aux 4.2.0

Provides elements that describe collections
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# Auxiliary elements for collections

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Provides well-defined traits with single methods that enable the achievement of maximum flexibility and freedom in several different operations instead of imposing abstract subsets.

```rust
use cl_aux::Length;

struct SomeCustomArray([i32; 2], [i32; 4]);

impl Length for SomeCustomArray {
  fn length(&self) -> usize {
    self.0.length() + self.1.length()
  }
}

fn main() {
  let v = SomeCustomArray([1, 2], [3, 4, 5, 6]);
  assert_eq!(v.length(), 6);
}
```

Also provides structures for common use-cases.

```rust
use cl_aux::ArrayWrapper;

fn main() {
  let _array: [usize; 1] = ArrayWrapper::from_fn(|idx| idx).0;
}
```