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use crate::{
core::prelude::*,
errors::prelude::*,
validators::prelude::*,
};
/// `ArrayTrait` - Array Create functions
pub trait ArrayCreate<T: ArrayElement> where Self: Sized + Clone {
/// Creates new array
///
/// # Arguments
///
/// * `elements` - vector representing array elements
/// * `shape` - vector representing array elements
///
/// # Examples
///
/// ```
/// use arr_rs::prelude::*;
///
/// let arr = Array::new(vec![1, 2, 3, 4], vec![4]).unwrap();
/// assert_eq!("[1, 2, 3, 4]", format!("{arr}"));
///
/// let arr = Array::new(vec![1, 2, 3, 4], vec![2, 2]).unwrap();
/// assert_eq!("[[1, 2], [3, 4]]", format!("{arr}"));
/// assert_eq!("[[1, 2],\n [3, 4]]", format!("{arr:#}"));
/// ```
///
/// # Errors
///
/// may returns `ArrayError`
fn new(elements: Vec<T>, shape: Vec<usize>) -> Result<Self, ArrayError>;
/// Creates new array
///
/// # Arguments
///
/// * `elements` - vector representing array elements
/// * `shape` - vector representing array elements
///
/// # Examples
///
/// ```
/// use arr_rs::prelude::*;
///
/// let arr = Array::create(vec![1, 2, 3, 4], vec![4], None).unwrap();
/// assert_eq!("[1, 2, 3, 4]", format!("{arr}"));
///
/// let arr = Array::create(vec![1, 2, 3, 4], vec![2, 2], Some(1)).unwrap();
/// assert_eq!("[[1, 2], [3, 4]]", format!("{arr}"));
/// assert_eq!("[[1, 2],\n [3, 4]]", format!("{arr:#}"));
///
/// let arr = Array::create(vec![1, 2, 3, 4], vec![2, 2], Some(3)).unwrap();
/// assert_eq!("[[[1, 2], [3, 4]]]", format!("{arr}"));
/// assert_eq!("[[[1, 2],\n [3, 4]]]", format!("{arr:#}"));
/// ```
///
/// # Errors
///
/// may returns `ArrayError`
fn create(elements: Vec<T>, shape: Vec<usize>, ndmin: Option<usize>) -> Result<Self, ArrayError>;
/// Creates new array with single element
///
/// # Arguments
///
/// * `element` - array element
///
/// # Examples
///
/// ```
/// use arr_rs::prelude::*;
///
/// let arr = Array::<i32>::single(1);
/// assert_eq!(vec![1], arr.get_elements().unwrap());
/// assert_eq!(vec![1], arr.get_shape().unwrap());
/// ```
///
/// # Errors
///
/// may returns `ArrayError`
fn single(element: T) -> Result<Self, ArrayError>;
/// Creates new flat array
///
/// # Arguments
///
/// * `elements` - vector representing array elements
///
/// # Examples
///
/// ```
/// use arr_rs::prelude::*;
///
/// assert_eq!(array!(i32, [1, 2, 3, 4]), Array::<i32>::flat(vec![1, 2, 3, 4]));
/// ```
///
/// # Errors
///
/// may returns `ArrayError`
fn flat(elements: Vec<T>) -> Result<Self, ArrayError>;
/// Creates new empty array
///
/// # Examples
///
/// ```
/// use arr_rs::prelude::*;
///
/// assert!(Array::<i32>::empty().is_empty().unwrap());
/// ```
///
/// # Errors
///
/// may returns `ArrayError`
fn empty() -> Result<Self, ArrayError>;
}
impl <T: ArrayElement> ArrayCreate<T> for Array<T> {
fn new(elements: Vec<T>, shape: Vec<usize>) -> Result<Self, ArrayError> {
shape.matches_values_len(&elements)?;
Ok(Self { elements, shape, })
}
fn create(elements: Vec<T>, shape: Vec<usize>, ndmin: Option<usize>) -> Result<Self, ArrayError> {
let ndmin = ndmin.unwrap_or(0);
let array = Self::new(elements, shape.clone());
if ndmin > shape.len() {
let mut new_shape = vec![1; ndmin - shape.len()];
new_shape.extend_from_slice(&shape);
array.reshape(&new_shape)
} else {
array
}
}
fn single(element: T) -> Result<Self, ArrayError> {
Self::new(vec![element], vec![1])
}
fn flat(elements: Vec<T>) -> Result<Self, ArrayError> {
Self::new(elements.clone(), vec![elements.len()])
}
fn empty() -> Result<Self, ArrayError> {
Self::new(vec![], vec![0])
}
}