Struct ForEach 

pub struct ForEach<C, F, V>
where
    C: Collection,
    C::Item: Identifiable,
    F: Fn(C::Item) -> V,
    V: View,
{ /* private fields */ }

A utility for transforming elements of a collection with a mapping function.

ForEach applies a transformation function to each element of a source collection, producing a new collection with the transformed elements. This is useful for transforming data models into view representations.

Implementations

impl<C, F, V> ForEach<C, F, V>

where C: Collection, C::Item: Identifiable, F: Fn(C::Item) -> V, V: View,

pub const fn new(data: C, generator: F) -> Self

Creates a new ForEach transformation with the provided data collection and generator function.

Parameters

• data - The source collection containing elements to be transformed
• generator - A function that transforms elements from the source collection

Returns

A new ForEach instance that will apply the transformation when accessed

pub fn into_inner(self) -> (C, F)

Consumes the ForEach and returns the original data collection and generator function.

Returns

A tuple containing the original data collection and generator function

Trait Implementations

impl<C, F, V> Clone for ForEach<C, F, V>

where C: Collection + Clone, C::Item: Identifiable, F: Fn(C::Item) -> V + Clone, V: View + Clone,

fn clone(&self) -> ForEach<C, F, V>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<C, F, V> Collection for ForEach<C, F, V>

where C: Collection, C::Item: Identifiable, F: 'static + Fn(C::Item) -> V, V: View,

type Item = <<C as Collection>::Item as Identifiable>::Id

The type of items stored in the collection.

type Guard = <C as Collection>::Guard

The type of guard returned when registering a watcher.

fn get(&self, index: usize) -> Option<Self::Item>

Gets an item from the collection at the specified index.

fn len(&self) -> usize

Returns the number of items in the collection.

fn watch( &self, range: impl RangeBounds<usize>, watcher: impl for<'a> Fn(Context<&'a [Self::Item]>) + 'static, ) -> Self::Guard

Registers a watcher for changes in the specified range of the collection.

fn is_empty(&self) -> bool

Returns true if the collection contains no elements.

impl<C, F, V> Debug for ForEach<C, F, V>

where C: Collection + Debug, C::Item: Identifiable, F: Fn(C::Item) -> V + Debug, V: View + Debug,

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<C, F, V> Views for ForEach<C, F, V>

where C: Collection, C::Item: Identifiable, F: 'static + Fn(C::Item) -> V, V: View,

type Id = <<C as Collection>::Item as Identifiable>::Id

The type of unique identifier for items in the collection. Must implement Hash and Ord to ensure uniqueness and ordering.

type View = V

The view type that this collection produces for each element.

type Guard = <C as Collection>::Guard

The type of guard returned when registering a watcher.

fn get_id(&self, index: usize) -> Option<Self::Id>

Returns the unique identifier for the item at the specified index, or None if out of bounds.

fn get_view(&self, index: usize) -> Option<Self::View>

Returns the view at the specified index, or None if the index is out of bounds.

fn len(&self) -> usize

Returns the number of items in the collection.

fn watch( &self, range: impl RangeBounds<usize>, watcher: impl for<'a> Fn(Context<&'a [Self::Id]>) + 'static, ) -> Self::Guard

Registers a watcher for changes in the specified range of the collection.

fn is_empty(&self) -> bool

Returns true if the collection contains no elements.