frame_suite::virtuals

Function set_index

Source 
fn set_index<C, T>(v: &mut C, index: usize, value: T)
where
    C: Indexable<T> + Growable<T>,
    T: Default,
Expand description

Sets the value at a given index in a collection.

If the index is out of bounds, the collection is automatically extended with default values (T::default()) up to the required index.

§Behavior

  • If index < current length, the value is simply updated.
  • If index >= current length, the collection is resized by filling missing positions with default values, then the value is set.

§Type Parameters

  • C: A collection that supports indexing and extension.
  • T: The element type, which must implement Default.

§Example

If the collection has length 3 and you set index 5:

  • Elements at index 3 and 4 will be filled with T::default().
  • Index 5 will be assigned the given value.