map method

Returns a new lazy [Iterable] with elements that are created by calling f on each element of this Iterable in iteration order.

Iterable map(
dynamic f(E element)
)

Returns a new lazy [Iterable] with elements that are created by calling f on each element of this Iterable in iteration order.

This method returns a view of the mapped elements. As long as the returned [Iterable] is not iterated over, the supplied function [f] will not be invoked. The transformed elements will not be cached. Iterating multiple times over the the returned [Iterable] will invoke the supplied function [f] multiple times on the same element.

Methods on the returned iterable are allowed to omit calling f on any element where the result isn't needed. For example, [elementAt] may call f only once.