ListExtensions<T> extension

on

• Iterable<T>?

Methods

averageBy(num selector(T)) → double?

Example:

forEachIndexed(void action(T element, int index)) → void

Generate forEach but gives index for each element

sumBy(int selector(T)) → int

Example:

sumByDouble(num selector(T)) → double

Example:

validate() → List<T>

Validate given List is not null and returns blank list if null. This should not be used to clear list