countBy method
counts the occurrences of values in the list if condition satisified
Example:
list.countBy(fn)
Implementation
Map<dynamic, dynamic> countBy(dynamic Function(dynamic) fn) =>
FxList.countBy(this, fn);
counts the occurrences of values in the list if condition satisified
Example:
list.countBy(fn)
Map<dynamic, dynamic> countBy(dynamic Function(dynamic) fn) =>
FxList.countBy(this, fn);