Dart SDK
dart:core
Map
length
property
length
Map
Properties
keys
values
length
isEmpty
isNotEmpty
Constructors
Map
from
unmodifiable
identity
fromIterable
fromIterables
Operators
operator []
operator []=
Methods
containsValue
containsKey
putIfAbsent
addAll
remove
clear
forEach
int
length
read-only
The number of key-value pairs in the map.