Map<K, V>.from constructor
- Map other
Creates a LinkedHashMap with the same keys and values as other
.
The keys must all be instances of K
and the values of V
. The other
map itself can have any type, unlike for Map.of, and the key and value types are checked (and can fail) at run-time.
Prefer using Map.of when possible, and only use Map.from
to create a new map with more precise types than the original, and when it's known that all the keys and values have those more precise types.
A LinkedHashMap
requires the keys to implement compatible operator==
and hashCode
. It iterates in key insertion order.
Implementation
factory Map.from(Map other) = LinkedHashMap<K, V>.from;
© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dart.dev/stable/2.13.0/dart-core/Map/Map.from.html