Map< K, V>.fromIterables constructor
Creates a Map instance associating the given keys
to values
.
The created map is a LinkedHashMap.
A LinkedHashMap
requires the keys to implement compatible
operator==
and hashCode
, and it allows null as a key.
It iterates in key insertion order.
This constructor iterates over keys
and values
and maps each element of
keys
to the corresponding element of values
.
List<String> letters = ['b', 'c'];
List<String> words = ['bad', 'cat'];
Map<String, String> map = new Map.fromIterables(letters, words);
map['b'] + map['c']; // badcat
If keys
contains the same object multiple times, the last occurrence
overwrites the previous value.
The two Iterables must have the same length.
Implementation
factory Map.fromIterables(Iterable<K> keys, Iterable<V> values) =
LinkedHashMap<K, V>.fromIterables;