description

# Map<K, V>.fromIterables constructor

Map<K, V>.fromIterables(

1. Iterable<K> keys,
2. Iterable<V> values

)

Creates a map associating the given `keys` to the given `values`.

The map construction iterates over `keys` and `values` simultaneously, and adds an entry to the map for each pair of key and value.

    final rings = <bool>[false, false, true, true];
    final planets = <String>{'Earth', 'Mars', 'Jupiter', 'Saturn'};
    final map = Map<String, bool>.fromIterables(planets, rings);
    print(map); // {Earth: false, Mars: false, Jupiter: true, Saturn: true}

If `keys` contains the same object multiple times, the value of the last occurrence overwrites any previous value.

The two Iterables must have the same length.

The created map is a LinkedHashMap. A `LinkedHashMap` requires the keys to implement compatible `operator==` and `hashCode`. It iterates in key insertion order.

## Implementation

    factory Map.fromIterables(Iterable<K> keys, Iterable<V> values) =
        LinkedHashMap<K, V>.fromIterables;