# HashMap<K, V>.fromIterable constructor

HashMap<K, V>.fromIterable(Iterable iterable, { K key(dynamic element), V value(dynamic element) })

Creates a HashMap where the keys and values are computed from the `iterable`.

For each element of the `iterable` this constructor computes a key/value pair, by applying `key` and `value` respectively.

The keys of the key/value pairs do not need to be unique. The last occurrence of a key will simply overwrite any previous value.

If no values are specified for `key` and `value` the default is the identity function.

## Implementation

    factory HashMap.fromIterable(Iterable iterable,
        {K key(element), V value(element)}) {
      Map<K, V> map = HashMap<K, V>();
      MapBase._fillMapWithMappedIterable(map, iterable, key, value);
      return map;
    }