MapEx<D, S> extension

on

• Map<D, S>?

Methods

any(bool predicate(D key, S value)) → bool

Returns true if there is at least one entry that matches the given predicate. predicate must not be null.

filter(bool predicate(MapEntry<D, S> entry)) → Map<D, S>

Returns a new map containing all key-value pairs matching the given predicate. The returned map preserves the entry iteration order of the original map.

getCount([bool predicate(MapEntry<D, S>)?]) → int

Returns the number of entries matching the given predicate or the number of entries when predicate = null.

isMapEmpty() → Map<D, S>

Check is Map Empty or Null, Will default returns an empty Map.

maxBy<R extends Comparable>(R selector(MapEntry<D, S>)) → MapEntry<D, S>?

Returns the first entry yielding the largest value of the given function or null if there are no entries.

maxWith(Comparator<MapEntry<D, S>> comparator) → MapEntry<D, S>?

Returns the first entry having the largest value according to the provided comparator or null if there are no entries.

minBy<R extends Comparable>(R selector(MapEntry<D, S>)) → MapEntry<D, S>?

Returns the first entry yielding the smallest value of the given function or null if there are no entries.

minWith(Comparator<MapEntry<D, S>> comparator) → MapEntry<D, S>?

Returns the first entry having the smallest value according to the provided comparator or null if there are no entries.

predicate(bool predicate(D key, S value)) → bool

Returns true if there is no entries in the map that match the given predicate. predicate must not be null.