NullableMapExtensions<K, V> extension

Provides an extension method for Map that is nullable.

NullableなMap用の拡張メソッドを提供します。

on

• Map<K, V>?

Properties

isEmpty → bool

Available on Map<K, V>?, provided by the NullableMapExtensions extension

Whether there is no key/value pair in the map.

no setter

isNotEmpty → bool

Available on Map<K, V>?, provided by the NullableMapExtensions extension

Whether there is at least one key/value pair in the map.

no setter

length → int

Available on Map<K, V>?, provided by the NullableMapExtensions extension

The number of key/value pairs in the map.

no setter

Methods

containsKey(Object? key) → bool

Available on Map<K, V>?, provided by the NullableMapExtensions extension

Whether this map contains the given key.

containsKeyAll(Iterable<Object?> keys) → bool

Available on Map<K, V>?, provided by the NullableMapExtensions extension

Returns true if all keys are included in the keys of Map.

containsKeyAny(Iterable<Object?> keys) → bool

Available on Map<K, V>?, provided by the NullableMapExtensions extension

Returns true if any of the keys in Map contain any of the keys in keys.

containsValue(Object? value) → bool

Available on Map<K, V>?, provided by the NullableMapExtensions extension

Whether this map contains the given value.

containsValueAll(Iterable<Object?> values) → bool

Available on Map<K, V>?, provided by the NullableMapExtensions extension

Returns true if the value of Map contains all values.

containsValueAny(Iterable<Object?> values) → bool

Available on Map<K, V>?, provided by the NullableMapExtensions extension

Returns true if the value of Map contains one of values.

equalsTo(Map<K, V>? others) → bool

Available on Map<K, V>?, provided by the NullableMapExtensions extension

Returns true if the internals of Map and others are compared and match.

get<T>(K key, T orElse) → T

Available on Map<K, V>?, provided by the NullableMapExtensions extension

Retrieves the element key from Map.

getAsDateTime(K key, [DateTime? orElse]) → DateTime

Available on Map<K, V>?, provided by the NullableMapExtensions extension

Retrieves the element of key of type Map from Map.

getAsDouble(K key, [double orElse = 0.0]) → double

Available on Map<K, V>?, provided by the NullableMapExtensions extension

Retrieves the element of key of type double from Map.

getAsInt(K key, [int orElse = 0]) → int

Available on Map<K, V>?, provided by the NullableMapExtensions extension

Retrieves the element of key of type int from Map.

getAsList<T>(K key, [List<T>? orElse]) → List<T>

Available on Map<K, V>?, provided by the NullableMapExtensions extension

Retrieves the element of key of type List from Map.

getAsMap<T>(K key, [Map<String, T>? orElse]) → Map<String, T>

Available on Map<K, V>?, provided by the NullableMapExtensions extension

Retrieves the element of key of type Map from Map.

getAsSet<T>(K key, [Set<T>? orElse]) → Set<T>

Available on Map<K, V>?, provided by the NullableMapExtensions extension

Retrieves the element of key of type Set from Map.