MapExtension extension

on

• Map<String, dynamic>?

Methods

isNull(String name) → bool

Available on Map<String, dynamic>?, provided by the MapExtension extension

Returns true if this object has no mapping for {@code name} or if it has a mapping whose value is {@link #NULL}.

mapNotNull<T>(T transform(String, dynamic)) → List<T>

Available on Map<String, dynamic>?, provided by the MapExtension extension

Returns a list containing the results of applying the given transform function to each element in the original Map. If the tranform returns null, it is not included in the output list.

opt(String name) → dynamic

Available on Map<String, dynamic>?, provided by the MapExtension extension

Returns the value mapped by {@code name}, or null if no such mapping exists.

optBoolean(String name, {bool fallback = false}) → bool

Available on Map<String, dynamic>?, provided by the MapExtension extension

Returns the value mapped by {@code name} if it exists and is a boolean or can be coerced to a boolean, or {@code fallback} otherwise.

optDouble(String name, {double fallback = double.nan}) → double

Available on Map<String, dynamic>?, provided by the MapExtension extension

Returns the value mapped by {@code name} if it exists and is a double or can be coerced to a double, or {@code fallback} otherwise.

optInt(String name, {int fallback = 0}) → int

Available on Map<String, dynamic>?, provided by the MapExtension extension

Returns the value mapped by {@code name} if it exists and is an int or can be coerced to an int, or {@code fallback} otherwise.

optJSONArray(String name) → List?

Available on Map<String, dynamic>?, provided by the MapExtension extension

Returns the value mapped by {@code name} if it exists and is a {@code JSONArray}, or null otherwise.

optJSONObject(String name) → Map<String, dynamic>?

Available on Map<String, dynamic>?, provided by the MapExtension extension

Returns the value mapped by {@code name} if it exists and is a {@code Map}, or null otherwise.

optNullableBoolean(String name, {bool remove = false}) → bool?

Available on Map<String, dynamic>?, provided by the MapExtension extension

Returns the value mapped by name if it exists, coercing it if necessary, or null if no such mapping exists. If remove is true, then the mapping will be removed from the Map.

optNullableDouble(String name, {bool remove = false}) → double?

Available on Map<String, dynamic>?, provided by the MapExtension extension

Returns the value mapped by name if it exists, coercing it if necessary, or null if no such mapping exists. If remove is true, then the mapping will be removed from the Map.

optNullableInt(String name, {bool remove = false}) → int?

Available on Map<String, dynamic>?, provided by the MapExtension extension

Returns the value mapped by name if it exists, coercing it if necessary, or null if no such mapping exists. If remove is true, then the mapping will be removed from the Map.

optNullableString(String name, {bool remove = false}) → String?

Available on Map<String, dynamic>?, provided by the MapExtension extension

Returns the value mapped by name if it exists, coercing it if necessary, or null if no such mapping exists. If remove is true, then the mapping will be removed from the Map.

optPositiveDouble(String name, {double fallback = -1.0, bool remove = false}) → double?

Available on Map<String, dynamic>?, provided by the MapExtension extension

Returns the value mapped by name if it exists and is a positive double or can be coerced to a positive double, or fallback otherwise. If remove is true, then the mapping will be removed from the Map.

optPositiveInt(String name, {int fallback = -1, bool remove = false}) → int?

Available on Map<String, dynamic>?, provided by the MapExtension extension

Returns the value mapped by name if it exists and is a positive integer or can be coerced to a positive integer, or fallback otherwise. If remove is true, then the mapping will be removed from the Map.

optString(String name, {String fallback = ""}) → String

Available on Map<String, dynamic>?, provided by the MapExtension extension

Returns the value mapped by {@code name} if it exists, coercing it if necessary, or {@code fallback} if no such mapping exists.

optStringsFromArrayOrSingle(String name, {bool remove = false}) → List<String>

Available on Map<String, dynamic>?, provided by the MapExtension extension

Returns the value mapped by name if it exists and is either a List of String or a single String value, or an empty list otherwise. If remove is true, then the mapping will be removed from the Map.

put(String name, dynamic object) → void

Available on Map<String, dynamic>?, provided by the MapExtension extension

putIterableIfNotEmpty(String name, Iterable? collection) → void

Available on Map<String, dynamic>?, provided by the MapExtension extension

Maps name to collection after wrapping it in a List, clobbering any existing name/value mapping with the same name. If the collection is empty, any existing mapping for name is removed. If the objects in collection are JSONable, then they are converted to Map first.

putJSONableIfNotEmpty(String name, JSONable? jsonable) → void

Available on Map<String, dynamic>?, provided by the MapExtension extension

Maps name to jsonable after converting it to a Map, clobbering any existing name/value mapping with the same name. If the Map argument is empty, any existing mapping for name is removed.

putMapIfNotEmpty(String name, Map<String, dynamic> map) → void

Available on Map<String, dynamic>?, provided by the MapExtension extension

Maps name to map after wrapping it in a Map, clobbering any existing name/value mapping with the same name. If the map is empty, any existing mapping for name is removed. If the objects in map are JSONable, then they are converted to Map first.

putObjectIfNotEmpty(String name, Map<String, dynamic>? jsonObject) → void

Available on Map<String, dynamic>?, provided by the MapExtension extension

Maps name to jsonObject, clobbering any existing name/value mapping with the same name. If the Map is empty, any existing mapping for name is removed.

putOpt(String? name, Object? value) → void

Available on Map<String, dynamic>?, provided by the MapExtension extension