json_helpers.dart File Reference

Functions
Object	readAsList (Map json, String key)
	Reads [key] from [json] and normalizes it to a list.
Object	readAsSingle (Map json, String key)
	Reads [key] from [json] only if the value is a map, otherwise returns null.
Object	readNestedAsList (Map json, String key)
	Reads [key] from [json], applies [_unwrapMap], and normalizes to a list.
Object	readWrappedAsList (Map json, String key)
	Unwraps a single-element array containing a single-key map into a list.
List< dynamic >	_asList (Object? value)
	null → [], [...] → [...], x → [x]
Object	_unwrapList (Object? value)
	[x] → x, otherwise identity
Object	_unwrapMap (Object? value)
	{"k": v} → v, otherwise identity

Function Documentation

_asList()

List< dynamic > _asList

(

Object?

value

)

_unwrapList()

Object _unwrapList

(

Object?

value

)

_unwrapMap()

Object _unwrapMap

(

Object?

value

)

readAsList()

Object readAsList	(	Map	json,
		String	key )

Applies [_asList] to handle both single objects and arrays.

readAsSingle()

Object readAsSingle	(	Map	json,
		String	key )

readNestedAsList()

Object readNestedAsList	(	Map	json,
		String	key )

Flattens {"key": [...]} down to the inner list.

readWrappedAsList()

Object readWrappedAsList	(	Map	json,
		String	key )

Applies [_unwrapList], [_unwrapMap], and [_asList] in sequence to flatten structures like [{"key": [...]}] down to the inner list.