CheckQuestion class final
A question a lesson step or an experiment step asks: the text, the answers accepted, and how many attempts a student has before an accepted answer is shown.
One shape for both documents. An edu_step entity carries it under
check, and a step of an f3d.experiment scenario carries it under the
same key, so the viewer that asks it and the wire that reports the
answer to a learning platform read one type.
Constructors
-
CheckQuestion({required String question, required List<
String> answers, int attempts = 1}) - A question with at least one accepted answer and at least one attempt. Throws an ArgumentError otherwise.
- CheckQuestion.fromJson(Object? json)
-
Reads what toJson wrote. Throws a
DocumentFormatExceptionnaming what is wrong.factory
Properties
-
answers
→ List<
String> -
Every answer accepted, as the author wrote it.
final
- attempts → int
-
How many answers a student may give before an accepted one is shown.
A count, at least 1.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- question → String
-
What the student is asked.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
accepts(
String given) → bool -
Whether
givenis one of answers, ignoring case and the white space around it:80 нмis80 нм. -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toJson(
) → Map< String, Object?> -
The question as an experiment step's
checkwrites it, withoutattemptswhen it is one. -
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited
Static Methods
-
fromStepProperties(
Map< String, Object?> properties) → CheckQuestion? -
The question
propertiescarries undercheck, or null when it carries none or one without a question or an accepted answer.