IsDefined Class
Test if a value is defined the context, returning true or false.
This can be used to check if a value is available yet in the data context, for example isDefined({a}).
If the value exists but is null then true will still be returned. Consider using isNull if you wish to exclude null as well.
Location
- Namespace
- Fuse.Reactive
- Package
- Fuse.Reactive.Expressions 2.9.1
Interface of IsDefined
Operand : Expression uno
Inherited from ComputeExpression
GetArgument(int) : Expression uno
Name : string uno
Inherited from Expression
SourceFileName : string ux
hide
SourceLineNumber : int ux
hide
Subscribe(IContext, IListener) : IDisposable uno
See IExpression.Subscribe for docs.
Inherited from object
Equals(object) : bool uno
GetHashCode : int uno
GetType : Type uno
ToString : string uno
Attached UX Attributes
GlobalKey (attached by Resource) : string ux
Implemented Interfaces
IExpression uno
ISourceLocation uno
hide