Return a negative integer, zero, or a positive integer if this object is less than, equal to, or greater than the specified object:
this < that => <0
this == that => 0
this > that => >0
This method may also be accessed via the <
<=
<=>
>=
and >
shortcut operators. If not overridden the default
implementation compares the toStr
representations. Also see docLang.
Examples:
3.compare(8) => -1
8.compare(3) => 1
8.compare(8) => 0
3 <=> 8 => -1 // shortcut for 3.compare(8)
Set the content type for the payload of this message. (MQTT 5 only)
Compare this object to the specified for equality. This
method may be accessed via the == and != shortcut operators.
If not overridden the default implementation compares for
reference equality using the === operator. If this method
is overridden, then hash() must also be overridden such that
any two objects which return true for equals() must return
the same value for hash(). This method must accept null
and
return false.
Return a unique hashcode for this object. If a class overrides hash() then it must ensure if equals() returns true for any two objects then they have same hash code.
Publish this message with QoS 0
Publish this message with QoS 1
Publish this message with QoS 2
Should the message be retained?
Build and send the publish packet. A future is returned that will be completed when the acknowledgement is received according to the configure quality-of-service.
Get an immutable representation of this instance or throw NotImmutableErr if this object cannot be represented as an immutable:
Set the topic to publish to.
Return a string representation of this object.
Trap a dynamic call for handling. Dynamic calls are invoked with the -> shortcut operator:
a->x a.trap("x", null)
a->x() a.trap("x", null)
a->x = b a.trap("x", [b])
a->x(b) a.trap("x", [b])
a->x(b, c) a.trap("x", [b, c])
The default implementation provided by Obj attempts to use reflection. If name maps to a method, it is invoked with the specified arguments. If name maps to a field and args.size is zero, get the field. If name maps to a field and args.size is one, set the field and return args[0]. Otherwise throw UnknownSlotErr.
Add a user property to send with the publish. This method may be called more than once to add multiple user properties (MQTT 5 only)
Notify the recepient that the payload is UTF-8 encoded data. (MQTT 5 only)
This method called whenever an it-block is applied to an
object. The default implementation calls the function with this
,
and then returns this
.
Static
echoWrite x.toStr
to standard output followed by newline. If x
is null then print "null". If no argument is provided then
print an empty line.
Optional
x: JsObj
Utility to build a publish request and then send it.