Hi,
I have a question concerning the exact semantics of
QJSValue::setProperty and QJSValue::deleteProperty functions.
Specifically, what happens if I do something akin to this example:
*) I evaluate a script using the QJSEngine::evaluate() function. As a
consequence I now have a set of properties in the global context of the
script engine corresponding to the script defined properties, such as
objects and functions
*) I copy? one of these functions into a container object living in the
global context using container.setProperty("functionName", function)
*) I delete the function object in the global context
global.deleteProperty("functionName")
My question is, does deleting the property "functionName" in the global
context also invalidate the copy in the container?
According to the QJSValue documentation:
Note that a QJSValue for which isObject() is true only carries a
reference to an actual object; copying the QJSValue will only copy the
object reference, not the object itself. If you want to clone an
object (i.e. copy an object's properties to another object), you can
do so with the help of a for-in statement in script code, or
QJSValueIterator in C++.
copying a QJSValue results in a flat copy, if the QJSValue wraps an
object. In JavaScript functions are objects. So, I am unsure, if the
global.deleteProperty("functionName") call just deletes this particular
object reference, or the object itself.
Thanks for any help,
Daniel
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