object's properties, methods

[strato]

How to find out in Lianja what properties / methods of an object exist?
In VFP, the amembers() function returns a 2-dimensional array, with the names of properties / methods in the first column and "Property" / "Method" / "Event" in the second column.
Is there a corresponding function in Lianja?

[HankFay]

HI,

Lianja has amembers(): https://www.lianja.com/doc/index.php/AMEMBERS()

As the Doc notes, it does not support UI Framework classes.

Hank

[strato]

here is the code:

define class myForm as custom
   alias = ""
   szimbol = ""
   procedure setup 
        alias = "my_alias"
   endproc
   procedure main
        szimbol = "my_szimboL"
   endproc
enddefine

procedure _amember
private oForm
private array aRy[2,2]
  oForm = createobject("myForm")
  amembers(aRy,oForm,1)
for i = 1 to alen(aRy,1)
  ? iif(!empty(aRy[i,1]),aRy[i,1],""),iif(!empty(aRy[i,2]),aRy[i,2],"")
endfor

running in VFP, and the result:

ADDOBJECT    Method 
ADDPROPERTY     Method 
ALIAS  Property
BASECLASS     Property
CLASS   Property
CLASSLIBRARY     Property
COMMENT    Property
CONTROLCOUNT      Property
CONTROLS    Property
DESTROY    Event
ERROR   Event
HEIGHT  Property
HELPCONTEXTID    Property
INIT Event
LEFT  Property
MAIN  Method 
NAME   Property
NEWOBJECT    Method 
OBJECTS   Property
PARENT   Property
PARENTCLASS     Property
PICTURE  Property
READEXPRESSION     Method 
READMETHOD     Method 
REMOVEOBJECT     Method 
RESETTODEFAULT     Method 
SAVEASCLASS      Method 
SETUP  Method 
SHOWWHATSTHIS      Method 
SZIMBOL   Property
TAG  Property
TOP  Property
WHATSTHISHELPID     Property
WIDTH  Property
WRITEEXPRESSION     Method 
WRITEMETHOD     Method

the same in Lianja (with a little modif, since Lianja's amember() has only 2 paremeters:

define class myForm as custom
   alias = ""
   szimbol = ""
   procedure setup 
        alias = "my_alias"
   endproc
   procedure main
        szimbol = "my_szimboL"
   endproc
enddefine

procedure _amember
private oForm
private array aRy[2,2]
  oForm = createobject("myForm")
  amembers(aRy,oForm)
for i = 1 to alen(aRy,1)
  ? iif(!empty(aRy[i,1]),aRy[i,1],""),iif(!empty(aRy[i,2]),aRy[i,2],"")
endfor

and the result:

 ALIAS
 SZIMBOL

[HankFay]

Hi,

FORM is a member of the UI Framework, and therefore per the docs is not covered by amembers().

Presumably if you were to write your own class, not based on the UI Framework classes, it would work. It only does properties, however, per the docs, as your custom class example demonstrates.

If you want it to do more, go to the Tickets on the main site Menu and file an Enhancement Request.

Hank

[barrymavin]

Hi Hank

He is just creating a. CUSTOM class which is non UI.

As per VFP if the third parameter is omitted or zero…

Put only a list of oObject's properties in ArrayName. In this case, ArrayName is one-dimensional. VFP objects only.

So Lianja works the same as it does not support the third parameter.

[HankFay]

Hi Barry,

Right. And if he wants it to support the 3rd parameter he can file an Enhancement Request, making the case for the utility of this enhancement.

For those reading: my batting average is 1.000 for ER's when I can make a significant Use Case. If it's just a "it would be nice" ER, my average is well about .500.

Hank

[strato]

hi Hank
"use case" is: I have a relatively large system in VFP that works to examine the structure of an object (at any depth) and works according to what methods an object has.
I know that all problems can be solved in many ways, so I could reorganize the system e.g. with the try-catch structure. However, it would be more work for me than to query the existing methods of an object.
I will ask for an ER if Barry suggests it. For now, I asked if there was a way in Lianja to query the existing methods of an object.

[HankFay]

Hi strato,

And in this case, the Docs already had the answer.

Hank

[strato]

sorry Hank, can you help me? What is the answer in the doc? How do I know the names of existing methods in an object?

[HankFay]

Hi Strato,

I posted a link to the amembers Doc in response to your first message in this thread. Did you click on it and read it?

To summarize the document:

1) amembers covers properties only

2) amembers does not work with UI Framework classes.

If you want it to do differently than the Doc states, a) file an Enhancement Request in which b) you make the case for it to be enhanced. When I am making the case, I typically present a Use Case, which I show a need for the change in a common programming situation. If there is no alternative to having the change, all the better. If it's a common need (more than 1 developer), even better.

Hank