I am new in vb.net, and someone used 'My.Settings.*' on a vb.net program
I inherited.
I would like to know where the data are stored when using My.Settings in vb.net
If I have a member variable called IpAddress for example, can I have an other class using its own member variable called IpAddress without being confusing for the program ?
What if an other program is runing using a variable called IpAddress, can those be mixed up ?
My.Setting are stored in user/AppData/Local
You can have variables with same name in different scopes. Even though they appear to have the same name to you, they do not to the code.
Related
In my current project in Access VBA, I created a window which works like a console and now I am trying to add a possibility to display any public variable. It should work like:
Show_var [variable_name]
So it should be like in the direct window where i can type:
? pVar.variable_A
I found out that using
Application.VBE.ActiveVBProject.VBComponents(11).CodeModule.CountOfLines
I can display the number of lines within a module or form so I thought perhaps I could somehow find the variables there, cycle through them and when the correct one is found, its value can be shown. OFC I could make a Select Case Statement where all variables are included but that is not the way I want to do it because it is complicated and must be changed every time update my public variable list.
There are so many problems that I think you are out of luck. Let me just list some of them:
There is no way to get a list of all variables - that would mean you would need access to the internal symbol table.
As a consequence, you would have to read the code (CodeModule lets you read the code of a module), and write an own parser to fetch all declarations (hopefully you use Option Explicit)
AFAIK, the is no method that can access the content of a variable via it's name.
Even if there would be any such method: What would you do with different data types, arrays and especially with objects.
If a user runs into problems, often it is a runtime error. If you don't handle that errors with some kind of error handler, the only option if a user cannot enter the debugger is to press "End" - which would destroy the content of all variables.
You have to deal with scope of variables, you can have several variables with the same name and you will likely have lots of variables that are out of scope in the moment you want to dump them.
Is there a way in Java to have text file with listed a=10.35 b=20.57 c=30.79 and get program to only read the variable decimal values and assign them to declared variables a, b, c in the program.
Searched youtube found nothing.
Do not know if it is possible.
Do not know.
Got it working.
You can certainly read in the contents of the text file and parse it down to the chars and doubles.
If you are referring to declaring named variables based on the file, there is no way to do this directly at runtime. You can, however, use a data structure like a dictionary or map to store the data and access it using the name as a key.
If you could provide more details about what you are trying to do, that would make it easier to answer your question more specifically.
There is a task to call DLL file and get output to the promptassignment variable in automation anywhere. That DLL returns the object (with student name and age). Is there any way to extract that students name and age from Promptassignmet variable without calling another DLL? Thnak you in advance.
Not in the way you would want it to work, no.
Keep in mind that AA is by no means Object oriented. Hence, the parsing of the returned object needs to be done either in the dll itself (if you have access to its source code) or by AA's Before-After String operation.
Note that the latter is only viable when the returned Student object is not hashed, e.g. "Obj#12f837g", but has a ToString() format, e.g. "{student:{name:Foo, age:12}}".
In the former approach, instead of returning the Student object, you could return student.name + ";" + student.age; for example.
If neither of the 2 options listed above are viable for you, you can try creating a metabot via the Metabot Designer in the AAE Client. You can attach the dll and check if you can call its methods individually. The goal would be to find a Getter method for both 'name' and 'age'.
If all else fails, yes, you'll need to either run another dll which would serve your purpose, or create the dll yourself (this sounds like a fairly easy dll, but I could be wrong of course).
Hopefully one of the above will help you or at least guide you on finding your own solution.
A program variable is an abstraction of a computer memory cell or collection
of cells. Programmers often think of variable names as names for memory locations, but there is much more to a variable than just a name.
In this case, what is an anonymous variable?
What does the below statement mean?
Variables without names are called anonymous variables.
Can you provide language specific examples for the same?
In C++, reference variable to const can be initialized by constant.
In this point, temporary variable is created in memory to grab the constant.
const int &ref = 3;
like this. so we can call this temporary variable to "anonymous variable".
Variables are where you store you values. 'Variable Name' is the usually the easiest (and more human-like) way to locate your value.For example, if I am a variable, you can get my value by calling my name, and the combination of my value and my name is called 'variable'.
However, not all variables need a name.Sometimes you just use them once and don't need them anymore; and in that case, a name is unnecessary.
The example given by #BAE HA RAM is a telling one,in which case you don't need a name for the value but ref to it by a pointer(But still got a name for that pointer)..
There are also many other anonymous things, anonymous type, anonymous function and so on. Most of them are created to avoid too many meaningless names for the things that you only need to run once.
I'd like to know which language you are using, so more specific example can be given...
In VBA, I want to use a name for a local variable that I'd also like to use for a function name. The problem I'd that the function name formatting always changes to the local variable formatting.
Any way to prevent that?
I highly recommend not using the same name for disambiguation purposes. Also, if VBA is not case sensitive, it may not know whether you are referring to the function or the variable and thus give a runtime error (I don't think it is compiled per se, but it goes to a proprietary p-code intermediate.)
Often when you'd like the names to be similar, it can be useful to prepend an underscore to one, such as a local variable. Thus I recommend you name the function FunctionName and the variable _FunctionName if you want to go that route.
If you want to try having the same name for each, you will likely need to edit the code outside of the IDE that is reformatting your code. In an editor that doesn't try to auto-format, you may be able to force it. Then whether it compiles or not is the question.
In Visual Basic, each function already has a variable named after the function. Assigning a value to this variable is the only way to set a return value for this function.
Therefore, declaring yet another variable of the same name creates ambiguity. You cannot do so. It results in the Duplicate declaration in current scope error.
And if by "local" variable you meant a module-level variable, then you cannot do it either: Ambiguous name detected: %s.
And if you are asking about a situation when a function and a variable of the same name belong to different scopes, then VBA will use the case of the line that was edited last. So if you declare a function and then declare a variable in another module, the function name will change case. But if you then return to the function, change its casing back and press Enter, the variable, in its turn, will change its casing to match the function name.