Saving and retrieving variables

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processor..

Saving and retrieving variables

in General Discussion • Other • 1 year ago

Hi:

I'm working on a project and I have a configuration page where the user can assign values to variables I want them to stay with the new settings. The problem is that once I close the program all settings are lost and the variables are initrialized when the program is executed again. My question is this: is there a way I can save the variables and retreive them at a later program execution? I thimk saving them as stings in a text file might work; but that seems to be a very labourios way. Is there any other easier way?

Thanks.

Replies(3)

Jesse Sco..

Re: Saving and retrieving variables

1 year ago

I think that saving to and reading from a text file is the best option in your case.

It's not that hard...

Check the reference, and search the forum a bit more if you have issues... there's dozens of examples here.

Hope that helps, feel free to comment back here if you need to...

processor..

Re: Saving and retrieving variables

1 year ago

Thanks for your prompt reply. I was digging here and could not find a good example. I'll appreciate if you can post a link for a good example I can use as guide. As the variables could be updated anytime, I'm thinking I'll have to blank the file at exit or create a pointer to the new values location somehow??? otherwise where I'm I going to look for the latest values if the text file gets bigger and bigger everytime new updates are made?. This is what is getting me nervous about it... A good example will be a great help.

Thanks again.

PhiLho

Re: Saving and retrieving variables

1 year ago

" that seems to be a very labourios way"
Programming is often laborious...
Sometime the language or the library (Processing is a kind of library) ease the work (eg. saveStrings() is much easier to use than the pure Java equivalence!) but at some point, you have to do some work, as a library cannot cover all the possible use case.
Of course, you were right to ask, as it is easy to overlook some facility...

saveStrings() actually overwrites the previous data in the file, so it won't grow continuously.
Ideally, you would need to call it only at exit time, but it is hard to reliability catch this event...

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