How would I properly Alias DataManager.extractSaveContents?

[TheUnproPro]

I'm having troubles aliasing the Datamanger properly. I'm currently writing a plugin that I want to save new values to the save file. How would I properly alias this function, because I've tried both call and apply.

var fp_dmexc = DataManager.extractSaveContents
DataManager.extractSaveContents = function(contents) {
    fp_dmexc.call(this);
    FS_VARS = contents.fpData;
    FP = contents.fpAmount;
};

this results in an error... not sure why.

EDIT: I've left the makeSaveContents part default for now (besides adding in my 2 variables at the bottom properly, this works fine as long as I don't alias extractSaveContents)

 

[LTN Games]

Try this, I'm on my phone so I can't test.

var fp_dmexc = DataManager.extractSaveContents
DataManager.extractSaveContents = function(contents) {
// you forgot the argument contents
    fp_dmexc.call(this, contents);
    FS_VARS = contents.fpData;
    FP = contents.fpAmount;
};

Basically you forgot to add the argument for the main function inside your alias. If you were to use .apply instead you can simply do
.apply (this, arguments);

 

[TheUnproPro]

Thanks so much! It worked, thought I had tried that earlier but I guess I was wrong lol
basically I'm making a Faith Shrine script, pretty neat.