Help with javascript `this` keyword and `bind`

[GoToLoop]

@vkbr

Not pasting the whole code, but making a pseudo example here to isolate the issue.

It’s hard to analyze it w/o seeing the whole context, but I’ll try.

@vkbr

make_Gpoint(){
  //blah
  gp = newGpoint(x, y, this); 
}

I believe you’ve meant new Gpoint instead of newGpoint, right?

Anyways, isn’t your Grid::make_Gpoint() method supposed to return a Gpoint instance?

Why do you instead assign it to some global variable inside that method?
That’s bad OOP coding practice!

@vkbr

constructor(/*blah*/, grid){
 //blah
this.grid = grid
}
//other stuff//

update(x, y){
  //some math involving 
  this.grid.someProp
 // I get here "can't access propety xyz of undefined."
}

What you describe above shouldn’t happen!

Property Gpoint::grid seems to be properly initialized w/ a Grid object.

So this.grid.someProp should work as long as someProp is a member of Grid.