Uncaught TypeError: Cannot read property 'forEachAlive' of undefined

[tiagonbotelho]

I'm using phaser to make a game to have some fun and im almost finishing the game but i came across a problem thats i breaking the game and honestly i cannot fix it.

 

I'm making a sort of Flappy Bird game to start out, and when the walls pass the screen i remove them 

  this.walls.forEachAlive(function(wall) {        if(wall.x + wall.width < game.world.bounds.left) {          wall.destroy();        }      });

but it gives me the error:  Uncaught TypeError: Cannot read property 'forEachAlive' of undefined.

 

Any tips? thank you!

[Henryk]

Similar problem. You've found out any way, yet?

[Lawen]

You missed the callback context:

this.walls.forEachAlive(function(wall) {        if(wall.x + wall.width < game.world.bounds.left) {          wall.destroy();        }      }, this); // <-- context

http://docs.phaser.io/Phaser.Group.html#forEachAlive