[Dilettante_Pro]

RoyalHunt,
вариант

class GameMap {
  constructor() {
      this.data = this.createMap();
      this.data[2][2] = 1; //****

			// 0 - empty
			// 1 - box
  }

	createMap() {
		var arr = [];
		for (let i=0; i<10; i++){
                     arr[i] = [];
                    for (let j=0; j<10; j++){
			arr[i][j] = 0;
                    }
		}
		return arr;
	}

  save(){
  	alert(JSON.stringify(this));
  }
}
var test = new GameMap;
test.save();