微信小程序（游戏）----五子棋（悔棋篇）

this.page.changeUndo = function(e){
      if (self.START_GAME){
        var lastM = self.myPoint.length - 1;
        var LastA = self.AIPoint.length - 1;
        self.drawChessboard();
        
        if (self.boolAI && !self.boolMy && lastM >= 0){
          self.ABSCISSA_ARRAY[self.myPoint[lastM].pointY].push(self.myPoint[lastM]);
          self.myPoint.splice(lastM, 1);

        } else if (!self.boolAI && self.boolMy && LastA >= 0){
          self.ABSCISSA_ARRAY[self.AIPoint[LastA].pointY].push(self.AIPoint[LastA]);
          self.AIPoint.splice(LastA, 1);

        }
        self.drawAll();
      }
    }