Question

我刚开始学习javascript，在设计10针保龄球记分卡背后的逻辑时，我遇到了一些障碍。如果有人可以帮我弄清楚如何使用forScore循环将所有值加在一起，而不是下面的totalScore函数，我会非常感激。我到目前为止的代码如下。提前谢谢！

function Game() {
    this.scorecard = []
};


Game.prototype.add = function(frame) {
    this.scorecard.push(frame)
};

Game.prototype.totalScore = function() {
(this.scorecard[0].rollOne + this.scorecard[0].rollTwo)+
(this.scorecard[1].rollOne + this.scorecard[0].rollTwo)+
(this.scorecard[2].rollOne + this.scorecard[0].rollTwo)+
(this.scorecard[3].rollOne + this.scorecard[0].rollTwo)+
(this.scorecard[4].rollOne + this.scorecard[0].rollTwo)+
(this.scorecard[5].rollOne + this.scorecard[0].rollTwo)+
};


function Frame() {};

Frame.prototype.score = function(first_roll, second_roll) {
this.rollOne = first_roll;
this.rollTwo = second_roll;
return this
};

Frame.prototype.isStrike = function() {
return (this.rollOne === 10);
};

Frame.prototype.isSpare = function() {
return (this.rollOne + this.rollTwo === 10) && (this.rollOne !== 10)
};

Answer 1

  Game.prototype.totalScore = function() {
    total = 0;
    for(i = 0; i < this.scorecard.length; i++)
    {
       total +=this.scorecard[i].rollOne + this.scorecard[0].rollTwo;
    }
    return total;
};

Answer 2

在上面的示例中。

替换它：

＆＃13;

Game.prototype.totalScore = function() {
(this.scorecard[0].rollOne + this.scorecard[0].rollTwo)+
(this.scorecard[1].rollOne + this.scorecard[0].rollTwo)+
(this.scorecard[2].rollOne + this.scorecard[0].rollTwo)+
(this.scorecard[3].rollOne + this.scorecard[0].rollTwo)+
(this.scorecard[4].rollOne + this.scorecard[0].rollTwo)+
(this.scorecard[5].rollOne + this.scorecard[0].rollTwo)+
};

＆＃13;

有了这个：

＆＃13;

Game.prototype.totalScore = function() {
  var result = 0;
  for (var i = 0; i<6; i++) {
    result += this.scorecard[i].rollOne + this.scorecard[0].rollTwo;
  }
  return result;
};

＆＃13;

循环并将生成的值加在一起

2 个答案: