得分手對象

Question

// function scoreHandArray scores your hand 
function scoreHandArray(hand) { 
    var score = 0; 
    for (i=0,i<hand.length,i++) { 
     score = score + hand[i].value; 
    }; 
    return score; 
}; 

console.log("You have the " + player[0].face + " of " + player[0].suit " and the " + player[1].face " of " + player[1].suit " for a score of " scoreHandArray(player)); 

你好，又是我！這裏這個函數中有一個錯誤，我無法找到，返回SyntaxError: Expected ';'。 （我知道這是功能，因爲註釋掉的console.log改變不了什麼。）功能scoreHandArray取對象的數組，並返回對象的得分。完整的源代碼在這裏：

// This code defines the Object constructor Card, used to make the card objects 
var Card = function(card) { 
    this.face = theFace(card); 
    this.suit = theSuit(card); 
    this.value = theValue(card); 
}; 

// This code creates the Deck to be used. 
var deck = []; 
for (i=0 ; i<52 ; i++) { 
    deck.push(i); 
}; 
for (i=51 ; i>0 ; i--) { 
    var random = Math.floor(Math.random()*i); 
    var temp = deck[random]; 
    deck[random] = deck[i]; 
    deck[i] = temp; 
}; 
// 0-12 is Spades. 
// 13-25 is Hearts. 
// 26-38 is Clubs. 
// 39-51 is Diamonds. 

// Now we create the hand of the player and dealer 
var player = []; 
var dealer = []; 

// Now to deal a card to player 
player.push(deck.pop()); 
dealer.push(deck.pop()); 

// and another 
player.push(deck.pop()); 
dealer.push(deck.pop()); 

// function theFace gives the face of a card 
function theFace(card) { 
    var faces = ["King","Ace","2","3","4","5","6","7","8","9","10","Queen","Jack"]; 
    return(faces[card%13]); 
}; 

// function theValue uses 'switch' to determine points from a card 
function theValue(card) { 
    var value = card % 13; 
    switch(value) { 

     case(0): 
     case(11): 
     case(12): 
      value = 10; 
      break; 

     case(1): 
      value = 11; 
      break; 

     default: 
      value = value; 
      break; 

    }; 
    return value; 
}; 

// function theSuit returns the suit of a card 
function theSuit(card) { 
    var suit; 
    if(card>38) { 
     suit = "Diamonds"; 
    }else if(card>25) { 
     suit = "Clubs"; 
    }else if(card>12) { 
     suit = "Hearts"; 
    }else { 
     suit = "Spades"; 
    }; 
    return suit; 
}; 

// function toObject the first (numbered) card of of a hand 
// and turns it into an Object with the desired properties 
function toObject(hand) { 
    var card = hand.pop(); 
    if (typeof(card) !== "number") { 
     hand.push(card); 
    } else { 
     var card = new Card (card); 
     hand.unshift(card); 
    }; 
    return hand; 
}; 

toObject(player); 
toObject(player); 
toObject(dealer); 
toObject(dealer); 

// function scoreHandArray scores your hand 
function scoreHandArray(hand) { 
    var score = 0; 
    for (i=0,i<hand.length,i++) { 
     score = score + hand[i].value; 
    }; 
    return score; 
}; 

console.log("You have the " + player[0].face + " of " + player[0].suit " and the " + player[1].face " of " + player[1].suit " for a score of " scoreHandArray(player)); 

奇怪，現在在for循環與;小號更換,年代後，現在響應ReferenceError: expected ')'。 )想要什麼？ （出現錯誤是在最後console.log線，作爲註釋掉它使誤差dissapear）。我數了數，在該行我有2 (和2 )！

Answer 1

它看起來像你的問題是在這裏：

for (i=0,i<hand.length,i++) { 
    score = score + hand[i].value; 
}; 

您需要;替換逗號在for循環。此外，}之後的分號不是必需的。

此外，在循環開始時使用var i=0是首選，也可以防止由於引用全局變量而導致的作用域問題。

Answer 2

您最好的選擇把所有的JavaScript代碼在JSLint。這將幫助你清理任何語法問題可能會級聯成問題，並幫助大部分時間跨瀏覽器兼容性。