的JavaScript多維數組語法錯誤

Question

<script type="text/javascript"> 
    var personnel = new Array(); 

    var personnel[0] = new Array(); 
    personnel[0][0] = "Name0"; 
    personnel[0][1] = "Age0"; 
    personnel[0][2] = "Address0"; 

    var personnel[1] = new Array(); 

    personnel[1][0] = "Name1"; 
    personnel[1][1] = "Age1"; 
    personnel[1][2] = "Address1"; 

    document.write("Name:" + personnel[1][0]); 
</script> 

當它運行到瀏覽器中，我有這樣的錯誤：

SyntaxError: missing ; before statement var personnel[0] = new Array();

Answer 1

var personnel[0] = new Array(); is syntax error!

you can clean-up your code using [] instead of new Array()

試試這個：

var personnel = new Array(); 
 

 
personnel[0] = new Array(); 
 
personnel[0][0] = "Name0"; 
 
personnel[0][1] = "Age0"; 
 
personnel[0][2] = "Address0"; 
 

 
personnel[1] = new Array(); 
 

 
personnel[1][0] = "Name1"; 
 
personnel[1][1] = "Age1"; 
 
personnel[1][2] = "Address1"; 
 

 
document.write("Name:" + personnel[1][0]);

Answer 2

有有很多方法o也創建數組。

例如

// creates the same array but with a lot less typing. 
var personnel = [ // I have added a new line and then indented the nested arrays 
    ["Name0","Age0","Address0"], // adds an array in side the first 
    ["Name1","Age1","Address1"], // you separate all the items in the array with commas 
]; //close the array. 

有些人喜歡把它攤開更進一步像

var personnel = [ // always put the first opening braket here 
    [ 
     "Name0", // again indenting so it is easy to see where you are at 
     "Age0", 
     "Address0", // Javascript used not let you have a comma on the last 
        // element. Some people still think that should be enforced 
        // and some IDE will report it as an error. It is up to you. 
    ],[ // close the first and open the second array 
     "Name1", 
     "Age1", 
     "Address1" 
    ], 
]; //close the array. 

然後非常緊湊所有在一行。

var personnel = [["Name0","Age0","Address0"],["Name1","Age1","Address1"]]; 

您可以將陣列到陣列

var person0 = ["Name0","Age0","Address0"]; 
var person1 = ["Name1","Age1","Address1"]; 
var personnel = [person0, person1]; //the two arrays inserted into another array; 

或

var personnel = []; // create an empty array; 
personnel[0] = person0; // puts person0 array as the first item 
personnel[1] = person1; // and the second array as the second item 

而我個人最喜歡使用String.split方法分割字符串，並創建一個數組。

"Name0,Age0,Address0".split(","); // splits the string were there are ',' commas 
// creates the array ["Name0","Age0","Address0"]; 

分隔符可以是任何東西

"Name0 Age0 Address0".split(" "); //in this case a space is used 

甚至可以分割上的話

"Name0 banana Age0 banana Address0".split(" banana "); // splits at space banana space 

所以容易產生採用分體式嵌套數組。如果你有很長的列表，你想把它放入數組，那麼很方便。

var personnel = [ 
     "Name0,Age0,Address0".split(","), 
     "Name1,Age1,Address1".split(","), 
]; 

所有這些技術創造了完全相同的陣列，並且還有更多的方式來做到這一點。沒有正確或錯誤的方式，所以選擇適合你和愉快的編碼。

提高你的風格不僅使得它更容易和更快地編寫代碼，但也使人們更方便找到的錯誤和缺陷。

BTW script標籤不需要type="text/javascript"你需要的是<script>和關閉標籤的代碼之後</script>類型默認爲文本/ JavaScript的