javascript - 如何用双括号声明数组

Question

我正在尝试以这种方式创建一个数组:

var cell = [];    
cell[0][0] = "Förnamn:";    
cell[0][1] = "Efternamn:";    
cell[0][2] = "Telefon:";    
cell[1][1] = "Leitet";    
cell[1][2] = "7716";    
cell[2][0] = "Mats";    
cell[2][1] = "Loock";    
cell[2][2] = "7714";

但是我得到这个错误:

Cannot set property '0' of undefined

我也试过这个:

var cell = new array[]

并得到这个消息:

Unexpected token ]

并试过这个:

var cell = new array()

但是得到这个错误:

array is not defined

所以我需要帮助来声明我的变量。以下工作很重要:

cell[0][0] = "Förnamn:";
cell[0][1] = "Efternamn:";
cell[0][2] = "Telefon:";
cell[1][0] = "Johan";
cell[1][1] = "Leitet";
cell[1][2] = "7716";
cell[2][0] = "Mats";
cell[2][1] = "Loock";
cell[2][2] = "7714";

Answer 1

var a = new Array();
a[0] = new Array();

或

var a = [[]];

适用于您的案例:

// if you want to be explicit
var cell = [] 
cell[0] = ["Förnamn:", "Efternamn:", "Telefon:"]
cell[1] = ["Johan",    "Leitet",     "7716"    ]
cell[2] = ["Mats",     "Loock",      "7714"    ]

// or
var cell = [
    ["Förnamn:", "Efternamn:", "Telefon:"],
    ["Johan", "Leitet", "7716"],
    ["Mats", "Loock", "7714"]
]