在javascript中传递一个多维数组到函数中

Question

我有一个这样的数组:

var array = [['h','e','l','l','o'],['1','2','3','4','5'],['a','b','c','d','e']]

，我有麻烦传递给一个函数这里是我使用的原始脚本:

for (var x = 0; x <= 2; x++) {
    var timesrun = 0;
    function runcode() {
        timesrun += 1;
        for (var n = 0; n <= 4; n++) {
            console.log(array[x][n]);
        } //end for loop 1
        if (timesrun == 2) {
            clearInterval(interval);
        }
    } //end of function
} // end for loop 2
var interval = setInterval(function () {
    runcode(array[x]);
}, 1000);

当我在函数内console.log时，我什么也得不到，但是如果我把内部的for循环从函数外取出，然后console.log，我得到期望值，所以我认为我没有正确地将值带入函数。

为了简单起见，我想用下面这个简单的例子来问这个问题:

function runcode(?){
    console.log(array[0][1]);  //which should return h.
}
runcode(?);

Answer 1

var array = [['h','e','l','l','o'],['1','2','3','4','5'],['a','b','c','d','e']],
    x = 0,
    timesrun = 0;
function runcode() {
    timesrun += 1;
    for (var n = 0; n <= 4; n++) {
        console.log(array[x][n]);
    }
    if (timesrun == 2) {
        clearInterval(interval);
    }
}    
var interval = setInterval(function () {
    for (x = 0; x <= 2; x++) {
        runcode(array[x]);
    }
}, 1000);

Answer 2

为了简单起见，我想用下面这个简单的例子来问这个问题:

function runcode(?){
    console.log(array[0][1]);  //which should return h.
}
runcode(?);

要访问a传递的变量，必须在函数头

中命名参数

所以如果你用array代替?，你已经很好了

function runcode(array){
              // ^^^^^ This is the name under which you can acces the passed variable
    console.log(array[0][1]);  //which should return h.
              //^^^^^ This is where you use it
}
runcode(array);
      //^^^^^ this is where you pass it //could be someOther2DimensionalArray

并应用于非工作代码

var array = [
    ['h', 'e', 'l', 'l', 'o'],
    ['1', '2', '3', '4', '5'],
    ['a', 'b', 'c', 'd', 'e']
],
    x = 0,
    timesrun = ~0;
function runcode(array) {
    x = timesrun += 1;
    for (var n = 0; n <= 4; n++) {
        console.log(array[x][n]);
    }
    if (timesrun == 2) {
        clearInterval(interval);
    }
}
var interval = setInterval(runcode, 1000, array);

这个应该可以。

注意setInterval的第三个参数用于传递array//runcode(array)