javascript：将数组传递给函数 [英] javascript: pass an array to a function

问题描述

这里是我的javascript代码：

  var my_array = new Array（）; 
 my_array [0] =a; 
 my_array [0] =b; 
 my_array [0] =c; 
 
 print_array（my_array）; 
 
函数print_array（arr）
 {
 alert（arr）; 
} 
  

但它不起作用，因为我无法将数组传递给功能。那么，我该如何将整个数组传递给javascript函数呢？

编辑：
Nevermind。我发现了这个解决方案。

隐藏的原因是不好的做法，并将数组作为字符串传递：

如果有人需要将数组传递给函数，请首先使用：JSON.stringify（）和javascript将能够解析数组。

解决方案

问题在于你正在为每个元素分配索引 0 ，所以它们相互覆盖。 / p>

  //应该是
 my_array [0] =a; 
 my_array [1] =b; 
 my_array [2] =c; 
 
 //或者，如果您不想跟踪索引
 my_array.push（a）; 
 my_array.push（b）; 
 my_array.push（c）; 
  

其余代码看起来很好。您可以将整个数组或任何对象以这种方式传递给函数。

当您提醒它时，javascript将连接数组转换为逗号分隔的字符串以便查看。

here is my javascript code:

var my_array = new Array();
my_array[0] = "a";
my_array[0] = "b";
my_array[0] = "c";

print_array(my_array);

function print_array(arr)
{
   alert(arr);
}

But it doesn't work, because I can't pass the array to the function. So, how can I pass an entire array to javascript function?

EDIT: Nevermind. I found the solution.
Hidden cause this is bad practice and passes the array as a string:

If someone will need to pass an array to the function, first use this: JSON.stringify() and javascript will be able to parse an array.

解决方案

The problem is you are assigning each element to index 0, so they are overwriting each other.

// should be
my_array[0] = "a";
my_array[1] = "b";
my_array[2] = "c";

// alternatively, if you don't want to track the index
my_array.push("a");
my_array.push("b");
my_array.push("c");

The rest of the code looks fine. You can pass whole arrays, or any object for that matter to a function in exactly the manner you have shown in your code.

When you alert it, javascript will concatenate the array into a comma separated string for easy viewing.

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