将字符串值转换为Javascript数组的优雅方法？

Question

I have an ajax request that returns a list of values like this:

"1,2,3,4,5,6"

I need it to be a javascript array with numbers:

[1,2,3,4,5,6]

I tried:

var array = new Array("1,2,3,4,5,6".split(","))

But the numbers are still strings in the output:

["1","2","3","4","5","6"]

Is there a clean way to have it as a numbered array? Preferably without writing a function to iterate through it?

Answer 1

You need to loop through and convert them to numbers, like this:

var array = "1,2,3,4,5,6".split(",");
for(var i=0; i<array.length; i++) array[i] = +array[i];

Or, the more traditional example:

var array = "1,2,3,4,5,6".split(",");
for(var i=0; i<array.length; i++) array[i] = parseInt(array[i], 10);

Answer 2

A more jQuery-centric approach using jQuery.map() :

var str = "1,2,3,4,5,6";
var arr = $.map(str.split(","), function(el) { return parseInt(el, 10); });

Answer 3

Not sure if this counts as writing a function but you can use the map function in jquery. I saw you listed as a tag so I assume you are using:

var stringArray = "1,2,3,4,5,6".split(",");
var numberArray = $.map(stringArray,
    function(item, i)
    {
        return parseInt(item, 10);
    });

Answer 4

// jquery must have a way to do what any modern browser can do:

var str= "1,2,3,4,5,6";
var arr= str.split(',').map(Number);

// returns an array of numbers

Answer 5

If you trust the ajax response, and if (for whatever reason) you're committed to not using a loop, you can always go with eval :

var str = "1,2,3,4,5,6";
var array = eval("[" + str + "]");

Answer 6

If you don't wish to expliclty iterate you can use array.map , javascripts map function.

array.map(callbackFunc, array);

var arr = array.map(function(x) {return parseInt(x);}, "1,2,3,4,5,6".split(","));

http://www.tutorialspoint.com/javascript/array_map.htm

Theres probably a better reference somewhere but I don't us javascript enough to have a good favorite reference site.

EDIT - i see jQuery has its own map, thats probably worth looking into.