使用String.split返回的数组

Question

data = 'numbersXXXtext';

or

data = 'XXXtext';


var get = data.split('XXX');
var sum = get[1];

I would like get always "text". If data equals numbersXXXtext , the code works fine, but if data is XXXtext then get[1] is undefinded.

Does anyone know how I can solve this?

Answer 1

If there is only one occurrence of XXX in the string, the bit you want will always be the last item in the array returned by split . You can use pop to get the last item of an array:

var a = "numbersXXXtext";
var b = "XXXtext";

console.log(a.split('XXX').pop()); // "text"
console.log(b.split('XXX').pop()); // "text"

Answer 2

尝试这个：

var sum = get.length > 1 ? get[1] : get[0]

Answer 3

Strange, i just tried your code, and it's working. ( http://writecodeonline.com/javascript/ ) Are you sure you are not missing something?

    data = 'numbersXXXtext';
   //data = 'XXXtext';
    var get = data.split('XXX');

    document.write(get[1]);
    document.write("</br>");
    document.write(get);
    document.write("</br>");

I didn't get undefined in neither of your strings

Answer 4

An alternative using substring:

var data = 'numbersXXXtext';
var value = data.substring(data.indexOf('XXX') + 'XXX'.length);